Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
Home
My WebLink
About
TM_Biogas-Utilization_10203725_CAAP-MethaneRecFS_2020-0717
Biogas Utilization Analysis Technical Memorandum CAAP – Methane Feasibility Study Completed by HDR Engineering, Inc. on behalf of the City of Iowa City, to support the Climate Action and Adaptation Plan (CAAP) and the associated Action Items 3.7 and 3.8. Iowa City, Iowa July 17, 2020 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 2 of 54 Table of Contents WWTP Gas Generation Overview ................................................................................................ 5 Landfill Gas Generation Overview ................................................................................................ 8 LFG Generation Model ................................................................................................................. 8 Waste Receipt ........................................................................................................................... 9 Observed Collection Efficiency .................................................................................................. 9 Methane Generation Rate Variable (k) .................................................................................... 10 Potential Methane Generation Capacity Variable (Lo) ............................................................. 11 LFG Model Results ..................................................................................................................... 12 Baseline Model ........................................................................................................................ 12 Organics Diversion Scenarios ................................................................................................. 13 Model Summary and Available LFG ........................................................................................... 15 Preliminary GHG Impact Analysis ........................................................................................... 16 Organics Diversion .................................................................................................................. 16 Biogas Conveyance Evaluation .................................................................................................. 16 Biogas Characteristics ................................................................................................................ 19 Wastewater Treatment Plant Biogas ....................................................................................... 19 Landfill Biogas ......................................................................................................................... 19 Biogas Utilization Potential ...................................................................................................... 20 Biogas Conditioning Technologies .............................................................................................. 20 Hydrogen Sulfide Removal ...................................................................................................... 21 Sorptive Solid Media ............................................................................................................ 21 Biological Scrubbers ............................................................................................................ 21 Chemical Scrubbers ............................................................................................................ 22 Water Vapor/Moisture Removal .............................................................................................. 22 Pressure Requirements ........................................................................................................... 22 Siloxane/VOC Removal ........................................................................................................... 22 Carbon Dioxide Removal ........................................................................................................ 22 Scrubbers ............................................................................................................................ 23 Membranes .......................................................................................................................... 23 Pressure Swing Adsorption ................................................................................................. 24 Oxygen and Nitrogen Removal ............................................................................................... 24 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 3 of 54 Biogas Utilization Alternatives ..................................................................................................... 24 Biogas Utilization Alternative 1: Natural Gas Pipeline Injection .............................................. 28 Alternative 1a: WWTP NG Pipeline Injection ....................................................................... 31 Alternative 1b: Landfill NG Pipeline Injection ....................................................................... 34 Biogas Utilization Alternative 2: Electricity Generation ............................................................ 37 Gas Turbines ....................................................................................................................... 37 Engine Generators ............................................................................................................... 37 Connection to the Electric Utility .......................................................................................... 38 Alternative 2a: WWTP Biogas Electricity Generation .......................................................... 39 Alternative 2b: Landfill Biogas Electricity Generation .......................................................... 45 Biogas Utilization Alternative 3: Natural Gas Replacement .................................................... 51 Alternative 3: WWTP NG Replacement ............................................................................... 51 Biogas Utilization Alternatives - SROI Analysis ....................................................................... 54 List of Figures Figure 1: Historical WWTP Digester Biogas Production ............................................................... 6 Figure 2: Projected WWTP Digester Biogas Production ............................................................... 7 Figure 3: Recoverable LFG Baseline .......................................................................................... 12 Figure 4: Recoverable LFG – All Scenarios ................................................................................ 14 Figure 5: Baseline Recoverable LFG with Estimated Collection Efficiency (CE) ........................ 15 Figure 6: Conceptual Biogas Pipe Alignment ............................................................................. 18 Figure 7: Water Scrubber Biogas Conditioning Simplified Schematic ........................................ 23 Figure 8: Membrane Biogas Conditioning Simplified Schematic ................................................ 24 Figure 9: PSA Biogas Conditioning Simplified Schematic .......................................................... 24 Figure 10: Low Diversion Scenario conceptual layout ................................................................ 26 Figure 11: Alternative 1a conceptual layout ................................................................................ 33 Figure 12: Altrenative 1b conceptual layout ................................................................................ 36 Figure 13: Alternative 2a-1 conceptual layout ............................................................................. 41 Figure 14: Alternative 2a-2 conceptual layout ............................................................................. 44 Figure 15: Alternative 2b-1 conceptual layout ............................................................................. 47 Figure 16: Alternative 2b-2 conceptual layout ............................................................................. 50 Figure 17: Alternative 3 conceptual layout .................................................................................. 53 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 4 of 54 List of Tables Table 1: Common Municipal WWTP Biogas Unbeneficial Constituents ..................................... 20 Table 2: Biogas produced for each biogas utilization alternative and diversion scenario ........... 27 Table 3: MidAmerican Energy Natural Gas Quality Requirements ............................................. 28 Table 4: MidAmerican Energy Fees – WWTP RNG Connection ................................................ 29 Table 5: MidAmerican Energy Fees – Landfill RNG Connection ................................................ 30 Table 6: Opinion of Probable Construction and O&M Costs for Alternative 1a........................... 32 Table 7: Opinion of Probable Construction and O&M Costs for Alternative 1b........................... 35 Table 8: Opinion of Probable Construction and O&M Costs for Alternative 2a-1 ....................... 40 Table 9: Opinion of Probable Construction and O&M Costs for Alternative 2a-2 ....................... 43 Table 10: Opinion of Probable Construction and O&M Costs for Alternative 2b-1 ..................... 46 Table 11: Opinion of Probable Construction and O&M Costs for Alternative 2b-2 ..................... 49 Table 12: Opinion of Probable Construction and O&M Costs for Alternative 3........................... 52 List of Attachments Attachment A – Baseline Iowa City LandGEM Model Reports Attachment B – Baseline Iowa City Landfill Gas Recovery Table Attachment C – Low Diversion and High Diversion Organics LandGEM Model Reports Attachment D – Baseline, Low Diversion and High Diversion Organics Recovery Table Attachment E – WWTP Biogas Analysis Attachment F – MidAmerican Energy RNG Transportation - Sample Agreement Attachment G – MidAmerican Energy NG Pipeline Costs - WWTP Attachment H – MidAmerican Energy NG Pipeline Costs - Landfill Attachment I – MidAmerican Energy Electrical Grid Interconnection Request Application Attachment J – Unison Solutions Biogas Conditioning System Proposal - WWTP Attachment K – Unison Solutions Biogas Conditioning System Proposal - Landfill Attachment L – Guild Associates Pressure Swing Absorption Proposal - Landfill Attachment M – MTU Engine Generator Proposal – WWTP Attachment N – MTU Engine Generator Proposal – Landfill Attachment O – Capstone Microturbine Proposal – WWTP & Landfill Attachment P – Capstone Microturbine Biogas Quality Requirements Attachment Q – Biogas Utilization Alternatives Opinion of Probable Capital and O&M Costs – No Diversion Scenarios Report prepared by: HDR Engineering, Inc. Morgan Mays, PE Project Manager 5815 Council St. NE, Suite B Cedar Rapids, IA 52302 D 319.423.6318 M 319.400.2718 Morgan.Mays@hdrinc.com Technical Memorandum Date: Tuesday, July 17, 2020 Project: City of Iowa City – Climate Action and Adaptation Plan Methane Feasibility Study To: City of Iowa City From: HDR Subject: Biogas Utilization Analysis TM In December 2019, the City of Iowa City (City) selected HDR Engineering, Inc. (HDR) to perform a feasibility study to meet objectives from the 2018 Climate Action and Adaptation Plan (CAAP). The CAAP contained objectives for conducting a study to determine the feasibility of methane generation, collection, processing, and potential re-use at the Iowa City Landfill and Recycling Center (Landfill) and/or the Wastewater Treatment Plant (WWTP). This memorandum evaluates alternatives for utilizing biogas at the Iowa City WWTP and Landfill as part of the City’s CAAP Methane Feasibility Study. WWTP Gas Generation Overview The Existing Facility Technical Memorandum (TM), which was completed previously for this project, contains information on the current biogas generation at the WWTP. The information presented in this TM includes projections of biogas quantities. Figure 1 presents historical WWTP digester biogas production rates from 2015 through 2020 with daily values represented by the blue diamonds, 30-day averages are shown by the thin black line, and long-term averages trended by the thicker dark line. The long-term trend shows biogas production rates average between 70 scfm in 2015 to just over 80 scfm in 2020. These biogas production rates reflect digester solids loading rates, characteristics of the solids, and process efficiency or solids reduction. The biogas yield for the process, based on the average biogas production rate and the average volatile solids destruction rate, is between 14 and 15 ft3/lb-VSr. This compares reasonably to the typical value of 15 ft3/lb-VSr and the normal range between 12 and 18 ft3/lb-VSr. Biogas testing conducted in 2010 shows the following breakdown: •Methane Content: 62.5% •Carbon Dioxide Content: 36.9% •Nitrogen Content: 0.40% •Oxygen Content: 0.14% •Hydrogen Sulfide Content: 98 ppmv •Total Siloxane Content: 263 mg/m3 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 6 of 54 A typical methane content is between 50 and 70%, and carbon dioxide is typically between 30 and 50%. Nitrogen and oxygen are minor biogas contributors originating from biological activity, release of dissolved gases, or air leaks. Hydrogen sulfide content can vary considerable by several orders of magnitude depending on background water quality and industrial contributions. Concentrations less than 1,000 ppmv are reasonable, and concentrations less than 200 ppmv are ideal for biogas uses. Siloxanes originate from personal care products and the biomedical industry. It is desirable to have low concentrations of siloxanes due to the formation of silicon dioxide combustion products. The siloxane concentration in biogas varies considerably depending on consumer behavior and industrial contributions. Iowa City’s biogas siloxane concentration reflects a high concentration; likely due to industrial contributions. Figure 1: Historical WWTP Digester Biogas Production Figure 2 shows the WWTP digester current biogas production rates as blue diamonds, and the trendline shows the projected average biogas production rates through 2030. These projections reflect increased WWTP solids production rates due to Iowa City population growth and do not include waste diversion. Biogas production rates are projected to increase from about 70 scfm in 2015 to 130 scfm in 2030. The existing digestion system has a capacity to produce between 125 and 150 scfm of biogas, as identified by the light green band in the figure, depending on solids thickening and digestion efficiencies. Organic diversion scenarios could produce between 200 and 250 scfm of biogas based on the solids loading rate and biogas yield values; however, this exceeds the capacity of the existing digestion system. These production rates are identified by the light red band in the figure. Several digestion system simulations (using the comprehensive anaerobic digestion model in the BioWin simulation tool) have been conducted, as introduced in the existing facility evaluation TM. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 7 of 54 These models account for differences between primary and secondary solids characteristics, a chemical oxygen demand (COD) balance on the process, a nitrogen balance on the process, a phosphorus balance on the process, and a sulfur balance on the process. In all, the model tracks 83 state variables across 174 reactions including biochemical and chemical conversions. Gas release rates are a function of kinectics and equilibrium as a function of headspace partial pressure. The complex chemistry in the digestion process includes evaluation of ionic balance, precipitation of phosphorus and sulfur containing compounds, acid and alkalinity balance, pH calculation, and conversion between chemical species. Biochemical reactions are evaluated based on established rate constants (first-order, Monod, Contois, and hybrid), Arrhenius constants, and switching functions (e.g. pH limitation). A stoichiometric or mass balance is maintained based on the established relationships between species for different reactions taking place. Please refer to EnviroSim Associates (https://envirosim.com/) and IWA reference texts (https://iwaponline.com/wst/article/45/10/65/6034/The-IWA-Anaerobic-Digestion-Model-No-1- ADM1) for a more comprehensive discussion of ADM modeling. The simulations conducted are based on the conventional TPAD operating mode at Iowa City. Simulations results were used to establish the existing digestion system and biogas production rates. The capacity needed to meet EPA biosolids requirements is consistent with the original design basis for the system. Additional capacity may be achieved with increased solids thickening to digester feed concentrations between 6 and 8%. Increased thickening may require digester mixing improvements. Additionally, increased loading rates on the digester may result in reduced stability thereby requiring increased monitoring. Should digestion of hauled wastes be implemented, a more in-depth evaluation of digestion needs and biogas production rates is recommended. . Figure 2: Projected WWTP Digester Biogas Production City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 8 of 54 Landfill Gas Generation Overview HDR has recently submitted an Existing Facility Evaluation TM to the City on March 20, 2020. Specifically regarding the Landfill, the Existing Facility Evaluation TM evaluated existing Landfill gas (LFG) collection and control system (GCCS) infrastructure and operations, including any planned future GCCS expansions and operational changes anticipated. This TM will not re-state all of the existing facility descriptions in the previous TM, but will reference and build upon the information and analyses previously provided to outline the creation of LFG generation and recovery projections for the Landfill. Baseline LFG recovery in future years is estimated, as well as exploring the effects on LFG recovery of organics diversion scenarios consistent with other aspects of the project. Excerpts from the previous TM are provided intact (noted in italics) for ease of reference, and to allow this TM to be a stand-alone document for future review. Landfill gas to energy (LFGTE) projects are based on the anaerobic decay of solid waste that naturally occurs in a landfill setting, which generates LFG. The quantity and quality of LFG generated is based on particular site variables. Some of these variables include moisture within the waste mass and the inclusion of organic materials such as foods, plant materials, wood, and biosolids, which can increase the amount of LFG produced within the Landfill. In order to appropriately design beneficial end uses for LFG, engineering evaluations must be made regarding the future generation and recovery of LFG at a particular site, or from a particular waste mass. This is known as LFG generation and recovery modeling. The EPA’s Landfill Gas Emissions Model (LandGEM) is one tool that is widely used for LFG generation modeling. This model is based on a first-order decay rate equation that allows for input of annual waste receipt tonnages, methane content of LFG, two variables, and the non-methane organic compound (NMOC) content of the LFG. These variables can be based on Clean Air Act (CAA) requirements, EPA’s Inventory default values, and/or site-specific data. Typically, CAA values are used when determining a facility’s compliance obligations with regulatory requirements, and inventory or site-specific values are used for emission inventory calculations and for collection and beneficial use evaluations. A series of LandGEM models have been developed for this analysis and the variables and assumptions used to develop the LFG models are discussed in the LFG Generation Model Section, below. LFG Generation Model The LFG generation and recovery analysis is based on the EPA LandGEM Model. This model is built upon the first-order decay rate equation as follows: City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 9 of 54 Equation 1: First-order decay rate Where: Qlfg = maximum expected gas generation flow rate, cubic meters Qlfg = maximum expected gas generation flow rate, cubic meters per year k = methane generation rate constant, per year or year-1 Lo = methane generation potential, cubic meters per megagram of solid waste Mi = mass of solid waste in the ith section, megagrams ti = age of the ith section, years The following subsections address each of the critical variables used in developing this model specifically for evaluating LFGTE projects, and how these variables are adjusted for landfill site conditions, which are consistent with the larger-scale greenhouse gas (GHG) calculations and comparisons performed under the project as a whole to address the CAAP. Waste Receipt Historical waste disposal tonnages and future anticipated tonnages are required to complete any LFG generation model. From the Existing Facility Evaluation TM: The current total permitted waste disposal capacity is approximately 8.4 million tons of municipal solid waste (MSW) for all cells. Based on historical waste disposal quantities, it is estimated that approximately 4.46 million tons of MSW are currently disposed of within the Landfill as of June 30, 2019. Recent records show that approximately 131,000 tons of waste is disposed of annually… …Current life of site estimates show the Landfill continuing to accept waste through approximately January 2043. Historical annual tonnages have been provided by the City and are included in the LFG generation model output files included in Attachment A. Based upon discussions with City staff future tonnages (from 2020 through 2049) have been assumed to remain constant with the 2019 annual disposal rate of 127,587 tons and drop to 80,765 tons in 2050 when the projected site life is exhausted. Observed Collection Efficiency In order to calibrate the LandGEM Model by comparing historical field data and modeling results as discussed above, HDR has estimated collection efficiency (CE) values for each year of the City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 10 of 54 model. CE is defined as the percentage of recoverable LFG that is collected, based on the design, capacity, coverage and operation of the GCCS. This estimation is based upon HDR’s understanding of the history and future operation of the GCCS (as presented in the previous TM), as well as HDR experience with similar landfills and GCCS design and operation. From the previous Existing Facility Evaluation TM: …Historical LFG recovery from initial system operation in 2001 through 2014 was not provided for this evaluation and were estimated based on an assumed LFG recovery efficiency of 60 percent based on the approximate coverage area of the gas system. The average LFG recovery flow rate during 2001 through 2014 was estimated to be approximately 480 [standard cubic feet per minute] scfm. Actual LFG recovery flow data was provided by the City from December 2015 through December 2019. During 2015 and 2016 the system was operating at an average of approximately 630 scfm. From 2017 to 2019, the average flow rate increased to approximately 850 scfm during the past three years. The 2017 through 2019 enhanced gas recovered rates are believed to be attributed to the new flare and blowers that were installed in 2016… Attachment B shows the actual collection efficiencies observed to calibrate the model from 2015 to 2019. Looking into the future of GCCS CE, the Existing Facility Evaluation TM also provides a brief description of known LFG system expansion based on discussions with City staff and future planned activities. From the Existing Facility TM: …Based on the planning efforts outlined above the collection efficiency of the existing and future LFG collection system should generally improve and future Landfill expansions will incorporate LFG collection efforts in a timely manner and in accordance with regulatory requirements… Based on the site-specific information obtained from City data, HDR estimates a future CE of 80 percent starting in 2020, and increasing to 90 percent upon final closure and capping in 2051. Details of CE estimates for each year are provided in Attachment B. Methane Generation Rate Variable (k) The Methane Generation Rate, k, determines the rate of methane generation for a unit mass of waste in the Landfill. This value is highly dependent upon moisture in the waste mass. The higher the value of k, the faster the methane generation rate increases and then subsequently decays over time. EPA’s LandGEM Model includes a range of values depending on site climate conditions and model purpose. These values range from 0.02 year-1 (for arid locations) to 0.7 year-1 (for wetter locations). Per EPA’s LandGEM Model guidelines, arid landfills are sites located in areas that receive an average of less than 25 inches of rainfall per year. A review of the City’s actual rainfall data indicates that the actual rainfall values are well above 25 inches per year (approximately 37 inches per year, depending on source). Therefore, a k value of greater than 0.02 year-1 should be chosen. In the development of the models, HDR analyzed the results of various k values to best-fit the data to the actual LFG flowrates compiled from 2015-2019. Based on the average site precipitation and observed flow rate data, a k value of 0.061 year1 has been chosen for the City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 11 of 54 baseline model. This value is also consistent with the document "Gas Recovery Modeling Report" produced by SCS Engineers in 2010 for the Landfill. This value resulted in quite reasonable observed CE results when calibrated against the actual LFG flow rate data from 2015- 2019. It should be noted that higher “k” values provide for a more responsive model that is more sensitive to the annual tonnages received and corresponds more closely with annual waste receipt. Conversely, lower “k” values provide a more subdued response to tonnage fluctuations. This will become important when describing the organics diversion scenarios and associated variables in the LFG Model Results section. Potential Methane Generation Capacity Variable (Lo) The Potential Methane Generation Capacity, Lo, depends on the type and composition of waste placed in the Landfill. The higher the cellulose content of the waste, the higher the value of Lo. The default Lo values used by LandGEM are generally representative of municipal solid waste (MSW), but site-specific data can and should be used when available. HDR is performing large-scale GHG calculations for the CAAP project as a whole, based generally on Intergovernmental Panel on Climate Change (IPCC) protocols. Consistent with this methodology, the Lo value has been calculated based on weighted averaging of degradable organic carbon (DOC) using waste-type percentages obtained from the 2017 Iowa Statewide Waste Characterization Study (Iowa City Landfill values) instead of IPCC regional default data. The Lo value was calculated using actual waste characterization at the Landfill and default IPCC DOC values for each waste type as follows: Lo = MCF×DOC×DOCF×F×1.333 Where: Lo = methane generation potential MCF = methane correction factor based on type of landfill site for the year of deposition: Managed = 1, Unmanaged (≥5m) = 0.8, Unmanaged (<5m) = 0.4, Uncategorized = 0.6 DOC = degradable organic carbon in year of deposition, fraction (metric tonnes C/metric tonnes waste) DOCF = fraction of DOC that is ultimately degraded F = fraction of methane in landfill gas generated; assumed equal to 0.5 1.333 = molecular weight ratio of methane and carbon This equation yields a weighted average Lo of 0.068 metric tonnes methane per metric tonnes waste. Converting to the units required for the LandGEM’s first-order decomposition rate City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 12 of 54 equation, this yields a Lo value of 104 cubic meters per megagram (m3/Mg) for the baseline model. Similar to the “k” value, this “Lo” value is adjusted when describing the organics diversion scenarios and associated variables in the following section. LFG Model Results The following section provides a discussion regarding the LFG modeling results, which includes the baseline model and the organics diversion scenarios. Baseline Model In order to determine the future LFG recovery for use in any LFGTE project and/or for GHG calculations and reductions, a baseline model has been developed using the selected variables as described in the previous section. This model is presented in Attachment A, with the results compiled in Attachment B and summarized in Figure 3: Figure 3: Recoverable LFG Baseline Note that the graph in Figure 3 shows the baseline “Recoverable” LFG model output that has been calibrated with actual flow rates as available and future estimates of waste receipt. This is 0 200 400 600 800 1000 1200 1400 1600 2000 2010 2020 2030 2040 2050 2060 2070Average LFG Flowrate (SCFM)Year Recoverable LFGBaseline Total LFG - Recoverable(90% of Generation) City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 13 of 54 the model generation output discounted by an industry-standard 10 percent to account for the physical reality that 100 percent of the LFG generate by a waste mass cannot be collected outside of a laboratory setting. This is prior to the impact of any assumed or estimated CE (as defined earlier in this TM). Organics Diversion Scenarios In accordance with the City’s overall goals for this project as a part of the CAAP, the City is interested in the effects of organics to the LFG generation/recovery potential at the Landfill. This has been explored as follows: • The project-wide GHG analysis has utilized the 2017 Iowa Statewide Waste Characterization Study (Iowa City Landfill values) to understand the waste-types that are received by the Landfill. Analysis of this information shows that yard waste is already highly diverted from the Landfill and only contributes 1.9 percent of the waste receipt. • The same study indicates that food waste (loose and packaged) currently contribute 24.8 percent of waste receipt, with other organics contributing and additional 6.9 percent (weighted ratio of this value assumes 6.4 percent is food waste). This yields a total food waste contribution of 31.2 percent of the current waste stream received at the Landfill. • HDR has focused on food waste as a possible organics waste stream that could be diverted from the Landfill – assuming a robust city-wide source separation initiative. • Although diverting food waste from the Landfill would extend the life of the Landfill, the inherent site life benefit of organics diversion was not addressed in this evaluation in order to maintain a common timeline for evaluating all scenarios and associated effects of diversion. Therefore, HDR has developed additional LFG model scenarios to understand the effects of these food waste organics on the overall LFG generation/recovery potential at the Landfill. The methodology for modeling these scenarios involves discreetly modeling the LFG generation of the food waste stream itself, and then subtracting that average annual LFG flow from the baseline model to arrive at a new Recoverable LFG flow rate for each scenario. Since all diversion efforts are modeled to begin in 2021, the effects of these scenarios start to show in 2022. HDR has modeled a Low Diversion and a High Diversion scenario for this TM. The details of each scenario are as follows: • Low Diversion – assumes diversion of 20 percent of the food waste from the Landfill. This yields a food waste tonnage of 20 percent of the 31.2 percent of the annual estimated waste starting in 2021. • High Diversion – assumes diversion of 50 percent of the food waste from the Landfill. This yields a food waste tonnage of 50 percent of the 31.2 percent of the annual estimated waste starting in 2021. As stated, for both of these scenarios, the LFG generation of the food waste itself is calculated and then subtracted from the baseline model. To calculate the LFG generation of the food waste, the model utilizes the following variables, which differ from the baseline model: City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM •Tonnages are as noted above - averaging approximately 7,960 tons diverted annually in the Low Diversion model, and approximately 19,900 tons diverted annually in the High Diversion model. •The diversion start years are set at 2021 – with effects seen in 2022 and continue through the end of the projected Landfill life in year 2050. •k value of 0.185 year-1 was chosen – consistent with the default IPCC value for food waste. •Lo value of 76 m3/Mg was chosen based on the default IPCC DOC value of 0.15 for food waste converted to Lo by IPCC conversion (Lo = MCF×DOC×DOCF×F×1.333) and then converted to required units for the LandGEM. The individual LandGEM models for each of the diversion scenarios are provided in Attachment C, with the results compiled in Attachment D Figure 4, below, shows the results of this analysis: Figure 4: Recoverable LFG – All Scenarios As can be seen in Figure 4, the diversion scenarios reduce the Recoverable LFG as expected. The model quantifies these reductions and shows that the Low Diversion scenario would reduce the Recoverable LFG average annual flow rate by a maximum of approximately 5 percent, while the High Diversion scenario would reduce the Recoverable LFG average annual flow rate by a maximum of approximately 12 percent. Page 14 of 54 0 200 400 600 800 1000 1200 1400 1600 2000 2010 2020 2030 2040 2050 2060 2070Average LFG Flowrate (SCFM)Year Recoverable LFG -All Scenarios Total LFG - Recoverable(90% of Generation)LOW DIVERSION Total LFG - Recoverable(90% of Generation)HIGH DIVERSION Total LFG - Recoverable(90% of Generation) City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 15 of 54 Model Summary and Available LFG As shown from the plots of Recoverable LFG future potential, the Landfill will continue to increase LFG production into the future (through 2051) in all scenarios and will therefore require future collection of the LFG to achieve LFGTE goals as well as maintain environmental compliance. Based on the site-specific information obtained from City data, HDR estimates a future CE of 80 percent starting in 2020, and increasing to 90 percent upon final closure and capping in 2051. Details of CE estimates for each year are provided in Attachment B. Figure 5, below, summarizes the Baseline Recoverable LFG and Estimated Collected LFG for the Landfill into the future. Figure 5: Baseline Recoverable LFG with Estimated Collection Efficiency (CE) The reader is reminded of the application of CE to ultimately determine the LFG available for utilization. As stated in an earlier section of this TM: …Based on the planning efforts outlined above the collection efficiency of the existing and future LFG collection system should generally improve and future Landfill expansions will incorporate LFG collection efforts in a timely manner and in accordance with regulatory requirements… 0 200 400 600 800 1000 1200 1400 1600 2000 2010 2020 2030 2040 2050 2060 2070Average LFG Flowrate (SCFM)Year Recoverable LFG and Collected LFG Total LFG - Recoverable(90% of Generation)Total LFG - Collected (Variable Collection Efficiency) City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 16 of 54 As shown in the figure, taking the CE of the GCCS into account provides for a curve showing the collected LFG that is anticipated to be available for destruction or utilization in any of the LFGTE projects that may be contemplated without and organics diversion program in place. The tabular results are provided in Attachment B, and are generally summarized as follows: •Under baseline conditions (continued acceptance of food waste), the Landfill will collect an average of approximately 960 SCFM of LFG for use in 2021; •Increasing to above 1,000 SCFM in 2025, coincident with increasing recoverable generation as well as a leap in estimated CE from 80 percent to 85 percent. •Maximum collected LFG will peak in 2051 at 1,250 SCFM one year after ceasing waste acceptance and coinciding with an increase in estimated CE to a maximum value of 90 percent due to assumed capping and closure of the Landfill. Preliminary GHG Impact Analysis As a separate exercise from this TM, HDR has processed the Low and High organics diversion scenarios in the large-scale GHG model to determine the GHG impacts of various means of food waste disposal. Those results are characterized as follows: •The Low and High diversion food waste tonnages were modeled in Landfill, composting and anaerobic digester options to determine the GHG emissions potential for each. •The analysis shows that anaerobic digestion of the food waste produces the least amount of GHG’s followed by composting and then landfilling from a purely emission generation perspective and not accounting for beneficial use of the LFG. Taking these GHG emissions analyses results into account, this TM assumes that a portion of the food waste may be diverted from the Landfill in the future and the resultant reduced LFG recovered would be available for beneficial use. Organics Diversion The amount of potential food waste diverted in the 50 percent High Diversion scenario (approximately 19,900 tons average annual) is expected to be a high end limit that would hard to obtain in the near term and sustaining over the long term. Food waste diversion on this scale would require a cultural change in citizen behaviors and may require policymaking to ban certain portions of the waste stream from the Landfill such as food scraps from commercial restaurants and eateries. The 20 percent Low Diversion scenario (approximately 7,960 tons annual average) has a higher probability of being attainable and sustainable by the City over the long term than the High Diversion scenario. It will still require public outreach, but could be achievable on a voluntary basis by citizens. Biogas Conveyance Evaluation The City desires a synergistic approach with respect to the Climate Action Goals between the WWTP and the Landfill. One way to achieve this goal, and to simplify biogas utilization is to install City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 17 of 54 a biogas conveyance pipe between the WWTP and Landfill. This would allow biogas produced at the WWTP to be conveyed to the Landfill for blending with the Landfill biogas. The combined biogases would then be processed for utilization. A desktop planning level evaluation was conducted to determine the feasibility of installing an interconnecting biogas pipe. Figure 6 shows a conceptual biogas pipe alignment between the WWTP and the Landfill. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 19 of 54 The approximate length of pipe line shown in Figure 6 is ten miles. The pipe would need to cross the Iowa River and US Highway 218. There is opportunity to install portions of the biogas pipe in existing roadway right-of-way, however, easements would likely be required for other portions of the pipeline. Assuming a planning level cost of $300/ft, the opinion of probable construction costs for this pipeline is $16,000,000. In addition to the pipeline costs, there would be costs associated with biogas pressurization and moisture removal equipment. A new blower/compressor building would likely be required to convey the biogas. The costs of the biogas pipeline and related equipment required to blend the two biogases do not result in a positive sustainable return on investment. Also, the quality of the biogas at each location is different (e.g. the WWTP biogas is relatively high in siloxanes, the Landfill biogas is relatively high in oxygen). Therefore, the conditioning process would be further complicated by blending the two biogases together. Additionally, the environmental permitting associated with this pipeline would likely be difficult to obtain. For these reasons, it is recommended that the biogas produced at the Landfill and at the WWTP be utilized at the respective locations, and not combined prior to utilization. Biogas Characteristics Wastewater Treatment Plant Biogas As described in the Biogas Potential TM, the Iowa City WWTP currently produces biogas at an average rate of 114,000 ft3/d (79 scfm). The projected future WWTP biogas production rate is 154,400 ft3/d (110 scfm). The WWTP biogas is predominately composed of methane (62.5%) and carbon dioxide (36.9%), and contains lesser amounts of hydrogen sulfide, siloxanes, moisture, nitrogen, volatile organic compounds (VOCs) and oxygen. Detailed biogas quality data for the WWTP is included in Attachment E at the end of this TM. All of the biogas currently generated at the WWTP is combusted in a flare (aka waste gas burner) and is then released to the atmosphere. The flaring system converts the methane to carbon dioxide and water vapor. Methane absorbs solar radiation at a higher rate than carbon dioxide, therefore, the flaring process reduces the overall greenhouse potential of the biogas. However, the energy value of the biogas is not recovered or utilized in the flaring process. Landfill Biogas Based on the 2017 through 2019 average gas system flow rates, the Iowa City Landfill currently recovers 1,224,000 ft3/d (849 scfm) with a future projected biogas recovery rate of 1,440,000 ft3/d (1,000 scfm) over the next 8 to 10 years. A detailed biogas quality analysis has not been performed on the Landfill biogas, but methane and H2S concentrations have been measured in the past. For purposes of this study the following Landfill biogas quality was assumed: • Methane: 50% vol City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 20 of 54 •Carbon Dioxide: 45% vol •Oxygen: 1-2% vol •Nitrogen: 3-5% vol •Hydrogen Sulfide: 500 ppmv •Other Constituents: 1% vol Similar to the WWTP biogas, all of the biogas currently generated by the Landfill is combusted in a flare and released to the atmosphere without beneficial use or energy recovery. Biogas Utilization Potential The methane component of the biogas possesses the highest level of energy potential. It is beneficial to capture this energy potential and use it to offset a portion of the City’s existing energy usage rather than flaring it. Possible beneficial uses of biogas include electricity generation and conversion to renewable natural gas (RNG). Biogas utilization alternatives are discussed in greater detail later in this TM. Some of the constituents contained in the WWTP and Landfill Biogas can have detrimental effects in biogas utilization applications. The following is a summary of the main unbeneficial biogas constituents, and a description of why they may have adverse effects in certain biogas utilization applications. Table 1 lists some of the common municipal WWTP biogas unbeneficial constituents. Table 1: Common Municipal WWTP Biogas Unbeneficial Constituents WWTP Biogas Constituent Potential Effects Hydrogen Sulfide Toxic chemical that causes corrosion in mechanical equipment. Carbon Dioxide Reduces the heating value of the gas. Siloxanes Can convert to silicon dioxide (sand/grit) in combustion engines, gas turbines and boilers, which wears components of the machinery. Oxygen Although uncommon in anaerobic digester biogas, it can lead to corrosion. Increases explosion risk at higher concentrations. Nitrogen Reduces the heating value of the gas. Water Vapor Reduces heating value, reacts with hydrogen sulfide to form sulfuric acid, causing corrosion. VOC’s Potentially toxic, can react in atmosphere with nitrogen oxides to create ozone and particulates resulting in smog. The amount of biogas conditioning (i.e. treatment) required varies among each of the proposed biogas utilization alternatives. The biogas utilization alternatives and the respective biogas conditioning requirements are described in the following sections. Biogas Conditioning Technologies The following sections provide a discussion on the various technologies available for removal of the unbeneficial constituents from biogas. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 21 of 54 Hydrogen Sulfide Removal Hydrogen sulfide is typically the first constituent removed from raw biogas. Hydrogen sulfide is removed while the biogas is fully saturated with moisture to reduce safety concerns associated with the potential exothermic nature of the treatment process. Another benefit of early removal is protection of downstream equipment from the potential exposure to sulfuric acid. Sulfuric acid can form from the mixture of condensed water and hydrogen sulfide. Depending on the concentrations present in the biogas, hydrogen sulfide can be removed as part of the carbon dioxide removal process, or it can be removed ahead of the process. Regardless of where it is removed, a treatment system will be needed in order to avoid it becoming an air emission concern. The following technologies can be considered for hydrogen sulfide removal with all biogas conditioning systems: • Sorptive solid media (iron sponge, activate carbon, silica gel, etc.) • Biological scrubbers • Chemical scrubbers Sorptive Solid Media Sorptive solid media have high surface area and/or reactive components that allow hydrogen sulfide molecules to adsorb or absorb to the media. Biogas passes through the packed bed media typically in stainless steel tanks. Adsorptive media, such as activated carbon or silica gel, trap the molecules on the surface of the media, removing it from the biogas. Absorptive media on the other hand, reacts and binds to the media. Iron sponge media is typically wood chips impregnated with iron oxide. The iron oxide reacts with the hydrogen sulfide and binds to the media as iron sulfide. Engineered iron oxide media, such as Sulfatreat, are also available for hydrogen sulfide removal. This media is typically more expensive than iron sponge, but are easier to remove once the media is exhausted. Activated carbon and silica gel can also be used for hydrogen sulfide removal; however, they are much more expensive than iron sponge or Sulfatreat media. These are only attractive if hydrogen sulfide levels are 50 ppm or less. Additionally, they also require dry biogas and should not be exposed to saturated biogas. The primary advantages of sorptive solid media include passive operation, simplicity of use, and reliability. The primary disadvantages of this treatment approach include the potentially large volumes of solid waste produced by disposal of the spent media, and the high cost of the media per amount of contaminant removed. Biological Scrubbers Biological scrubbers are also an effective technology for hydrogen sulfide removal. Biological scrubbers directly oxidize hydrogen sulfide to sulfate in a single reactor. The bacteria used in the reactor vessel are aerobic; therefore, air is introduced in the inlet to maintain biological function. The added air will ultimately reduce the heating value of the treated biogas. The ratio of air injection to hydrogen sulfide is typically 1:1. Most of the oxygen is consumed in the process so the residual nitrogen from air is the primary dilution factor. The systems are highly cost effective to operate, but careful understanding of the end use is necessary in order to avoid introducing oxygen or nitrogen into a system that would ultimately need to be removed. This can be a significant issue when an RNG/pipeline injection project is considered. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 22 of 54 Chemical Scrubbers Chemical scrubbers include caustic scrubbers and proprietary chemical scrubbers. Caustic scrubbers use sodium hydroxide to absorb hydrogen sulfide and some carbon dioxide to produce a solution of sodium sulfide, sodium hydrosulfide, as well as sodium bicarbonate and sodium carbonate. Some systems use caustic only, while others use caustic followed by a biological regeneration to reduce the amount of caustic used in the system. Caustic scrubbing is a commonly used process for hydrogen sulfide removal at low concentrations but infrequently used for high concentrations. The liquid stream from a caustic-only configuration results in sulfide lye as the final byproduct. Caustic scrubbing, followed by biological regeneration, is more commonly found in higher hydrogen sulfide concentration scenarios. Water Vapor/Moisture Removal Biogas is saturated with moisture as it leaves the anaerobic digester process and is present in landfill gas as well. Nearly all biogas end uses require at least some level of moisture removal. Moisture must be near completely removed for NG pipeline injection projects. Condensation of water vapor can be achieved through a cooling or refrigeration process. An adsorption technology may also be required for NG pipeline injection. This will capture the remaining moisture in the biogas, leaving a very dry product gas. Pressure Requirements Digester biogas pressure is typically maintained between 6 to 20 inches of water column (0.2 - 0.7 psig). There are a wide range of pressure requirements for end use and for associated biogas conditioning technology requirements that must be considered as part of a project. Pressure ranges from as little as 1 psig to as high as 200-250 psig depending on the technology used. Including pressure losses through pipelines and the treatment system, equipment necessary to operate biogas conditioning equipment could include low pressure booster blowers in order to deliver the biogas at a reasonable pressure to the gas conditioning equipment. For NG pipeline injection, the upgrading equipment will typically include a compressor that can increase pressure necessary to the full requirement of that particular system and for the NG pipeline for pressure injection. Siloxane/VOC Removal Siloxanes and VOCs are typically removed following moisture removal and compression, as the vessels have higher headloss and require a dry environment to work effectively. Siloxanes are removed using similar solid sorptive media as with hydrogen sulfide, as described above. In addition to siloxane removal, the media can be designed to serve as polishing to remove residual hydrogen sulfide and VOCs that may be in the biogas. Because of this polishing, the media can be exhausted as much by residual hydrogen sulfide and VOCs as it is by siloxanes, depending on concentrations. Carbon Dioxide Removal Carbon dioxide is the second most abundant component of digester and landfill biogas. For any end uses that require raising the quality of the biogas to near or at pipeline quality, removal of carbon dioxide is necessary. There are three main ways to remove carbon dioxide from biogas: scrubbers, membranes, and pressure swing adsorption. The following are brief descriptions of these technologies. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 23 of 54 Scrubbers Water scrubbing treatment systems use the water solubility of different gases that make up biogas in order separate those gases. Water scrubbers pressurize biogas in a packed tower with water spray. At higher pressures, gases such as hydrogen sulfide and carbon dioxide are more soluble in water than methane. Therefore the methane remains in the biogas stream and the other gases are stripped into the water. It should be noted that while water scrubbers remove hydrogen sulfide from biogas, they do not actually convert it to a final product so it must still be treated with an additional step to convert to a non-toxic final disposal product. A simplified schematic of the system is in Figure 7. Figure 7: Water Scrubber Biogas Conditioning Simplified Schematic Amine scrubbers operate under the same principle as water scrubbers, that carbon dioxide and hydrogen sulfide are more soluble in amine solutions than methane. Packed stripping towers are used to strip the unwanted gases from the methane. The amine solutions are regenerated by boiling off the spent amine solution in distillation column and then cooling to concentrate the amine solution for further use. The systems tend to be smaller in footprint and lower in cost than water scrubbers due to the higher solubility of carbon dioxide and hydrogen sulfide in amine solutions compared to water, however, there is additional energy use required to regenerate the amine solutions. As with water scrubbing the hydrogen sulfide off gas must still undergo a treatment method to convert the hydrogen sulfide gas to a non-toxic final disposal product. Membranes Membranes are another option to remove carbon dioxide from biogas. This technology must be used in combination with some of the previously discussed treatment steps to protect the integrity of the membrane. The number of membrane filtration steps determines the end quality of the gas and the overall methane recovery of the treatment process. Additional membrane stages produce a higher finished gas quality and greater methane capture. A simplified schematic of the system is in Figure 8. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 24 of 54 Figure 8: Membrane Biogas Conditioning Simplified Schematic Pressure Swing Adsorption Pressure swing adsorption (PSA) systems can be used to remove hydrogen sulfide, carbon dioxide, nitrogen, oxygen and siloxanes. The PSA process adjusts the adsorption of contaminants onto media under pressure and then regenerating the media under a vacuum. These systems typically operate with multiple pressure vessels so that the batch process of pressurizing the vessel, treating, and vacuum regeneration can be done while allowing for continuous operation. PSA systems are cost effective. However, depending on configuration, they may have a lower methane recover rate than scrubbers or membranes. Also, as with water scrubbers, hydrogen sulfide is removed from the biogas but still must be treated to avoid release to the atmosphere. A simplified schematic of the system is in Figure 9. Figure 9: PSA Biogas Conditioning Simplified Schematic Oxygen and Nitrogen Removal Oxygen is typically not found in biogas produced in anaerobic digestion processes, and nitrogen gas is typically present in relatively low quantities. Oxygen and nitrogen are both present in slightly higher quantities in landfill biogases, although they still make up a relatively low percentage of the overall biogas volume. Oxygen and nitrogen are commonly removed from biogas using a pressure swing adsorption process as described above. Biogas Utilization Alternatives Biogas utilization alternatives were developed to use the WWTP and Landfill biogas in ways that provide benefits for the City and the climate. The following utilization alternatives were evaluated for the WWTP and Landfill biogas: • Alternative 1: Natural Gas Pipeline Injection o Alt 1a: WWTP Pipeline Injection o Alt 1b: Landfill Pipeline Injection City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 25 of 54 • Alternative 2: Electricity Generation o Alt 2a: WWTP Electricity Generation 2a-1: Microturbines 2a-2: Engine Generators o Alt 2b: Landfill Electricity Generation 2b-1: Microturbines 2b-2: Engine Generators • Alternative 3: Natural Gas Replacement (WWTP only) An evaluation was performed to determine the impact on biogas generation quantity when some of the City’s organic matter is diverted from the Landfill to an anaerobic digester. The anaerobic digestion process is more efficient at converting organic material to biogas, so more biogas will be produced on a per pound organic material basis compared to a landfill. Each of the alternatives listed above was evaluated under three organics diversion scenarios: • No Organics Diversion • 1,500 tons Organics/Year Diversion • Low Diversion The No Organics Diversion scenario assumes that all organics material is disposed of in the Landfill (i.e. current operation). The 1,500 tons Organics/Year Diversion scenario assumes that 1,500 tons of organic material will be diverted from the Landfill to the existing WWTP anaerobic digester each year. The current available capacity in the WWTP anaerobic digester is 1,500 tons/year, therefore no additional digester capacity is required for this diversion scenario. It was assumed that as load increases at the influent to the WWTP over time, the WWTP solids will be thickened in order to maintain an available digester capacity of 1,500 tons organics/year. The Low Diversion Scenario assumes that 20% of the organic material (7,960 tons/year) is diverted from the Landfill to new anaerobic digesters located at the WWTP. The required anaerobic digester volume required for the Low Diversion Scenario is 1.4 MG. For the purposes of this study, it was assumed that the waste receiving station and anaerobic digesters required to accept the diverted organic material would be located at the WWTP. Figure 10 shows a conceptual layout of the waste receiving station and anaerobic digesters for the Low Diversion Scenario. The amount of biogas produced at the Landfill and WWTP will vary depending on the organics diversion scenario. Table 2 summarizes the amount of biogas produced for each biogas utilization alternative and diversion scenario. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4NTS Table 2: Biogas produced for each biogas utilization alternative and diversion scenario Alternative Description Location Biogas Source No Diversion Scenario 1,500 tons/yr Diversion Scenario Low Diversion Scenario 2020 2035 2050 2020 2035 2050 2020 2035 2050 SCFM SCFM SCFM SCFM SCFM SCFM SCFM SCFM SCFM 1 1a NG Pipeline Injection WWTP WWTP AD 80 120 160 121 161 201 80 120 160 New Diversion AD ----- ----- ----- ---- ---- ---- 121 121 121 Total ----- ----- ----- ---- ---- ---- 201 241 281 1b NG Pipeline Injection Landfill Landfill 945 1150 1200 945 1140 1190 945 1095 1150 2 2a-1 Electricity Generation - Microturbines WWTP WWTP AD 80 120 160 121 161 201 80 120 160 New Diversion AD ----- ----- ----- ---- ---- ---- 121 121 121 Total ----- ----- ----- ---- ---- ---- 201 241 281 2a-2 Electricity Generation - Engine Generators WWTP WWTP AD 80 120 160 121 161 201 80 120 160 New Diversion AD ----- ----- ----- ---- ---- ---- 121 121 121 Total ----- ----- ----- ---- ---- ---- 201 241 281 2b-1 Electricity Generation - Microturbines Landfill Landfill 945 1150 1200 945 1140 1190 945 1095 1150 2b-2 Electricity Generation - Engine Generators Landfill Landfill 945 1150 1200 945 1140 1190 945 1095 1150 3 NG Replacement WWTP WWTP AD 80 120 160 121 161 201 80 120 160 New Diversion AD ---- ---- ---- ---- ---- ---- 121 121 121 Total ---- ---- ---- ---- ---- ---- 201 241 281 Detailed opinion of probable costs and opinion of O&M costs were developed for the No Diversion scenario for each alternative. The No Diversion scenario costs were then extrapolated to estimate costs for the two diversion scenarios for each alternative. The estimated biogas quantities for each scenario as a basis for the extrapolation. Equipment proposals were also obtained for the No Diversion scenario for each alternative. The following sections describe the biogas utilization alternatives in greater detail. Biogas Utilization Alternative 1: Natural Gas Pipeline Injection Biogas can also be processed to a pipeline-quality high-Btu natural gas, called renewable natural gas (RNG). Renewable natural gas can be injected into a nearby natural gas pipeline and the energy and/or environmental attributes sold to the local utility or other buyer(s) at other locations. The RNG is sometimes processed further (compression) to produce alternative transportation fuels such as compressed natural gas (CNG). The City is not interested in CNG fueling stations at this time, so this alternative was not analyzed. MidAmerican Energy is the natural gas utility that serves both the WWTP and Landfill, and has indicated that it will allow the City to inject conditioned biogas (i.e. renewable natural gas) into its natural gas pipeline. The City will be required to condition its biogas to meet MidAmerican Energy’s natural gas specifications, as shown in Table 3. Table 3: MidAmerican Energy Natural Gas Quality Requirements Component Concentration Btu Content Within 5% of serving pipeline average Carbon Dioxide < 3% by volume Nitrogen < 4% by volume Total Inerts (N2+CO2) < 5% by volume Oxygen < 0.3% by volume Water < 5 lb./mmscf Hydrogen Sulfide < 0.25 grain/Ccf Total Sulfur < 20 grain/Ccf Volatile Organic Compounds (VOCs) 0 ppm Total Silicon < 0.01 ppm In order to inject RNG into the MidAmerican Energy NG pipeline, the City would be responsible for providing the following: 1.Remote pressure control system. 2.Gas quality monitoring equipment. 3.Facilities to re-process, store or flare the City’s renewable natural gas in the event of gas quality issues. The City would be required to pay fees in order to connection to the MidAmerican Energy natural gas pipeline including, but not necessarily limited to the following: City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 29 of 54 1.Contribution of Aid of Construction (CIAC) fee. 2.Startup support costs. 3. Three-year revenue reconciliation. 4.Rate tariffs may apply. MidAmerican Energy developed planning level proposals to establish the estimated costs for the City to inject renewable natural gas in to the MidAmerican Energy natural gas pipeline both at the WWTP and Landfill Sites. To make the NG pipeline connection at the WWTP Facility, MidAmerican Energy would need to install, and the City would pay for the following: 1.Four miles of 4-inch pipe from 4366 Napoleon Street to the outlet of Station 54 on Sioux Avenue. 2.Installation of odorizer tank, containment, building and foundation. Table 4 contains a summary of the MidAmerican Energy capital cost/NG pipeline connection fees and yearly maintenance fees that would be charged to the City for connecting RNG produced at the WWTP to the MidAmerican Energy NG pipeline. Table 4: MidAmerican Energy Fees – WWTP RNG Connection Iowa City Waste Water Annual Quantity Annual Charge Basic Service Charge – Rate 90T $ 1,315.00 12 $ 15,780.00 Transport Admin Charge $ 80.00 12 $ 960.00 Fixed Investment Charge $ 19,020.00 12 $ 228,240.00 Quality Monitoring Charge $ 1,055.00 12 $ 12,660.00 Maintenance Charge $ 40.00 12 $ 480.00 Commodity Charge $ 1.06875 213,525 $ 228,204.84 Odorant Charge $ 0.00019 213,525 $ 40.57 Total $ 486,365.41 3x Base Revenue Credit $ 1,459,096.24 Cost of Project $ 2,200,000.00 CIAC w/out Gross-up Tax $ 740,903.76 Gross-up Tax 21.07% $ 156,108.42 Total CIAC w/ Gross-up Tax $ 897,012.18 The initial capital cost/connection fee is $897,012.18, the yearly maintenance fee is $486,365.41. These are planning level costs based on estimated RNG volumes. These costs are based on the City injecting RNG at a rate of 7 MCFH. The actual yearly maintenance fee will be dependent on the actual volume of RNG injected into the MidAmerican NG pipeline. To make the NG pipeline connection at the Landfill, MidAmerican Energy would need to install, and the City would pay for the following: 1.Four miles of 4-inch pipe from 3900 Hebl Avenue to the outlet of the Melrose distribution regulator station. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 30 of 54 2.Installation of odorizer tank, containment, building and foundation. Table 5 contains a summary of the MidAmerican capital cost/NG pipeline connection fees and yearly maintenance fees that would be charged to the City for connecting RNG produced at the Landfill to the MidAmerican Energy NG pipeline. Table 5: MidAmerican Energy Fees – Landfill RNG Connection Iowa City Landfill Annual Quantity Annual Charge With Gross-up Basic Service Charge – Rate 90T $ 1,315.00 12 $ 15,780.00 Transport Admin Charge $ 80.00 12 $ 960.00 Fixed Investment Charge $ 15,560.00 12 $ 186,720.00 Quality Monitoring Charge $ 1,055.00 12 $ 12,660.00 Maintenance Charge $ 40.00 12 $ 480.00 Commodity Charge $ 0.15220 1,226,875 $ 186,730.38 Odorant Charge $ 0.00019 1,226,875 $ 233.11 Total $ 403,563.48 3x Base Revenue Credit $ 1,210,690.44 Cost of Project $ 1,800,000.00 CIAC w/out Gross-up Tax $ 589,309.56 Gross-up Tax 21.07% $ 124,167.52 Total CIAC w/ Gross-up Tax $ 713,477.08 The initial capital cost/connection fee is $713,477.08, the yearly maintenance fee is $403,563.48. These are planning level costs based on estimated RNG volumes. These costs are based on the City injecting RNG at a rate of 31.25 MCFH. The actual yearly maintenance fee will be dependent on the actual volume of RNG injected into the MidAmerican NG pipeline. The following is a listing of applicable details relating to potential sales of RNG for pipeline injection: •Every utility or purchasing entity has certain specification requirements for gas to be injected into their pipeline. The selling price for RNG will vary depending on contractual arrangements with the purchasing entity. USEPA’s Renewable Fuel Standard 2 (RFS2) program: This program is a potential source of revenue along with RNG sales for projects that result in verified transportation fuel. Note that if pipeline quality gas is made it can be delivered “off-site” to a third-party CNG facility for sale as transportation fuel. Although this program generally provides RNG projects with an alternate revenue stream (separate from the sale of the gas on a $/MMBtu basis), the duration of this program in the future is dependent upon federal policies that may change given the current administrative environment. Along with RFS2 program, other state specific programs can provide some potential revenue. Additionally, California’s Low Carbon Fuel Standard (LCFS) program may provide another viable option for additional revenue stream. This program is available for projects developed in any state, City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 31 of 54 as long as a verified physical pathway (pipeline connections) is identified between generator and purchaser. This is done by certified marketers with the expertise to perform and verify these routings as required by the program. Note that there are two options for installing a NG pipeline injection system: 1) The City purchases and installs a biogas conditioning system itself, 2) A third party entity installs, owns and operates the equipment onsite, and pays the City for a portion of the RNG sales. For the purposes of this study, it was assumed that the City would own and operate all biogas to RNG gas conditioning system equipment. MidAmerican Energy has stated that current natural gas pipeline regulations require that renewable natural gas produced in Iowa can only be sold to an entity that will consume the RNG in the state of Iowa. Alternatives were developed to establish the major equipment requirements and costs associated with the conversion of WWTP and Landfill biogas to RNG. Alternative 1a consists of RNG production at the WWTP and Alternative 1b consists of RNG production at the Landfill. The following is a summary of these two alternatives. Alternative 1a: WWTP NG Pipeline Injection The following is a summary of major Alternative 1a No Diversion scenario system components (equipment list is similar for both of the Alternative 1a diversion scenarios as well): 1. Biogas Conditioning Equipment: a. H2S Removal: Sorptive solid media vessel (Unison Solutions) b. Moisture Removal: Chiller system (Unison Solutions) c. Pressurization: Compressor included on the Unison upgrading skid. d. Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e. CO2 Removal: Membrane system/upgrading skid (Unison Solutions) f. O2 and N2 Removal: Not required. g. Low pressure blower to supply biogas to the inlet of the gas conditioning system 2. Site/Civil: a. Interconnecting digester gas and RNG piping. b. Concrete pad for gas conditioning system. c. Access drive for maintenance of the gas conditioning system. 3. Buildings/Structures: a. A new building for the electrical equipment and biogas blowers. b. Anaerobic digesters (1.4 MG total volume), hauled waste receiving station and sludge dewatering/storage facility is required at the WWTP for the Low Diversion scenario only. 4. Electricity: a. New electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. 5. NG Utility Connection: a. Connect to MidAmerican Energy NG piping system. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 32 of 54 b.MidAmerican Energy has agreed to route NG piping to the edge of the City’s property at the WWTP site. Table 6 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 1a. Table 6: Opinion of Probable Construction and O&M Costs for Alternative 1a Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $8,600,000 $1,353,000 1,500 Ton/Year Scenario $10,800,000 $1,815,000 Low Diversion Scenario $41,400,000 $3,112,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary for the No Diversion scenario. Figure 11 shows a conceptual layout of the Alternative 1a system components. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4NTS City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 34 of 54 Alternative 1b: Landfill NG Pipeline Injection The following is a summary of major Alternative 1b No Diversion scenario system components (equipment list is similar for both of the Alternative 1b diversion scenarios as well): 1.Biogas Conditioning Equipment: a.H2S Removal: Sorptive solid media vessel (Unison Solutions) b.Moisture Removal: Chiller system (Unison Solutions) c.Pressurization: Compressor included on the Unison upgrading skid. d. Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e.CO2 Removal: Membrane system/upgrading skid (Unison Solutions) f.O2 and N2 Removal: EQ pressure swing adsorption system (Guild Associates). g.Low pressure blower to supply biogas to the inlet of the gas conditioning system 2. Site/Civil: a. Interconnecting Landfill gas and RNG piping. b.Concrete pad for gas conditioning system. c.Access drive for maintenance of the gas conditioning system. 3. Buildings/Structures: a.A new building for the electrical equipment and biogas blowers. 4. Electricity: a.New electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. 5.NG Utility Connection: a.Connect to MidAmerican Energy NG piping system. b.MidAmerican Energy has agreed to route NG piping to the edge of the City’s property at the Landfill site. A detailed landfill gas quality analysis has not been performed on the Landfill gas. Therefore, assumptions were made with respect to the concentration of siloxanes and other biogas constituents. It is recommended that the City perform a detailed analysis on its Landfill biogas to confirm the assumptions made in this TM. It is recommended that the City evaluate ways of reducing the amount of siloxanes that enter the Landfill. Refer to Attachments J and K for detailed information on the proposed Unison Solutions gas conditioning system. Table 7 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 1b. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 35 of 54 Table 7: Opinion of Probable Construction and O&M Costs for Alternative 1b Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $29,200,000 $2,292,000 1,500 Ton/Year Scenario $29,000,000 $2,282,000 Low Diversion Scenario $28,000,000 $2,200,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary. Figure 12 shows a conceptual layout of the Alternative 1b system components. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 37 of 54 Biogas Utilization Alternative 2: Electricity Generation Producing electricity from biogas is common in the US. Electricity can be produced by using biogas as a fuel source in an internal combustion engine or a gas turbine. The following is an overview of these two electricity generation technologies. Gas Turbines Gas turbines are a technology option typically utilized in biogas projects in which biogas flow rates exceed approximately 1,600 SCFM of available gas. This is due to the economies of scale available for this technology. The cost per kW of generating capacity drops as the size of the gas turbine increases, and the electric generation efficiency generally improves as well. However, the economics, and also the physical conversion efficiency of gas turbines drop substantially when running at partial load. An advantage of gas turbines is that they are more resistant to some forms of corrosion damage than internal combustion engines. Gas turbines also have lower nitrogen oxides (NOx) emission rates. Additionally, gas turbines are relatively compact and have relatively low O&M costs as compared with internal combustion engines. However, gas turbines have strict requirements on siloxane thresholds, and pretreatment costs may be even higher compared to engine generator technologies. Engine Generators Reciprocating engine generators may require some pretreatment processes and specific O&M procedures to address the contaminants commonly found in biogas. Control systems, switchgear and a step-up transformer are also required to increase generated voltage and maintain synchronization to the local electric transmission lines. Major costs associated with engine-based biogas projects are identified below: •Capital Cost: Capital costs are dependent upon equipment selection, pretreatment requirements and interconnection with purchasing entity. It is important to note that each manufacturer typically performs their own analysis of feed gas prior to providing a warranty for their installations. •Operations and Maintenance (O&M) Cost: Routine maintenance on the engine generators such as oil changes, filter replacements and general tuning are important to continue to maximize electricity output and revenue. These costs are usually modeled on a $/kWh basis. •Overhaul Cost (typical): Every 40,000-45,000 operational hours (approximately every 5 years), the engines require a complete overhaul, restoring the engines to like-new condition. There may be situations in which more biogas is being produced than can be utilized by the gas turbines or engine generators installed, in which case the excess biogas would be flared. The amount of biogas produced at the WWTP is near the low end for use in an engine generator. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 38 of 54 Connection to the Electric Utility The generated electricity can be sold to local utility companies and to non-local companies by means of “wheeling” power over the shared grid. Commonly, electric utility companies will pay based on contractual agreement with the electricity seller. The payment is generally quantified in terms of “avoided cost” – cost of electricity that the utility would have to produce. These avoided costs tend to fluctuate and can vary significantly based on various factors, such as plant capacity, on-site loads, or excess generation, and type of energy source the utility uses for electricity production. Interconnection with the local utility company (or other purchasing entity) is required for all electrical generation projects. These costs are generally based on the scale of the project and arrangements with the electricity purchasing entity. These interconnection costs may vary significantly based on arrangements with the purchasing entity. Renewable Energy Credits (RECs) and other similar state specific incentive programs are additional sources of potential revenue from sales of electricity generated by biogas. MidAmerican Energy is the electric utility that provides power to the Landfill. MidAmerican Energy has indicated that it will allow the City to connect to its electrical grid, and presented the following alternatives: 1. Net metering (i.e. bi-directional metering) a. Electricity sent to the utility would be a credit. 2. Use onsite only (Level 3) 3. Interconnect to grid and deliver for a fee. 4. Tariff Rate QF 5. Market Transaction In order to establish costs and fees associated with connection to the MidAmerican electrical grid, the City would need to complete a Levels 2-4 Interconnection Request Application Form and submit it to MidAmerican Energy. A copy of this form is included in Attachment I. The submission fee is $1,000 plus $2 per KVA. MidAmerican Energy would use the information on this form to establish the required upgrades to its system in order to accommodate the additional load from the City. This detailed evaluation would be required if the City decides to proceed with electrical generation as the selected alternative. For the purposes of this study, MidAmerican Energy was asked for planning level connection costs and fees. MidAmerican Energy indicated that several upgrades to its existing electrical substation equipment would be required for the City to connect to the electrical grid. Equipment upgrades would include, but are not necessarily limited to the following: substation relays and feeder breakers, direct transfer trip, fiber optic communications, voltage control equipment, and utility remote terminal unit addition. MidAmerican Energy would construct these upgrades and the City would be required to cover the costs. The system upgrades costs would likely fall in the $500,000 to $1,000,000 range according to MidAmerican. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 39 of 54 Eastern Iowa Light and Power (REC) is the electricity utility that provides power to the WWTP. Eastern Iowa Light and Power has indicated that it will allow the City to connect to the electrical grid. A detailed study would be required if a WWTP electricity generation alternative is selected in the future. Alternatives for generating electricity at the Landfill and WWTP were evaluated. A gas turbine option and engine generator option were evaluated for each facility. The following are descriptions of these alternatives. Alternative 2a: WWTP Biogas Electricity Generation ALTERNATIVE 2A-1: WWTP ELECTRICITY GENERATION - MICROTURBINES The following is a summary of major Alternative 2a-1 No Diversion scenario system components (equipment list is similar for both of the Alternative 2a-1 diversion scenarios as well): 1.Electricity Generation Equipment (Model/size/number of units shown is for the No Diversion scenario only): a.Three Microturbines b. Manufacturer/Model: Capstone/C65 c.Size: 65 kW each, 195 kW total 2.Biogas Conditioning Equipment: a.H2S Removal: Not required per Capstone. b.Moisture Removal: Chiller system (Unison Solutions) c.Pressurization: Compressor included as part of Chiller system (Unison Solutions). d.Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e.CO2 Removal: Not required per Capstone. f.O2 and N2 Removal: Not required per Capstone. g.Low pressure blower to supply biogas to the inlet of the gas conditioning system. 3.Site/Civil: a.Piping to interconnect the digesters and the gas turbines. b.Concrete pad for gas conditioning system. c.Access drive for maintenance of the gas conditioning system. 4. Buildings/Structures: a.A new building for the microturbines and biogas blowers. b.Anaerobic digesters (1.4 MG total volume), hauled waste receiving station and sludge dewatering/storage facility is required at the WWTP (Low Diversion scenario only). 5. Electricity Equipment: a.Electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. b.Electrical equipment associated with microturbines. 6.Electric Utility Connection: a.Connect to REC electrical grid. b.Costs associated with upgrades to the REC substation. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 40 of 54 Refer to Attachment O for additional information on the proposed microturbines for Alternative 2a-1. Table 8 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 2a-1. Table 8: Opinion of Probable Construction and O&M Costs for Alternative 2a-1 Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $9,400,000 $901,000 1,500 Ton/Year Scenario $11,800,000 $1,209,000 Low Diversion Scenario $42,800,000 $2,205,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary. Figure 13 shows a conceptual layout of the Alternative 2a-1 system components. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4NTS City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 42 of 54 ALTERNATIVE 2A-2: WWTP ELECTRICITY GENERATION – ENGINE GENERATORS The following is a summary of major Alternative 2a-2 No Diversion scenario system components (equipment list is similar for both of the Alternative 2a-2 diversion scenarios as well): 1.Electricity Generation Equipment (Model/size/number of units shown is for the No Diversion scenario only): a.One Engine Generator b. Manufacturer/Model: MTU/12V400GS c.Size: 3495 kW 2.Biogas Conditioning Equipment: a.H2S Removal: Sorptive media vessel (Unison Solutions) b.Moisture Removal: Chiller system (Unison Solutions) c.Pressurization: Compressor included as part of Chiller system (Unison Solutions) d.Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e.CO2 Removal: Not required per MTU. f.O2 and N2 Removal: Not required per MTU. g. Low pressure blower to supply biogas to the inlet of the gas conditioning system. 3.Site/Civil: a.Piping to interconnect the digesters and the engine generators. b.Concrete pad for gas conditioning system. c.Access drive for maintenance of the gas conditioning system. 4. Buildings/Structures: a.A new building for the engine generators and biogas blowers. b.Anaerobic digesters (1.4 MG total volume), hauled waste receiving station and sludge dewatering/storage facility is required at the WWTP (Low Diversion scenario only). 5.Electricity Equipment: a.Electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. b.Electrical equipment associated with engine generators. 6.Electric Utility Connection: a.Connect to REC electrical grid. b.Costs associated with upgrades to the REC substation. Refer to Attachment M for additional information on the proposed MTU engine generators for Alternative 2a-2. Table 9 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 2a-2. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 43 of 54 Table 9: Opinion of Probable Construction and O&M Costs for Alternative 2a-2 Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $13,500,000 $1,067,000 1,500 Ton/Year Scenario $17,000,000 $1,432,000 Low Diversion Scenario $50,000,000 $2,538,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary. Figure 14 shows a conceptual layout of the Alternative 2a-1 system components. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4NTS City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 45 of 54 Alternative 2b: Landfill Biogas Electricity Generation ALTERNATIVE 2B-1: LANDFILL ELECTRICITY GENERATION - MICROTURBINES The following is a summary of major Alternative 2b-1 No Diversion scenario system components (equipment list is similar for both of the Alternative 2b-1 diversion scenarios as well): 1.Electricity Generation Equipment (Model/size/number of units shown is for the No Diversion scenario only): a.Two Microturbines b. Manufacturer/Model: Capstone/CS1000S c.Size: 1,000 kW each, 2,000 kW total 2. Biogas Conditioning Equipment: a.H2S Removal: Not required per Capstone. b.Moisture Removal: Chiller system (Unison Solutions) c.Pressurization: Not required. d.Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e.CO2 Removal: Not required per Capstone. f.O2 and N2 Removal: Not required per Capstone. g.Low pressure blower to supply biogas to the inlet of the gas conditioning system. 3. Site/Civil: a.Piping to interconnect the Landfill biogas and the gas turbines. b.Concrete pad for gas conditioning system. c.Access drive for maintenance of the gas conditioning system. 4. Buildings/Structures: a.New building for the microturbines and biogas blowers. 5.Electricity Equipment: a.Electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. b.Electrical equipment associated with microturbines. 6.Electric Utility Connection: a.Connect to MidAmerican Energy electrical grid. b.Costs associated with upgrades to the MidAmerican Energy substation. Refer to Attachment O for additional information on the proposed microturbines for Alternative 2b-1. Table 10 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 2b-1. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 46 of 54 Table 10: Opinion of Probable Construction and O&M Costs for Alternative 2b-1 Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $12,200,000 $775,000 1,500 Ton/Year Scenario $12,100,000 $772,000 Low Diversion Scenario $11,700,000 $744,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary. Figure 15 shows a conceptual layout of the Alternative 2b-1 system components. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 48 of 54 ALTERNATIVE 2B-2: LANDFILL ELECTRICITY GENERATION – ENGINE GENERATORS The following is a summary of major Alternative 2b-2 No Diversion scenario system components (equipment list is similar for both of the Alternative 2b-2 diversion scenarios as well): 1. Electricity Generation Equipment (Model/size/number of units shown is for the No Diversion scenario only): a. Three Engine Generators b. Manufacturer/Model: MTU/12V4000AL32FB c.Size: 1,115 kW each, 3,345 kW total 2.Biogas Conditioning Equipment: a.H2S Removal: Sorptive media vessel (Unison Solutions) b.Moisture Removal: Chiller system (Unison Solutions) c.Pressurization: Not required. d.Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e.CO2 Removal: Not required per MTU. f.O2 and N2 Removal: Not required per MTU. g.Low pressure blower to supply biogas to the inlet of the gas conditioning system. 3. Site/Civil: a.Piping to interconnect the Landfill biogas and the gas turbines. b.Concrete pad for gas conditioning system. c.Access drive for maintenance of the gas conditioning system. 4. Buildings/Structures: a.New building for the engine generators and biogas blowers. 5.Electricity Equipment: a.Electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. b.Electrical equipment associated with engine generators. 6.Electric Utility Connection: a. Connection to MidAmerican Energy electrical grid. b.Costs associated with upgrades to the MidAmerican Energy substation. A detailed landfill gas quality analysis has not been performed on the Landfill gas. Therefore, assumptions were made with respect to the concentration of siloxanes and other biogas constituents. It is recommended that the City perform a detailed analysis on its Landfill biogas to confirm the assumptions made in this TM. It is recommended that the City evaluate ways of reducing the amount of siloxanes that enter the Landfill. Refer to Attachment N for additional information on the proposed MTU engine generators for Alternative 2b-2. Table 11 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 2b-2. City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 49 of 54 Table 11: Opinion of Probable Construction and O&M Costs for Alternative 2b-2 Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $20,500,000 $1,288,000 1,500 Ton/Year Scenario $20,300,000 $1,282,000 Low Diversion Scenario $19,600,000 $1,236,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary. Figure 16 shows a conceptual layout of the Alternative 2b-2 system components. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4 City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 51 of 54 Note that there are two options for installing a biogas to electricity system: 1) The City purchases and installs a biogas to electricity system itself, 2) A third party entity installs, owns and operates the equipment onsite, and pays the City for a portion of the electricity sales. For the purposes of this study, it was assumed that the City would own and operate all biogas electricity generation equipment. Biogas Utilization Alternative 3: Natural Gas Replacement The WWTP currently uses natural gas for heating buildings. The digester complex and solids handling areas are heated using the boiler/cogeneration system, which operates on biogas from the digester, supplemented by natural gas. Biogas Utilization Alternative 3 involves conditioning the WWTP biogas to natural gas quality in order to offset the purchase of natural gas in existing processes within the WWTP. Alternative 3 is similar to Alternative 1A, except a connection to the MidAmerican pipeline is not made; therefore, there are no MidAmerican pipeline connection fees or yearly maintenance fees. The WWTP currently uses an average of 65,400 BTU/min (68.8 scfm) of NG. As a comparison, if the biogas currently produced at the WWTP was converted to RNG, the quantity would be 44,000 BTU/day (46.5 scfm). By the year 2035, the WWTP will have to potential to produce the equivalent of 67,000 BTU/day (70.5 scfm) RNG. Alternative 3: WWTP NG Replacement The following is a summary of major Alternative 3 No Diversion scenario system components (equipment list is similar for both of the Alternative 3 diversion scenarios as well): 1. Biogas Conditioning Equipment: a. H2S Removal: Sorptive solid media vessel (Unison Solutions) b. Moisture Removal: Chiller system (Unison Solutions) c. Pressurization: Compressor included on the Unison upgrading skid. d. Siloxane/VOC Removal: Sorptive solid media vessel (Unison Solutions) e. CO2 Removal: Membrane system/upgrading skid (Unison Solutions) f. O2 and N2 Removal: Not required. g. Low pressure blower to supply biogas to the inlet of the gas conditioning system 2. Site/Civil: a. Interconnecting digester gas and RNG piping. b. Concrete pad for gas conditioning system. c. Access drive for maintenance of the gas conditioning system. 3. Buildings/Structures: a. A new building for the electrical equipment and biogas blowers. b. Anaerobic digesters (1.4 MG total volume), hauled waste receiving station and sludge dewatering/storage facility is required at the WWTP (Low Diversion scenario only). 4. Electricity: a. New electrical equipment (e.g. transformer, switchgear, MCC etc.) for gas conditioning system. 5. NG Utility Connection: City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 52 of 54 a.Connect to MidAmerican Energy NG piping system. b.MidAmerican Energy has agreed to route NG piping to the edge of the City’s property at the WWTP site. Figure 17 shows a conceptual layout of the Alternative 3 system components. Table 12 summarizes the Opinion of Probable Construction and O&M Costs for Alternative 3. Table 12: Opinion of Probable Construction and O&M Costs for Alternative 3 Opinion of Probable Construction Costs Opinion of Probable Annual O&M Costs No Diversion Scenario $7,700,000 $867,000 1,500 Ton/Year Scenario $9,700,000 $1,163,000 Low Diversion Scenario $39,800,000 $2,136,000 Refer to Attachment Q for a detailed opinion of probable construction cost and O&M cost summary. Refer to Attachment J for detailed information on the proposed Unison Solutions equipment for Alternative 3. PRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7ISSUEDATEDESCRIPTION12345678DCBASHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4WaterTreatment/SofteningPRELIMINARYNOT FOR CONSTRUCTION OR RECORDINGRR01"2"SCALEFILENAME 1 2 3 4 5 6 7SHEET 1/4" = 1'-0"MULTIPLE STRUCTURE NAME10211811Gillette Pump Station No.1ARCHITECTURE PLACEHOLDERPROJECT NAMECity of GillettePump Station No.1 UpgradeAlternative 4NTS City of Iowa City | CAAP Methane Feasibility Study Biogas Utilization Analysis TM Page 54 of 54 Biogas Utilization Alternatives - SROI Analysis The capital and O&M costs presented in this TM will be used as part of the Sustainable Return on Investment Analysis (SROI), which is presented in a separate TM. To simplify the SROI analysis, it was assumed that engine generators will be used for the electricity generation alternatives instead of microturbines. Therefore, Alternatives 2a-1 and 2b-1 will not be carried forward into the SROI analysis. It is recommended that the electricity generation technology be evaluated in greater detail if the City decides to proceed with one of the electricity generation biogas utilization alternatives. Attachment A Baseline Iowa City LandGEM Model Reports JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Summary Report Landfill Name or Identifier: City of Iowa City Landfill - Baseline Date: First-Order Decomposition Rate Equation: Where, QCH4 = annual methane generation in the year of the calculation (m 3/year)i = 1-year time increment Mi = mass of waste accepted in the ith year (Mg) n = (year of the calculation) - (initial year of waste acceptance)j = 0.1-year time increment k = methane generation rate (year-1)Lo = potential methane generation capacity (m3/Mg) tij = age of the jth section of waste mass Mi accepted in the ith year (decimal years, e.g., 3.2 years) LandGEM is considered a screening tool — the better the input data, the better the estimates. Often, there are limitations with the available data regarding waste quantity and composition, variation in design and operating practices over time, and changes occurring over time that impact the emissions potential. Changes to landfill operation, such as operating under wet conditions through leachate recirculation or other liquid additions, will result in generating more gas at a faster rate. Defaults for estimating emissions for this type of operation are being developed to include in LandGEM along with defaults for convential landfills (no leachate or liquid additions) for developing emission inventories and determining CAA applicability. Refer to the Web site identified above for future updates. Wednesday, April 8, 2020 LandGEM is based on a first-order decomposition rate equation for quantifying emissions from the decomposition of landfilled waste in municipal solid waste (MSW) landfills. The software provides a relatively simple approach to estimating landfill gas emissions. Model defaults are based on empirical data from U.S. landfills. Field test data can also be used in place of model defaults when available. Further guidance on EPA test methods, Clean Air Act (CAA) regulations, and other guidance regarding landfill gas emissions and control technology requirements can be found at http://www.epa.gov/ttnatw01/landfill/landflpg.html. Description/Comments: Baseline model. K value consistent with 2010 SCS "Gas Recovery Modeling Report". Lo value updated based on DOC calculations using 2017 Iowa Statewide Waste Characterization Study (Iowa City Landfill values) instead of IPCC regional default data. About LandGEM: REPORT - 1 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Input Review LANDFILL CHARACTERISTICS Landfill Open Year 1972 Landfill Closure Year (with 80-year limit)2044 Actual Closure Year (without limit)2044 Have Model Calculate Closure Year?No Waste Design Capacity 7,710,000 short tons MODEL PARAMETERS Methane Generation Rate, k 0.061 year -1 Potential Methane Generation Capacity, Lo 104 m 3/Mg NMOC Concentration 600 ppmv as hexane Methane Content 50 % by volume GASES / POLLUTANTS SELECTED Gas / Pollutant #1:Total landfill gas Gas / Pollutant #2:Methane Gas / Pollutant #3:Carbon dioxideGas / Pollutant #4:NMOC WASTE ACCEPTANCE RATES (Mg/year) (short tons/year) (Mg) (short tons) 1972 66,364 73,000 0 0 1973 66,695 73,365 66,364 73,000 1974 67,029 73,732 133,059 146,365 1975 67,364 74,100 200,088 220,0971976 67,701 74,471 267,452 294,1971977 68,039 74,843 335,153 368,6681978 68,380 75,218 403,192 443,5121979 66,014 72,615 471,572 518,7291980 60,002 66,002 537,586 591,3441981 59,825 65,808 597,587 657,3461982 67,618 74,380 657,413 723,1541983 72,365 79,602 725,031 797,5341984 74,455 81,900 797,397 877,1361985 70,426 77,469 871,851 959,036 1986 71,163 78,279 942,277 1,036,505 1987 71,519 78,670 1,013,440 1,114,784 1988 71,876 79,064 1,084,959 1,193,455 1989 71,271 78,398 1,156,835 1,272,518 1990 84,210 92,632 1,228,105 1,350,916 1991 70,946 78,041 1,312,316 1,443,547 1992 68,367 75,204 1,383,262 1,521,588 1993 70,418 77,460 1,451,629 1,596,792 1994 71,991 79,190 1,522,047 1,674,252 1995 73,323 80,655 1,594,038 1,753,442 1996 67,817 74,598 1,667,361 1,834,098 1997 73,114 80,425 1,735,178 1,908,696 1998 80,758 88,834 1,808,292 1,989,121 1999 68,146 74,960 1,889,050 2,077,955 2000 70,901 77,991 1,957,196 2,152,9162001 81,966 90,162 2,028,097 2,230,9062002 93,731 103,104 2,110,062 2,321,0682003 94,168 103,585 2,203,793 2,424,1732004 98,268 108,095 2,297,961 2,527,7572005 103,051 113,356 2,396,229 2,635,8522006 104,027 114,430 2,499,280 2,749,2082007 112,813 124,094 2,603,308 2,863,6392008 108,831 119,714 2,716,120 2,987,7322009 109,711 120,682 2,824,951 3,107,4462010 109,622 120,584 2,934,663 3,228,129 2011 106,571 117,228 3,044,284 3,348,713 Year Waste Accepted Waste-In-Place REPORT - 2 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 WASTE ACCEPTANCE RATES (Continued) (Mg/year) (short tons/year) (Mg) (short tons)2012 101,641 111,805 3,150,855 3,465,9412013 101,313 111,445 3,252,496 3,577,7462014 104,950 115,445 3,353,810 3,689,1902015 112,447 123,692 3,458,760 3,804,636 2016 115,341 126,875 3,571,207 3,928,328 2017 124,643 137,107 3,686,548 4,055,203 2018 127,870 140,657 3,811,191 4,192,310 2019 115,989 127,587 3,939,061 4,332,967 2020 116,515 128,167 4,055,049 4,460,554 2021 117,044 128,748 4,171,564 4,588,721 2022 117,575 129,333 4,288,608 4,717,469 2023 118,109 129,920 4,406,184 4,846,802 2024 118,645 130,510 4,524,293 4,976,722 2025 119,184 131,102 4,642,938 5,107,232 2026 119,725 131,698 4,762,122 5,238,334 2027 120,269 132,295 4,881,847 5,370,032 2028 120,815 132,896 5,002,116 5,502,327 2029 121,363 133,499 5,122,930 5,635,223 2030 121,914 134,105 5,244,293 5,768,7232031 122,467 134,714 5,366,207 5,902,8282032 123,023 135,326 5,488,675 6,037,5422033 123,582 135,940 5,611,698 6,172,8682034 124,143 136,557 5,735,280 6,308,8082035 124,706 137,177 5,859,423 6,445,3652036 125,273 137,800 5,984,129 6,582,5422037 125,841 138,425 6,109,402 6,720,3422038 126,413 139,054 6,235,243 6,858,7672039 126,987 139,685 6,361,656 6,997,8212040 127,563 140,319 6,488,642 7,137,507 2041 128,142 140,956 6,616,205 7,277,826 2042 128,724 141,596 6,744,347 7,418,782 2043 129,308 142,239 6,873,071 7,560,378 2044 6,712 7,383 7,002,379 7,702,617 2045 0 0 7,009,091 7,710,000 2046 0 0 7,009,091 7,710,000 2047 0 0 7,009,091 7,710,000 2048 0 0 7,009,091 7,710,000 2049 0 0 7,009,091 7,710,000 2050 0 0 7,009,091 7,710,0002051 0 0 7,009,091 7,710,000 Year Waste Accepted Waste-In-Place REPORT - 3 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Pollutant Parameters Concentration ConcentrationCompound(ppmv)Molecular Weight (ppmv)Molecular WeightTotal landfill gas 0.00Methane16.04Carbon dioxide 44.01NMOC4,000 86.181,1,1-Trichloroethane (methyl chloroform) - HAP 0.48 133.411,1,2,2-Tetrachloroethane - HAP/VOC 1.1 167.85 1,1-Dichloroethane (ethylidene dichloride) - HAP/VOC 2.4 98.97 1,1-Dichloroethene (vinylidene chloride) - HAP/VOC 0.20 96.94 1,2-Dichloroethane (ethylene dichloride) - HAP/VOC 0.41 98.96 1,2-Dichloropropane (propylene dichloride) - HAP/VOC 0.18 112.99 2-Propanol (isopropyl alcohol) - VOC 50 60.11 Acetone 7.0 58.08 Acrylonitrile - HAP/VOC 6.3 53.06 Benzene - No or Unknown Co-disposal - HAP/VOC 1.9 78.11Benzene - Co-disposal - HAP/VOC 11 78.11Bromodichloromethane - VOC 3.1 163.83Butane - VOC 5.0 58.12 Carbon disulfide - HAP/VOC 0.58 76.13 Carbon monoxide 140 28.01 Carbon tetrachloride - HAP/VOC 4.0E-03 153.84 Carbonyl sulfide - HAP/VOC 0.49 60.07 Chlorobenzene - HAP/VOC 0.25 112.56 Chlorodifluoromethane 1.3 86.47 Chloroethane (ethyl chloride) - HAP/VOC 1.3 64.52 Chloroform - HAP/VOC 0.03 119.39 Chloromethane - VOC 1.2 50.49 Dichlorobenzene - (HAP for para isomer/VOC)0.21 147 Dichlorodifluoromethane 16 120.91 Dichlorofluoromethane - VOC 2.6 102.92 Dichloromethane (methylene chloride) - HAP 14 84.94Dimethyl sulfide (methyl sulfide) - VOC 7.8 62.13 Ethane 890 30.07 Ethanol - VOC 27 46.08 Gas / Pollutant Default Parameters:PollutantsUser-specified Pollutant Parameters:GasesREPORT - 4 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Pollutant Parameters (Continued) Concentration ConcentrationCompound(ppmv)Molecular Weight (ppmv)Molecular Weight Ethyl mercaptan (ethanethiol) - VOC 2.3 62.13Ethylbenzene - HAP/VOC 4.6 106.16Ethylene dibromide - HAP/VOC 1.0E-03 187.88 Fluorotrichloromethane - VOC 0.76 137.38 Hexane - HAP/VOC 6.6 86.18 Hydrogen sulfide 36 34.08 Mercury (total) - HAP 2.9E-04 200.61 Methyl ethyl ketone - HAP/VOC 7.1 72.11 Methyl isobutyl ketone - HAP/VOC 1.9 100.16 Methyl mercaptan - VOC 2.5 48.11 Pentane - VOC 3.3 72.15 Perchloroethylene (tetrachloroethylene) - HAP 3.7 165.83 Propane - VOC 11 44.09 t-1,2-Dichloroethene - VOC 2.8 96.94 Toluene - No or Unknown Co-disposal - HAP/VOC 39 92.13Toluene - Co-disposal - HAP/VOC 170 92.13Trichloroethylene (trichloroethene) - HAP/VOC 2.8 131.40 Vinyl chloride - HAP/VOC 7.3 62.50 Xylenes - HAP/VOC 12 106.16 User-specified Pollutant Parameters:Gas / Pollutant Default Parameters:PollutantsREPORT - 5 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Graphs 0.000E+00 5.000E+03 1.000E+04 1.500E+04 2.000E+04 2.500E+04 3.000E+04 3.500E+04 EmissionsYear Megagrams Per Year Total landfill gas Methane Carbon dioxide NMOC 0.000E+00 5.000E+06 1.000E+07 1.500E+07 2.000E+07 2.500E+07 3.000E+07 EmissionsYear Cubic Meters Per Year Total landfill gas Methane Carbon dioxide NMOC 0.000E+00 2.000E+02 4.000E+02 6.000E+02 8.000E+02 1.000E+03 1.200E+03 1.400E+03 1.600E+03 1.800E+03 EmissionsYear User-specified Unit (units shown in legend below) Total landfill gas (av ft^3/min)Methane (av ft^3/min) Carbon dioxide (av ft^3/min)NMOC (av ft^3/min) REPORT - 6 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)1972 0 00000 1973 1.023E+03 8.193E+05 5.505E+01 2.733E+02 4.097E+05 2.753E+01 1974 1.991E+03 1.594E+06 1.071E+02 5.318E+02 7.972E+05 5.356E+01 1975 2.907E+03 2.328E+06 1.564E+02 7.764E+02 1.164E+06 7.819E+01 1976 3.773E+03 3.021E+06 2.030E+02 1.008E+03 1.511E+06 1.015E+02 1977 4.594E+03 3.679E+06 2.472E+02 1.227E+03 1.839E+06 1.236E+02 1978 5.371E+03 4.301E+06 2.890E+02 1.435E+03 2.150E+06 1.445E+02 1979 6.108E+03 4.891E+06 3.286E+02 1.631E+03 2.445E+06 1.643E+02 1980 6.764E+03 5.416E+06 3.639E+02 1.807E+03 2.708E+06 1.820E+02 1981 7.289E+03 5.837E+06 3.922E+02 1.947E+03 2.918E+06 1.961E+02 1982 7.780E+03 6.230E+06 4.186E+02 2.078E+03 3.115E+06 2.093E+02 1983 8.362E+03 6.696E+06 4.499E+02 2.234E+03 3.348E+06 2.249E+02 1984 8.983E+03 7.193E+06 4.833E+02 2.399E+03 3.597E+06 2.417E+02 1985 9.599E+03 7.687E+06 5.165E+02 2.564E+03 3.843E+06 2.582E+02 1986 1.012E+04 8.101E+06 5.443E+02 2.702E+03 4.051E+06 2.722E+02 1987 1.062E+04 8.501E+06 5.712E+02 2.836E+03 4.250E+06 2.856E+021988 1.109E+04 8.881E+06 5.967E+02 2.962E+03 4.440E+06 2.983E+021989 1.154E+04 9.242E+06 6.210E+02 3.083E+03 4.621E+06 3.105E+021990 1.196E+04 9.575E+06 6.434E+02 3.194E+03 4.788E+06 3.217E+021991 1.255E+04 1.005E+07 6.752E+02 3.352E+03 5.024E+06 3.376E+021992 1.290E+04 1.033E+07 6.941E+02 3.446E+03 5.165E+06 3.470E+021993 1.319E+04 1.056E+07 7.097E+02 3.523E+03 5.281E+06 3.548E+021994 1.350E+04 1.081E+07 7.261E+02 3.605E+03 5.403E+06 3.631E+021995 1.381E+04 1.106E+07 7.429E+02 3.688E+03 5.528E+06 3.714E+021996 1.412E+04 1.131E+07 7.597E+02 3.772E+03 5.654E+06 3.799E+021997 1.433E+04 1.148E+07 7.710E+02 3.828E+03 5.738E+06 3.855E+02 1998 1.461E+04 1.170E+07 7.861E+02 3.902E+03 5.849E+06 3.930E+02 1999 1.499E+04 1.200E+07 8.065E+02 4.004E+03 6.002E+06 4.033E+02 2000 1.515E+04 1.213E+07 8.153E+02 4.048E+03 6.067E+06 4.077E+02 2001 1.535E+04 1.229E+07 8.259E+02 4.100E+03 6.146E+06 4.129E+02 2002 1.571E+04 1.258E+07 8.450E+02 4.195E+03 6.288E+06 4.225E+02 2003 1.622E+04 1.299E+07 8.728E+02 4.333E+03 6.495E+06 4.364E+02 2004 1.671E+04 1.338E+07 8.992E+02 4.464E+03 6.692E+06 4.496E+02 2005 1.724E+04 1.380E+07 9.275E+02 4.605E+03 6.902E+06 4.638E+02 2006 1.781E+04 1.426E+07 9.581E+02 4.757E+03 7.130E+06 4.791E+02 2007 1.836E+04 1.470E+07 9.877E+02 4.904E+03 7.350E+06 4.939E+02 2008 1.901E+04 1.522E+07 1.023E+03 5.078E+03 7.612E+06 5.114E+02 2009 1.956E+04 1.567E+07 1.053E+03 5.226E+03 7.833E+06 5.263E+02 2010 2.010E+04 1.609E+07 1.081E+03 5.368E+03 8.047E+06 5.407E+02 2011 2.060E+04 1.649E+07 1.108E+03 5.502E+03 8.247E+06 5.541E+02 2012 2.102E+04 1.683E+07 1.131E+03 5.616E+03 8.417E+06 5.656E+022013 2.135E+04 1.709E+07 1.148E+03 5.702E+03 8.547E+06 5.742E+022014 2.165E+04 1.733E+07 1.165E+03 5.782E+03 8.666E+06 5.823E+022015 2.198E+04 1.760E+07 1.183E+03 5.872E+03 8.801E+06 5.914E+022016 2.242E+04 1.795E+07 1.206E+03 5.987E+03 8.975E+06 6.030E+022017 2.287E+04 1.831E+07 1.230E+03 6.108E+03 9.156E+06 6.152E+022018 2.344E+04 1.877E+07 1.261E+03 6.260E+03 9.383E+06 6.305E+022019 2.402E+04 1.923E+07 1.292E+03 6.416E+03 9.617E+06 6.462E+022020 2.439E+04 1.953E+07 1.312E+03 6.514E+03 9.764E+06 6.561E+022021 2.474E+04 1.981E+07 1.331E+03 6.609E+03 9.906E+06 6.656E+02 Year Total landfill gas Methane REPORT - 7 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2022 2.508E+04 2.008E+07 1.349E+03 6.699E+03 1.004E+07 6.747E+02 2023 2.541E+04 2.035E+07 1.367E+03 6.787E+03 1.017E+07 6.836E+02 2024 2.573E+04 2.060E+07 1.384E+03 6.872E+03 1.030E+07 6.921E+02 2025 2.603E+04 2.085E+07 1.401E+03 6.954E+03 1.042E+07 7.004E+02 2026 2.633E+04 2.108E+07 1.417E+03 7.033E+03 1.054E+07 7.083E+02 2027 2.662E+04 2.132E+07 1.432E+03 7.110E+03 1.066E+07 7.161E+02 2028 2.690E+04 2.154E+07 1.447E+03 7.185E+03 1.077E+07 7.236E+02 2029 2.717E+04 2.176E+07 1.462E+03 7.257E+03 1.088E+07 7.309E+02 2030 2.743E+04 2.197E+07 1.476E+03 7.328E+03 1.098E+07 7.380E+02 2031 2.769E+04 2.217E+07 1.490E+03 7.396E+03 1.109E+07 7.449E+02 2032 2.794E+04 2.237E+07 1.503E+03 7.463E+03 1.119E+07 7.516E+02 2033 2.818E+04 2.257E+07 1.516E+03 7.528E+03 1.128E+07 7.581E+02 2034 2.842E+04 2.276E+07 1.529E+03 7.591E+03 1.138E+07 7.645E+02 2035 2.865E+04 2.294E+07 1.542E+03 7.653E+03 1.147E+07 7.708E+02 2036 2.888E+04 2.313E+07 1.554E+03 7.714E+03 1.156E+07 7.769E+02 2037 2.910E+04 2.330E+07 1.566E+03 7.773E+03 1.165E+07 7.829E+022038 2.932E+04 2.348E+07 1.577E+03 7.832E+03 1.174E+07 7.887E+022039 2.953E+04 2.365E+07 1.589E+03 7.889E+03 1.182E+07 7.945E+022040 2.974E+04 2.382E+07 1.600E+03 7.945E+03 1.191E+07 8.002E+022041 2.995E+04 2.398E+07 1.611E+03 8.000E+03 1.199E+07 8.057E+022042 3.015E+04 2.415E+07 1.622E+03 8.055E+03 1.207E+07 8.112E+022043 3.035E+04 2.431E+07 1.633E+03 8.108E+03 1.215E+07 8.166E+022044 3.055E+04 2.446E+07 1.644E+03 8.161E+03 1.223E+07 8.219E+022045 2.885E+04 2.310E+07 1.552E+03 7.705E+03 1.155E+07 7.760E+022046 2.714E+04 2.173E+07 1.460E+03 7.249E+03 1.087E+07 7.301E+022047 2.553E+04 2.045E+07 1.374E+03 6.820E+03 1.022E+07 6.869E+02 2048 2.402E+04 1.924E+07 1.293E+03 6.417E+03 9.618E+06 6.463E+02 2049 2.260E+04 1.810E+07 1.216E+03 6.037E+03 9.049E+06 6.080E+02 2050 2.126E+04 1.703E+07 1.144E+03 5.680E+03 8.514E+06 5.720E+02 2051 2.001E+04 1.602E+07 1.076E+03 5.344E+03 8.010E+06 5.382E+02 2052 1.882E+04 1.507E+07 1.013E+03 5.028E+03 7.536E+06 5.063E+02 2053 1.771E+04 1.418E+07 9.527E+02 4.730E+03 7.090E+06 4.764E+02 2054 1.666E+04 1.334E+07 8.964E+02 4.450E+03 6.670E+06 4.482E+02 2055 1.567E+04 1.255E+07 8.433E+02 4.187E+03 6.276E+06 4.217E+02 2056 1.475E+04 1.181E+07 7.934E+02 3.939E+03 5.904E+06 3.967E+02 2057 1.387E+04 1.111E+07 7.465E+02 3.706E+03 5.555E+06 3.732E+02 2058 1.305E+04 1.045E+07 7.023E+02 3.487E+03 5.226E+06 3.511E+02 2059 1.228E+04 9.834E+06 6.607E+02 3.280E+03 4.917E+06 3.304E+02 2060 1.155E+04 9.252E+06 6.216E+02 3.086E+03 4.626E+06 3.108E+02 2061 1.087E+04 8.704E+06 5.848E+02 2.904E+03 4.352E+06 2.924E+02 2062 1.023E+04 8.189E+06 5.502E+02 2.732E+03 4.095E+06 2.751E+022063 9.622E+03 7.705E+06 5.177E+02 2.570E+03 3.852E+06 2.588E+022064 9.052E+03 7.249E+06 4.870E+02 2.418E+03 3.624E+06 2.435E+022065 8.517E+03 6.820E+06 4.582E+02 2.275E+03 3.410E+06 2.291E+022066 8.013E+03 6.416E+06 4.311E+02 2.140E+03 3.208E+06 2.156E+022067 7.538E+03 6.036E+06 4.056E+02 2.014E+03 3.018E+06 2.028E+022068 7.092E+03 5.679E+06 3.816E+02 1.894E+03 2.840E+06 1.908E+022069 6.673E+03 5.343E+06 3.590E+02 1.782E+03 2.672E+06 1.795E+022070 6.278E+03 5.027E+06 3.378E+02 1.677E+03 2.513E+06 1.689E+022071 5.906E+03 4.730E+06 3.178E+02 1.578E+03 2.365E+06 1.589E+022072 5.557E+03 4.450E+06 2.990E+02 1.484E+03 2.225E+06 1.495E+02 Total landfill gasYear Methane REPORT - 8 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2073 5.228E+03 4.186E+06 2.813E+02 1.396E+03 2.093E+06 1.406E+022074 4.919E+03 3.939E+06 2.646E+02 1.314E+03 1.969E+06 1.323E+022075 4.628E+03 3.706E+06 2.490E+02 1.236E+03 1.853E+06 1.245E+022076 4.354E+03 3.486E+06 2.342E+02 1.163E+03 1.743E+06 1.171E+022077 4.096E+03 3.280E+06 2.204E+02 1.094E+03 1.640E+06 1.102E+022078 3.854E+03 3.086E+06 2.073E+02 1.029E+03 1.543E+06 1.037E+022079 3.626E+03 2.903E+06 1.951E+02 9.684E+02 1.452E+06 9.753E+012080 3.411E+03 2.731E+06 1.835E+02 9.111E+02 1.366E+06 9.176E+01 2081 3.209E+03 2.570E+06 1.727E+02 8.572E+02 1.285E+06 8.633E+01 2082 3.019E+03 2.418E+06 1.624E+02 8.065E+02 1.209E+06 8.122E+01 2083 2.841E+03 2.275E+06 1.528E+02 7.588E+02 1.137E+06 7.642E+01 2084 2.673E+03 2.140E+06 1.438E+02 7.139E+02 1.070E+06 7.189E+01 2085 2.514E+03 2.013E+06 1.353E+02 6.716E+02 1.007E+06 6.764E+01 2086 2.366E+03 1.894E+06 1.273E+02 6.319E+02 9.471E+05 6.364E+01 2087 2.226E+03 1.782E+06 1.197E+02 5.945E+02 8.911E+05 5.987E+01 2088 2.094E+03 1.677E+06 1.127E+02 5.593E+02 8.383E+05 5.633E+01 2089 1.970E+03 1.577E+06 1.060E+02 5.262E+02 7.887E+05 5.299E+01 2090 1.853E+03 1.484E+06 9.972E+01 4.951E+02 7.421E+05 4.986E+01 2091 1.744E+03 1.396E+06 9.382E+01 4.658E+02 6.981E+05 4.691E+01 2092 1.641E+03 1.314E+06 8.826E+01 4.382E+02 6.568E+05 4.413E+01 2093 1.543E+03 1.236E+06 8.304E+01 4.123E+02 6.180E+05 4.152E+01 2094 1.452E+03 1.163E+06 7.813E+01 3.879E+02 5.814E+05 3.906E+01 2095 1.366E+03 1.094E+06 7.350E+01 3.649E+02 5.470E+05 3.675E+012096 1.285E+03 1.029E+06 6.915E+01 3.433E+02 5.146E+05 3.458E+012097 1.209E+03 9.683E+05 6.506E+01 3.230E+02 4.842E+05 3.253E+012098 1.138E+03 9.110E+05 6.121E+01 3.039E+02 4.555E+05 3.061E+012099 1.070E+03 8.571E+05 5.759E+01 2.859E+02 4.286E+05 2.879E+012100 1.007E+03 8.064E+05 5.418E+01 2.690E+02 4.032E+05 2.709E+012101 9.475E+02 7.587E+05 5.098E+01 2.531E+02 3.793E+05 2.549E+012102 8.914E+02 7.138E+05 4.796E+01 2.381E+02 3.569E+05 2.398E+012103 8.386E+02 6.715E+05 4.512E+01 2.240E+02 3.358E+05 2.256E+012104 7.890E+02 6.318E+05 4.245E+01 2.108E+02 3.159E+05 2.123E+012105 7.423E+02 5.944E+05 3.994E+01 1.983E+02 2.972E+05 1.997E+01 2106 6.984E+02 5.592E+05 3.758E+01 1.865E+02 2.796E+05 1.879E+01 2107 6.571E+02 5.261E+05 3.535E+01 1.755E+02 2.631E+05 1.768E+01 2108 6.182E+02 4.950E+05 3.326E+01 1.651E+02 2.475E+05 1.663E+01 2109 5.816E+02 4.657E+05 3.129E+01 1.554E+02 2.329E+05 1.565E+01 2110 5.472E+02 4.382E+05 2.944E+01 1.462E+02 2.191E+05 1.472E+01 2111 5.148E+02 4.122E+05 2.770E+01 1.375E+02 2.061E+05 1.385E+012112 4.843E+02 3.878E+05 2.606E+01 1.294E+02 1.939E+05 1.303E+01 Year Total landfill gas Methane REPORT - 9 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) Year (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)1972 0 00000 1973 7.499E+02 4.097E+05 2.753E+01 1.762E+00 4.916E+02 3.303E-02 1974 1.459E+03 7.972E+05 5.356E+01 3.429E+00 9.566E+02 6.427E-02 1975 2.130E+03 1.164E+06 7.819E+01 5.006E+00 1.397E+03 9.383E-02 1976 2.765E+03 1.511E+06 1.015E+02 6.498E+00 1.813E+03 1.218E-01 1977 3.367E+03 1.839E+06 1.236E+02 7.911E+00 2.207E+03 1.483E-01 1978 3.936E+03 2.150E+06 1.445E+02 9.250E+00 2.581E+03 1.734E-01 1979 4.476E+03 2.445E+06 1.643E+02 1.052E+01 2.934E+03 1.972E-01 1980 4.957E+03 2.708E+06 1.820E+02 1.165E+01 3.250E+03 2.183E-01 1981 5.342E+03 2.918E+06 1.961E+02 1.255E+01 3.502E+03 2.353E-01 1982 5.702E+03 3.115E+06 2.093E+02 1.340E+01 3.738E+03 2.511E-01 1983 6.128E+03 3.348E+06 2.249E+02 1.440E+01 4.018E+03 2.699E-01 1984 6.584E+03 3.597E+06 2.417E+02 1.547E+01 4.316E+03 2.900E-01 1985 7.035E+03 3.843E+06 2.582E+02 1.653E+01 4.612E+03 3.099E-01 1986 7.415E+03 4.051E+06 2.722E+02 1.742E+01 4.861E+03 3.266E-01 1987 7.780E+03 4.250E+06 2.856E+02 1.828E+01 5.100E+03 3.427E-011988 8.128E+03 4.440E+06 2.983E+02 1.910E+01 5.328E+03 3.580E-011989 8.459E+03 4.621E+06 3.105E+02 1.988E+01 5.545E+03 3.726E-011990 8.764E+03 4.788E+06 3.217E+02 2.059E+01 5.745E+03 3.860E-011991 9.197E+03 5.024E+06 3.376E+02 2.161E+01 6.029E+03 4.051E-011992 9.454E+03 5.165E+06 3.470E+02 2.222E+01 6.198E+03 4.164E-011993 9.667E+03 5.281E+06 3.548E+02 2.272E+01 6.338E+03 4.258E-011994 9.891E+03 5.403E+06 3.631E+02 2.324E+01 6.484E+03 4.357E-011995 1.012E+04 5.528E+06 3.714E+02 2.378E+01 6.634E+03 4.457E-011996 1.035E+04 5.654E+06 3.799E+02 2.432E+01 6.784E+03 4.558E-011997 1.050E+04 5.738E+06 3.855E+02 2.468E+01 6.885E+03 4.626E-01 1998 1.071E+04 5.849E+06 3.930E+02 2.516E+01 7.019E+03 4.716E-01 1999 1.099E+04 6.002E+06 4.033E+02 2.582E+01 7.202E+03 4.839E-01 2000 1.111E+04 6.067E+06 4.077E+02 2.610E+01 7.281E+03 4.892E-01 2001 1.125E+04 6.146E+06 4.129E+02 2.644E+01 7.375E+03 4.955E-01 2002 1.151E+04 6.288E+06 4.225E+02 2.705E+01 7.546E+03 5.070E-01 2003 1.189E+04 6.495E+06 4.364E+02 2.794E+01 7.794E+03 5.237E-01 2004 1.225E+04 6.692E+06 4.496E+02 2.878E+01 8.030E+03 5.395E-01 2005 1.263E+04 6.902E+06 4.638E+02 2.969E+01 8.283E+03 5.565E-01 2006 1.305E+04 7.130E+06 4.791E+02 3.067E+01 8.556E+03 5.749E-01 2007 1.345E+04 7.350E+06 4.939E+02 3.162E+01 8.820E+03 5.926E-01 2008 1.393E+04 7.612E+06 5.114E+02 3.274E+01 9.134E+03 6.137E-01 2009 1.434E+04 7.833E+06 5.263E+02 3.369E+01 9.400E+03 6.316E-01 2010 1.473E+04 8.047E+06 5.407E+02 3.461E+01 9.656E+03 6.488E-01 2011 1.510E+04 8.247E+06 5.541E+02 3.548E+01 9.897E+03 6.650E-01 2012 1.541E+04 8.417E+06 5.656E+02 3.621E+01 1.010E+04 6.787E-012013 1.564E+04 8.547E+06 5.742E+02 3.676E+01 1.026E+04 6.891E-012014 1.586E+04 8.666E+06 5.823E+02 3.728E+01 1.040E+04 6.987E-012015 1.611E+04 8.801E+06 5.914E+02 3.786E+01 1.056E+04 7.096E-012016 1.643E+04 8.975E+06 6.030E+02 3.860E+01 1.077E+04 7.236E-012017 1.676E+04 9.156E+06 6.152E+02 3.938E+01 1.099E+04 7.382E-012018 1.718E+04 9.383E+06 6.305E+02 4.036E+01 1.126E+04 7.565E-012019 1.760E+04 9.617E+06 6.462E+02 4.137E+01 1.154E+04 7.754E-012020 1.787E+04 9.764E+06 6.561E+02 4.200E+01 1.172E+04 7.873E-012021 1.813E+04 9.906E+06 6.656E+02 4.261E+01 1.189E+04 7.987E-01 Carbon dioxide NMOC REPORT - 10 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2022 1.838E+04 1.004E+07 6.747E+02 4.319E+01 1.205E+04 8.097E-012023 1.862E+04 1.017E+07 6.836E+02 4.376E+01 1.221E+04 8.203E-012024 1.886E+04 1.030E+07 6.921E+02 4.431E+01 1.236E+04 8.305E-012025 1.908E+04 1.042E+07 7.004E+02 4.484E+01 1.251E+04 8.404E-012026 1.930E+04 1.054E+07 7.083E+02 4.535E+01 1.265E+04 8.500E-012027 1.951E+04 1.066E+07 7.161E+02 4.584E+01 1.279E+04 8.593E-012028 1.971E+04 1.077E+07 7.236E+02 4.632E+01 1.292E+04 8.683E-012029 1.991E+04 1.088E+07 7.309E+02 4.679E+01 1.305E+04 8.771E-01 2030 2.011E+04 1.098E+07 7.380E+02 4.724E+01 1.318E+04 8.856E-01 2031 2.029E+04 1.109E+07 7.449E+02 4.768E+01 1.330E+04 8.938E-01 2032 2.048E+04 1.119E+07 7.516E+02 4.811E+01 1.342E+04 9.019E-01 2033 2.065E+04 1.128E+07 7.581E+02 4.853E+01 1.354E+04 9.098E-01 2034 2.083E+04 1.138E+07 7.645E+02 4.894E+01 1.365E+04 9.174E-01 2035 2.100E+04 1.147E+07 7.708E+02 4.934E+01 1.377E+04 9.249E-01 2036 2.117E+04 1.156E+07 7.769E+02 4.974E+01 1.388E+04 9.323E-01 2037 2.133E+04 1.165E+07 7.829E+02 5.012E+01 1.398E+04 9.395E-01 2038 2.149E+04 1.174E+07 7.887E+02 5.049E+01 1.409E+04 9.465E-01 2039 2.165E+04 1.182E+07 7.945E+02 5.086E+01 1.419E+04 9.534E-01 2040 2.180E+04 1.191E+07 8.002E+02 5.122E+01 1.429E+04 9.602E-01 2041 2.195E+04 1.199E+07 8.057E+02 5.158E+01 1.439E+04 9.669E-01 2042 2.210E+04 1.207E+07 8.112E+02 5.193E+01 1.449E+04 9.734E-01 2043 2.225E+04 1.215E+07 8.166E+02 5.228E+01 1.458E+04 9.799E-01 2044 2.239E+04 1.223E+07 8.219E+02 5.262E+01 1.468E+04 9.863E-012045 2.114E+04 1.155E+07 7.760E+02 4.968E+01 1.386E+04 9.312E-012046 1.989E+04 1.087E+07 7.301E+02 4.674E+01 1.304E+04 8.761E-012047 1.871E+04 1.022E+07 6.869E+02 4.397E+01 1.227E+04 8.243E-012048 1.761E+04 9.618E+06 6.463E+02 4.137E+01 1.154E+04 7.755E-012049 1.656E+04 9.049E+06 6.080E+02 3.892E+01 1.086E+04 7.296E-012050 1.558E+04 8.514E+06 5.720E+02 3.662E+01 1.022E+04 6.864E-012051 1.466E+04 8.010E+06 5.382E+02 3.445E+01 9.612E+03 6.458E-012052 1.379E+04 7.536E+06 5.063E+02 3.241E+01 9.043E+03 6.076E-012053 1.298E+04 7.090E+06 4.764E+02 3.050E+01 8.508E+03 5.716E-012054 1.221E+04 6.670E+06 4.482E+02 2.869E+01 8.004E+03 5.378E-01 2055 1.149E+04 6.276E+06 4.217E+02 2.699E+01 7.531E+03 5.060E-01 2056 1.081E+04 5.904E+06 3.967E+02 2.540E+01 7.085E+03 4.760E-01 2057 1.017E+04 5.555E+06 3.732E+02 2.389E+01 6.666E+03 4.479E-01 2058 9.566E+03 5.226E+06 3.511E+02 2.248E+01 6.271E+03 4.214E-01 2059 9.000E+03 4.917E+06 3.304E+02 2.115E+01 5.900E+03 3.964E-01 2060 8.468E+03 4.626E+06 3.108E+02 1.990E+01 5.551E+03 3.730E-01 2061 7.967E+03 4.352E+06 2.924E+02 1.872E+01 5.223E+03 3.509E-01 2062 7.495E+03 4.095E+06 2.751E+02 1.761E+01 4.914E+03 3.301E-01 2063 7.052E+03 3.852E+06 2.588E+02 1.657E+01 4.623E+03 3.106E-01 2064 6.634E+03 3.624E+06 2.435E+02 1.559E+01 4.349E+03 2.922E-01 2065 6.242E+03 3.410E+06 2.291E+02 1.467E+01 4.092E+03 2.749E-01 2066 5.872E+03 3.208E+06 2.156E+02 1.380E+01 3.850E+03 2.587E-01 2067 5.525E+03 3.018E+06 2.028E+02 1.298E+01 3.622E+03 2.434E-01 2068 5.198E+03 2.840E+06 1.908E+02 1.221E+01 3.408E+03 2.290E-01 2069 4.890E+03 2.672E+06 1.795E+02 1.149E+01 3.206E+03 2.154E-012070 4.601E+03 2.513E+06 1.689E+02 1.081E+01 3.016E+03 2.027E-012071 4.329E+03 2.365E+06 1.589E+02 1.017E+01 2.838E+03 1.907E-012072 4.073E+03 2.225E+06 1.495E+02 9.570E+00 2.670E+03 1.794E-01 NMOCCarbon dioxideYear REPORT - 11 JM - BASELINE - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2073 3.832E+03 2.093E+06 1.406E+02 9.003E+00 2.512E+03 1.688E-01 2074 3.605E+03 1.969E+06 1.323E+02 8.471E+00 2.363E+03 1.588E-01 2075 3.391E+03 1.853E+06 1.245E+02 7.969E+00 2.223E+03 1.494E-01 2076 3.191E+03 1.743E+06 1.171E+02 7.498E+00 2.092E+03 1.405E-01 2077 3.002E+03 1.640E+06 1.102E+02 7.054E+00 1.968E+03 1.322E-01 2078 2.824E+03 1.543E+06 1.037E+02 6.637E+00 1.851E+03 1.244E-01 2079 2.657E+03 1.452E+06 9.753E+01 6.244E+00 1.742E+03 1.170E-01 2080 2.500E+03 1.366E+06 9.176E+01 5.874E+00 1.639E+03 1.101E-01 2081 2.352E+03 1.285E+06 8.633E+01 5.527E+00 1.542E+03 1.036E-01 2082 2.213E+03 1.209E+06 8.122E+01 5.200E+00 1.451E+03 9.747E-02 2083 2.082E+03 1.137E+06 7.642E+01 4.892E+00 1.365E+03 9.170E-02 2084 1.959E+03 1.070E+06 7.189E+01 4.603E+00 1.284E+03 8.627E-02 2085 1.843E+03 1.007E+06 6.764E+01 4.330E+00 1.208E+03 8.117E-02 2086 1.734E+03 9.471E+05 6.364E+01 4.074E+00 1.137E+03 7.636E-02 2087 1.631E+03 8.911E+05 5.987E+01 3.833E+00 1.069E+03 7.185E-02 2088 1.535E+03 8.383E+05 5.633E+01 3.606E+00 1.006E+03 6.759E-022089 1.444E+03 7.887E+05 5.299E+01 3.393E+00 9.465E+02 6.359E-022090 1.358E+03 7.421E+05 4.986E+01 3.192E+00 8.905E+02 5.983E-022091 1.278E+03 6.981E+05 4.691E+01 3.003E+00 8.378E+02 5.629E-022092 1.202E+03 6.568E+05 4.413E+01 2.825E+00 7.882E+02 5.296E-022093 1.131E+03 6.180E+05 4.152E+01 2.658E+00 7.416E+02 4.983E-022094 1.064E+03 5.814E+05 3.906E+01 2.501E+00 6.977E+02 4.688E-022095 1.001E+03 5.470E+05 3.675E+01 2.353E+00 6.564E+02 4.410E-022096 9.420E+02 5.146E+05 3.458E+01 2.214E+00 6.175E+02 4.149E-022097 8.863E+02 4.842E+05 3.253E+01 2.083E+00 5.810E+02 3.904E-022098 8.338E+02 4.555E+05 3.061E+01 1.959E+00 5.466E+02 3.673E-02 2099 7.845E+02 4.286E+05 2.879E+01 1.843E+00 5.143E+02 3.455E-02 2100 7.381E+02 4.032E+05 2.709E+01 1.734E+00 4.838E+02 3.251E-02 2101 6.944E+02 3.793E+05 2.549E+01 1.632E+00 4.552E+02 3.059E-02 2102 6.533E+02 3.569E+05 2.398E+01 1.535E+00 4.283E+02 2.878E-02 2103 6.146E+02 3.358E+05 2.256E+01 1.444E+00 4.029E+02 2.707E-02 2104 5.783E+02 3.159E+05 2.123E+01 1.359E+00 3.791E+02 2.547E-02 2105 5.440E+02 2.972E+05 1.997E+01 1.278E+00 3.566E+02 2.396E-02 2106 5.118E+02 2.796E+05 1.879E+01 1.203E+00 3.355E+02 2.255E-02 2107 4.816E+02 2.631E+05 1.768E+01 1.132E+00 3.157E+02 2.121E-02 2108 4.531E+02 2.475E+05 1.663E+01 1.065E+00 2.970E+02 1.996E-02 2109 4.262E+02 2.329E+05 1.565E+01 1.002E+00 2.794E+02 1.877E-02 2110 4.010E+02 2.191E+05 1.472E+01 9.423E-01 2.629E+02 1.766E-02 2111 3.773E+02 2.061E+05 1.385E+01 8.866E-01 2.473E+02 1.662E-022112 3.550E+02 1.939E+05 1.303E+01 8.341E-01 2.327E+02 1.564E-02 NMOCYearCarbon dioxide REPORT - 12 Attachment B Baseline Iowa City Landfill Gas Recovery Table Year GCCS Flow Rate GCCS Collection Efficiency (Mg/year) (m3/year) (av ft^3/min) (Mg/year) (m3/year) (av ft^3/min) (av ft^3/min) (%) 1972 - - - - - - - 0%1973 1,023 819,348 55 921 737,414 50 - 0%1974 1,991 1,594,307 107 1,792 1,434,876 96 - 0% 1975 2,907 2,327,524 156 2,616 2,094,771 141 - 0% 1976 3,773 3,021,489 203 3,396 2,719,340 183 - 0% 1977 4,594 3,678,545 247 4,134 3,310,691 222 - 0%1978 5,371 4,300,899 289 4,834 3,870,809 260 - 0%1979 6,108 4,890,624 329 5,497 4,401,561 296 - 0% 1980 6,764 5,416,240 364 6,088 4,874,616 328 - 0% 1981 7,289 5,836,527 392 6,560 5,252,875 353 - 0% 1982 7,780 6,229,766 419 7,002 5,606,790 377 - 0%1983 8,362 6,695,947 450 7,526 6,026,352 405 - 0%1984 8,983 7,193,151 483 8,085 6,473,836 435 - 0% 1985 9,599 7,686,725 516 8,639 6,918,053 465 - 0% 1986 10,117 8,101,358 544 9,105 7,291,222 490 - 0% 1987 10,616 8,500,546 571 9,554 7,650,491 514 - 0%1988 11,090 8,880,503 597 9,981 7,992,453 537 - 0%1989 11,542 9,242,392 621 10,388 8,318,152 559 - 0% 1990 11,958 9,575,388 643 10,762 8,617,849 579 - 0% 1991 12,549 10,048,439 675 11,294 9,043,595 608 - 0% 1992 12,900 10,329,730 694 11,610 9,296,757 625 - 0%1993 13,191 10,562,537 710 11,872 9,506,283 639 - 0%1994 13,496 10,806,887 726 12,146 9,726,199 654 - 0% 1995 13,807 11,056,196 743 12,427 9,950,577 669 - 0% 1996 14,121 11,307,198 760 12,709 10,176,478 684 - 0% 1997 14,331 11,475,362 771 12,898 10,327,826 694 - 0%1998 14,610 11,698,973 786 13,149 10,529,075 707 - 0%1999 14,991 12,003,737 807 13,491 10,803,363 726 - 0% 2000 15,154 12,134,747 815 13,639 10,921,272 734 - 0% 2001 15,351 12,292,016 826 13,816 11,062,814 743 446 60% 2002 15,706 12,576,589 845 14,135 11,318,930 761 456 60%2003 16,222 12,989,583 873 14,600 11,690,625 785 471 60%2004 16,714 13,383,530 899 15,042 12,045,177 809 486 60% 2005 17,240 13,804,791 928 15,516 12,424,312 835 501 60% 2006 17,808 14,260,172 958 16,028 12,834,155 862 517 60% 2007 18,359 14,700,660 988 16,523 13,230,594 889 533 60%2008 19,012 15,223,545 1,023 17,110 13,701,190 921 552 60%2009 19,564 15,666,328 1,053 17,608 14,099,695 947 568 60% 2010 20,098 16,093,780 1,081 18,088 14,484,402 973 584 60% 2011 20,599 16,494,831 1,108 18,539 14,845,348 997 598 60% 2012 21,023 16,834,480 1,131 18,921 15,151,032 1,018 611 60%2013 21,346 17,093,166 1,148 19,212 15,383,850 1,034 620 60%2014 21,645 17,332,497 1,165 19,481 15,599,247 1,048 629 60% 2015 21,983 17,602,567 1,183 19,784 15,842,310 1,064 591 56% 2016 22,415 17,949,216 1,206 20,174 16,154,295 1,085 664 61% 2017 22,867 18,311,080 1,230 20,581 16,479,972 1,107 862 78% 2018 23,436 18,766,372 1,261 21,092 16,889,734 1,135 789 70% 2019 24,021 19,234,567 1,292 21,619 17,311,110 1,163 895 77% 2020 24,387 19,528,362 1,312 21,949 17,575,526 1,181 945 80%2021 24,741 19,811,272 1,331 22,267 17,830,145 1,198 958 80% 2022 25,081 20,083,971 1,349 22,573 18,075,574 1,214 972 80% 2023 25,410 20,347,093 1,367 22,869 18,312,384 1,230 984 80% 2024 25,727 20,601,234 1,384 23,155 18,541,111 1,246 997 80%2025 26,034 20,846,956 1,401 23,431 18,762,261 1,261 1,072 85%2026 26,331 21,084,787 1,417 23,698 18,976,309 1,275 1,084 85% 2027 26,619 21,315,224 1,432 23,957 19,183,702 1,289 1,096 85% 2028 26,898 21,538,735 1,447 24,208 19,384,862 1,302 1,107 85% 2029 27,169 21,755,761 1,462 24,452 19,580,185 1,316 1,118 85%2030 27,433 21,966,715 1,476 24,689 19,770,043 1,328 1,129 85% Total Landfill Gas - Generation Total Landfill Gas - Recoverable (90% of Generation) BASELINE 2031 27,689 22,171,988 1,490 24,920 19,954,789 1,341 1,140 85%2032 27,939 22,371,946 1,503 25,145 20,134,752 1,353 1,150 85%2033 28,182 22,566,936 1,516 25,364 20,310,243 1,365 1,160 85% 2034 28,420 22,757,283 1,529 25,578 20,481,554 1,376 1,170 85% 2035 28,652 22,943,292 1,542 25,787 20,648,963 1,387 1,179 85% 2036 28,879 23,125,252 1,554 25,991 20,812,726 1,398 1,189 85%2037 29,102 23,303,433 1,566 26,192 20,973,090 1,409 1,198 85%2038 29,320 23,478,092 1,577 26,388 21,130,283 1,420 1,207 85% 2039 29,534 23,649,469 1,589 26,581 21,284,522 1,430 1,216 85% 2040 29,744 23,817,789 1,600 26,770 21,436,010 1,440 1,224 85%2041 29,951 23,983,266 1,611 26,956 21,584,940 1,450 1,233 85%2042 30,154 24,146,101 1,622 27,139 21,731,491 1,460 1,241 85% 2043 30,355 24,306,482 1,633 27,319 21,875,834 1,470 1,249 85% 2044 30,552 24,464,587 1,644 27,497 22,018,128 1,479 1,331 90% 2045 28,847 23,099,714 1,552 25,963 20,789,743 1,397 1,257 90%2046 27,140 21,732,748 1,460 24,426 19,559,473 1,314 1,183 90%2047 25,534 20,446,675 1,374 22,981 18,402,007 1,236 1,113 90% 2048 24,023 19,236,707 1,293 21,621 17,313,036 1,163 1,047 90% 2049 22,602 18,098,341 1,216 20,341 16,288,507 1,094 985 90% 2050 21,264 17,027,339 1,144 19,138 15,324,605 1,030 927 90%2051 20,006 16,019,717 1,076 18,005 14,417,745 969 872 90%2052 18,822 15,071,722 1,013 16,940 13,564,550 911 820 90% 2053 17,708 14,179,826 953 15,937 12,761,843 857 772 90% 2054 16,660 13,340,710 896 14,994 12,006,639 807 726 90% 2055 15,674 12,551,250 843 14,107 11,296,125 759 683 90%2056 14,747 11,808,508 793 13,272 10,627,657 714 643 90%2057 13,874 11,109,718 746 12,487 9,998,747 672 605 90% 2058 13,053 10,452,281 702 11,748 9,407,053 632 569 90% 2059 12,281 9,833,749 661 11,053 8,850,374 595 535 90% 2060 11,554 9,251,820 622 10,399 8,326,638 559 504 90%2061 10,870 8,704,327 585 9,783 7,833,894 526 474 90%2062 10,227 8,189,233 550 9,204 7,370,310 495 446 90% 2063 9,622 7,704,621 518 8,660 6,934,159 466 419 90% 2064 9,052 7,248,686 487 8,147 6,523,818 438 395 90% 2065 8,517 6,819,733 458 7,665 6,137,759 412 371 90%2066 8,013 6,416,163 431 7,211 5,774,547 388 349 90%2067 7,538 6,036,475 406 6,785 5,432,828 365 329 90% 2068 7,092 5,679,256 382 6,383 5,111,330 343 309 90% 2069 6,673 5,343,176 359 6,005 4,808,858 323 291 90% 2070 6,278 5,026,984 338 5,650 4,524,286 304 274 90%2071 5,906 4,729,504 318 5,316 4,256,553 286 257 90%2072 5,557 4,449,627 299 5,001 4,004,664 269 242 90% 2073 5,228 4,186,312 281 4,705 3,767,681 253 228 90% 2074 4,919 3,938,580 265 4,427 3,544,722 238 214 90% 2075 4,628 3,705,508 249 4,165 3,334,957 224 202 90%2076 4,354 3,486,228 234 3,918 3,137,605 211 190 90%2077 4,096 3,279,924 220 3,686 2,951,932 198 179 90% 2078 3,854 3,085,829 207 3,468 2,777,246 187 168 90% 2079 3,626 2,903,219 195 3,263 2,612,897 176 158 90% 2080 3,411 2,731,416 184 3,070 2,458,275 165 149 90%2081 3,209 2,569,780 173 2,888 2,312,802 155 140 90%2082 3,019 2,417,709 162 2,717 2,175,938 146 132 90% 2083 2,841 2,274,636 153 2,557 2,047,173 138 124 90% 2084 2,673 2,140,031 144 2,405 1,926,028 129 116 90% 2085 2,514 2,013,391 135 2,263 1,812,052 122 110 90%2086 2,366 1,894,245 127 2,129 1,704,820 115 103 90%2087 2,226 1,782,150 120 2,003 1,603,935 108 97 90% 2088 2,094 1,676,688 113 1,884 1,509,019 101 91 90% 2089 1,970 1,577,467 106 1,773 1,419,720 95 86 90% 2090 1,853 1,484,117 100 1,668 1,335,706 90 81 90%2091 1,744 1,396,292 94 1,569 1,256,663 84 76 90%2092 1,641 1,313,664 88 1,476 1,182,298 79 71 90% 2093 1,543 1,235,926 83 1,389 1,112,333 75 67 90% 2094 1,452 1,162,788 78 1,307 1,046,509 70 63 90% 2095 1,366 1,093,978 74 1,230 984,580 66 60 90%2096 1,285 1,029,240 69 1,157 926,316 62 56 90%2097 1,209 968,333 65 1,088 871,499 59 53 90% 2098 1,138 911,030 61 1,024 819,927 55 50 90% 2099 1,070 857,118 58 963 771,406 52 47 90% 2100 1,007 806,396 54 906 725,757 49 44 90%2101 947 758,677 51 853 682,809 46 41 90%2102 891 713,781 48 802 642,402 43 39 90% 2103 839 671,541 45 755 604,387 41 37 90% 2104 789 631,802 42 710 568,622 38 34 90% 2105 742 594,414 40 668 534,972 36 32 90%2106 698 559,238 38 629 503,314 34 30 90% 2107 657 526,144 35 591 473,530 32 29 90%2108 618 495,009 33 556 445,508 30 27 90%2109 582 465,716 31 523 419,144 28 25 90% 2110 547 438,156 29 492 394,341 26 24 90% 2111 515 412,228 28 463 371,005 25 22 90% 2112 484 387,833 26 436 349,050 23 21 90% Attachment C Low Diversion and High Diversion Organics LandGEM Model Reports JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Summary Report Landfill Name or Identifier: City of Iowa City Landfill - LOW DIVERSION Date: First-Order Decomposition Rate Equation: Where, QCH4 = annual methane generation in the year of the calculation (m 3/year)i = 1-year time increment Mi = mass of waste accepted in the ith year (Mg) n = (year of the calculation) - (initial year of waste acceptance)j = 0.1-year time increment k = methane generation rate (year-1)Lo = potential methane generation capacity (m3/Mg) About LandGEM: Wednesday, April 8, 2020 LandGEM is based on a first-order decomposition rate equation for quantifying emissions from the decomposition of landfilled waste in municipal solid waste (MSW) landfills. The software provides a relatively simple approach to estimating landfill gas emissions. Model defaults are based on empirical data from U.S. landfills. Field test data can also be used in place of model defaults when available. Further guidance on EPA test methods, Clean Air Act (CAA) regulations, and other guidance regarding landfill gas emissions and control technology requirements can be found at http://www.epa.gov/ttnatw01/landfill/landflpg.html. Description/Comments: LOW DIVERSION model. Indicative of the LFG produced by the diversion of 20% of the 31.2% of the currently-received waste at the landfill. This model predicts LFG generation from ONLY the food waste that will be subtracted from the BASELINE model. K value consistent with IPCC guidance for 'food waste'. Lo value based on default IPCC DOC value of 0.15 for 'food waste' converted to Lo by IPCC conversion (Lo = MCF×DOC×DOCF×F×1.333) tij = age of the jth section of waste mass Mi accepted in the ith year (decimal years, e.g., 3.2 years) LandGEM is considered a screening tool — the better the input data, the better the estimates. Often, there are limitations with the available data regarding waste quantity and composition, variation in design and operating practices over time, and changes occurring over time that impact the emissions potential. Changes to landfill operation, such as operating under wet conditions through leachate recirculation or other liquid additions, will result in generating more gas at a faster rate. Defaults for estimating emissions for this type of operation are being developed to include in LandGEM along with defaults for convential landfills (no leachate or liquid additions) for developing emission inventories and determining CAA applicability. Refer to the Web site identified above for future updates. REPORT - 1 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Input Review LANDFILL CHARACTERISTICS Landfill Open Year 2021 Landfill Closure Year (with 80-year limit)2044 Actual Closure Year (without limit)2044 Have Model Calculate Closure Year?No Waste Design Capacity short tons MODEL PARAMETERS Methane Generation Rate, k 0.185 year -1 Potential Methane Generation Capacity, Lo 76 m 3/Mg NMOC Concentration 600 ppmv as hexane Methane Content 50 % by volume GASES / POLLUTANTS SELECTED Gas / Pollutant #1:Total landfill gas Gas / Pollutant #2:Methane Gas / Pollutant #3:Carbon dioxideGas / Pollutant #4:NMOC WASTE ACCEPTANCE RATES (Mg/year) (short tons/year) (Mg) (short tons) 2021 7,304 8,034 0 0 2022 7,337 8,070 7,304 8,034 2023 7,370 8,107 14,640 16,104 2024 7,403 8,144 22,010 24,2112025 7,437 8,181 29,414 32,3552026 7,471 8,218 36,851 40,5362027 7,505 8,255 44,322 48,7542028 7,539 8,293 51,826 57,0092029 7,573 8,330 59,365 65,3022030 7,607 8,368 66,938 73,6322031 7,642 8,406 74,546 82,0002032 7,677 8,444 82,188 90,4062033 7,712 8,483 89,864 98,8512034 7,747 8,521 97,576 107,333 2035 7,782 8,560 105,322 115,855 2036 7,817 8,599 113,104 124,414 2037 7,852 8,638 120,921 133,013 2038 7,888 8,677 128,774 141,651 2039 7,924 8,716 136,662 150,328 2040 7,960 8,756 144,586 159,044 2041 7,996 8,796 152,546 167,800 2042 8,032 8,836 160,542 176,596 2043 8,069 8,876 168,574 185,431 2044 419 461 176,643 194,307 2045 0 0 177,062 194,768 2046 0 0 177,062 194,768 2047 0 0 177,062 194,768 2048 0 0 177,062 194,768 2049 0 0 177,062 194,7682050 0 0 177,062 194,7682051 0 0 177,062 194,7682052 0 0 177,062 194,7682053 0 0 177,062 194,7682054 0 0 177,062 194,7682055 0 0 177,062 194,7682056 0 0 177,062 194,7682057 0 0 177,062 194,7682058 0 0 177,062 194,7682059 0 0 177,062 194,768 2060 0 0 177,062 194,768 Year Waste Accepted Waste-In-Place REPORT - 2 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 WASTE ACCEPTANCE RATES (Continued) (Mg/year) (short tons/year) (Mg) (short tons)2061 0 0 177,062 194,7682062 0 0 177,062 194,7682063 0 0 177,062 194,7682064 0 0 177,062 194,768 2065 0 0 177,062 194,768 2066 0 0 177,062 194,768 2067 0 0 177,062 194,768 2068 0 0 177,062 194,768 2069 0 0 177,062 194,768 2070 0 0 177,062 194,768 2071 0 0 177,062 194,768 2072 0 0 177,062 194,768 2073 0 0 177,062 194,768 2074 0 0 177,062 194,768 2075 0 0 177,062 194,768 2076 0 0 177,062 194,768 2077 0 0 177,062 194,768 2078 0 0 177,062 194,768 2079 0 0 177,062 194,7682080 0 0 177,062 194,7682081 0 0 177,062 194,7682082 0 0 177,062 194,7682083 0 0 177,062 194,7682084 0 0 177,062 194,7682085 0 0 177,062 194,7682086 0 0 177,062 194,7682087 0 0 177,062 194,7682088 0 0 177,062 194,7682089 0 0 177,062 194,768 2090 0 0 177,062 194,768 2091 0 0 177,062 194,768 2092 0 0 177,062 194,768 2093 0 0 177,062 194,768 2094 0 0 177,062 194,768 2095 0 0 177,062 194,768 2096 0 0 177,062 194,768 2097 0 0 177,062 194,768 2098 0 0 177,062 194,768 2099 0 0 177,062 194,7682100 0 0 177,062 194,768 Waste-In-PlaceYearWaste Accepted REPORT - 3 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Pollutant Parameters Concentration ConcentrationCompound(ppmv)Molecular Weight (ppmv)Molecular WeightTotal landfill gas 0.00Methane16.04Carbon dioxide 44.01NMOC4,000 86.181,1,1-Trichloroethane (methyl chloroform) - HAP 0.48 133.411,1,2,2-Tetrachloroethane - HAP/VOC 1.1 167.85 1,1-Dichloroethane (ethylidene dichloride) - HAP/VOC 2.4 98.97 1,1-Dichloroethene (vinylidene chloride) - HAP/VOC 0.20 96.94 1,2-Dichloroethane (ethylene dichloride) - HAP/VOC 0.41 98.96 1,2-Dichloropropane (propylene dichloride) - HAP/VOC 0.18 112.99 2-Propanol (isopropyl alcohol) - VOC 50 60.11 Acetone 7.0 58.08 Acrylonitrile - HAP/VOC 6.3 53.06 Benzene - No or Unknown Co-disposal - HAP/VOC 1.9 78.11Benzene - Co-disposal - HAP/VOC 11 78.11Bromodichloromethane - VOC 3.1 163.83Butane - VOC 5.0 58.12 Carbon disulfide - HAP/VOC 0.58 76.13 Carbon monoxide 140 28.01 Carbon tetrachloride - HAP/VOC 4.0E-03 153.84 Carbonyl sulfide - HAP/VOC 0.49 60.07 Chlorobenzene - HAP/VOC 0.25 112.56 Chlorodifluoromethane 1.3 86.47 Chloroethane (ethyl chloride) - HAP/VOC 1.3 64.52 Chloroform - HAP/VOC 0.03 119.39 Chloromethane - VOC 1.2 50.49 Dichlorobenzene - (HAP for para isomer/VOC)0.21 147 Dichlorodifluoromethane 16 120.91 Dichlorofluoromethane - VOC 2.6 102.92 Dichloromethane (methylene chloride) - HAP 14 84.94Dimethyl sulfide (methyl sulfide) - VOC 7.8 62.13 Ethane 890 30.07 Ethanol - VOC 27 46.08 Gas / Pollutant Default Parameters:PollutantsUser-specified Pollutant Parameters:GasesREPORT - 4 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Pollutant Parameters (Continued) Concentration ConcentrationCompound(ppmv)Molecular Weight (ppmv)Molecular Weight Ethyl mercaptan (ethanethiol) - VOC 2.3 62.13Ethylbenzene - HAP/VOC 4.6 106.16Ethylene dibromide - HAP/VOC 1.0E-03 187.88 Fluorotrichloromethane - VOC 0.76 137.38 Hexane - HAP/VOC 6.6 86.18 Hydrogen sulfide 36 34.08 Mercury (total) - HAP 2.9E-04 200.61 Methyl ethyl ketone - HAP/VOC 7.1 72.11 Methyl isobutyl ketone - HAP/VOC 1.9 100.16 Methyl mercaptan - VOC 2.5 48.11 Pentane - VOC 3.3 72.15 Perchloroethylene (tetrachloroethylene) - HAP 3.7 165.83 Propane - VOC 11 44.09 t-1,2-Dichloroethene - VOC 2.8 96.94 Toluene - No or Unknown Co-disposal - HAP/VOC 39 92.13Toluene - Co-disposal - HAP/VOC 170 92.13Trichloroethylene (trichloroethene) - HAP/VOC 2.8 131.40 Vinyl chloride - HAP/VOC 7.3 62.50 Xylenes - HAP/VOC 12 106.16 User-specified Pollutant Parameters:Gas / Pollutant Default Parameters:PollutantsREPORT - 5 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Graphs 0.000E+00 2.000E+02 4.000E+02 6.000E+02 8.000E+02 1.000E+03 1.200E+03 1.400E+03 1.600E+03 EmissionsYear Megagrams Per Year Total landfill gas Methane Carbon dioxide NMOC 0.000E+00 2.000E+05 4.000E+05 6.000E+05 8.000E+05 1.000E+06 1.200E+06 1.400E+06 EmissionsYear Cubic Meters Per Year Total landfill gas Methane Carbon dioxide NMOC 0.000E+00 1.000E+01 2.000E+01 3.000E+01 4.000E+01 5.000E+01 6.000E+01 7.000E+01 8.000E+01 9.000E+01 EmissionsYear User-specified Unit (units shown in legend below) Total landfill gas (av ft^3/min)Methane (av ft^3/min) Carbon dioxide (av ft^3/min)NMOC (av ft^3/min) REPORT - 6 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2021 0 00000 2022 2.363E+02 1.892E+05 1.271E+01 6.312E+01 9.462E+04 6.357E+00 2023 4.338E+02 3.474E+05 2.334E+01 1.159E+02 1.737E+05 1.167E+01 2024 5.990E+02 4.797E+05 3.223E+01 1.600E+02 2.398E+05 1.611E+01 2025 7.374E+02 5.905E+05 3.967E+01 1.970E+02 2.952E+05 1.984E+01 2026 8.535E+02 6.834E+05 4.592E+01 2.280E+02 3.417E+05 2.296E+01 2027 9.511E+02 7.616E+05 5.117E+01 2.540E+02 3.808E+05 2.559E+01 2028 1.033E+03 8.274E+05 5.559E+01 2.760E+02 4.137E+05 2.780E+01 2029 1.103E+03 8.830E+05 5.933E+01 2.945E+02 4.415E+05 2.966E+01 2030 1.162E+03 9.301E+05 6.249E+01 3.103E+02 4.650E+05 3.125E+01 2031 1.211E+03 9.701E+05 6.518E+01 3.236E+02 4.851E+05 3.259E+01 2032 1.254E+03 1.004E+06 6.748E+01 3.350E+02 5.021E+05 3.374E+01 2033 1.291E+03 1.034E+06 6.944E+01 3.448E+02 5.168E+05 3.472E+01 2034 1.322E+03 1.059E+06 7.114E+01 3.532E+02 5.294E+05 3.557E+01 2035 1.350E+03 1.081E+06 7.261E+01 3.605E+02 5.403E+05 3.631E+01 2036 1.373E+03 1.100E+06 7.389E+01 3.669E+02 5.499E+05 3.695E+012037 1.394E+03 1.117E+06 7.502E+01 3.725E+02 5.583E+05 3.751E+012038 1.413E+03 1.131E+06 7.602E+01 3.774E+02 5.657E+05 3.801E+012039 1.430E+03 1.145E+06 7.692E+01 3.819E+02 5.724E+05 3.846E+012040 1.445E+03 1.157E+06 7.772E+01 3.858E+02 5.784E+05 3.886E+012041 1.458E+03 1.168E+06 7.845E+01 3.895E+02 5.838E+05 3.923E+012042 1.471E+03 1.178E+06 7.912E+01 3.928E+02 5.888E+05 3.956E+012043 1.482E+03 1.187E+06 7.974E+01 3.959E+02 5.934E+05 3.987E+012044 1.493E+03 1.195E+06 8.032E+01 3.988E+02 5.977E+05 4.016E+012045 1.254E+03 1.004E+06 6.748E+01 3.350E+02 5.022E+05 3.374E+012046 1.042E+03 8.347E+05 5.609E+01 2.784E+02 4.174E+05 2.804E+01 2047 8.664E+02 6.938E+05 4.661E+01 2.314E+02 3.469E+05 2.331E+01 2048 7.201E+02 5.766E+05 3.874E+01 1.923E+02 2.883E+05 1.937E+01 2049 5.984E+02 4.792E+05 3.220E+01 1.598E+02 2.396E+05 1.610E+01 2050 4.974E+02 3.983E+05 2.676E+01 1.329E+02 1.991E+05 1.338E+01 2051 4.134E+02 3.310E+05 2.224E+01 1.104E+02 1.655E+05 1.112E+01 2052 3.435E+02 2.751E+05 1.848E+01 9.177E+01 1.375E+05 9.242E+00 2053 2.855E+02 2.286E+05 1.536E+01 7.627E+01 1.143E+05 7.681E+00 2054 2.373E+02 1.900E+05 1.277E+01 6.339E+01 9.501E+04 6.384E+00 2055 1.972E+02 1.579E+05 1.061E+01 5.268E+01 7.896E+04 5.305E+00 2056 1.639E+02 1.313E+05 8.819E+00 4.378E+01 6.563E+04 4.409E+00 2057 1.362E+02 1.091E+05 7.329E+00 3.639E+01 5.454E+04 3.665E+00 2058 1.132E+02 9.066E+04 6.091E+00 3.024E+01 4.533E+04 3.046E+00 2059 9.410E+01 7.535E+04 5.063E+00 2.513E+01 3.767E+04 2.531E+00 2060 7.820E+01 6.262E+04 4.208E+00 2.089E+01 3.131E+04 2.104E+00 2061 6.500E+01 5.205E+04 3.497E+00 1.736E+01 2.602E+04 1.748E+002062 5.402E+01 4.326E+04 2.906E+00 1.443E+01 2.163E+04 1.453E+002063 4.489E+01 3.595E+04 2.415E+00 1.199E+01 1.797E+04 1.208E+002064 3.731E+01 2.988E+04 2.007E+00 9.967E+00 1.494E+04 1.004E+002065 3.101E+01 2.483E+04 1.668E+00 8.283E+00 1.242E+04 8.342E-012066 2.577E+01 2.064E+04 1.387E+00 6.884E+00 1.032E+04 6.933E-012067 2.142E+01 1.715E+04 1.152E+00 5.722E+00 8.576E+03 5.762E-012068 1.780E+01 1.426E+04 9.578E-01 4.755E+00 7.128E+03 4.789E-012069 1.480E+01 1.185E+04 7.960E-01 3.952E+00 5.924E+03 3.980E-012070 1.230E+01 9.847E+03 6.616E-01 3.285E+00 4.923E+03 3.308E-01 MethaneTotal landfill gasYear REPORT - 7 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2071 1.022E+01 8.184E+03 5.498E-01 2.730E+00 4.092E+03 2.749E-01 2072 8.494E+00 6.801E+03 4.570E-01 2.269E+00 3.401E+03 2.285E-01 2073 7.059E+00 5.653E+03 3.798E-01 1.886E+00 2.826E+03 1.899E-01 2074 5.867E+00 4.698E+03 3.157E-01 1.567E+00 2.349E+03 1.578E-01 2075 4.876E+00 3.904E+03 2.623E-01 1.302E+00 1.952E+03 1.312E-01 2076 4.052E+00 3.245E+03 2.180E-01 1.082E+00 1.623E+03 1.090E-01 2077 3.368E+00 2.697E+03 1.812E-01 8.996E-01 1.348E+03 9.060E-02 2078 2.799E+00 2.241E+03 1.506E-01 7.477E-01 1.121E+03 7.530E-02 2079 2.326E+00 1.863E+03 1.252E-01 6.214E-01 9.314E+02 6.258E-02 2080 1.933E+00 1.548E+03 1.040E-01 5.165E-01 7.741E+02 5.201E-02 2081 1.607E+00 1.287E+03 8.646E-02 4.292E-01 6.434E+02 4.323E-02 2082 1.336E+00 1.069E+03 7.185E-02 3.567E-01 5.347E+02 3.593E-02 2083 1.110E+00 8.888E+02 5.972E-02 2.965E-01 4.444E+02 2.986E-02 2084 9.225E-01 7.387E+02 4.963E-02 2.464E-01 3.693E+02 2.482E-02 2085 7.667E-01 6.139E+02 4.125E-02 2.048E-01 3.070E+02 2.062E-02 2086 6.372E-01 5.102E+02 3.428E-02 1.702E-01 2.551E+02 1.714E-022087 5.296E-01 4.241E+02 2.849E-02 1.415E-01 2.120E+02 1.425E-022088 4.401E-01 3.524E+02 2.368E-02 1.176E-01 1.762E+02 1.184E-022089 3.658E-01 2.929E+02 1.968E-02 9.771E-02 1.465E+02 9.840E-032090 3.040E-01 2.434E+02 1.636E-02 8.121E-02 1.217E+02 8.178E-032091 2.527E-01 2.023E+02 1.359E-02 6.749E-02 1.012E+02 6.797E-032092 2.100E-01 1.682E+02 1.130E-02 5.609E-02 8.408E+01 5.649E-032093 1.745E-01 1.398E+02 9.390E-03 4.662E-02 6.988E+01 4.695E-032094 1.451E-01 1.161E+02 7.804E-03 3.874E-02 5.807E+01 3.902E-032095 1.206E-01 9.653E+01 6.486E-03 3.220E-02 4.827E+01 3.243E-032096 1.002E-01 8.023E+01 5.391E-03 2.676E-02 4.011E+01 2.695E-03 2097 8.327E-02 6.668E+01 4.480E-03 2.224E-02 3.334E+01 2.240E-03 2098 6.921E-02 5.542E+01 3.723E-03 1.849E-02 2.771E+01 1.862E-03 2099 5.752E-02 4.606E+01 3.095E-03 1.536E-02 2.303E+01 1.547E-03 2100 4.780E-02 3.828E+01 2.572E-03 1.277E-02 1.914E+01 1.286E-03 2101 3.973E-02 3.181E+01 2.138E-03 1.061E-02 1.591E+01 1.069E-03 2102 3.302E-02 2.644E+01 1.776E-03 8.820E-03 1.322E+01 8.882E-04 2103 2.744E-02 2.197E+01 1.476E-03 7.330E-03 1.099E+01 7.382E-04 2104 2.281E-02 1.826E+01 1.227E-03 6.092E-03 9.131E+00 6.135E-04 2105 1.896E-02 1.518E+01 1.020E-03 5.063E-03 7.589E+00 5.099E-04 2106 1.575E-02 1.261E+01 8.476E-04 4.208E-03 6.307E+00 4.238E-04 2107 1.309E-02 1.048E+01 7.044E-04 3.497E-03 5.242E+00 3.522E-04 2108 1.088E-02 8.714E+00 5.855E-04 2.907E-03 4.357E+00 2.927E-04 2109 9.044E-03 7.242E+00 4.866E-04 2.416E-03 3.621E+00 2.433E-04 2110 7.516E-03 6.019E+00 4.044E-04 2.008E-03 3.009E+00 2.022E-04 2111 6.247E-03 5.002E+00 3.361E-04 1.669E-03 2.501E+00 1.680E-042112 5.192E-03 4.157E+00 2.793E-04 1.387E-03 2.079E+00 1.397E-042113 4.315E-03 3.455E+00 2.322E-04 1.153E-03 1.728E+00 1.161E-042114 3.586E-03 2.872E+00 1.929E-04 9.579E-04 1.436E+00 9.647E-052115 2.980E-03 2.387E+00 1.604E-04 7.961E-04 1.193E+00 8.018E-052116 2.477E-03 1.984E+00 1.333E-04 6.617E-04 9.918E-01 6.664E-052117 2.059E-03 1.649E+00 1.108E-04 5.499E-04 8.243E-01 5.538E-052118 1.711E-03 1.370E+00 9.206E-05 4.570E-04 6.850E-01 4.603E-052119 1.422E-03 1.139E+00 7.651E-05 3.798E-04 5.693E-01 3.825E-052120 1.182E-03 9.464E-01 6.359E-05 3.157E-04 4.732E-01 3.179E-052121 9.822E-04 7.865E-01 5.285E-05 2.624E-04 3.933E-01 2.642E-05 Year MethaneTotal landfill gas REPORT - 8 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2122 8.163E-04 6.537E-01 4.392E-05 2.181E-04 3.268E-01 2.196E-052123 6.785E-04 5.433E-01 3.650E-05 1.812E-04 2.716E-01 1.825E-052124 5.639E-04 4.515E-01 3.034E-05 1.506E-04 2.258E-01 1.517E-052125 4.686E-04 3.753E-01 2.521E-05 1.252E-04 1.876E-01 1.261E-052126 3.895E-04 3.119E-01 2.096E-05 1.040E-04 1.559E-01 1.048E-052127 3.237E-04 2.592E-01 1.742E-05 8.647E-05 1.296E-01 8.708E-062128 2.690E-04 2.154E-01 1.447E-05 7.186E-05 1.077E-01 7.237E-062129 2.236E-04 1.790E-01 1.203E-05 5.972E-05 8.952E-02 6.015E-06 2130 1.858E-04 1.488E-01 9.998E-06 4.964E-05 7.440E-02 4.999E-06 2131 1.544E-04 1.237E-01 8.310E-06 4.125E-05 6.184E-02 4.155E-06 2132 1.284E-04 1.028E-01 6.906E-06 3.429E-05 5.139E-02 3.453E-06 2133 1.067E-04 8.542E-02 5.740E-06 2.850E-05 4.271E-02 2.870E-06 2134 8.866E-05 7.100E-02 4.770E-06 2.368E-05 3.550E-02 2.385E-06 2135 7.369E-05 5.901E-02 3.965E-06 1.968E-05 2.950E-02 1.982E-06 2136 6.124E-05 4.904E-02 3.295E-06 1.636E-05 2.452E-02 1.647E-06 2137 5.090E-05 4.076E-02 2.738E-06 1.360E-05 2.038E-02 1.369E-06 2138 4.230E-05 3.387E-02 2.276E-06 1.130E-05 1.694E-02 1.138E-06 2139 3.516E-05 2.815E-02 1.892E-06 9.391E-06 1.408E-02 9.458E-07 2140 2.922E-05 2.340E-02 1.572E-06 7.805E-06 1.170E-02 7.860E-07 2141 2.428E-05 1.945E-02 1.307E-06 6.487E-06 9.723E-03 6.533E-07 2142 2.018E-05 1.616E-02 1.086E-06 5.391E-06 8.081E-03 5.429E-07 2143 1.677E-05 1.343E-02 9.025E-07 4.481E-06 6.716E-03 4.512E-07 2144 1.394E-05 1.116E-02 7.501E-07 3.724E-06 5.582E-03 3.750E-072145 1.159E-05 9.278E-03 6.234E-07 3.095E-06 4.639E-03 3.117E-072146 9.630E-06 7.711E-03 5.181E-07 2.572E-06 3.855E-03 2.590E-072147 8.003E-06 6.409E-03 4.306E-07 2.138E-06 3.204E-03 2.153E-072148 6.651E-06 5.326E-03 3.579E-07 1.777E-06 2.663E-03 1.789E-072149 5.528E-06 4.427E-03 2.974E-07 1.477E-06 2.213E-03 1.487E-072150 4.594E-06 3.679E-03 2.472E-07 1.227E-06 1.839E-03 1.236E-072151 3.818E-06 3.058E-03 2.054E-07 1.020E-06 1.529E-03 1.027E-072152 3.173E-06 2.541E-03 1.707E-07 8.477E-07 1.271E-03 8.537E-082153 2.638E-06 2.112E-03 1.419E-07 7.045E-07 1.056E-03 7.095E-082154 2.192E-06 1.755E-03 1.179E-07 5.855E-07 8.776E-04 5.897E-08 2155 1.822E-06 1.459E-03 9.802E-08 4.866E-07 7.294E-04 4.901E-08 2156 1.514E-06 1.212E-03 8.146E-08 4.044E-07 6.062E-04 4.073E-08 2157 1.258E-06 1.008E-03 6.770E-08 3.361E-07 5.038E-04 3.385E-08 2158 1.046E-06 8.375E-04 5.627E-08 2.794E-07 4.187E-04 2.813E-08 2159 8.692E-07 6.960E-04 4.677E-08 2.322E-07 3.480E-04 2.338E-08 2160 7.224E-07 5.785E-04 3.887E-08 1.930E-07 2.892E-04 1.943E-082161 6.004E-07 4.808E-04 3.230E-08 1.604E-07 2.404E-04 1.615E-08 Year Total landfill gas Methane REPORT - 9 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) Year (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2021 0 00000 2022 1.732E+02 9.462E+04 6.357E+00 4.070E-01 1.135E+02 7.629E-03 2023 3.179E+02 1.737E+05 1.167E+01 7.471E-01 2.084E+02 1.400E-02 2024 4.390E+02 2.398E+05 1.611E+01 1.032E+00 2.878E+02 1.934E-02 2025 5.404E+02 2.952E+05 1.984E+01 1.270E+00 3.543E+02 2.380E-02 2026 6.255E+02 3.417E+05 2.296E+01 1.470E+00 4.101E+02 2.755E-02 2027 6.970E+02 3.808E+05 2.559E+01 1.638E+00 4.570E+02 3.070E-02 2028 7.573E+02 4.137E+05 2.780E+01 1.779E+00 4.964E+02 3.336E-02 2029 8.082E+02 4.415E+05 2.966E+01 1.899E+00 5.298E+02 3.560E-02 2030 8.513E+02 4.650E+05 3.125E+01 2.000E+00 5.580E+02 3.750E-02 2031 8.879E+02 4.851E+05 3.259E+01 2.086E+00 5.821E+02 3.911E-02 2032 9.192E+02 5.021E+05 3.374E+01 2.160E+00 6.026E+02 4.049E-02 2033 9.460E+02 5.168E+05 3.472E+01 2.223E+00 6.201E+02 4.167E-02 2034 9.691E+02 5.294E+05 3.557E+01 2.277E+00 6.353E+02 4.268E-02 2035 9.891E+02 5.403E+05 3.631E+01 2.324E+00 6.484E+02 4.357E-02 2036 1.007E+03 5.499E+05 3.695E+01 2.365E+00 6.599E+02 4.434E-022037 1.022E+03 5.583E+05 3.751E+01 2.401E+00 6.699E+02 4.501E-022038 1.036E+03 5.657E+05 3.801E+01 2.433E+00 6.789E+02 4.561E-022039 1.048E+03 5.724E+05 3.846E+01 2.462E+00 6.868E+02 4.615E-022040 1.059E+03 5.784E+05 3.886E+01 2.488E+00 6.940E+02 4.663E-022041 1.069E+03 5.838E+05 3.923E+01 2.511E+00 7.006E+02 4.707E-022042 1.078E+03 5.888E+05 3.956E+01 2.533E+00 7.065E+02 4.747E-022043 1.086E+03 5.934E+05 3.987E+01 2.552E+00 7.121E+02 4.784E-022044 1.094E+03 5.977E+05 4.016E+01 2.571E+00 7.173E+02 4.819E-022045 9.193E+02 5.022E+05 3.374E+01 2.160E+00 6.026E+02 4.049E-022046 7.640E+02 4.174E+05 2.804E+01 1.795E+00 5.008E+02 3.365E-02 2047 6.350E+02 3.469E+05 2.331E+01 1.492E+00 4.163E+02 2.797E-02 2048 5.277E+02 2.883E+05 1.937E+01 1.240E+00 3.460E+02 2.324E-02 2049 4.386E+02 2.396E+05 1.610E+01 1.031E+00 2.875E+02 1.932E-02 2050 3.645E+02 1.991E+05 1.338E+01 8.565E-01 2.390E+02 1.606E-02 2051 3.029E+02 1.655E+05 1.112E+01 7.119E-01 1.986E+02 1.334E-02 2052 2.518E+02 1.375E+05 9.242E+00 5.916E-01 1.651E+02 1.109E-02 2053 2.093E+02 1.143E+05 7.681E+00 4.917E-01 1.372E+02 9.217E-03 2054 1.739E+02 9.501E+04 6.384E+00 4.087E-01 1.140E+02 7.660E-03 2055 1.445E+02 7.896E+04 5.305E+00 3.396E-01 9.476E+01 6.367E-03 2056 1.201E+02 6.563E+04 4.409E+00 2.823E-01 7.875E+01 5.291E-03 2057 9.984E+01 5.454E+04 3.665E+00 2.346E-01 6.545E+01 4.398E-03 2058 8.298E+01 4.533E+04 3.046E+00 1.950E-01 5.440E+01 3.655E-03 2059 6.896E+01 3.767E+04 2.531E+00 1.621E-01 4.521E+01 3.038E-03 2060 5.732E+01 3.131E+04 2.104E+00 1.347E-01 3.757E+01 2.525E-03 2061 4.763E+01 2.602E+04 1.748E+00 1.119E-01 3.123E+01 2.098E-032062 3.959E+01 2.163E+04 1.453E+00 9.303E-02 2.595E+01 1.744E-032063 3.290E+01 1.797E+04 1.208E+00 7.732E-02 2.157E+01 1.449E-032064 2.735E+01 1.494E+04 1.004E+00 6.426E-02 1.793E+01 1.204E-032065 2.273E+01 1.242E+04 8.342E-01 5.341E-02 1.490E+01 1.001E-032066 1.889E+01 1.032E+04 6.933E-01 4.439E-02 1.238E+01 8.320E-042067 1.570E+01 8.576E+03 5.762E-01 3.689E-02 1.029E+01 6.915E-042068 1.305E+01 7.128E+03 4.789E-01 3.066E-02 8.553E+00 5.747E-042069 1.084E+01 5.924E+03 3.980E-01 2.548E-02 7.109E+00 4.776E-042070 9.012E+00 4.923E+03 3.308E-01 2.118E-02 5.908E+00 3.970E-04 NMOCCarbon dioxide REPORT - 10 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2071 7.490E+00 4.092E+03 2.749E-01 1.760E-02 4.910E+00 3.299E-042072 6.225E+00 3.401E+03 2.285E-01 1.463E-02 4.081E+00 2.742E-042073 5.174E+00 2.826E+03 1.899E-01 1.216E-02 3.392E+00 2.279E-042074 4.300E+00 2.349E+03 1.578E-01 1.010E-02 2.819E+00 1.894E-042075 3.574E+00 1.952E+03 1.312E-01 8.397E-03 2.343E+00 1.574E-042076 2.970E+00 1.623E+03 1.090E-01 6.979E-03 1.947E+00 1.308E-042077 2.468E+00 1.348E+03 9.060E-02 5.800E-03 1.618E+00 1.087E-042078 2.051E+00 1.121E+03 7.530E-02 4.821E-03 1.345E+00 9.036E-05 2079 1.705E+00 9.314E+02 6.258E-02 4.006E-03 1.118E+00 7.510E-05 2080 1.417E+00 7.741E+02 5.201E-02 3.330E-03 9.289E-01 6.242E-05 2081 1.178E+00 6.434E+02 4.323E-02 2.767E-03 7.721E-01 5.187E-05 2082 9.788E-01 5.347E+02 3.593E-02 2.300E-03 6.417E-01 4.311E-05 2083 8.135E-01 4.444E+02 2.986E-02 1.912E-03 5.333E-01 3.583E-05 2084 6.761E-01 3.693E+02 2.482E-02 1.589E-03 4.432E-01 2.978E-05 2085 5.619E-01 3.070E+02 2.062E-02 1.320E-03 3.684E-01 2.475E-05 2086 4.670E-01 2.551E+02 1.714E-02 1.097E-03 3.061E-01 2.057E-05 2087 3.881E-01 2.120E+02 1.425E-02 9.120E-04 2.544E-01 1.710E-05 2088 3.226E-01 1.762E+02 1.184E-02 7.580E-04 2.115E-01 1.421E-05 2089 2.681E-01 1.465E+02 9.840E-03 6.300E-04 1.757E-01 1.181E-05 2090 2.228E-01 1.217E+02 8.178E-03 5.236E-04 1.461E-01 9.814E-06 2091 1.852E-01 1.012E+02 6.797E-03 4.351E-04 1.214E-01 8.157E-06 2092 1.539E-01 8.408E+01 5.649E-03 3.616E-04 1.009E-01 6.779E-06 2093 1.279E-01 6.988E+01 4.695E-03 3.006E-04 8.385E-02 5.634E-062094 1.063E-01 5.807E+01 3.902E-03 2.498E-04 6.969E-02 4.682E-062095 8.835E-02 4.827E+01 3.243E-03 2.076E-04 5.792E-02 3.892E-062096 7.343E-02 4.011E+01 2.695E-03 1.725E-04 4.814E-02 3.234E-062097 6.103E-02 3.334E+01 2.240E-03 1.434E-04 4.001E-02 2.688E-062098 5.072E-02 2.771E+01 1.862E-03 1.192E-04 3.325E-02 2.234E-062099 4.215E-02 2.303E+01 1.547E-03 9.905E-05 2.763E-02 1.857E-062100 3.503E-02 1.914E+01 1.286E-03 8.232E-05 2.297E-02 1.543E-062101 2.912E-02 1.591E+01 1.069E-03 6.842E-05 1.909E-02 1.283E-062102 2.420E-02 1.322E+01 8.882E-04 5.686E-05 1.586E-02 1.066E-062103 2.011E-02 1.099E+01 7.382E-04 4.726E-05 1.318E-02 8.859E-07 2104 1.672E-02 9.131E+00 6.135E-04 3.928E-05 1.096E-02 7.363E-07 2105 1.389E-02 7.589E+00 5.099E-04 3.264E-05 9.107E-03 6.119E-07 2106 1.155E-02 6.307E+00 4.238E-04 2.713E-05 7.569E-03 5.086E-07 2107 9.596E-03 5.242E+00 3.522E-04 2.255E-05 6.291E-03 4.227E-07 2108 7.975E-03 4.357E+00 2.927E-04 1.874E-05 5.228E-03 3.513E-07 2109 6.628E-03 3.621E+00 2.433E-04 1.557E-05 4.345E-03 2.919E-07 2110 5.509E-03 3.009E+00 2.022E-04 1.294E-05 3.611E-03 2.426E-07 2111 4.578E-03 2.501E+00 1.680E-04 1.076E-05 3.001E-03 2.017E-07 2112 3.805E-03 2.079E+00 1.397E-04 8.941E-06 2.494E-03 1.676E-07 2113 3.162E-03 1.728E+00 1.161E-04 7.431E-06 2.073E-03 1.393E-07 2114 2.628E-03 1.436E+00 9.647E-05 6.176E-06 1.723E-03 1.158E-07 2115 2.184E-03 1.193E+00 8.018E-05 5.133E-06 1.432E-03 9.621E-08 2116 1.815E-03 9.918E-01 6.664E-05 4.266E-06 1.190E-03 7.996E-08 2117 1.509E-03 8.243E-01 5.538E-05 3.545E-06 9.891E-04 6.646E-08 2118 1.254E-03 6.850E-01 4.603E-05 2.947E-06 8.221E-04 5.523E-082119 1.042E-03 5.693E-01 3.825E-05 2.449E-06 6.832E-04 4.590E-082120 8.662E-04 4.732E-01 3.179E-05 2.035E-06 5.678E-04 3.815E-082121 7.199E-04 3.933E-01 2.642E-05 1.692E-06 4.719E-04 3.171E-08 Carbon dioxideYear NMOC REPORT - 11 JM - LOW DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2122 5.983E-04 3.268E-01 2.196E-05 1.406E-06 3.922E-04 2.635E-08 2123 4.972E-04 2.716E-01 1.825E-05 1.168E-06 3.260E-04 2.190E-08 2124 4.133E-04 2.258E-01 1.517E-05 9.711E-07 2.709E-04 1.820E-08 2125 3.435E-04 1.876E-01 1.261E-05 8.071E-07 2.252E-04 1.513E-08 2126 2.855E-04 1.559E-01 1.048E-05 6.708E-07 1.871E-04 1.257E-08 2127 2.372E-04 1.296E-01 8.708E-06 5.575E-07 1.555E-04 1.045E-08 2128 1.972E-04 1.077E-01 7.237E-06 4.633E-07 1.293E-04 8.685E-09 2129 1.639E-04 8.952E-02 6.015E-06 3.851E-07 1.074E-04 7.218E-09 2130 1.362E-04 7.440E-02 4.999E-06 3.200E-07 8.928E-05 5.999E-09 2131 1.132E-04 6.184E-02 4.155E-06 2.660E-07 7.420E-05 4.986E-09 2132 9.407E-05 5.139E-02 3.453E-06 2.211E-07 6.167E-05 4.144E-09 2133 7.818E-05 4.271E-02 2.870E-06 1.837E-07 5.125E-05 3.444E-09 2134 6.498E-05 3.550E-02 2.385E-06 1.527E-07 4.260E-05 2.862E-09 2135 5.400E-05 2.950E-02 1.982E-06 1.269E-07 3.540E-05 2.379E-09 2136 4.488E-05 2.452E-02 1.647E-06 1.055E-07 2.942E-05 1.977E-09 2137 3.730E-05 2.038E-02 1.369E-06 8.766E-08 2.445E-05 1.643E-092138 3.100E-05 1.694E-02 1.138E-06 7.285E-08 2.032E-05 1.366E-092139 2.577E-05 1.408E-02 9.458E-07 6.055E-08 1.689E-05 1.135E-092140 2.141E-05 1.170E-02 7.860E-07 5.032E-08 1.404E-05 9.432E-102141 1.780E-05 9.723E-03 6.533E-07 4.182E-08 1.167E-05 7.839E-102142 1.479E-05 8.081E-03 5.429E-07 3.476E-08 9.697E-06 6.515E-102143 1.229E-05 6.716E-03 4.512E-07 2.889E-08 8.059E-06 5.415E-102144 1.022E-05 5.582E-03 3.750E-07 2.401E-08 6.698E-06 4.500E-102145 8.492E-06 4.639E-03 3.117E-07 1.995E-08 5.567E-06 3.740E-102146 7.057E-06 3.855E-03 2.590E-07 1.658E-08 4.627E-06 3.109E-102147 5.865E-06 3.204E-03 2.153E-07 1.378E-08 3.845E-06 2.584E-10 2148 4.875E-06 2.663E-03 1.789E-07 1.145E-08 3.196E-06 2.147E-10 2149 4.051E-06 2.213E-03 1.487E-07 9.520E-09 2.656E-06 1.785E-10 2150 3.367E-06 1.839E-03 1.236E-07 7.912E-09 2.207E-06 1.483E-10 2151 2.798E-06 1.529E-03 1.027E-07 6.576E-09 1.835E-06 1.233E-10 2152 2.326E-06 1.271E-03 8.537E-08 5.465E-09 1.525E-06 1.024E-10 2153 1.933E-06 1.056E-03 7.095E-08 4.542E-09 1.267E-06 8.514E-11 2154 1.607E-06 8.776E-04 5.897E-08 3.775E-09 1.053E-06 7.076E-11 2155 1.335E-06 7.294E-04 4.901E-08 3.137E-09 8.753E-07 5.881E-11 2156 1.110E-06 6.062E-04 4.073E-08 2.608E-09 7.275E-07 4.888E-11 2157 9.223E-07 5.038E-04 3.385E-08 2.167E-09 6.046E-07 4.062E-11 2158 7.665E-07 4.187E-04 2.813E-08 1.801E-09 5.025E-07 3.376E-11 2159 6.370E-07 3.480E-04 2.338E-08 1.497E-09 4.176E-07 2.806E-11 2160 5.294E-07 2.892E-04 1.943E-08 1.244E-09 3.471E-07 2.332E-112161 4.400E-07 2.404E-04 1.615E-08 1.034E-09 2.885E-07 1.938E-11 NMOCYearCarbon dioxide REPORT - 12 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Summary Report Landfill Name or Identifier: City of Iowa City Landfill - HIGH DIVERSION Date: First-Order Decomposition Rate Equation: Where, QCH4 = annual methane generation in the year of the calculation (m 3/year)i = 1-year time increment Mi = mass of waste accepted in the ith year (Mg) n = (year of the calculation) - (initial year of waste acceptance)j = 0.1-year time increment k = methane generation rate (year-1)Lo = potential methane generation capacity (m3/Mg) tij = age of the jth section of waste mass Mi accepted in the ith year (decimal years, e.g., 3.2 years) LandGEM is considered a screening tool — the better the input data, the better the estimates. Often, there are limitations with the available data regarding waste quantity and composition, variation in design and operating practices over time, and changes occurring over time that impact the emissions potential. Changes to landfill operation, such as operating under wet conditions through leachate recirculation or other liquid additions, will result in generating more gas at a faster rate. Defaults for estimating emissions for this type of operation are being developed to include in LandGEM along with defaults for convential landfills (no leachate or liquid additions) for developing emission inventories and determining CAA applicability. Refer to the Web site identified above for future updates. Wednesday, April 8, 2020 LandGEM is based on a first-order decomposition rate equation for quantifying emissions from the decomposition of landfilled waste in municipal solid waste (MSW) landfills. The software provides a relatively simple approach to estimating landfill gas emissions. Model defaults are based on empirical data from U.S. landfills. Field test data can also be used in place of model defaults when available. Further guidance on EPA test methods, Clean Air Act (CAA) regulations, and other guidance regarding landfill gas emissions and control technology requirements can be found at http://www.epa.gov/ttnatw01/landfill/landflpg.html. Description/Comments: HIGH DIVERSION model. Indicative of the LFG produced by the diversion of 50% of the 31.2% of the currently-received waste at the landfill. This model predicts LFG generation from ONLY the food waste that will be subtracted from the BASELINE model. K value consistent with IPCC guidance for 'food waste'. Lo value based on default IPCC DOC value of 0.15 for 'food waste' converted to Lo by IPCC conversion (Lo = MCF×DOC×DOCF×F×1.333) About LandGEM: REPORT - 1 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Input Review LANDFILL CHARACTERISTICS Landfill Open Year 2021 Landfill Closure Year (with 80-year limit)2044 Actual Closure Year (without limit)2044 Have Model Calculate Closure Year?No Waste Design Capacity short tons MODEL PARAMETERS Methane Generation Rate, k 0.185 year -1 Potential Methane Generation Capacity, Lo 76 m 3/Mg NMOC Concentration 600 ppmv as hexane Methane Content 50 % by volume GASES / POLLUTANTS SELECTED Gas / Pollutant #1:Total landfill gas Gas / Pollutant #2:Methane Gas / Pollutant #3:Carbon dioxideGas / Pollutant #4:NMOC WASTE ACCEPTANCE RATES (Mg/year) (short tons/year) (Mg) (short tons) 2021 18,259 20,085 0 0 2022 18,342 20,176 18,259 20,085 2023 18,425 20,268 36,601 40,261 2024 18,509 20,360 55,026 60,5282025 18,593 20,452 73,534 80,8882026 18,677 20,545 92,127 101,3402027 18,762 20,638 110,804 121,8852028 18,847 20,732 129,566 142,5232029 18,933 20,826 148,413 163,2542030 19,019 20,920 167,346 184,0802031 19,105 21,015 186,364 205,0012032 19,192 21,111 205,469 226,0162033 19,279 21,207 224,661 247,1272034 19,366 21,303 243,940 268,334 2035 19,454 21,400 263,306 289,637 2036 19,543 21,497 282,760 311,036 2037 19,631 21,594 302,303 332,533 2038 19,720 21,692 321,934 354,127 2039 19,810 21,791 341,654 375,820 2040 19,900 21,890 361,464 397,611 2041 19,990 21,989 381,364 419,500 2042 20,081 22,089 401,354 441,490 2043 20,172 22,189 421,435 463,579 2044 1,047 1,152 441,607 485,768 2045 0 0 442,654 486,920 2046 0 0 442,654 486,920 2047 0 0 442,654 486,920 2048 0 0 442,654 486,920 2049 0 0 442,654 486,9202050 0 0 442,654 486,9202051 0 0 442,654 486,9202052 0 0 442,654 486,9202053 0 0 442,654 486,9202054 0 0 442,654 486,9202055 0 0 442,654 486,9202056 0 0 442,654 486,9202057 0 0 442,654 486,9202058 0 0 442,654 486,9202059 0 0 442,654 486,920 2060 0 0 442,654 486,920 Year Waste Accepted Waste-In-Place REPORT - 2 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 WASTE ACCEPTANCE RATES (Continued) (Mg/year) (short tons/year) (Mg) (short tons)2061 0 0 442,654 486,9202062 0 0 442,654 486,9202063 0 0 442,654 486,9202064 0 0 442,654 486,920 2065 0 0 442,654 486,920 2066 0 0 442,654 486,920 2067 0 0 442,654 486,920 2068 0 0 442,654 486,920 2069 0 0 442,654 486,920 2070 0 0 442,654 486,920 2071 0 0 442,654 486,920 2072 0 0 442,654 486,920 2073 0 0 442,654 486,920 2074 0 0 442,654 486,920 2075 0 0 442,654 486,920 2076 0 0 442,654 486,920 2077 0 0 442,654 486,920 2078 0 0 442,654 486,920 2079 0 0 442,654 486,9202080 0 0 442,654 486,9202081 0 0 442,654 486,9202082 0 0 442,654 486,9202083 0 0 442,654 486,9202084 0 0 442,654 486,9202085 0 0 442,654 486,9202086 0 0 442,654 486,9202087 0 0 442,654 486,9202088 0 0 442,654 486,9202089 0 0 442,654 486,920 2090 0 0 442,654 486,920 2091 0 0 442,654 486,920 2092 0 0 442,654 486,920 2093 0 0 442,654 486,920 2094 0 0 442,654 486,920 2095 0 0 442,654 486,920 2096 0 0 442,654 486,920 2097 0 0 442,654 486,920 2098 0 0 442,654 486,920 2099 0 0 442,654 486,9202100 0 0 442,654 486,920 Year Waste Accepted Waste-In-Place REPORT - 3 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Pollutant Parameters Concentration ConcentrationCompound(ppmv)Molecular Weight (ppmv)Molecular WeightTotal landfill gas 0.00Methane16.04Carbon dioxide 44.01NMOC4,000 86.181,1,1-Trichloroethane (methyl chloroform) - HAP 0.48 133.411,1,2,2-Tetrachloroethane - HAP/VOC 1.1 167.85 1,1-Dichloroethane (ethylidene dichloride) - HAP/VOC 2.4 98.97 1,1-Dichloroethene (vinylidene chloride) - HAP/VOC 0.20 96.94 1,2-Dichloroethane (ethylene dichloride) - HAP/VOC 0.41 98.96 1,2-Dichloropropane (propylene dichloride) - HAP/VOC 0.18 112.99 2-Propanol (isopropyl alcohol) - VOC 50 60.11 Acetone 7.0 58.08 Acrylonitrile - HAP/VOC 6.3 53.06 Benzene - No or Unknown Co-disposal - HAP/VOC 1.9 78.11Benzene - Co-disposal - HAP/VOC 11 78.11Bromodichloromethane - VOC 3.1 163.83Butane - VOC 5.0 58.12 Carbon disulfide - HAP/VOC 0.58 76.13 Carbon monoxide 140 28.01 Carbon tetrachloride - HAP/VOC 4.0E-03 153.84 Carbonyl sulfide - HAP/VOC 0.49 60.07 Chlorobenzene - HAP/VOC 0.25 112.56 Chlorodifluoromethane 1.3 86.47 Chloroethane (ethyl chloride) - HAP/VOC 1.3 64.52 Chloroform - HAP/VOC 0.03 119.39 Chloromethane - VOC 1.2 50.49 Dichlorobenzene - (HAP for para isomer/VOC)0.21 147 Dichlorodifluoromethane 16 120.91 Dichlorofluoromethane - VOC 2.6 102.92 Dichloromethane (methylene chloride) - HAP 14 84.94Dimethyl sulfide (methyl sulfide) - VOC 7.8 62.13 Ethane 890 30.07 Ethanol - VOC 27 46.08 Gas / Pollutant Default Parameters:PollutantsUser-specified Pollutant Parameters:GasesREPORT - 4 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Pollutant Parameters (Continued) Concentration ConcentrationCompound(ppmv)Molecular Weight (ppmv)Molecular Weight Ethyl mercaptan (ethanethiol) - VOC 2.3 62.13Ethylbenzene - HAP/VOC 4.6 106.16Ethylene dibromide - HAP/VOC 1.0E-03 187.88 Fluorotrichloromethane - VOC 0.76 137.38 Hexane - HAP/VOC 6.6 86.18 Hydrogen sulfide 36 34.08 Mercury (total) - HAP 2.9E-04 200.61 Methyl ethyl ketone - HAP/VOC 7.1 72.11 Methyl isobutyl ketone - HAP/VOC 1.9 100.16 Methyl mercaptan - VOC 2.5 48.11 Pentane - VOC 3.3 72.15 Perchloroethylene (tetrachloroethylene) - HAP 3.7 165.83 Propane - VOC 11 44.09 t-1,2-Dichloroethene - VOC 2.8 96.94 Toluene - No or Unknown Co-disposal - HAP/VOC 39 92.13Toluene - Co-disposal - HAP/VOC 170 92.13Trichloroethylene (trichloroethene) - HAP/VOC 2.8 131.40 Vinyl chloride - HAP/VOC 7.3 62.50 Xylenes - HAP/VOC 12 106.16 User-specified Pollutant Parameters:Gas / Pollutant Default Parameters:PollutantsREPORT - 5 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Graphs 0.000E+00 5.000E+02 1.000E+03 1.500E+03 2.000E+03 2.500E+03 3.000E+03 3.500E+03 4.000E+03 EmissionsYear Megagrams Per Year Total landfill gas Methane Carbon dioxide NMOC 0.000E+00 5.000E+05 1.000E+06 1.500E+06 2.000E+06 2.500E+06 3.000E+06 3.500E+06 EmissionsYear Cubic Meters Per Year Total landfill gas Methane Carbon dioxide NMOC 0.000E+00 5.000E+01 1.000E+02 1.500E+02 2.000E+02 2.500E+02 EmissionsYear User-specified Unit (units shown in legend below) Total landfill gas (av ft^3/min)Methane (av ft^3/min) Carbon dioxide (av ft^3/min)NMOC (av ft^3/min) REPORT - 6 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2021 0 00000 2022 5.908E+02 4.731E+05 3.179E+01 1.578E+02 2.365E+05 1.589E+01 2023 1.085E+03 8.684E+05 5.835E+01 2.897E+02 4.342E+05 2.917E+01 2024 1.498E+03 1.199E+06 8.057E+01 4.000E+02 5.996E+05 4.029E+01 2025 1.844E+03 1.476E+06 9.919E+01 4.924E+02 7.381E+05 4.959E+01 2026 2.134E+03 1.709E+06 1.148E+02 5.699E+02 8.543E+05 5.740E+01 2027 2.378E+03 1.904E+06 1.279E+02 6.351E+02 9.520E+05 6.396E+01 2028 2.583E+03 2.069E+06 1.390E+02 6.900E+02 1.034E+06 6.949E+01 2029 2.757E+03 2.207E+06 1.483E+02 7.364E+02 1.104E+06 7.416E+01 2030 2.904E+03 2.325E+06 1.562E+02 7.756E+02 1.163E+06 7.812E+01 2031 3.029E+03 2.425E+06 1.630E+02 8.090E+02 1.213E+06 8.148E+01 2032 3.135E+03 2.511E+06 1.687E+02 8.375E+02 1.255E+06 8.435E+01 2033 3.227E+03 2.584E+06 1.736E+02 8.619E+02 1.292E+06 8.681E+01 2034 3.306E+03 2.647E+06 1.779E+02 8.830E+02 1.323E+06 8.893E+01 2035 3.374E+03 2.702E+06 1.815E+02 9.012E+02 1.351E+06 9.076E+01 2036 3.434E+03 2.749E+06 1.847E+02 9.172E+02 1.375E+06 9.237E+012037 3.486E+03 2.791E+06 1.876E+02 9.312E+02 1.396E+06 9.378E+012038 3.532E+03 2.829E+06 1.901E+02 9.436E+02 1.414E+06 9.503E+012039 3.574E+03 2.862E+06 1.923E+02 9.546E+02 1.431E+06 9.614E+012040 3.611E+03 2.892E+06 1.943E+02 9.646E+02 1.446E+06 9.715E+012041 3.645E+03 2.919E+06 1.961E+02 9.737E+02 1.459E+06 9.806E+012042 3.676E+03 2.944E+06 1.978E+02 9.820E+02 1.472E+06 9.890E+012043 3.705E+03 2.967E+06 1.994E+02 9.897E+02 1.484E+06 9.968E+012044 3.732E+03 2.989E+06 2.008E+02 9.969E+02 1.494E+06 1.004E+022045 3.136E+03 2.511E+06 1.687E+02 8.376E+02 1.255E+06 8.435E+012046 2.606E+03 2.087E+06 1.402E+02 6.961E+02 1.043E+06 7.011E+01 2047 2.166E+03 1.734E+06 1.165E+02 5.785E+02 8.672E+05 5.827E+01 2048 1.800E+03 1.441E+06 9.685E+01 4.808E+02 7.207E+05 4.843E+01 2049 1.496E+03 1.198E+06 8.049E+01 3.996E+02 5.990E+05 4.025E+01 2050 1.243E+03 9.957E+05 6.690E+01 3.321E+02 4.978E+05 3.345E+01 2051 1.033E+03 8.275E+05 5.560E+01 2.760E+02 4.138E+05 2.780E+01 2052 8.589E+02 6.877E+05 4.621E+01 2.294E+02 3.439E+05 2.310E+01 2053 7.138E+02 5.716E+05 3.840E+01 1.907E+02 2.858E+05 1.920E+01 2054 5.932E+02 4.750E+05 3.192E+01 1.585E+02 2.375E+05 1.596E+01 2055 4.931E+02 3.948E+05 2.653E+01 1.317E+02 1.974E+05 1.326E+01 2056 4.098E+02 3.281E+05 2.205E+01 1.095E+02 1.641E+05 1.102E+01 2057 3.406E+02 2.727E+05 1.832E+01 9.097E+01 1.364E+05 9.162E+00 2058 2.830E+02 2.267E+05 1.523E+01 7.560E+01 1.133E+05 7.614E+00 2059 2.352E+02 1.884E+05 1.266E+01 6.284E+01 9.419E+04 6.328E+00 2060 1.955E+02 1.566E+05 1.052E+01 5.222E+01 7.828E+04 5.259E+00 2061 1.625E+02 1.301E+05 8.742E+00 4.340E+01 6.506E+04 4.371E+002062 1.350E+02 1.081E+05 7.266E+00 3.607E+01 5.407E+04 3.633E+002063 1.122E+02 8.987E+04 6.039E+00 2.998E+01 4.494E+04 3.019E+002064 9.328E+01 7.469E+04 5.019E+00 2.492E+01 3.735E+04 2.509E+002065 7.753E+01 6.208E+04 4.171E+00 2.071E+01 3.104E+04 2.086E+002066 6.443E+01 5.159E+04 3.467E+00 1.721E+01 2.580E+04 1.733E+002067 5.355E+01 4.288E+04 2.881E+00 1.430E+01 2.144E+04 1.441E+002068 4.451E+01 3.564E+04 2.395E+00 1.189E+01 1.782E+04 1.197E+002069 3.699E+01 2.962E+04 1.990E+00 9.880E+00 1.481E+04 9.950E-012070 3.074E+01 2.462E+04 1.654E+00 8.211E+00 1.231E+04 8.270E-01 Year Total landfill gas Methane REPORT - 7 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2071 2.555E+01 2.046E+04 1.375E+00 6.825E+00 1.023E+04 6.873E-01 2072 2.123E+01 1.700E+04 1.142E+00 5.672E+00 8.502E+03 5.712E-01 2073 1.765E+01 1.413E+04 9.495E-01 4.714E+00 7.066E+03 4.747E-01 2074 1.467E+01 1.174E+04 7.891E-01 3.918E+00 5.872E+03 3.946E-01 2075 1.219E+01 9.761E+03 6.559E-01 3.256E+00 4.881E+03 3.279E-01 2076 1.013E+01 8.113E+03 5.451E-01 2.706E+00 4.056E+03 2.725E-01 2077 8.420E+00 6.742E+03 4.530E-01 2.249E+00 3.371E+03 2.265E-01 2078 6.998E+00 5.604E+03 3.765E-01 1.869E+00 2.802E+03 1.883E-01 2079 5.816E+00 4.657E+03 3.129E-01 1.554E+00 2.329E+03 1.565E-01 2080 4.834E+00 3.871E+03 2.601E-01 1.291E+00 1.935E+03 1.300E-01 2081 4.017E+00 3.217E+03 2.161E-01 1.073E+00 1.608E+03 1.081E-01 2082 3.339E+00 2.674E+03 1.796E-01 8.918E-01 1.337E+03 8.982E-02 2083 2.775E+00 2.222E+03 1.493E-01 7.412E-01 1.111E+03 7.465E-02 2084 2.306E+00 1.847E+03 1.241E-01 6.160E-01 9.234E+02 6.204E-02 2085 1.917E+00 1.535E+03 1.031E-01 5.120E-01 7.674E+02 5.156E-02 2086 1.593E+00 1.276E+03 8.571E-02 4.255E-01 6.378E+02 4.285E-022087 1.324E+00 1.060E+03 7.123E-02 3.536E-01 5.301E+02 3.562E-022088 1.100E+00 8.811E+02 5.920E-02 2.939E-01 4.405E+02 2.960E-022089 9.145E-01 7.323E+02 4.920E-02 2.443E-01 3.661E+02 2.460E-022090 7.600E-01 6.086E+02 4.089E-02 2.030E-01 3.043E+02 2.045E-022091 6.317E-01 5.058E+02 3.399E-02 1.687E-01 2.529E+02 1.699E-022092 5.250E-01 4.204E+02 2.825E-02 1.402E-01 2.102E+02 1.412E-022093 4.363E-01 3.494E+02 2.347E-02 1.165E-01 1.747E+02 1.174E-022094 3.626E-01 2.904E+02 1.951E-02 9.686E-02 1.452E+02 9.755E-032095 3.014E-01 2.413E+02 1.621E-02 8.050E-02 1.207E+02 8.107E-032096 2.505E-01 2.006E+02 1.348E-02 6.691E-02 1.003E+02 6.738E-03 2097 2.082E-01 1.667E+02 1.120E-02 5.561E-02 8.335E+01 5.600E-03 2098 1.730E-01 1.385E+02 9.309E-03 4.621E-02 6.927E+01 4.654E-03 2099 1.438E-01 1.151E+02 7.736E-03 3.841E-02 5.757E+01 3.868E-03 2100 1.195E-01 9.570E+01 6.430E-03 3.192E-02 4.785E+01 3.215E-03 2101 9.932E-02 7.953E+01 5.344E-03 2.653E-02 3.977E+01 2.672E-03 2102 8.255E-02 6.610E+01 4.441E-03 2.205E-02 3.305E+01 2.221E-03 2103 6.861E-02 5.494E+01 3.691E-03 1.833E-02 2.747E+01 1.846E-03 2104 5.702E-02 4.566E+01 3.068E-03 1.523E-02 2.283E+01 1.534E-03 2105 4.739E-02 3.795E+01 2.550E-03 1.266E-02 1.897E+01 1.275E-03 2106 3.938E-02 3.154E+01 2.119E-03 1.052E-02 1.577E+01 1.059E-03 2107 3.273E-02 2.621E+01 1.761E-03 8.743E-03 1.311E+01 8.805E-04 2108 2.720E-02 2.178E+01 1.464E-03 7.267E-03 1.089E+01 7.318E-04 2109 2.261E-02 1.810E+01 1.216E-03 6.039E-03 9.052E+00 6.082E-04 2110 1.879E-02 1.505E+01 1.011E-03 5.019E-03 7.523E+00 5.055E-04 2111 1.562E-02 1.251E+01 8.402E-04 4.172E-03 6.253E+00 4.201E-042112 1.298E-02 1.039E+01 6.983E-04 3.467E-03 5.197E+00 3.492E-042113 1.079E-02 8.638E+00 5.804E-04 2.881E-03 4.319E+00 2.902E-042114 8.965E-03 7.179E+00 4.824E-04 2.395E-03 3.590E+00 2.412E-042115 7.451E-03 5.967E+00 4.009E-04 1.990E-03 2.983E+00 2.004E-042116 6.193E-03 4.959E+00 3.332E-04 1.654E-03 2.479E+00 1.666E-042117 5.147E-03 4.121E+00 2.769E-04 1.375E-03 2.061E+00 1.385E-042118 4.278E-03 3.425E+00 2.301E-04 1.143E-03 1.713E+00 1.151E-042119 3.555E-03 2.847E+00 1.913E-04 9.496E-04 1.423E+00 9.564E-052120 2.955E-03 2.366E+00 1.590E-04 7.892E-04 1.183E+00 7.948E-052121 2.456E-03 1.966E+00 1.321E-04 6.559E-04 9.832E-01 6.606E-05 Total landfill gas MethaneYear REPORT - 8 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2122 2.041E-03 1.634E+00 1.098E-04 5.451E-04 8.171E-01 5.490E-052123 1.696E-03 1.358E+00 9.126E-05 4.531E-04 6.791E-01 4.563E-052124 1.410E-03 1.129E+00 7.584E-05 3.765E-04 5.644E-01 3.792E-052125 1.172E-03 9.382E-01 6.304E-05 3.129E-04 4.691E-01 3.152E-052126 9.737E-04 7.797E-01 5.239E-05 2.601E-04 3.899E-01 2.619E-052127 8.093E-04 6.480E-01 4.354E-05 2.162E-04 3.240E-01 2.177E-052128 6.726E-04 5.386E-01 3.619E-05 1.797E-04 2.693E-01 1.809E-052129 5.590E-04 4.476E-01 3.007E-05 1.493E-04 2.238E-01 1.504E-05 2130 4.646E-04 3.720E-01 2.500E-05 1.241E-04 1.860E-01 1.250E-05 2131 3.861E-04 3.092E-01 2.077E-05 1.031E-04 1.546E-01 1.039E-05 2132 3.209E-04 2.570E-01 1.727E-05 8.572E-05 1.285E-01 8.633E-06 2133 2.667E-04 2.136E-01 1.435E-05 7.124E-05 1.068E-01 7.175E-06 2134 2.217E-04 1.775E-01 1.193E-05 5.921E-05 8.875E-02 5.963E-06 2135 1.842E-04 1.475E-01 9.911E-06 4.921E-05 7.376E-02 4.956E-06 2136 1.531E-04 1.226E-01 8.237E-06 4.090E-05 6.130E-02 4.119E-06 2137 1.272E-04 1.019E-01 6.846E-06 3.399E-05 5.095E-02 3.423E-06 2138 1.058E-04 8.468E-02 5.690E-06 2.825E-05 4.234E-02 2.845E-06 2139 8.789E-05 7.038E-02 4.729E-06 2.348E-05 3.519E-02 2.364E-06 2140 7.305E-05 5.849E-02 3.930E-06 1.951E-05 2.925E-02 1.965E-06 2141 6.071E-05 4.861E-02 3.266E-06 1.622E-05 2.431E-02 1.633E-06 2142 5.046E-05 4.040E-02 2.715E-06 1.348E-05 2.020E-02 1.357E-06 2143 4.194E-05 3.358E-02 2.256E-06 1.120E-05 1.679E-02 1.128E-06 2144 3.485E-05 2.791E-02 1.875E-06 9.309E-06 1.395E-02 9.376E-072145 2.897E-05 2.319E-02 1.558E-06 7.737E-06 1.160E-02 7.792E-072146 2.407E-05 1.928E-02 1.295E-06 6.430E-06 9.639E-03 6.476E-072147 2.001E-05 1.602E-02 1.076E-06 5.344E-06 8.011E-03 5.382E-072148 1.663E-05 1.332E-02 8.947E-07 4.442E-06 6.658E-03 4.473E-072149 1.382E-05 1.107E-02 7.436E-07 3.692E-06 5.533E-03 3.718E-072150 1.149E-05 9.197E-03 6.180E-07 3.068E-06 4.599E-03 3.090E-072151 9.546E-06 7.644E-03 5.136E-07 2.550E-06 3.822E-03 2.568E-072152 7.934E-06 6.353E-03 4.269E-07 2.119E-06 3.176E-03 2.134E-072153 6.594E-06 5.280E-03 3.548E-07 1.761E-06 2.640E-03 1.774E-072154 5.480E-06 4.388E-03 2.948E-07 1.464E-06 2.194E-03 1.474E-07 2155 4.555E-06 3.647E-03 2.450E-07 1.217E-06 1.824E-03 1.225E-07 2156 3.785E-06 3.031E-03 2.037E-07 1.011E-06 1.516E-03 1.018E-07 2157 3.146E-06 2.519E-03 1.693E-07 8.403E-07 1.260E-03 8.463E-08 2158 2.615E-06 2.094E-03 1.407E-07 6.984E-07 1.047E-03 7.034E-08 2159 2.173E-06 1.740E-03 1.169E-07 5.804E-07 8.700E-04 5.846E-08 2160 1.806E-06 1.446E-03 9.717E-08 4.824E-07 7.231E-04 4.858E-082161 1.501E-06 1.202E-03 8.076E-08 4.009E-07 6.010E-04 4.038E-08 Year Total landfill gas Methane REPORT - 9 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) Year (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2021 0 00000 2022 4.330E+02 2.365E+05 1.589E+01 1.017E+00 2.839E+02 1.907E-02 2023 7.948E+02 4.342E+05 2.917E+01 1.868E+00 5.211E+02 3.501E-02 2024 1.098E+03 5.996E+05 4.029E+01 2.579E+00 7.195E+02 4.834E-02 2025 1.351E+03 7.381E+05 4.959E+01 3.175E+00 8.857E+02 5.951E-02 2026 1.564E+03 8.543E+05 5.740E+01 3.675E+00 1.025E+03 6.888E-02 2027 1.743E+03 9.520E+05 6.396E+01 4.095E+00 1.142E+03 7.676E-02 2028 1.893E+03 1.034E+06 6.949E+01 4.449E+00 1.241E+03 8.339E-02 2029 2.020E+03 1.104E+06 7.416E+01 4.748E+00 1.324E+03 8.899E-02 2030 2.128E+03 1.163E+06 7.812E+01 5.001E+00 1.395E+03 9.374E-02 2031 2.220E+03 1.213E+06 8.148E+01 5.216E+00 1.455E+03 9.777E-02 2032 2.298E+03 1.255E+06 8.435E+01 5.400E+00 1.506E+03 1.012E-01 2033 2.365E+03 1.292E+06 8.681E+01 5.557E+00 1.550E+03 1.042E-01 2034 2.423E+03 1.323E+06 8.893E+01 5.693E+00 1.588E+03 1.067E-01 2035 2.473E+03 1.351E+06 9.076E+01 5.811E+00 1.621E+03 1.089E-01 2036 2.516E+03 1.375E+06 9.237E+01 5.913E+00 1.650E+03 1.108E-012037 2.555E+03 1.396E+06 9.378E+01 6.004E+00 1.675E+03 1.125E-012038 2.589E+03 1.414E+06 9.503E+01 6.084E+00 1.697E+03 1.140E-012039 2.619E+03 1.431E+06 9.614E+01 6.155E+00 1.717E+03 1.154E-012040 2.647E+03 1.446E+06 9.715E+01 6.219E+00 1.735E+03 1.166E-012041 2.672E+03 1.459E+06 9.806E+01 6.278E+00 1.751E+03 1.177E-012042 2.694E+03 1.472E+06 9.890E+01 6.331E+00 1.766E+03 1.187E-012043 2.716E+03 1.484E+06 9.968E+01 6.381E+00 1.780E+03 1.196E-012044 2.735E+03 1.494E+06 1.004E+02 6.427E+00 1.793E+03 1.205E-012045 2.298E+03 1.255E+06 8.435E+01 5.400E+00 1.507E+03 1.012E-012046 1.910E+03 1.043E+06 7.011E+01 4.488E+00 1.252E+03 8.413E-02 2047 1.587E+03 8.672E+05 5.827E+01 3.730E+00 1.041E+03 6.992E-02 2048 1.319E+03 7.207E+05 4.843E+01 3.100E+00 8.649E+02 5.811E-02 2049 1.096E+03 5.990E+05 4.025E+01 2.577E+00 7.188E+02 4.830E-02 2050 9.113E+02 4.978E+05 3.345E+01 2.141E+00 5.974E+02 4.014E-02 2051 7.574E+02 4.138E+05 2.780E+01 1.780E+00 4.965E+02 3.336E-02 2052 6.295E+02 3.439E+05 2.310E+01 1.479E+00 4.126E+02 2.773E-02 2053 5.231E+02 2.858E+05 1.920E+01 1.229E+00 3.430E+02 2.304E-02 2054 4.348E+02 2.375E+05 1.596E+01 1.022E+00 2.850E+02 1.915E-02 2055 3.614E+02 1.974E+05 1.326E+01 8.491E-01 2.369E+02 1.592E-02 2056 3.003E+02 1.641E+05 1.102E+01 7.057E-01 1.969E+02 1.323E-02 2057 2.496E+02 1.364E+05 9.162E+00 5.865E-01 1.636E+02 1.099E-02 2058 2.074E+02 1.133E+05 7.614E+00 4.875E-01 1.360E+02 9.137E-03 2059 1.724E+02 9.419E+04 6.328E+00 4.051E-01 1.130E+02 7.594E-03 2060 1.433E+02 7.828E+04 5.259E+00 3.367E-01 9.393E+01 6.311E-03 2061 1.191E+02 6.506E+04 4.371E+00 2.798E-01 7.807E+01 5.245E-032062 9.897E+01 5.407E+04 3.633E+00 2.326E-01 6.488E+01 4.359E-032063 8.226E+01 4.494E+04 3.019E+00 1.933E-01 5.392E+01 3.623E-032064 6.836E+01 3.735E+04 2.509E+00 1.606E-01 4.482E+01 3.011E-032065 5.682E+01 3.104E+04 2.086E+00 1.335E-01 3.725E+01 2.503E-032066 4.722E+01 2.580E+04 1.733E+00 1.110E-01 3.096E+01 2.080E-032067 3.925E+01 2.144E+04 1.441E+00 9.222E-02 2.573E+01 1.729E-032068 3.262E+01 1.782E+04 1.197E+00 7.665E-02 2.138E+01 1.437E-032069 2.711E+01 1.481E+04 9.950E-01 6.370E-02 1.777E+01 1.194E-032070 2.253E+01 1.231E+04 8.270E-01 5.294E-02 1.477E+01 9.924E-04 Carbon dioxide NMOC REPORT - 10 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2071 1.872E+01 1.023E+04 6.873E-01 4.400E-02 1.228E+01 8.248E-042072 1.556E+01 8.502E+03 5.712E-01 3.657E-02 1.020E+01 6.855E-042073 1.293E+01 7.066E+03 4.747E-01 3.039E-02 8.479E+00 5.697E-042074 1.075E+01 5.872E+03 3.946E-01 2.526E-02 7.047E+00 4.735E-042075 8.934E+00 4.881E+03 3.279E-01 2.099E-02 5.857E+00 3.935E-042076 7.425E+00 4.056E+03 2.725E-01 1.745E-02 4.868E+00 3.270E-042077 6.171E+00 3.371E+03 2.265E-01 1.450E-02 4.045E+00 2.718E-042078 5.129E+00 2.802E+03 1.883E-01 1.205E-02 3.362E+00 2.259E-04 2079 4.262E+00 2.329E+03 1.565E-01 1.002E-02 2.794E+00 1.877E-04 2080 3.543E+00 1.935E+03 1.300E-01 8.324E-03 2.322E+00 1.560E-04 2081 2.944E+00 1.608E+03 1.081E-01 6.918E-03 1.930E+00 1.297E-04 2082 2.447E+00 1.337E+03 8.982E-02 5.750E-03 1.604E+00 1.078E-04 2083 2.034E+00 1.111E+03 7.465E-02 4.779E-03 1.333E+00 8.958E-05 2084 1.690E+00 9.234E+02 6.204E-02 3.972E-03 1.108E+00 7.445E-05 2085 1.405E+00 7.674E+02 5.156E-02 3.301E-03 9.209E-01 6.187E-05 2086 1.167E+00 6.378E+02 4.285E-02 2.743E-03 7.654E-01 5.142E-05 2087 9.703E-01 5.301E+02 3.562E-02 2.280E-03 6.361E-01 4.274E-05 2088 8.064E-01 4.405E+02 2.960E-02 1.895E-03 5.287E-01 3.552E-05 2089 6.702E-01 3.661E+02 2.460E-02 1.575E-03 4.394E-01 2.952E-05 2090 5.570E-01 3.043E+02 2.045E-02 1.309E-03 3.652E-01 2.454E-05 2091 4.629E-01 2.529E+02 1.699E-02 1.088E-03 3.035E-01 2.039E-05 2092 3.848E-01 2.102E+02 1.412E-02 9.041E-04 2.522E-01 1.695E-05 2093 3.198E-01 1.747E+02 1.174E-02 7.514E-04 2.096E-01 1.408E-052094 2.658E-01 1.452E+02 9.755E-03 6.245E-04 1.742E-01 1.171E-052095 2.209E-01 1.207E+02 8.107E-03 5.190E-04 1.448E-01 9.729E-062096 1.836E-01 1.003E+02 6.738E-03 4.314E-04 1.203E-01 8.086E-062097 1.526E-01 8.335E+01 5.600E-03 3.585E-04 1.000E-01 6.720E-062098 1.268E-01 6.927E+01 4.654E-03 2.980E-04 8.312E-02 5.585E-062099 1.054E-01 5.757E+01 3.868E-03 2.476E-04 6.909E-02 4.642E-062100 8.758E-02 4.785E+01 3.215E-03 2.058E-04 5.742E-02 3.858E-062101 7.279E-02 3.977E+01 2.672E-03 1.710E-04 4.772E-02 3.206E-062102 6.050E-02 3.305E+01 2.221E-03 1.422E-04 3.966E-02 2.665E-062103 5.028E-02 2.747E+01 1.846E-03 1.181E-04 3.296E-02 2.215E-06 2104 4.179E-02 2.283E+01 1.534E-03 9.819E-05 2.739E-02 1.841E-06 2105 3.473E-02 1.897E+01 1.275E-03 8.161E-05 2.277E-02 1.530E-06 2106 2.886E-02 1.577E+01 1.059E-03 6.783E-05 1.892E-02 1.271E-06 2107 2.399E-02 1.311E+01 8.805E-04 5.637E-05 1.573E-02 1.057E-06 2108 1.994E-02 1.089E+01 7.318E-04 4.685E-05 1.307E-02 8.782E-07 2109 1.657E-02 9.052E+00 6.082E-04 3.894E-05 1.086E-02 7.299E-07 2110 1.377E-02 7.523E+00 5.055E-04 3.236E-05 9.028E-03 6.066E-07 2111 1.145E-02 6.253E+00 4.201E-04 2.690E-05 7.503E-03 5.041E-07 2112 9.513E-03 5.197E+00 3.492E-04 2.235E-05 6.236E-03 4.190E-07 2113 7.906E-03 4.319E+00 2.902E-04 1.858E-05 5.183E-03 3.482E-07 2114 6.571E-03 3.590E+00 2.412E-04 1.544E-05 4.307E-03 2.894E-07 2115 5.461E-03 2.983E+00 2.004E-04 1.283E-05 3.580E-03 2.405E-07 2116 4.539E-03 2.479E+00 1.666E-04 1.066E-05 2.975E-03 1.999E-07 2117 3.772E-03 2.061E+00 1.385E-04 8.864E-06 2.473E-03 1.661E-07 2118 3.135E-03 1.713E+00 1.151E-04 7.367E-06 2.055E-03 1.381E-072119 2.605E-03 1.423E+00 9.564E-05 6.122E-06 1.708E-03 1.148E-072120 2.165E-03 1.183E+00 7.948E-05 5.088E-06 1.420E-03 9.538E-082121 1.800E-03 9.832E-01 6.606E-05 4.229E-06 1.180E-03 7.927E-08 NMOCCarbon dioxideYear REPORT - 11 JM - HIGH DIVERSION - Iowa City Landgem-v302 - 03-25-2020.xls 4/8/2020 Results (Continued) (Mg/year)(m 3/year)(av ft^3/min) (Mg/year)(m3 /year)(av ft^3/min)2122 1.496E-03 8.171E-01 5.490E-05 3.515E-06 9.805E-04 6.588E-08 2123 1.243E-03 6.791E-01 4.563E-05 2.921E-06 8.149E-04 5.475E-08 2124 1.033E-03 5.644E-01 3.792E-05 2.428E-06 6.773E-04 4.551E-08 2125 8.587E-04 4.691E-01 3.152E-05 2.018E-06 5.629E-04 3.782E-08 2126 7.136E-04 3.899E-01 2.619E-05 1.677E-06 4.678E-04 3.143E-08 2127 5.931E-04 3.240E-01 2.177E-05 1.394E-06 3.888E-04 2.612E-08 2128 4.929E-04 2.693E-01 1.809E-05 1.158E-06 3.231E-04 2.171E-08 2129 4.097E-04 2.238E-01 1.504E-05 9.627E-07 2.686E-04 1.804E-08 2130 3.405E-04 1.860E-01 1.250E-05 8.001E-07 2.232E-04 1.500E-08 2131 2.830E-04 1.546E-01 1.039E-05 6.649E-07 1.855E-04 1.246E-08 2132 2.352E-04 1.285E-01 8.633E-06 5.526E-07 1.542E-04 1.036E-08 2133 1.955E-04 1.068E-01 7.175E-06 4.593E-07 1.281E-04 8.609E-09 2134 1.624E-04 8.875E-02 5.963E-06 3.817E-07 1.065E-04 7.155E-09 2135 1.350E-04 7.376E-02 4.956E-06 3.173E-07 8.851E-05 5.947E-09 2136 1.122E-04 6.130E-02 4.119E-06 2.637E-07 7.356E-05 4.942E-09 2137 9.326E-05 5.095E-02 3.423E-06 2.191E-07 6.114E-05 4.108E-092138 7.751E-05 4.234E-02 2.845E-06 1.821E-07 5.081E-05 3.414E-092139 6.442E-05 3.519E-02 2.364E-06 1.514E-07 4.223E-05 2.837E-092140 5.354E-05 2.925E-02 1.965E-06 1.258E-07 3.510E-05 2.358E-092141 4.449E-05 2.431E-02 1.633E-06 1.046E-07 2.917E-05 1.960E-092142 3.698E-05 2.020E-02 1.357E-06 8.690E-08 2.424E-05 1.629E-092143 3.073E-05 1.679E-02 1.128E-06 7.222E-08 2.015E-05 1.354E-092144 2.554E-05 1.395E-02 9.376E-07 6.002E-08 1.674E-05 1.125E-092145 2.123E-05 1.160E-02 7.792E-07 4.988E-08 1.392E-05 9.351E-102146 1.764E-05 9.639E-03 6.476E-07 4.146E-08 1.157E-05 7.771E-102147 1.466E-05 8.011E-03 5.382E-07 3.446E-08 9.613E-06 6.459E-10 2148 1.219E-05 6.658E-03 4.473E-07 2.864E-08 7.989E-06 5.368E-10 2149 1.013E-05 5.533E-03 3.718E-07 2.380E-08 6.640E-06 4.461E-10 2150 8.418E-06 4.599E-03 3.090E-07 1.978E-08 5.518E-06 3.708E-10 2151 6.996E-06 3.822E-03 2.568E-07 1.644E-08 4.586E-06 3.082E-10 2152 5.815E-06 3.176E-03 2.134E-07 1.366E-08 3.812E-06 2.561E-10 2153 4.833E-06 2.640E-03 1.774E-07 1.136E-08 3.168E-06 2.129E-10 2154 4.016E-06 2.194E-03 1.474E-07 9.438E-09 2.633E-06 1.769E-10 2155 3.338E-06 1.824E-03 1.225E-07 7.844E-09 2.188E-06 1.470E-10 2156 2.774E-06 1.516E-03 1.018E-07 6.519E-09 1.819E-06 1.222E-10 2157 2.306E-06 1.260E-03 8.463E-08 5.418E-09 1.511E-06 1.016E-10 2158 1.916E-06 1.047E-03 7.034E-08 4.503E-09 1.256E-06 8.440E-11 2159 1.593E-06 8.700E-04 5.846E-08 3.742E-09 1.044E-06 7.015E-11 2160 1.324E-06 7.231E-04 4.858E-08 3.110E-09 8.677E-07 5.830E-112161 1.100E-06 6.010E-04 4.038E-08 2.585E-09 7.212E-07 4.845E-11 Carbon dioxide NMOCYear REPORT - 12 Attachment D Baseline, Low Diversion and High Diversion Organics Recovery Table YearGCCS Flow RateGCCS Collection EfficiencyTotal LFG Generation (Diverted Food Waste)Total LFG Generation (Reduced from Baseline)Total Landfill Gas - Recoverable (90% of Generation)GCCS Flow RateGCCS Collection EfficiencyTotal LFG Generation (Diverted Food Waste)Total LFG Generation (Reduced from Baseline)Total Landfill Gas - Recoverable (90% of Generation)GCCS Flow RateGCCS Collection Efficiency(Mg/year) (m3/year) (av ft^3/min)(Mg/year) (m3/year) (av ft^3/min)(av ft^3/min)(%) (av ft^3/min)(av ft^3/min)(av ft^3/min)(av ft^3/min)(%) (av ft^3/min)(av ft^3/min)(av ft^3/min)(av ft^3/min)(%)1972 - - - - - - - 0% - - - - 0% - - - - 0%1973 1,023 819,348 55 921 737,414 50 - 0% - 55 50 - 0% - 55 50 - 0%1974 1,991 1,594,307 107 1,792 1,434,876 96 - 0% - 107 96 - 0% - 107 96 - 0%1975 2,907 2,327,524 156 2,616 2,094,771 141 - 0% - 156 141 - 0% - 156 141 - 0%1976 3,773 3,021,489 203 3,396 2,719,340 183 - 0% - 203 183 - 0% - 203 183 - 0%1977 4,594 3,678,545 247 4,134 3,310,691 222 - 0% - 247 222 - 0% - 247 222 - 0%1978 5,371 4,300,899 289 4,834 3,870,809 260 - 0% - 289 260 - 0% - 289 260 - 0%1979 6,108 4,890,624 329 5,497 4,401,561 296 - 0% - 329 296 - 0% - 329 296 - 0%1980 6,764 5,416,240 364 6,088 4,874,616 328 - 0% - 364 328 - 0% - 364 328 - 0%1981 7,289 5,836,527 392 6,560 5,252,875 353 - 0% - 392 353 - 0% - 392 353 - 0%1982 7,780 6,229,766 419 7,002 5,606,790 377 - 0% - 419 377 - 0% - 419 377 - 0%1983 8,362 6,695,947 450 7,526 6,026,352 405 - 0% - 450 405 - 0% - 450 405 - 0%1984 8,983 7,193,151 483 8,085 6,473,836 435 - 0% - 483 435 - 0% - 483 435 - 0%1985 9,599 7,686,725 516 8,639 6,918,053 465 - 0% - 516 465 - 0% - 516 465 - 0%1986 10,117 8,101,358 544 9,105 7,291,222 490 - 0% - 544 490 - 0% - 544 490 - 0%1987 10,616 8,500,546 571 9,554 7,650,491 514 - 0% - 571 514 - 0% - 571 514 - 0%1988 11,090 8,880,503 597 9,981 7,992,453 537 - 0% - 597 537 - 0% - 597 537 - 0%1989 11,542 9,242,392 621 10,388 8,318,152 559 - 0% - 621 559 - 0% - 621 559 - 0%1990 11,958 9,575,388 643 10,762 8,617,849 579 - 0% - 643 579 - 0% - 643 579 - 0%1991 12,549 10,048,439 675 11,294 9,043,595 608 - 0% - 675 608 - 0% - 675 608 - 0%1992 12,900 10,329,730 694 11,610 9,296,757 625 - 0% - 694 625 - 0% - 694 625 - 0%1993 13,191 10,562,537 710 11,872 9,506,283 639 - 0% - 710 639 - 0% - 710 639 - 0%1994 13,496 10,806,887 726 12,146 9,726,199 654 - 0% - 726 654 - 0% - 726 654 - 0%1995 13,807 11,056,196 743 12,427 9,950,577 669 - 0% - 743 669 - 0% - 743 669 - 0%1996 14,121 11,307,198 760 12,709 10,176,478 684 - 0% - 760 684 - 0% - 760 684 - 0%1997 14,331 11,475,362 771 12,898 10,327,826 694 - 0% - 771 694 - 0% - 771 694 - 0%1998 14,610 11,698,973 786 13,149 10,529,075 707 - 0% - 786 707 - 0% - 786 707 - 0%1999 14,991 12,003,737 807 13,491 10,803,363 726 - 0% - 807 726 - 0% - 807 726 - 0%2000 15,154 12,134,747 815 13,639 10,921,272 734 - 0% - 815 734 - 0% - 815 734 - 0%2001 15,351 12,292,016 826 13,816 11,062,814 743 446 60% - 826 743 446 60% - 826 743 446 60%2002 15,706 12,576,589 845 14,135 11,318,930 761 456 60% - 845 761 456 60% - 845 761 456 60%2003 16,222 12,989,583 873 14,600 11,690,625 785 471 60% - 873 785 471 60% - 873 785 471 60%2004 16,714 13,383,530 899 15,042 12,045,177 809 486 60% - 899 809 486 60% - 899 809 486 60%2005 17,240 13,804,791 928 15,516 12,424,312 835 501 60% - 928 835 501 60% - 928 835 501 60%2006 17,808 14,260,172 958 16,028 12,834,155 862 517 60% - 958 862 517 60% - 958 862 517 60%2007 18,359 14,700,660 988 16,523 13,230,594 889 533 60% - 988 889 533 60% - 988 889 533 60%2008 19,012 15,223,545 1,023 17,110 13,701,190 921 552 60% - 1,023 921 552 60% - 1,023 921 552 60%2009 19,564 15,666,328 1,053 17,608 14,099,695 947 568 60% - 1,053 947 568 60% - 1,053 947 568 60%2010 20,098 16,093,780 1,081 18,088 14,484,402 973 584 60% - 1,081 973 584 60% - 1,081 973 584 60%2011 20,599 16,494,831 1,108 18,539 14,845,348 997 598 60% - 1,108 997 598 60% - 1,108 997 598 60%2012 21,023 16,834,480 1,131 18,921 15,151,032 1,018 611 60% - 1,131 1,018 611 60% - 1,131 1,018 611 60%2013 21,346 17,093,166 1,148 19,212 15,383,850 1,034 620 60% - 1,148 1,034 620 60% - 1,148 1,034 620 60%201421,645 17,332,497 1,165 19,481 15,599,247 1,048 629 60% - 1,165 1,048 629 60% - 1,165 1,048 629 60%2015 21,983 17,602,567 1,183 19,784 15,842,310 1,064 591 56%- 1,183 1,064 591 56%- 1,183 1,064 591 56%2016 22,415 17,949,216 1,206 20,174 16,154,295 1,085 664 61%- 1,206 1,085 664 61%- 1,206 1,085 664 61%2017 22,867 18,311,080 1,230 20,581 16,479,972 1,107 862 78%- 1,230 1,107 862 78%- 1,230 1,107 862 78%2018 23,436 18,766,372 1,261 21,092 16,889,734 1,135 789 70%- 1,261 1,135 789 70%- 1,261 1,135 789 70%201924,021 19,234,567 1,292 21,619 17,311,110 1,163 895 77%- 1,292 1,163 895 77%- 1,292 1,163 895 77%2020 24,387 19,528,362 1,312 21,949 17,575,526 1,181 945 80% - 1,312 1,181 945 80% - 1,312 1,181 945 80%2021 24,741 19,811,272 1,331 22,267 17,830,145 1,198 958 80% - 1,331 1,198 958 80% - 1,331 1,198 958 80%2022 25,081 20,083,971 1,349 22,573 18,075,574 1,214 972 80% 13 1,337 1,203 962 80% 32 1,318 1,186 949 80%2023 25,410 20,347,093 1,367 22,869 18,312,384 1,230 984 80% 23 1,344 1,209 968 80% 58 1,309 1,178 942 80%2024 25,727 20,601,234 1,384 23,155 18,541,111 1,246 997 80% 32 1,352 1,217 973 80% 81 1,304 1,173 939 80%2025 26,034 20,846,956 1,401 23,431 18,762,261 1,261 1,072 85% 40 1,361 1,225 1,041 85% 99 1,302 1,171 996 85%2026 26,331 21,084,787 1,417 23,698 18,976,309 1,275 1,084 85% 46 1,371 1,234 1,049 85% 115 1,302 1,172 996 85%2027 26,619 21,315,224 1,432 23,957 19,183,702 1,289 1,096 85% 51 1,381 1,243 1,056 85% 128 1,304 1,174 998 85%2028 26,898 21,538,735 1,447 24,208 19,384,862 1,302 1,107 85% 56 1,392 1,252 1,065 85% 139 1,308 1,177 1,001 85%2029 27,169 21,755,761 1,462 24,452 19,580,185 1,316 1,118 85% 59 1,402 1,262 1,073 85% 148 1,313 1,182 1,005 85%2030 27,433 21,966,715 1,476 24,689 19,770,043 1,328 1,129 85% 62 1,413 1,272 1,081 85% 156 1,320 1,188 1,010 85%2031 27,689 22,171,988 1,490 24,920 19,954,789 1,341 1,140 85% 65 1,425 1,282 1,090 85% 163 1,327 1,194 1,015 85%2032 27,939 22,371,946 1,503 25,145 20,134,752 1,353 1,150 85% 67 1,436 1,292 1,098 85% 169 1,334 1,201 1,021 85%2033 28,182 22,566,936 1,516 25,364 20,310,243 1,365 1,160 85% 69 1,447 1,302 1,107 85% 174 1,343 1,208 1,027 85%2034 28,420 22,757,283 1,529 25,578 20,481,554 1,376 1,170 85% 71 1,458 1,312 1,115 85% 178 1,351 1,216 1,034 85%2035 28,652 22,943,292 1,542 25,787 20,648,963 1,387 1,179 85% 73 1,469 1,322 1,124 85% 182 1,360 1,224 1,040 85%2036 28,879 23,125,252 1,554 25,991 20,812,726 1,398 1,189 85% 74 1,480 1,332 1,132 85% 185 1,369 1,232 1,047 85%2037 29,102 23,303,433 1,566 26,192 20,973,090 1,409 1,198 85% 75 1,491 1,342 1,140 85% 188 1,378 1,240 1,054 85%2038 29,320 23,478,092 1,577 26,388 21,130,283 1,420 1,207 85% 76 1,501 1,351 1,149 85% 190 1,387 1,249 1,061 85%2039 29,534 23,649,469 1,589 26,581 21,284,522 1,430 1,216 85% 77 1,512 1,361 1,157 85% 192 1,397 1,257 1,068 85%LOW DIVERSIONHIGH DIVERSIONTotal Landfill Gas - GenerationTotal Landfill Gas - Recoverable (90% of Generation)BASELINE 2040 29,744 23,817,789 1,600 26,770 21,436,010 1,440 1,224 85% 78 1,523 1,370 1,165 85% 194 1,406 1,265 1,076 85%2041 29,951 23,983,266 1,611 26,956 21,584,940 1,450 1,233 85% 78 1,533 1,380 1,173 85% 196 1,415 1,274 1,083 85%2042 30,154 24,146,101 1,622 27,139 21,731,491 1,460 1,241 85% 79 1,543 1,389 1,181 85% 198 1,425 1,282 1,090 85%2043 30,355 24,306,482 1,633 27,319 21,875,834 1,470 1,249 85% 80 1,553 1,398 1,188 85% 199 1,434 1,290 1,097 85%2044 30,552 24,464,587 1,644 27,497 22,018,128 1,479 1,331 90% 80 1,563 1,407 1,266 90% 201 1,443 1,299 1,169 90%2045 28,847 23,099,714 1,552 25,963 20,789,743 1,397 1,257 90% 67 1,485 1,336 1,203 90% 169 1,383 1,245 1,121 90%2046 27,140 21,732,748 1,460 24,426 19,559,473 1,314 1,183 90% 56 1,404 1,264 1,137 90% 140 1,320 1,188 1,069 90%2047 25,534 20,446,675 1,374 22,981 18,402,007 1,236 1,113 90% 47 1,327 1,194 1,075 90% 117 1,257 1,132 1,018 90%2048 24,023 19,236,707 1,293 21,621 17,313,036 1,163 1,047 90% 39 1,254 1,128 1,016 90% 97 1,196 1,076 968 90%2049 22,602 18,098,341 1,216 20,341 16,288,507 1,094 985 90% 32 1,184 1,065 959 90% 80 1,136 1,022 920 90%2050 21,264 17,027,339 1,144 19,138 15,324,605 1,030 927 90% 27 1,117 1,006 905 90% 67 1,077 969 873 90%2051 20,006 16,019,717 1,076 18,005 14,417,745 969 872 90% 22 1,054 949 854 90% 56 1,021 919 827 90%2052 18,822 15,071,722 1,013 16,940 13,564,550 911 820 90% 18 994 895 805 90% 46 966 870 783 90%2053 17,708 14,179,826 953 15,937 12,761,843 857 772 90% 15 937 844 759 90% 38 914 823 741 90%2054 16,660 13,340,710 896 14,994 12,006,639 807 726 90% 13 884 795 716 90% 32 864 778 700 90%2055 15,674 12,551,250 843 14,107 11,296,125 759 683 90% 11 833 749 674 90% 27 817 735 662 90%2056 14,747 11,808,508 793 13,272 10,627,657 714 643 90% 9 785 706 636 90% 22 771 694 625 90%2057 13,874 11,109,718 746 12,487 9,998,747 672 605 90% 7 739 665 599 90% 18 728 655 590 90%2058 13,053 10,452,281 702 11,748 9,407,053 632 569 90% 6 696 627 564 90% 15 687 618 557 90%2059 12,281 9,833,749 661 11,053 8,850,374 595 535 90% 5 656 590 531 90% 13 648 583 525 90%2060 11,554 9,251,820 622 10,399 8,326,638 559 504 90% 4 617 556 500 90% 11 611 550 495 90%2061 10,870 8,704,327 585 9,783 7,833,894 526 474 90% 3 581 523 471 90% 9 576 518 467 90%2062 10,227 8,189,233 550 9,204 7,370,310 495 446 90% 3 547 493 443 90% 7 543 489 440 90%2063 9,622 7,704,621 518 8,660 6,934,159 466 419 90% 2 515 464 417 90% 6 512 460 414 90%2064 9,052 7,248,686 487 8,147 6,523,818 438 395 90% 2 485 437 393 90% 5 482 434 390 90%2065 8,517 6,819,733 458 7,665 6,137,759 412 371 90% 2 457 411 370 90% 4 454 409 368 90%2066 8,013 6,416,163 431 7,211 5,774,547 388 349 90% 1 430 387 348 90% 3 428 385 346 90%2067 7,538 6,036,475 406 6,785 5,432,828 365 329 90% 1 404 364 328 90% 3 403 362 326 90%2068 7,092 5,679,256 382 6,383 5,111,330 343 309 90% 1 381 343 308 90% 2 379 341 307 90%2069 6,673 5,343,176 359 6,005 4,808,858 323 291 90% 1 358 322 290 90% 2 357 321 289 90%2070 6,278 5,026,984 338 5,650 4,524,286 304 274 90% 1 337 303 273 90% 2 336 302 272 90%2071 5,906 4,729,504 318 5,316 4,256,553 286 257 90% 1 317 286 257 90% 1 316 285 256 90%2072 5,557 4,449,627 299 5,001 4,004,664 269 242 90% 0 299 269 242 90% 1 298 268 241 90%2073 5,228 4,186,312 281 4,705 3,767,681 253 228 90% 0 281 253 228 90% 1 280 252 227 90%2074 4,919 3,938,580 265 4,427 3,544,722 238 214 90% 0 264 238 214 90% 1 264 237 214 90%2075 4,628 3,705,508 249 4,165 3,334,957 224 202 90% 0 249 224 201 90% 1 248 223 201 90%2076 4,354 3,486,228 234 3,918 3,137,605 211 190 90% 0 234 211 190 90% 1 234 210 189 90%2077 4,096 3,279,924 220 3,686 2,951,932 198 179 90% 0 220 198 178 90% 0 220 198 178 90%2078 3,854 3,085,829 207 3,468 2,777,246 187 168 90% 0 207 186 168 90% 0 207 186 168 90%2079 3,626 2,903,219 195 3,263 2,612,897 176 158 90% 0 195 175 158 90% 0 195 175 158 90%2080 3,411 2,731,416 184 3,070 2,458,275 165 149 90% 0 183 165 149 90% 0 183 165 148 90%2081 3,209 2,569,780 173 2,888 2,312,802 155 140 90% 0 173 155 140 90% 0 172 155 140 90%2082 3,019 2,417,709 162 2,717 2,175,938 146 132 90% 0 162 146 132 90% 0 162 146 131 90%2083 2,841 2,274,636 153 2,557 2,047,173 138 124 90% 0 153 137 124 90% 0 153 137 124 90%2084 2,673 2,140,031 144 2,405 1,926,028 129 116 90% 0 144 129 116 90% 0 144 129 116 90%2085 2,514 2,013,391 135 2,263 1,812,052 122 110 90% 0 135 122 110 90% 0 135 122 109 90%2086 2,366 1,894,245 127 2,129 1,704,820 115 103 90% 0 127 115 103 90% 0 127 114 103 90%2087 2,226 1,782,150 120 2,003 1,603,935 108 97 90% 0 120 108 97 90% 0 120 108 97 90%2088 2,094 1,676,688 113 1,884 1,509,019 101 91 90% 0 113 101 91 90% 0 113 101 91 90%2089 1,970 1,577,467 106 1,773 1,419,720 95 86 90% 0 106 95 86 90% 0 106 95 86 90%2090 1,853 1,484,117 100 1,668 1,335,706 90 81 90% 0 100 90 81 90% 0 100 90 81 90%2091 1,744 1,396,292 94 1,569 1,256,663 84 76 90% 0 94 84 76 90% 0 94 84 76 90%2092 1,641 1,313,664 88 1,476 1,182,298 79 71 90% 0 88 79 71 90% 0 88 79 71 90%2093 1,543 1,235,926 83 1,389 1,112,333 75 67 90% 0 83 75 67 90% 0 83 75 67 90%2094 1,452 1,162,788 78 1,307 1,046,509 70 63 90% 0 78 70 63 90% 0 78 70 63 90%2095 1,366 1,093,978 74 1,230 984,580 66 60 90% 0 73 66 60 90% 0 73 66 60 90%2096 1,285 1,029,240 69 1,157 926,316 62 56 90% 0 69 62 56 90% 0 69 62 56 90%2097 1,209 968,333 65 1,088 871,499 59 53 90% 0 65 59 53 90% 0 65 59 53 90%2098 1,138 911,030 61 1,024 819,927 55 50 90% 0 61 55 50 90% 0 61 55 50 90%2099 1,070 857,118 58 963 771,406 52 47 90% 0 58 52 47 90% 0 58 52 47 90%2100 1,007 806,396 54 906 725,757 49 44 90% 0 54 49 44 90% 0 54 49 44 90%2101 947 758,677 51 853 682,809 46 41 90% 0 51 46 41 90% 0 51 46 41 90%2102 891 713,781 48 802 642,402 43 39 90% 0 48 43 39 90% 0 48 43 39 90%2103 839 671,541 45 755 604,387 41 37 90% 0 45 41 37 90% 0 45 41 37 90%2104 789 631,802 42 710 568,622 38 34 90% 0 42 38 34 90% 0 42 38 34 90%2105 742 594,414 40 668 534,972 36 32 90% 0 40 36 32 90% 0 40 36 32 90%2106 698 559,238 38 629 503,314 34 30 90% 0 38 34 30 90% 0 38 34 30 90%2107 657 526,144 35 591 473,530 32 29 90% 0 35 32 29 90% 0 35 32 29 90%2108 618 495,009 33 556 445,508 30 27 90% 0 33 30 27 90% 0 33 30 27 90%2109 582 465,716 31 523 419,144 28 25 90% 0 31 28 25 90% 0 31 28 25 90%2110 547 438,156 29 492 394,341 26 24 90% 0 29 26 24 90% 0 29 26 24 90%2111 515 412,228 28 463 371,005 25 22 90% 0 28 25 22 90% 0 28 25 22 90%2112484 387,833 26 436 349,050 23 21 90% 0 26 23 21 90% 0 26 23 21 90% Attachment E WWTP Biogas Analysis ANALYTICAL SOLUTION, INC. (AnSol) 10/6/10 Analytical Report Sample log # :K0923b Analytical Solution, Inc., 7320 S. Madison, Unit 500, Willowbrook, Illinois 60527 Page 1 of 3 Purchase Order #: E-mail Customer Project: Company : Brown and Caldwell Requester : Nancy Andrews Address : Iowa City WWTP Phone: (651) 468-2043 410 E Wahsington St. Fax: Iowa City, IA 52240 E-mail : Attn. Ben Clark Sample Description : Digester gas in Tedlar bag Received Date : 9/23/10 Number of Samples : 1 Total Report Page: 3 Report Summary: Results are tabulated in the following pages. Submitted by: Sherman S. Chao, Ph.D. Tel: (630) 230-9378, Fax: (630) 230-9376 Disclaimer: Neither AnSol nor any person acting on behalf of AnSol assumes any liability with respect to the use of, or for damages resulting from the use of, any information presented in this report. ANALYTICAL SOLUTION, INC. (AnSol) 10/6/10 Analytical Report Sample log # :K0923b Analytical Solution, Inc., 7320 S. Madison, Unit 500, Willowbrook, Illinois 60527 Page 2 of 3 GAS COMPONENT ANALYSIS Sample ID: Conc. Unit K0923b01 Biogas, Iowa City WWTP, 9/21/10, 1330 Methane % 62.5 Carbon dioxide % 36.9 Nitrogen % 0.40 Oxygen % 0.14 Hydrogen sulfide ppmv 98 Relative Density (Specific Gravity) 635 GHV, dry (14.73 psi), based on 4 comp. Btu/scf 0.915 Note: Major component concentrations were normalized to 100%. Oxygen and Argon cannot be separated; therefore, the oxygen result includes a small amount of Argon. Some results were reported with additional significance for reference. ND=Not Determined ANALYTICAL SOLUTION, INC. (AnSol) 10/6/10 Analytical Report Sample log # :K0923b Analytical Solution, Inc., 7320 S. Madison, Unit 500, Willowbrook, Illinois 60527 Page 3 of 3 Compound Speciation – Siloxanes K0923b01 Biogas, Iowa City WWTP, 9/21/10, 1330 Organic Silicon (siloxanes) ppmv as Si ppmv Tetramethyl silane <0.05 <0.05 Trimethyl silanol <0.05 <0.05 Hexamethyldisiloxane (L2) <0.05 <0.025 Hexamethylcyclotrisiloxane (D3) 0.16 0.054 Octamethyltrisiloxane (L3) <0.05 <0.02 Octamethylcyclotetrasiloxane (D4) 3.96 0.99 Decamethyltetrasiloxane (L4) <0.05 <0.01 Decamethylcyclopentasiloxane (D5) 215 43 Dodecamethylpentasiloxane (L5) <0.05 <0.01 Dodecamethylcyclohexasiloxane (D6) 2.27 0.38 Others, as L2 0.11 0.055 Total: 222 Total (Si, mg /M3): 263 Note: Some results may be reported with additional significance for reference. The normal detection limit is 0.05-0.1 ppmv Si. It should be noted that Tedlar bag can often contributes a background level of siloxanes due probably to the use of silicone-based lubricant on the valve stem. Attachment F MidAmerican Energy RNG Transportation - Sample Agreement CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 1 - MIDAMERICAN ENERGY COMPANY RENEWABLE GAS TRANSPORTATION SERVICE AGREEMENT This Renewable Gas Transportation Service Agreement (“Agreement”) is made this ____ day of _______________________, 2018, by and between MidAmerican Energy Company (“MidAmerican”) and XXX (the “Customer”). MidAmerican and Customer are referred to individually as a “Party” and collectively as the “Parties”. Whereas, Customer seeks to construct and maintain a biogas production facility on its premises. Customer intends to contract the sale of its biogas product to Iowa gas transportation customers for receipt and consumption within the legal boundaries of the State of Iowa (“Project”). Whereas, Customer intends to deliver its biogas through MidAmerican’s natural gas distribution system, which will require MidAmerican to invest in and construct additional facilities. Now, in consideration of the mutual covenants herein contained, the sufficiency and adequacy of which are hereby acknowledged, the Parties agree to the following: 1. TERM This Agreement becomes effective on the date of its execution, and remains in full force and effect until the three (3) year anniversary of the In-service Date as identified in Section 4(a)(i) of this Agreement (this three (3) year period is referred to as the “Initial Term”). Upon expiration of the Initial Term, this Agreement shall automatically renew for successive one (1) year terms, unless and until terminated by either party upon thirty (30) days written notice effective the end of a gas billing period. Notwithstanding anything contained in this Agreement to the contrary, neither party shall have the right to terminate this Agreement during the Initial Term. 2. CUSTOMER IDENTIFICATION Customer Name: Customer Account Number: Customer Address – Physical: Customer Email(s) – Notices: Customer Address – Invoices Customer System Contact: Phone: Fax: Emergency Phone: Customer Meter Number(s): CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 2 - Maximum Daily Requirement (MDR) (Therms): Maximum Hourly Quantity (MHQ) (Therms): Rate Designation PRG: Number of Meters: Current Rate Code 3. CONSTRUCTION OF NATURAL GAS FACILITIES (“FACILITIES”) a. Upon receipt of payment as set forth in Section 4(b) below, MidAmerican will take the following actions to provide the natural gas service requested by Customer, collectively referred to as “MidAmerican Work.” All facilities referred to in this subsection (3)(a) are considered “MidAmerican Facilities.” i. Install a X-inch, Class 150 ANSI manually operated isolation valve at the transfer point for possible isolation of MidAmerican’s facilities from the Customer’s facilities. ii. Install equipment to enable it to connect to and access information from Customer owned and operated chromatograph, gas quality and moisture analyzer equipment to monitor gas quality. iii. Install flow computer and remote control valves to allow MidAmerican Gas Control to monitor and shut down the injection of renewable gas into MidAmerican’s system should gas quality be non-compatible. iv. Install required regulators and other equipment as needed to safely inject renewable gas into MidAmerican’s distribution system. v. Install meter equipment at the connection point to measure the renewable gas injected. vi. Install odorizer equipment at the transfer point. vii. Reserve access rights to Customer’s property to test, examine, and perform maintenance on MidAmerican’s facilities. viii. Provide a site plan showing the metering points and route on Customer’s property. ix. Provide engineering drawings showing the delineation points of responsibility for Customer’s construction and MidAmerican’s construction. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 3 - b. MidAmerican Facilities will be located in XXX located in XXX, Iowa. The XXX Plant address is Street, City, State Zipcode. c. MidAmerican will seek acquisition, and Customer agrees to reasonably and in good faith assist MidAmerican in acquisition, of all permits and authorizations, easements and right-of-way necessary for construction and operation of MidAmerican Facilities. d. MidAmerican will not begin construction of MidAmerican Facilities until receipt of all required payments, surety, easements, permits, Contribution in aid of construction (CIAC) and access rights from Customer or from a third party on behalf of Customer. e. Customer will complete the following at its cost, referred to as “Customer Work.” All facilities in this subsection (3)(e) are to be considered “Customer Facilities.” i. Install remote pressure control to allow up to XXX therms per hour of renewable gas to be injected into MidAmerican’s distribution system during summer or winter load conditions. ii. Install pressure control and overpressure protection on the Customer’s piping upstream of the injection meter. iii. Install gas quality measurement equipment at the Customer’s site and provide gas quality information to MidAmerican Gas Control. iv. Gas quality measurement equipment shall include a gas chromatograph, oxygen, sulfur and moisture analyzers. v. Provide MidAmerican a primary wireless and backup communication line to Customer’s gas quality equipment (including control computers). The equipment must be compatible with MidAmerican’s control system and must have alarm capabilities that MidAmerican can monitor. Currently, MidAmerican’s gas control system supports the ModBus ASCII and ModBus RTU protocols. vi. Customer is required to have facilities in place to re-process, store or flare the gas should MidAmerican be unable to take the gas due to reduced demand on MidAmerican’s system or because of gas quality issues. Reduced demand shall mean Customer is not consuming gas downstream of the injection point at a rate that is equal to or greater than three times the biogas injection volume. f. Customer is required to have facilities in place to re-process, store or flare the biogas should MidAmerican be unable to take the biogas due to reduced demand on MidAmerican’s system or because of gas quality issues. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 4 - g. Customer is required to have H2S sensors, with audible alarms, and a wind sock in the process area near the MidAmerican exchange point, to protect MidAmerican employees in the event of an H2S leak. 4. PAYMENT a. Assumptions and Cost Estimates i. Assumptions. The cost estimate provided below is based on the following assumptions (“Assumptions”) regarding renewable gas injection. In the event of any changes in these Assumptions, the Parties shall negotiate in good faith to amend this Agreement: • Peak Day: XXX therms per day • Annualized Peak Load: XXX therms • Peak Hour Load (MHQ): XXX therms per hour • Delivery Pressure: XXX psig • Plant Operation: 24 hours/day, 365 days/year • Estimated In-Service: The in-service date is the date the meter becomes active. • Revenue Period: The revenue period is defined as the third (3) month after the in-service date to the thirty- eighth (38) month ii. Estimates. The construction estimate is an estimate and the cost of the MidAmerican Work is subject to change as the engineering specifications for the MidAmerican Facilities are refined to include any changes in Customer’s renewable gas injection, or costs increase for any component of the MidAmerican Facilities, including winter construction charges and increased permit fees. Line Item Cost Total Project Construction Estimate $ XXX 3-Year Net Revenue Estimate $ XXX Cost Of Construction Minus 3-Year Net Revenue $ (XXX) Estimated Total Contribution in Aid of Construction (CIAC) $ XXX b. Payment of Estimated Contribution in Aid of Construction (CIAC). Based on the above Assumptions and estimates, Customer must pay an estimated CIAC of ($0.00) to MidAmerican within 90 days of Agreement execution. The estimated CIAC is considered non-taxable contribution of capital. In the event that the Internal Revenue Service finds the reimbursement to be taxable income to MidAmerican, MidAmerican reserves the right to bill Customer for the resulting tax effects, and Customer agrees to pay the amount. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 5 - c. Post-Construction Reconciliation. After the MidAmerican Work is complete, MidAmerican will provide Customer a detailed calculation of the final actual CIAC amount. If the estimated CIAC is less than MidAmerican’s actual construction and permit costs, less the estimated three-year revenue credit, Customer shall pay the difference to MidAmerican within 30 days of receipt of MidAmerican’s invoice (“Make-Up Contribution”). If the estimated CIAC is greater than the actual construction and permit costs, less the estimated three-year revenue credit, MidAmerican will refund the difference to Customer within 30 days of such determination. The refund will not exceed the amount of the CIAC. d. Startup Support Costs. Any incremental cost incurred by MidAmerican to assist in startup will be billed monthly to the Customer. This only includes costs above-and-beyond the anticipated maintenance charges and will discontinue once production is underway. e. 3-Year Revenue Reconciliation. MidAmerican will provide Customer a detailed actual monthly revenue reconciliation using the actual revenues received during the Revenue Period. If MidAmerican’s actual 3-year net revenues from Customer are less than the 3-year Net Revenue Estimate in Section 4(a), Customer shall pay the difference to MidAmerican within 30 days of MidAmerican’s invoice (“Revenue Credit Make-Up Contribution”). 5. CHANGES TO PROJECT If Customer chooses to expand or decrease its operation to the extent it anticipates a load at the Project different than that which is assumed in the Assumptions or cost estimates in Section 4(a) of this Agreement, Customer must notify MidAmerican. MidAmerican will update its system models and the parties can: a. Plan the modifications necessary to the facilities of each party. b. Develop a schedule for ordering and installation of equipment. c. Determine new pricing for the modification. MidAmerican will act with reasonable diligence and in good faith in the implementation of any such modification. If a load change, either presently or at some point in the future, requires MidAmerican to secure an additional or amended pipeline permit from the Iowa Utilities Board, Customer recognizes that modification of the facilities may not commence without Iowa Utilities Board approval. It is the responsibility of the Customer to determine what, if any, regulatory approvals or permits may be necessary for Customer to perform this Agreement. Customer shall provide copies of all such approvals or permits to MidAmerican. Customer acknowledges MidAmerican will not commence construction of the MidAmerican Work until all such approvals or permits have been obtained and copies have been provided to MidAmerican including any that may be required from the Iowa Utilities Board. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 6 - 6. CUSTOMER GAS SUPPLIED INTO MIDAMERICAN’S SYSTEM a. Customer-supplied gas to MidAmerican’s system must meet these specifications: Component Concentration Btu Content Within 5% of serving pipeline average Carbon dioxide < 3% by volume Nitrogen < 4% by volume Total Inerts (N2+CO2) < 5% by volume Oxygen < 0.3% by volume * Water < 5 lb./mmscf Hydrogen Sulfide < 0.25 grain/Ccf Total Sulfur < 20 grain/Ccf Volatile Organic Compounds (VOC’s) 0 ppm Total Silicon <0.01 ppm * If the Customer is consuming gas downstream of the injection point at a rate that is equal to or greater than three times the biogas injection volume, the oxygen limit will be increased to <= 0.5% from <= 0.3%. In the event that the Customer consumes less than three times the biogas injected volume, the oxygen limit will be <= 0.3%. b. Customer’s renewable gas shall meet the minimum quality specifications stated above and be comparable to and interchangeable with gas purchased from MidAmerican’s suppliers to be considered “compatible” with MidAmerican’s system requirements. The volume of renewable gas injected into MidAmerican’s system cannot exceed 50% of total natural gas supply downstream of the injection point. Customer must provide MidAmerican Gas Control with hourly gas quality values to ensure quality compliance. MidAmerican may cut off the supply of renewable gas should it become “non-compatible” with a constituent, downstream customer requirements, or if the hourly information is not received by MidAmerican Gas Control. It will be the responsibility of the Customer to correct any “non-compatible” gas quality issue before injections of renewable gas will be allowed to resume. c. Customer shall provide their MidAmerican Key Account Manager with annual calibration reports by February 1 of each year verifying all gas quality monitoring equipment is operating properly. Customer is responsible for any maintenance or repairs to the gas quality measuring equipment. Customer is responsible for obtaining any permits required to flare or dispose of “non-compatible” gas. MidAmerican reserves the right to discontinue injections of Customer’s renewable gas at any time, if gas does not meet the minimum gas quality specifications set forth in Section 6(a) above. d. To facilitate proper odorization and corrosion analysis, Customer shall provide MidAmerican a lab analysis of the proposed renewable gas prior to final engineering design. Customer shall also provide MidAmerican a lab analysis of CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 7 - all compounds found within the produced renewable gas including, but not limited to, siloxanes, total silicon, hydrogen sulfide, halogens, carcinogens and any volatile organic compounds prior to startup and on a quarterly basis thereafter. e. Customer shall provide MidAmerican access and a plant escort to odorization and metering equipment located on customer’s property as needed. f. If MidAmerican incurs any costs as a result of Customer-produced renewable gas that fails to meet the specifications set forth in this Agreement, Customer shall indemnify and hold MidAmerican harmless from any such costs or related claims or causes of action. g. Customer shall provide MidAmerican with a lab analysis of the proposed renewable gas prior to final engineering design. Customer shall also provide MidAmerican, on a quarterly basis, a lab analysis of all compounds found within the produced renewable gas including, but not limited to, Siloxanes, Total Silicon, Hydrogen Sulfide, Halogens, Carcinogens and any Volatile Organic Compounds. h. MidAmerican reserves the right to amend the minimum quality specifications should a qualifying regulatory body revise or enact a gas quality standard, or an unacceptable compound is found in the renewable gas produced. 7. NATURAL GAS DELIVERY FOR SUPPLY GAS – THIRD PARTY Pursuant to the MidAmerican’s Rate PRG Tariff (Producers of Renewable Gas Transportation Service), Customer must contract for and deliver renewable gas injected into the MidAmerican distribution system to an Iowa gas transportation customer or third party, and such renewable gas must be consumed by one or more customers located on MidAmerican’s natural gas distribution system within the legal boundaries of the State of Iowa. Customer is eligible for any service options available to a Rate PRG gas transportation customer. The Customer Rate PRG charges shall be applied as follows: Basic Service Charge: Shall be equal to the sum of the customer charge and the transportation administrative charge pursuant to Rate 90T (Large General Transportation Service), which is subject to amendment upon action taken by any applicable federal or state regulatory body. In addition to these charges, a fixed investment charge of $1,422 per month shall be added to the Basic Service Charge. Commodity Charge: The Commodity Charge shall be $0.00902 per therm. Demand MDR (Maximum Daily Requirement) Charge: The Demand MDR Charge shall be zero. Quality Monitoring Calculated average based on actual costs for the preceding CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 8 - Charge: twelve (12) months and updated annually. Initial charge for year one shall be $1,055 per month based on estimated costs. The Quality Monitoring Charge shall be added to the Basic Service Charge on the customer’s bill. Maintenance Charge: Calculated average based on actual costs for the preceding twelve (12) months and updated annually. Initial charge for year one will be $40 per month based on estimated costs. The Maintenance Charge shall be added to the Basic Service Charge on the customer’s bill. Odorization Charge: Calculated based on actual odorant required per therm and updated annually. Initial charge for year one shall be $0.00019 per therm based on estimated costs. The Odorization Charge shall be added to the Commodity Charge on the customer’s bill. If, due to the composition of such renewable gas, an alternative odorization is required, Customer agrees to pay any incremental cost. Retention Percentage: Customer will not be responsible for retention as this will be recovered from the consuming gas transportation end-users on MidAmerican’s natural gas distribution system. Minimum Monthly Bill: The sum of the Basic Service Charge, Demand MDR Charge, Quality Monitoring Charge and Maintenance Charge plus the Commodity Charge and Odorization Charge for all therms received by MidAmerican on the Customer’s behalf. 8. PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION The Parties agree that their respective Facilities shall be in compliance with and subject to all applicable regulations. Additionally, the Parties agree to gas quality requirements found in Attachment B to this Agreement. Upon approval by any governmental body with jurisdiction, the requirements set forth in Attachment B shall be considered amended to include such changes and any other changes which become effective by operation of law. 9. TELEMETRY INSTALLATION CHARGES To provide gas transportation service under the terms of the Rate PRG Tariff, Customer must have telemetry equipment installed. (See Attachment A for Gas Transportation Customer Requirements). Pursuant to the Rate PRG Tariff, the Customer will be billed for all costs and charges relating to the installation of the required telemetry equipment. This $5,821.06 charge plus applicable tax will be considered a non-refundable contribution in aid of construction. MidAmerican will retain ownership of the equipment and be responsible for maintenance. Telemetry installation charges will include an income tax gross-up of the contribution amount, where appropriate. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 9 - 10. COMPLIANCE To the extent MidAmerican’s tariffs on file with the Iowa Utilities Board do not conflict with the express terms of this Agreement, said tariffs are fully applicable to Customer. 11. CONFIDENTIALITY Neither party shall disclose this Contract, or any portion thereof, to any person, except employees of the parties or regulatory bodies having jurisdiction, or as otherwise required by law, without the written permission of the other party. If this Contract or any portion thereof is disclosed to, or filed with any regulatory body or disclosed as otherwise required by law, the disclosing or filing party shall request the regulatory body, other entity or person receiving the Contract or any portion thereof, to afford the Contract, or the portion thereof, confidential treatment and, concurrently with the filing or disclosure, shall advise the other party of the filing or disclosure provided that MidAmerican shall not be required to advise Customer of any filing or disclosure to the Iowa Utilities Board or its successor agencies. 12. MISCELLANEOUS a. This Agreement may be executed in counterparts, and each one taken together shall constitute one and the same instrument. b. This Agreement constitutes the entire Agreement between the Parties. No representation or agreement, oral or otherwise, shall modify the subject matter hereof unless and until such representation or agreement is reduced to writing and executed by authorized representatives of both Parties. c. This Agreement may not be amended, modified or supplemented, except in writing signed by both Parties. No delay on the part of either Party in exercising any right or remedy under this Agreement shall operate as a waiver thereof. No prior waiver on the part of either Party, nor any single or partial exercise of any right under this Agreement shall preclude any other further exercise thereof or any other right under this Agreement. d. Except with respect to those material provisions, the absence of which would render this Agreement impossible to perform, any article, section, paragraph or provision declared or rendered unlawful by a court of law or regulatory agency with jurisdiction over the Parties or subject matter hereof, or deemed unlawful because of a statutory change, will not otherwise affect the lawful obligations that arise under the Agreement. In the event any provision of this Agreement is declared invalid, the Parties shall promptly negotiate in good faith to restore this Agreement to its original intent and effect to the maximum extent possible, consistent with the relevant regulatory or judicial decision. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 10 - e. THE LAWS OF THE STATE OF IOWA SHALL CONTROL THE OBLIGATIONS AND PROCEDURES ESTABLISHED BY THIS AGREEMENT AND THE PERFORMANCE AND ENFORCEMENT OF IT. f. TO THE FULLEST EXTENT PERMITTED BY LAW, CUSTOMER AND COMPANY HERETO WAIVE ANY RIGHT EACH MAY HAVE TO A TRIAL BY JURY IN RESPECT OF LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT. EACH FURTHER WAIVES ANY RIGHT TO CONSOLIDATE ANY ACTION IN WHICH A JURY TRIAL HAS BEEN WAIVED WITH ANY OTHER ACTION IN WHICH A JURY TRIAL CANNOT BE OR HAS NOT BEEN WAIVED. g. Each Party represents that it has the necessary corporate and/or legal authority to enter into this Agreement and to perform the obligations imposed herein. Each Party further represents that this Agreement, when executed by its duly authorized representative, shall become a valid, binding and enforceable legal obligation of that Party. IN WITNESS WHEREOF, the Parties hereto have executed this Renewable Gas Transportation Service Agreement as of the day and year set forth above. Company MidAmerican Energy Company Customer XXX By: By: Name: Name: Title: Title: Date: Date: CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 11 - Attachment A Gas Transportation Customer Requirements 1) Customers requesting Gas Transportation must provide: a. A place to mount the equipment. A minimum 2’ x 4’ area is needed. Either a blank wall or a 2’ x 4’ sheet of treated plywood mounted on two 4” x 4” treated wooden posts would be adequate. Wood posts to be securely mounted to a permanent structure or mounted in concrete footings. i. MidAmerican will determine the location to mount the equipment. b. A dedicated 120 volt, minimum 10 amp, AC power supply with a ground and lockable disconnect. i. The electric line must be installed in conduit with a seal off. 2) Customers requesting Gas Transportation and a pulse for their use must provide: a. A place to mount the equipment. A minimum 2’ x 4’ area is needed. Either a blank wall or a sheet of treated plywood mounted on two 4” x 4” treated wooden posts would be adequate. Wood posts to be securely mounted to a permanent structure or mounted in concrete footings. b. MidAmerican will determine the location to mount the equipment including the AC power disconnect and the customer pulse wire termination. c. A dedicated 120 volt, minimum 10 amp, AC power supply with a ground and lockable disconnect. i. The electric line must be installed in conduit with a seal off. d. A power source on the customer’s signal wire. The customer pulse wire needs to be sourced (or powered) by their pulse counting system. The maximum customer electrical load rating is (the most the signal barrier can take) 40 VDC and 2 amps. ii. The pulse wire must be installed in conduit with a seal off. Conduit and seal off is not needed if wiring is not in a hazardous area. e. MidAmerican will supply a 2 wire Form “A” dry contact near the meter. MidAmerican will terminate the customers pulse wire. Customer’s cable runs over 200 feet may require additional equipment. The customer is responsible for providing and installing any additional equipment. f. MidAmerican pulses to the customer are equal to 100 cubic feet of corrected gas volume. The pulses may be sent in “bursts” not just a steady rate. The customer’s equipment needs to accept 100 CF pulses at irregular intervals. g. Costs are available from Gas Transportation Billing. CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT CONFIDENTIAL DRAFT - 12 - Attachment B Pipeline and Hazardous Materials Safety Administration 1) PHMSA requires that as an operator gains information about internal corrosion, at a minimum, operators must: a. Monitor for, and mitigate the presence of, deleterious gas stream constituents b. At points were gas with potentially deleterious contaminants enters the pipeline, use filter separators or separators and continuous gas quality monitoring equipment. c. At least once per quarter, use gas quality monitoring equipment that includes, but not limited to, a moisture analyzer, chromatograph, carbon dioxide sampling, and hydrogen sulfide sampling. d. Use cleaning pigs and sample accumulated liquids and solids, including tests for microbiologically induced corrosion. e. Use inhibitors when corrosive gas or corrosive liquids are present. f. Address potentially corrosive gas stream constituents as specified in section 192.478(a), where the volumes exceed these amounts over a 24- hour interval in the pipeline as follows: i. Limit carbon dioxide to three percent by volume ii. Allow no free water and otherwise limit water to seven pounds per million cubic feet of gas iii. Limit hydrogen sulfide to 1.0 grain per hundred cubic feet (16 ppm) of gas. If the hydrogen sulfide concentration is greater than 0.5 grain per hundred cubic feet (8 ppm) of gas, implement a pigging and inhibitor injection program to address deleterious gas stream constituents, including follow-up sampling and quality testing of liquids at receipt points. g. Review the program at least semi-annually based on the gas stream experience and implement adjustments to monitor for, and mitigate the presence of, deleterious gas stream constituents. Attachment G MidAmerican Energy NG Pipeline Costs - WWTP 1 Johnson, Michael P. (Sioux Falls) From:Theis, Gregory S <GSTheis@midamerican.com> Sent:Wednesday, April 22, 2020 4:18 PM To:Johnson, Michael P. (Sioux Falls) Subject:IC Waste Water biogas estimate Follow Up Flag:Follow up Due By:Thursday, April 23, 2020 9:00 AM Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Michael, The preliminary minimum system requirements to extend facilities from the IC WW treatment plant to MidAmerican’s system and inject 7 MCFH requires the following: - Install approximately four (4) miles of four (4) inch pipe from 4366 Napoleon St to the outlet of station 54 on Sioux Avenue - Installation odorizer tank, containment, building and foundation Total project costs are estimated to be $2,200,000. We credit three times the estimated annual revenue ($486,365.41 X 3) $1,459,096 resulting in an upfront customer contribution of $897,012. ($740,903.76 plus tax gross up of 156,108.42) Below is the cost breakdown. Based on the estimated volumes the customer can expect an annual bill from MidAmerican Energy of $486,365.61 to inject 7 MCFH into our system. We bill monthly. Greg Theis Program Manager Business and Community Development gstheis@midamerican.com 563-333-8917 Attachment H MidAmerican Energy NG Pipeline Costs - Landfill 1 Johnson, Michael P. (Sioux Falls) From:Theis, Gregory S <GSTheis@midamerican.com> Sent:Wednesday, April 22, 2020 4:17 PM To:Johnson, Michael P. (Sioux Falls) Subject:IC landfill cost estimate Follow Up Flag:Follow up Due By:Thursday, April 23, 2020 9:00 AM Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Michael, The preliminary minimum system requirements to extend facilities from the IC Landfill to MidAmerican’s system and inject 31.25 MCFH requires the following: - Install approximately four (4) miles of four (4) inch pipe from 3900 Hebl Ave to the outlet of the Melrose distribution regulator station - Installation odorizer tank, containment, building and foundation Total project costs are estimated to be $1,800,000. We credit three times the estimated annual revenue ($403,563.48 X 3) $1,210,690.44 resulting in an upfront customer contribution of $713,477.08. ($589,309 plus tax gross up of $124,167.52) Below is the cost breakdown. Based on the estimated volumes the customer can expect an annual bill from MidAmerican Energy of $403,563.48 to inject 7 MCFH into our system. We bill monthly. Greg Theis Program Manager Business and Community Development gstheis@midamerican.com 563-333-8917 Attachment I MidAmerican Energy Electrical Grid Interconnection Request Application Utilities Board Form - Adopted 2/28/17 Page 1 of 4 LEVELS 2-4 INTERCONNECTION REQUEST APPLICATION FORM (For Distributed Generation Facilities 10 MVA or Less) INSTRUCTIONS: 1.*Indicates required information. 2. Mail completed form with application fee (see page 2) to your utility INTERCONNECTION CUSTOMER CONTACT INFORMATION *Owner / Company (Legal Entity Name) *Contact Name *Mailing Address *City *State *Zip *Phone No. (Daytime) Phone No. (Evening) Facsimile No. *Email Address ALTERNATE CONTACT INFORMATION (if different from Customer Contact Information) Owner / Company (Legal Entity Name) Contact Name Mailing Address City State Zip Phone No. (Daytime) Phone No. (Evening) Facsimile No. Email Address FACILITY LOCATION (if different from Customer Contact Information) *Facility Address or Latitude and Longitude *City *State *Zip *Utility Serving Facility Site Account No. of Facility Site (existing utility customers) *Meter No. (existing utility customers) EQUIPMENT CONTRACTOR *Name *Contact Name *Mailing Address *City *State *Zip *Phone No. (Daytime) Phone No. (Evening) Facsimile No. *Email Address ELECTRICAL CONTRACTOR (if different from Equipment Contractor) Name Contact Name Mailing Address City State Zip Phone No. (Daytime) Phone No. (Evening) Facsimile No. *Email Address License No. (if applicable) Active License? (if applicable) YES NO ELECTRIC SERVICE INFORMATION FOR CUSTOMER FACILITY WHERE GENERATOR WILL BE INTERCONNECTED *Capacity (Service Entrance) (Amps) Voltage (Volts) *Type of Service Single Phase Three Phase Delta Secondary Winding Wye If 3 Phase Transformer, indicate type: Primary Winding Wye Transformer Size Impedance *Does this application require a group interconnection study? YES NO *Is this project an expansion of a current distributed generation facility? YES NO Delta Utilities Board Form - Adopted 2/28/17 Page 2 of 4 APPLICANT OWNERSHIP INTEREST (check one) Owner Lease 3rd Party PPA Other (Please explain) *INTENT OF GENERATION (check one) Offset Load (Unit will operate in parallel, but will not export power to utility). Net Metering (Unit will operate in parallel and will export power to utility pursuant to Iowa Utilities Board rule 199 IAC 15.11(5) and the utility's net metering or net billing tariff). Self-Use and Sales to the Utility (Unit will operate in parallel and may export and sell excess power to utility pursuant to Iowa Utilities Board rule 199 IAC 15.5 and the utility's tariff). Wholesale Market Transaction [Unit will operate in parallel and participate in MISO (Midwest Independent System Operators) or other wholesale power markets pursuant to separate requirements and agreements with MISO or other transmission providers, and applicable rules of the Federal Energy Regulatory Commission]. Back-Up Generation (Units that temporarily operate in parallel with the electric distribution system for more than 100 milliseconds). NOTE: Back-up units that do not operate in parallel for more than 100 milliseconds do not need an interconnection agreement. *GENERATOR AND PRIME MOVER INFORMATION Energy Source Hydro Wind Solar Process Byproduct Biomass Oil Natural Gas Coal Other If Solar: Number of Inverters Number of Panels Tilt (degrees) Azimuth (180° is South facing) Array Type: Fixed Single Axis Dual Axis Energy Converter Type Wind Turbine Photovoltaic Cell Fuel Cell Reciprocating Engine Other Generator #1 Size (kW) or (kVA) Generator #1 Nameplate Rating (AC) (kW) Generator #2 Size (kW) or (kVA) Generator #2 Nameplate Rating (AC) (kW) Generator #3 Size (kW) or (kVA) Generator #3 Nameplate Rating (AC) (kW) Total No. of Units Total Capacity of All Generators (kW) or (kVA) *REQUESTED PROCEDURE UNDER WHICH TO EVALUATE INTERCONNECTION REQUEST (check one) Please indicate below which review procedure applies to the interconnection request. The review procedure used is subject to confirmation by the utility. Level 2 - Lab-certified interconnection equipment with an aggregate electric nameplate capacity less than or equal to 2 MVA for non-inverter based systems or inverter-based systems as defined in 199 IAC 45.8(2)(b). Lab-certified is defined in Iowa Utilities Board chapter 45 rules on Electric Interconnection of Distributed Generation Facilities (199 IAC 45.1). (Application fee is $250 plus $1.00 per kVA. If the utility performs a Witness Test as specified in 199 IAC 45.5(10), the utility may charge the interconnected customer an additional cost-based fee of no more than $125.) Level 3 - Distributed generation facility does not export power. Nameplate capacity rating is less than or equal to 50 kVA if connecting to area network or less than or equal to 10 MVA if connecting to a radial distribution feeder. (Application fee amount is $500 plus $2.00 per kVA) Level 4 - Nameplate capacity rating is less than or equal to 10 MVA and the distributed generation facility does not qualify for a Level 1, Level 2, or Level 3 review, or the distributed generation facility has been reviewed but not approved under a Level 1, Level 2, or Level 3 review. (Application fee amount is $1,000 plus $2.00 per kVA, to be applied toward any subsequent studies related to this application.) NOTE: Descriptions for interconnection review categories do not list all criteria that must be satisfied. For a complete list of criteria, please refer to Iowa Utilities Board chapter 45 rules on Electric Interconnection of Distributed Generation Facilities (199 IAC 45). DISTRIBUTED GENERATION FACILITY INFORMATION Commissioning Test Date (If the Commissioning Test Date changes/unknown, the interconnection customer must inform the utility as soon as aware of the changed/known date, but no later than 15 business days.) *List interconnection components/systems to be used in the distributed generation facility that are lab-certified. *Component/System NRTL Providing Label and Listing Copies of manufacturer brochures and/or technical specifications included. YES Utilities Board Form - Adopted 2/28/17 Page 3 of 4 *ENERGY PRODUCTION EQUIPMENT/INVERTER INFORMATION Synchronous Induction Inverter Other Rating (kW) Rating (kVA) *Rated Voltage Volts *Rated Current Amps System Type Tested? (Total System) YES NO (attach product literature) *FOR SYNCHRONOUS MACHINES NOTE: Contact utility to determine if all the information requested in this section is required for the proposed distributed generation facility. Manufacturer Model No. Version No. Submit Copies of the Saturation Curve and the Vee Curve Salient Non-Salient Torque (lb-ft) Rated RPM Field Amperes at rated generator voltage and current and % PF over-excited Type of Exciter Output Power of Exciter Type of Voltage Regulator Locked Rotor Current (Amps) Synchronous Speed (RPM) Winding Connection Minimum Operating Frequency/Time Generator Connection Delta Wye Wye Grounded Direct-axis Synchronous Reactance (Xd) (ohms) Direct-axis Transient Reactance (X'd) (ohms) Direct-axis Sub-transient Reactance (X’d) (ohms) Negative Sequence Reactance (ohms) Zero Sequence Reactance (ohms) Natural Impedance or Grounding Resister (if any) (ohms) *FOR INDUCTION MACHINES NOTE: Contact utility to determine if all the information requested in this section is required for the proposed distributed generation facility. Manufacturer Model No. Version No. Locked Rotor Current (Amps) Rotor Resistance (Rr) (ohms) Exciting Current (Amps) Rotor Resistance (Xr) (ohms) Reactive Power Required Magnetizing Reactance (Xm) (ohms) VARS (No load) Stator Resistance (Rs) (ohms) VARS (Full load) Stator Reactance (Xs) (ohms) Short Circuit Reactance (Xd) (ohms) Phases Single Phase Three Phase Frame Size Design Letter Temp. Rise (°C) REVERSE POWER RELAY INFORMATION (LEVEL 3 REVIEW ONLY) Manufacturer Model No. Relay Type Reverse Power Setting Reverse Power Time Delay (if any) FOR INVERTER-BASED FACILITIES Inverter Information Manufacturer Model No. Type Forced Commutated Line Commutated Rated Output Watts Volts Efficiency %Power Factor % Inverter UL1741 Listed YES NO DC Source/Prime Mover Rating (kW) Rating (kVA) Rated Voltage Volts Open Circuit Voltage (if applicable) Volts Rated Current Amps Short Circuit Current (if applicable) Amps Utilities Board Form - Adopted 2/28/17 Page 4 of 4 *OTHER FACILITY INFORMATION One Line Diagram - A basic drawing of an electric circuit in which one or more conductors are represented by a single line and each electrical device and major component of the installation, from the generator to the point of interconnection, are noted by symbols. One Line Diagram attached YES Plot Plan - A map or sketch showing the distributed generation facility's location in relation to streets, alleys, or other geographic markers (i.e. section pin, corner pin, buildings, permanent structures, etc.). Plot Plan attached YES *CUSTOMER SIGNATURE I hereby certify that all of the information provided in this Interconnection Request Application Form is true. Applicant Signature (signature must reflect Contact Name under section Interconnection Applicant Contact Information) Date Printed Name Title An application fee is required before the application can be processed. Please verify that the appropriate fee is included with the application (see page 2). Amount $ FOR UTILITY ENERGY USE ONLY Date Received Project ID UTILITY ACKNOWLEDGEMENT Receipt of application fee is acknowledged and this interconnection request is complete. Utility Representative’s Signature Date Printed Name Title Submit completed form to : MidAmerican Energy Company Attn: Private Generation P.O. Box 4350 Davenport, IA 52808-9986 PrivateGeneration@midamerican.com Fax: 563-336-3568 Elections if Pursuing Net Metering MidAmerican Energy Company Rate PG Two elections are needed if ‘Net Metering’ is chosen as the interconnection customer’s intent for the private generator consistent with the applicable rate schedule, Rate PG, in MidAmerican’s approved electric tariff. Please refer to the ‘Annual Cash-Out’ section of Rate PG for a description of the annual private energy credit cash-out. Please indicate the interconnection customer’s choices regarding the following two Rate PG elections: INITIAL I-CARE CONTRIBUTION SELECTION Initial I-CARE Contribution Election 50%(default) 75% 100% Elected Billing Cycle for annual cash-out of accumulated private energy credits January April Attachment J Unison Solutions Biogas Conditioning System Proposal - WWTP 1 Johnson, Michael P. (Sioux Falls) From:Adam Klaas <adam.klaas@unisonsolutions.com> Sent:Wednesday, March 4, 2020 7:42 AM To:Johnson, Michael P. (Sioux Falls) Subject:RE: Iowa City WWTP Gas Conditioning System Attachments:Digester gas siloxane results.pdf; John Barker.vcf Follow Up Flag:Follow up Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Mike, See answers in your email below to the questions you asked regarding the Iowa City WWTP. Since the Siloxane levels are so high we would have to remove the Siloxanes at low pressure to allow for larger vessels to get longer media life. This will require that a Blower/Moisture Removal System be installed upstream of the Siloxane Removal System. The H2S Removal Vessel would be placed upstream of the Blower/Moisture Removal System. Here are numbers for that, these will be need for either upgrading option: 1. H2S Removal System: $105,000 a. Estimated Media life at 600ppm and 160scfm: 250days b. Media Cost: $18,500 per change out* c. *does not include labor for change out or spent media disposal fees 2. Blower/Moisture Removal System: $350,000 3. Siloxane Removal System: $165,000 a. Estimated Media life based off attached gas analysis: 23 days b. Media Cost: $35,000 per change out* ($542,000/year) c. *does not include labor for change out or spent media disposal fees 4. Heated Enclosure Adder: $100,000 Two Pass Upgrading System: 1. Two Pass Upgrading System: $950,000 2. Adder for Three Pass Upgrading: $290,000 3. Heated Enclosure Adder: $165,000 BioCNG Vehicle Fuel Upgrading System: 1. BioCNG: $785,000 2. Heated Enclosure Adder: $110,000 I would highly recommend that the WWTP take another gas sample for analysis. The two sample results you sent me were both extremely high but one was over 2x higher than the other. Both of the samples are really old and have no representation of what the gas quality is currently. I have attached contact information for ANGI Energy Systems. They manufacture CNG vehicle fueling systems and will be able to get you pricing on what them. Thanks, Adam Klaas Unison Solutions, Inc. • 5451 Chavenelle Rd. • Dubuque, IA 52002 Office: 563-585-0967 • Fax: 563-585-0970 • Cell: 563-542-3081 www.unisonsolutions.com Leaders in Biogas Technology This email and any attachments therein may contain information that is proprietary in nature. Please do not share or forward this e-mail without the explicit consent of Unison Solutions, Inc. If you are not the proper addressee, please do not review, disclose, copy, distribute or use the contents of this message; please destroy the message immediately and notify me at 563-585-0967. Thank you. Attachment K Unison Solutions Biogas Conditioning System Proposal - Landfill 1 Johnson, Michael P. (Sioux Falls) From:Adam Klaas <adam.klaas@unisonsolutions.com> Sent:Thursday, March 5, 2020 2:00 PM To:Johnson, Michael P. (Sioux Falls) Subject:RE: Iowa City Landfill Gas Conditioning System Follow Up Flag:Follow up Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Mike, Here is some budgetary pricing on the Landfill Upgrading System: Two Pass Upgrading System 1. H2S Removal System: $525,000 a. Estimated Media life at 1,000scfm and 500ppmv: 250days b. Media Cost: $90,000 per change out (both vessels) c. Does not include labor for change out or spent media disposal fees 2. Two Pass Upgrading System: $3,000,000 3. Heated Enclosure Adder: $300,000 Note: Separate systems will be needed to remove the Nitrogen and Oxygen from the upgrading LFG to meet the pipeline specifications. BioCNG Vehicle Fuel Upgrading System: 1. BioCNG 400: $1,200,000 2. Heated Enclosure: $130,000 Note: Depending on the level of Nitrogen and Oxygen in the raw LFG further equipment may be needed to meet SAE J1616. For the BioCNG vehicle fuel systems the model made is the 400scfm unit. Multiple in parallel would be needed to meet maximum gas flows. Thanks, Adam Klaas Unison Solutions, Inc. • 5451 Chavenelle Rd. • Dubuque, IA 52002 Office: 563-585-0967 • Fax: 563-585-0970 • Cell: 563-542-3081 www.unisonsolutions.com Leaders in Biogas Technology Attachment L Guild Associates Pressure Swing Absorption Proposal - Landfill 1 Johnson, Michael P. (Sioux Falls) From:Tyler A. Russell <trussell@guildassociates.com> Sent:Friday, April 3, 2020 10:22 AM To:Johnson, Michael P. (Sioux Falls) Subject:RE: City of Iowa City Biogas Utilization Project Follow Up Flag:Follow up Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Michael, Answers to your questions below: WWTP Digester Gas System: 1. All of Guild’s gas processing equipment is rated for outdoor installation 2. Approximate footprint: 17 ft x 70 ft 3. Annual maintenance for a plant of this scale is estimated to be approximately $25,000; annual plant power consumption for a plant of this scale is estimated to be approximately 1.96 MWh assuming 98% uptime 4. 460V / 3-phase power is required Landfill Gas System: 1. I apologize – I made a mistake on the N2-removal system for your application. In order to meet the O2 product specifications and desired methane recovery, you would need an EQ PSA instead of an N2 PSA a. Revised ROM for CO2 PSA and EQ PSA: $5.8 million i. ROM for EQ PSA only: $3.4 million 2. Approximate footprint (CO2 PSA and EQ PSA): 50 ft x 150 ft 3. Annual maintenance for a plant of this scale (CO2 PSA and EQ PSA) is estimated to be approximately $100,000; annual plant power consumption for a plant of this scale is estimated to be approximately 4.37 MWh assuming 98% uptime 4. 460V / 3-phase power is required Regards, Tyler Russell Process Engineer Guild Associates, Inc. T: (614) 652-6526 M: (614) 735-9992 trussell@guildassociates.com From: Johnson, Michael P. (Sioux Falls) <Michael.P.Johnson@hdrinc.com> Sent: Thursday, April 2, 2020 5:59 PM To: Tyler A. Russell <trussell@guildassociates.com> Subject: RE: City of Iowa City Biogas Utilization Project Hi Tyler, Doing well here, I hope all is well with you also. 2 A few follow-up questions for you on these proposed systems: 1. WWTP Digester Gas System: a. Will a building or other enclosure be required for this system? b. Please provide approximate footprint/dimensions. i. Do you have example drawings of the proposed equipment from similar installations? c. Do you have approximate yearly O&M costs? d. What kind of utility requirements are associated with this equipment (NG, electricity, etc.)? 2. Landfill Gas System: a. What is the approximate/budget price for only the O2 and N2 removal equipment? b. Will a building or other enclosure be required for this system? c. Please provide approximate footprint/dimensions. i. Do you have example drawings of the proposed equipment from similar installations? d. Do you have approximate yearly O&M costs? e. What kind of utility requirements are associated with this equipment (NG, electricity, etc.)? Thanks, Michael P. Johnson, PE D 605.977.7778 M 605.366.1104 hdrinc.com/follow-us From: Tyler A. Russell [mailto:trussell@guildassociates.com] Sent: Wednesday, April 1, 2020 8:50 AM To: Johnson, Michael P. (Sioux Falls) <Michael.P.Johnson@hdrinc.com> Subject: RE: City of Iowa City Biogas Utilization Project CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Michael, I hope you are well and that you and everyone at HDR is staying safe these days. Following up once more on your previous inquiry for CO2 removal of digester and landfill gas, please see the following ROMs for each system below for your budgeting purposes: 1. Iowa City WWTP Digester: $1.19 million a. Includes Feed Compression and Molecular Gate CO2 PSA system 2. Iowa City Landfill: $4 million a. Includes Feed Compression, 2 x Molecular Gate CO2 PSA systems, and a Molecular Gate N2 PSA system Regards, Tyler Russell Process Engineer Guild Associates, Inc. T: (614) 652-6526 M: (614) 735-9992 trussell@guildassociates.com 3 From: Tyler A. Russell Sent: Tuesday, March 24, 2020 9:17 AM To: Michael.P.Johnson@hdrinc.com Subject: RE: City of Iowa City Biogas Utilization Project Michael, I am following up regarding this email. Are you still interested in either one of these units? If so, can you verify the composition of the landfill gas? Regards, Tyler Russell Process Engineer Guild Associates, Inc. T: (614) 652-6526 M: (614) 735-9992 trussell@guildassociates.com From: Tyler A. Russell Sent: Friday, March 13, 2020 2:18 PM To: Michael.P.Johnson@hdrinc.com Subject: RE: City of Iowa City Biogas Utilization Project Hi Michael, Thanks for the call earlier. As discussed: WWTP: 1. At this time we do not have a system capable of running at a feed flow of 80 SCFM; our smallest commercial units are sized for nominally 400 SCFM and can turn down to approximately 30% of design flow (due primarily to feed compressor turn-down capabilities). a. If you would like, we can still provide a quotation for one of these units understanding that the minimum throughput would be your highest expected flow Landfill: 1. We would offer a two-PSA system as a solution for this application. The first system would remove CO2, VOCs, Siloxanes, and H2S; the second system would remove N2 and O2 2. The N2:O2 ratio in the feed gas is a concern; in order to ensure that the oxygen content in the waste stream of the nitrogen-removal unit does not exceed the LOC, the raw feed gas to the system should have a N2:O2 ratio of approximately 10:1 or greater a. Would you mind verifying the raw feed gas composition? Regards, Tyler Russell Process Engineer Guild Associates, Inc. T: (614) 652-6526 M: (614) 735-9992 trussell@guildassociates.com From: Johnson, Michael P. (Sioux Falls) [mailto:Michael.P.Johnson@hdrinc.com] Sent: Friday, February 28, 2020 11:02 AM To: Business Development <bizdev@guildassociates.com> Subject: City of Iowa City Biogas Utilization Project Hello, 4 I am working on a biogas utilization study for the following two sources: 1. WWTP digester biogas: a. 80 scfm current. b. 102 to 160 scfm future. c. Quality: See attached (note the high siloxanes) 2. Landfill biogas: a. 850 scfm current. b. 1,000 scfm future. c. Quality: approximately 50 percent methane, 45 percent carbon dioxide, ~1-2 percent oxygen, ~3-5 percent nitrogen, ~1 other pollutants, and 500ppmv H2S. Please provide planning level costs and drawings for a system to condition biogas at each facility to NG pipeline quality (see attached). Thanks, Michael P. Johnson, PE Water/Wastewater Engineer HDR 6300 S. Old Village Place, Suite 100 Sioux Falls, SD 57108 D 605.977.7778 M 605.366.1104 michael.p.johnson@hdrinc.com hdrinc.com/follow-us Attachment M MTU Engine Generator Proposal – WWTP 1 Johnson, Michael P. (Sioux Falls) From:Clay Hardenburger <clay.hardenburger@istate.com> Sent:Friday, May 1, 2020 9:04 AM To:Johnson, Michael P. (Sioux Falls) Cc:John Hartlieb Subject:RE: 20-00013_1A Iowa City WWTP Cogeneration System Budgetary Pricing Attachments:20-00013_1A Iowa City WWTP TCO (12V400).pdf; MS50255_00E Maintenance Schedule (12V400 BG).pdf Follow Up Flag:Follow up Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Mike, Per your request, please find the attached Total Cost of Ownership (TCO) maintenance estimates for one (1) MTU 12V400GS generator sets at 8000 hours of annual operation. I assumed travel to site from our closest distribution location to be a half hour (45 miles) one way. No inflation estimate was include over the 6 year maintenance cycle. All costs are in 2020 dollar estimates as follows: 8000 hrs $0.0300/kWh average cost over 10 years at full load Please let me know if you have any questions. Regards, Clay Hardenburger | Business Development Manager | Interstate Power Systems 13015 West Custer Avenue | Butler, WI 53007 C: 262.336.3783 O: 262.781.7100 www.istate.com “Pride in Service” From: Clay Hardenburger Sent: Thursday, April 23, 2020 10:32 AM To: Mike Johnson <michael.p.johnson@hdrinc.com> Cc: John Hartlieb <john.hartlieb@istate.com> Subject: 20-00013_1A Iowa City WWTP Cogeneration System Budgetary Pricing Mike, Per your request, please see the budgetary Iowa City WWTP cogeneration system pricing below based on one (1) MTU 12V400GS biogas generator set to be installed within a building(s) design to accommodate this equipment: 1. Cogeneration System - $567,100 a. (1) Generator Set System i. MTU 12V400GS biogas generator set 2 ii. Continuously rated at 349 ekW iii. Voltage – 480 V iv. (2) External oil tanks – 215 gal v. (1) Remote HT cooling system pumps and controls with motor starter control panel vi. (3) Remote HT rotary 3-way electric thermostatic control valves vii. (1) Remote gas train – 3 inch viii. (1) Engine mounted MIP generator set control panel with synchronizer ix. (1) Floor mounted MMC remote control panel with 15 inch HMI x. (1) Floor mounted Generator Circuit Breaker (GCB) – 800 A, 480 V, 60 hz, 3 ph xi. 1 year standard manufacturer’s warranty b. (1) Remote Cooling System i. Site elevation – 700 ft ii. Site maximum temperature – 104 F iii. (1) Remote HT Radiator with (2) VFD controlled fans 1. Electric power – 480 VAC, 3 ph, 60 hz 2. Control panel with Modbus TCP/IP communications iv. (1) HT process heat exchanger v. (1) Remote 50 gal expansion tank vi. Mechanical butterfly and ball valves vii. Temperature and pressure sensors c. (1) Remote Exhaust Hot Water Heat Recovery System i. (1) HT exhaust hot water heat recovery heat exchanger ii. Exhaust Flange connections – 10 inch d. (1) On-Site Start-Up and Commissioning i. All equipment shipped loose to site with installation by others ii. All shipping included to site with unloading by others iii. All fluids first fill iv. Interstate Power Systems start-up v. MTU factory commissioning vi. EPA stack emissions testing vii. 1 year standard manufacturer’s warranty 2. Biogas Conditioning System – $676,300 a. (2) Redundant hydrogen sulfide 100% capacity vessels i. 6 month media replacement life per vessel ii. 2,000 lbs of replacement media at $4,400 per vessel b. (1) Glycol chiller system i. Rotary lobe blower – 160 cfm, 20 hp motor with VFD ii. Remote glycol chiller – 7 ton capacity, 7 kW electric power consumption c. (2) Redundant siloxane 100% capacity media vessels i. 4 month media replacement life per vessel ii. 2,750 lbs of replacement media at $8,800 per vessel d. (1) Control system i. Floor mounted control panel ii. Custom PLC system iii. 15 inch HMI touchscreen iv. Realtime biogas analyzer – methane, carbon dioxide, and oxygen e. (1) On-Site Start-Up and Commissioning i. All equipment shipped loose to site with installation by others ii. 1 year standard manufacturer’s warranty iii. All shipping included to site with unloading by others iv. Factory start-up and commissioning 3. Optional Regenerative Biogas Conditioning System – $1,000,100 3 a. (2) Redundant hydrogen sulfide 100% capacity vessels i. 6 month media replacement per vessel ii. 2,000 lbs of replacement media at $4,400 per vessel b. (1) Glycol chiller system i. Rotary lobe blower – 160 cfm, 20 hp motor with VFD ii. Remote glycol chiller – 7 ton capacity, 7 kW electric power consumption c. (1) Temperature Swing Adsorber (TSA) regenerative siloxane removal system i. 10 year polymer media replacement life ii. 10 year replace media cost – $108,200 iii. Electric power consumption – 20 kW iv. Regenerative purge air with siloxane compounds to be vented to atmosphere d. (1) Control system i. Floor mounted control panel ii. Custom PLC system iii. 15 inch HMI touchscreen iv. Realtime biogas analyzer – methane, carbon dioxide, and oxygen e. (1) On-Site Start-Up and Commissioning i. All equipment shipped loose to site with installation by others ii. 1 year standard manufacturer’s warranty iii. All shipping included to site with unloading by others iv. Factory start-up and commissioning The media based siloxane removal system would be more cost effective over the regenerative system in the long-term due to the low biogas flow rate in this system. Please let me know if you have any questions. Regards, Clay Hardenburger | Business Development Manager | Interstate Power Systems 13015 West Custer Avenue | Butler, WI 53007 C: 262.336.3783 O: 262.781.7100 www.istate.com “Pride in Service” EPG System Data Sheet Iowa City WWTP Proposal:20-00013_2A 12V400_GS Rating:349 ekW - Continuous None Fuel Type:Biogas 50/50 Ethylene Glycol Process Fluid:None 104⁰ F Site Elevation:700 ft Load Level (%)100 75 50 NOx (g-bhp-hr)1.00 1.00 1.00 CO (g-bhp-hr)2.00 2.00 2.00 Energy Input (LHV)(btu/min)54,133 42,400 31,200 Flowrate @ 600 btu/ft³(cfm)90 71 52 Jacket Water (btu/min)0 0 0 Exhaust (btu/min)0 0 0 Aftercooler/Oil Cooler (btu/min)0 0 0 Net Recovery (btu/min)0 0 0 Energy Recovered (btu/min)0 0 0 Inlet Temperature (⁰F)0 0 0 Outlet Temperature (⁰F)0 0 0 Flow Rate (gpm)0 0 0 Energy Recovered (btu/min)0 0 0 Inlet Temperature (⁰F)0 0 0 Outlet Temperature (⁰F)0 0 0 Flow Rate (gpm)0 0 0 Generator (cosɸ 1)(ekW)349.0 262.0 175.0 HT Pump (ekW)4.0 4.0 4.0 LT Pump (ekW)0.0 0.0 0.0 Remote Radiator (ekW)2.1 1.6 1.1 Net Output (ekW)345.0 258.0 171.0 Electrical Efficiency (%)36.3%34.6%31.2% Thermal Efficiency (%)0.0%0.0%0.0% System Efficiency (%)36.3%34.6%31.2% CHP System Type: Engine Coolant: Site Temperature: Catalyst System Project Name: Generator Set: System Efficiency Fuel System Cogeneration Recovery System Performance HT Hot Water Recovery System LT Hot Water Recovery System Electrical System System Specifications For Quote Iowa City WWTP Not For Construction Project Name: Quote No. Sheet: Dwg No.: 20-00013_2A of Rev Date By 2A 05/04/2020 CCH HT Circuit 1 1EMTU 12V400GS Generator Set 190° F 13,600 btu/min 180° F 163 gpm 20 gal 349 ekW 480 VAC 4.0 ekW 480 VAC 104° F 28,631 btu/min Purified Biogas 3 psig54,133 btu/min 972° F 4,702 lbs/hr 1.00 g/bhp-hr NOx 2.00 g/bhp-hr CO 0.70 g/bhp-hr VOC AC OC Page 1 of 2 Iowa City WWTP 20-00013_1A Tax is excluded. Labour times are based on experienced and trained pers. Filter intervals based on standard contamination ratio. No maintenance at the last operating hour calculated. Engine details Engine model 12V400GS_B3042Z7_3A_2017-11 Power 349 kW TBO 48,000 h or 6 years Calculation details Basic calculation currency:€Currency exchange rate:1.00001 € = USD Calculation start hours >0 h Calculation end hours >48,000 h Total operating hours >48,000 h Calculation start year >0Calculation end year>6.0Total calculation years > 6 years Operating hours per Year >8,000 h Fleet (number of engines)1 No. of engine overhauls included >0 Prev Maintenance QL1 Labour rate >162.75€ Component Maintenance Labour rate >162.75€ Extended Component Maintenance Labour rate >162.75€ Corrective Maintenance Labour rate >193.75€ Escalation factor labour 0.00% Escalation factor material 0.00% Escal. factor Transp., travel, accom., Proj. support 0.00% Escalation factor oil and coolant 0.00%Number of supervisor on site:0Spare engines:No Swing engines No Swing units:No Tool sets:No Spare part stock No QL1 parts:Yes QL1 labour (Skill Intermediate)Yes Summary of cost per engine Total cost of ownership (TCO)Cost per operating hour and engine QL1 Transp. cost & Comp./Parts:Yes QL1Accom.,travel,pass.,transp.PM:No Price Basis:2020 Currency:USD Oil change interval 1600 hours (limit: 2 years)Preventive Maintenance QL1 305,774.64 USD Preventive Maintenance 6.37 USD Coolant change interval 9000 hours (limit: 2 years)Component Maintenance 0.00 USD QL3 Parts:No Ext. Compon. Maintenance 0.00 USD Total per engine 501,975 USD QL3 Labour (Skill Intermediate)No Corrective Maintenance 29,930.06 USD Corrective Maintenance 0.62 USD QL3 Transp. cost & Comp./Parts:No Total labour cost 155,822.51 USD QL3 Accom.,travel,pass.,transp.PM:No Total material cost 159,062.59 USD QL4 Parts:No Transp., travel and accommodation 20,819.60 USD Project support 0.00 USD QL4 Labour: (Skill Intermediate)No Coolant change cost*16,630.00 USD Fleet total (1 engine/s)501,975 USD QL4 Transp. cost & Comp./Parts:No Oil change cost*149,640.00 USD QL4 Accom.,travel,pass.,transp.PM:No Project support cost 0.00 USD Total per engine 6.99 USDParts CM:Yes Without fluids and lubricants Labour CM:Yes Sum QL1 labour hours 862.0 h Transport-, accomo. cost & allowance CM: No Sum QL2 labour hours 80.2 hCustomer deductible CM: No Sum QL3 labour hours 0.0 hReman price for engine considered:No Sum QL4 labour hours 0.0 h Reman Price for entire scope of supply considered:No Facilities for spare storage and tool keeping to be supplied by depots:NoPrice basis :2020Price escalation calculated:No Estimation of Life Cycle Cost -TCO (Total Cost of Ownership) 0 1 2 3 4 5 6 7 Total cost of ownership per engine -Overview by year Series6 Series5 Series4 Series3 Series2 Series1 (C) by MTU Friedrichshafen GmbH This data is for the exclusive and confidential use of the addressee during this project. Any other distribution, use or reproduction without MTU's prior consent is unauthorised and strictly prohibited. Printed: 4/30/2020 Page 2 of 2 Iowa City WWTP 20-00013_1A Estimation of Life Cycle Cost -TCO (Total Cost of Ownership) Year Range of operating hours Preventive Maintenance QL1 Component Maintenance QL3 Extended Component Maintenance QL 4 Corrective Maintenance Total labour cost Total material cost Transp., travel and accommodation Coolant change cost* Oil change cost* Project Support and PM Support Cost Total cost per year & engine Yearly cost per operating hour Preventive Maintenance QL1 Component Maintenance QL3 Extended Component Maintenance QL4 Corrective Maintenance Service hours per year without supervisor Year Year 1 0 h -8,000 h 28,176.43 - - -16,881.33 8,157.90 3,137.20 -20,640.00 -48,816.43 6.10 103.7 h - - -103.7 h Year 1 Year 2 8,000 h -16,000 h 41,590.14 - -5,986.01 24,753.35 19,115.20 3,707.60 3,326.00 25,800.00 -76,702.15 9.59 133.0 h - -16.0 h 149.0 h Year 2 Year 3 16,000 h -24,000 h 40,576.77 - -5,986.01 24,472.69 18,667.70 3,422.40 3,326.00 25,800.00 -75,688.79 9.46 131.3 h - -16.0 h 147.3 h Year 3 Year 4 24,000 h -32,000 h 114,699.20 - -5,986.01 41,143.17 75,834.44 3,707.60 3,326.00 25,800.00 -149,811.21 18.73 233.7 h - -16.0 h 249.7 h Year 4 Year 5 32,000 h -40,000 h 40,694.24 - -5,986.01 24,427.85 19,115.20 3,137.20 3,326.00 25,800.00 -75,806.25 9.48 131.0 h - -16.0 h 147.0 h Year 5 Year 6 40,000 h -48,000 h 40,037.87 - -5,986.01 24,144.13 18,172.15 3,707.60 3,326.00 25,800.00 -75,149.88 9.39 129.3 h - -16.0 h 145.3 h Year 6 Year 7 --- - - - - - - - - - - - - - - - - -Year 7 Year 8 --- - - - - - - - - - - - - - - - - -Year 8 Year 9 --- - - - - - - - - - - - - - - - - -Year 9 Year 10 --- - - - - - - - - - - - - - - - - -Year 10 Year 11 --- - - - - - - - - - - - - - - - - -Year 11 Year 12 --- - - - - - - - - - - - - - - - - -Year 12 Year 13 --- - - - - - - - - - - - - - - - - -Year 13 Year 14 --- - - - - - - - - - - - - - - - - -Year 14 Year 15 --- - - - - - - - - - - - - - - - - -Year 15 Year 16 --- - - - - - - - - - - - - - - - - -Year 16 Year 17 --- - - - - - - - - - - - - - - - - -Year 17 Year 18 --- - - - - - - - - - - - - - - - - -Year 18 Year 19 --- - - - - - - - - - - - - - - - - -Year 19 Year 20 --- - - - - - - - - - - - - - - - - -Year 20 Year 21 --- - - - - - - - - - - - - - - - - -Year 21 Year 22 --- - - - - - - - - - - - - - - - - -Year 22 Year 23 --- - - - - - - - - - - - - - - - - -Year 23 Year 24 --- - - - - - - - - - - - - - - - - -Year 24 Year 25 --- - - - - - - - - - - - - - - - - -Year 25 Year 26 --- - - - - - - - - - - - - - - - - -Year 26 Year 27 --- - - - - - - - - - - - - - - - - -Year 27 Year 28 --- - - - - - - - - - - - - - - - - -Year 28 Year 29 --- - - - - - - - - - - - - - - - - -Year 29 Year 30 --- - - - - - - - - - - - - - - - - -Year 30 Total per engine 305,774.64 - -29,930.06 155,822.51 159,062.59 20,819.60 16,630.00 149,640.00 -501,974.70 10.46 862.0 h - -80.2 h 942.2 h Total per engine Legal notice Rolls-Royce Power systems will not be liable in any circumstances, as far as admissible by law, for the completness and or correctness of either the data used or the calculations performed The information contained within this document is based on the current design and standard engine load and environmental conditions as stated in the respective Maintenance Schedule.The LCC Data is an estimation based on the available reference data at this time, LCC Data will be updated in accordance with design development and the availability of empirical field data. The RAM / LCC Data may be influenced by means beyond Rolls Royce Power Systems' / MTU Friedrichshafen's control, such as e.g. operator misuse or induced failures. All information are not binding estimations. Any guarantees can only be given in a maintenance and repair contract, which has to contain additional contractual agreements on conditions and consequences in the case of non-compliance. German civil Under no circumstances any calculated values shall be interpreted as warranted or guaranteed values according to the §§ 443, 444 BGB (German Civil Code), even if a purchase, maintenance or other contract is made between the parties Commercial The information contained within this document belongs to MTU Friedrichshafen and shall be kept in confidence by the recipient. It is issued solely for use in connection with this contract and shall not be used for any other purpose. The contents of this document shall not be divulged to any Third Party without the prior written consent of MTU Friedrichshafen. The copyright in this document belongs to MTU Friedrichshafen and this document is not to be copied or reproduced by the recipient without the prior written consent of MTU Friedrichshafen. Anti trust Calculated LCC templates and resulting EXPORT sheets are not allowed to provide to any Rolls-Royce Power Systems employee because of cartel / anti trust law reasons. Exception: Hubs/Subsidiaries. Please be aware that each user is responsible by himself to observe his regional laws and anti trust regulations. The exchange of strategic information of our competitors has to be judged under antitrust aspects critically and may have restrictive effects on competition. Solely the information about competitors shall be provided being legally obtained.Therefore the strategic information about competitors shall be publically available or the information is considered historically (C) by MTU Friedrichshafen GmbH This data is for the exclusive and confidential use of the addressee during this project. Any other distribution, use or reproduction without MTU's prior consent is unauthorised and strictly prohibited. Printed: 4/30/2020 Attachment N MTU Engine Generator Proposal – Landfill 1 Johnson, Michael P. (Sioux Falls) From:Clay Hardenburger <clay.hardenburger@istate.com> Sent:Friday, May 1, 2020 9:12 AM To:Johnson, Michael P. (Sioux Falls) Cc:John Hartlieb Subject:RE: 20-00013_1B Iowa City Landfill EPG System Budgetary Pricing Attachments:20-00013_1B Iowa City Landfill TCO (12V4000L32FB).pdf; MS50200_01E Maintenance Schedule (4000L32FB).pdf Follow Up Flag:Follow up Flag Status:Flagged CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Mike, Per your request, please find the attached Total Cost of Ownership (TCO) maintenance estimates for three (3) MTU 12V4000L32FB generator sets at 8000 hours of annual operation. I assumed travel to site from our closest distribution location to be a half hour (45 miles) one way. No inflation estimate was include over the 10 year maintenance cycle. All cost are in 2020 dollar estimates as follows: 8000 hrs $0.0202/kWh average cost over 8 years at full load Please let me know if you have any questions. Regards, Clay Hardenburger | Business Development Manager | Interstate Power Systems 13015 West Custer Avenue | Butler, WI 53007 C: 262.336.3783 O: 262.781.7100 www.istate.com “Pride in Service” From: Clay Hardenburger Sent: Friday, April 24, 2020 10:11 AM To: Mike Johnson <michael.p.johnson@hdrinc.com> Cc: John Hartlieb <john.hartlieb@istate.com> Subject: 20-00013_1B Iowa City Landfill EPG System Budgetary Pricing Mike, Per your request, please see the budgetary Iowa City Landfill Electric Power Generation (EPG) system pricing below based on three (3) MTU 12V4000L32FB biogas generator set to be installed within a building(s) design to accommodate this equipment: 1. Electric Power Generation System - $2,265,600 2 a. (3) Generator Set Systems i. MTU 12V4000L32FB biogas generator set ii. Continuously rated at 1155 ekW iii. Voltage – 4160 V iv. (2) External oil tanks – 275 gal v. (1) Remote HT cooling system pump and controls with motor starter control panel vi. (1) Remote HT rotary 3-way electric thermostatic control valves vii. (1) Remote LT cooling system pump and controls with motor starter control panel viii. (1) Remote LT rotary 3-way electric thermostatic control valves ix. (1) Remote gas train – 5 inch x. (1) Engine mounted MIP generator set control panel with synchronizer xi. (1) Floor mounted MMC remote control panel with 15 inch HMI xii. 1 year standard manufacturer’s warranty b. (3) Remote Cooling Systems i. Site elevation – 700 ft ii. Site maximum temperature – 104 F iii. (1) Remote HT Radiator with (4) VFD controlled fans 1. Electric power – 480 VAC, 3 ph, 60 hz 2. Control panel with Modbus TCP/IP communications iv. (1) Remote HT 30 gal expansion tank v. (1) Remote LT 10 gal expansion tank vi. Mechanical butterfly and ball valves vii. Temperature and pressure sensors c. (3) Remote Exhaust Systems i. (1) Hospital grade stainless steel silencer ii. (1) Stainless steel wall thimble iii. Exhaust Flange connections – 12 inch iv. Exhaust flex connectors d. (1) On-Site Start-Up and Commissioning i. All equipment shipped loose to site with installation by others ii. All shipping included to site with unloading by others iii. All fluids first fill iv. Interstate Power Systems start-up v. MTU factory commissioning vi. EPA stack emissions testing vii. 1 year standard manufacturer’s warranty 2. Paralleling Switchgear System - $454,300 a. (1) Power Envelop i. 5 kV metal clad power envelop ii. 1200A insulated bus bar iii. 1200A, circuit breakers iv. Schweitzer protective relays v. (3) Neutral grounding resistor systems vi. 125 Vdc station battery system vii. 1 year standard manufacturer’s warranty b. (1) Master Control System i. Floor mounted control panel ii. Custom PLC system iii. Utility tie circuit breaker synchronizer iv. 15 inch HMI touchscreen v. Automatic, semi-automatic, and manual system controls vi. 1 year standard manufacturer’s warranty 3 c. (1) On-Site Start-Up and Commissioning i. All shipping included to site with unloading by others ii. Switchgear factory start-up and commissioning iii. Protective relay coordination study, programming, and testing 3. Biogas Conditioning System – $1,372,700 a. (2) Redundant hydrogen sulfide 100% capacity vessels i. 3 month media replacement life per vessel ii. 28,000 lbs of replacement media at $61,700 per vessel b. (1) Glycol chiller system i. Multi-Stage centrifugal blower – 1100 cfm, 55 hp motor with VFD ii. Remote glycol chiller – 60 ton capacity, 60 kW electric power consumption c. (2) Redundant siloxane 100% capacity media vessels i. 4 month media replacement life per vessel ii. 16,500 lbs of replacement media at $52,600 per vessel d. (1) Control system i. Floor mounted control panel ii. Custom PLC system iii. 15 inch HMI touchscreen iv. Realtime biogas analyzer – methane, carbon dioxide, and oxygen e. (1) On-Site Start-Up and Commissioning i. All equipment shipped loose to site with installation by others ii. 1 year standard manufacturer’s warranty iii. All shipping included to site with unloading by others iv. Factory start-up and commissioning 4. Optional Regenerative Biogas Conditioning System – $1,540,000 a. (2) Redundant hydrogen sulfide 100% capacity vessels i. 3 month media replacement life per vessel ii. 28,000 lbs of replacement media at $61,700 per vessel b. (1) Glycol chiller system i. Multi-Stage centrifugal blower – 1100 cfm, 55 hp motor with VFD ii. Remote glycol chiller – 60 ton capacity, 60 kW electric power consumption c. (1) Temperature Swing Adsorber (TSA) regenerative siloxane removal system i. 10 year polymer media replacement life ii. 10 year replace media cost – $108,200 iii. Electric power consumption – 60 kW iv. Regenerative purge air with siloxane compounds to be vented to atmosphere d. (1) Control system i. Floor mounted control panel ii. Custom PLC system iii. 15 inch HMI touchscreen iv. Realtime biogas analyzer – methane, carbon dioxide, and oxygen e. (1) On-Site Start-Up and Commissioning i. All equipment shipped loose to site with installation by others ii. 1 year standard manufacturer’s warranty iii. All shipping included to site with unloading by others iv. Factory start-up and commissioning 5. Enclosure System Adders a. Generator Set Enclosure System – $221,400 per generator set i. Sound Level 2 Attenuation – 75 dBA at 23 ft ii. Ventilation system with VFD controls – 15,000 cfm iii. Dimensions – 144 in W x 524 in L x 150 in H x 50,000 lbs b. Switchgear E-House System – $343,400 4 i. Insulated with environmental controls ii. Dimensions – 44 ft L x 14 ft W x 12 ft H The regenerative siloxane removal system would be more cost effective over the media based system in the long-term due to the high biogas flow rate in this system. Please let me know if you have any questions. Regards, Clay Hardenburger | Business Development Manager | Interstate Power Systems 13015 West Custer Avenue | Butler, WI 53007 C: 262.336.3783 O: 262.781.7100 www.istate.com “Pride in Service” EPG System Data Sheet Iowa City LFGTE Proposal:20-00013_1B 12V4000L32FB Rating:1155 ekW - Continuous None Fuel Type:Biogas 50/50 Ethylene Glycol Process Fluid:None 104⁰ F Site Elevation:700 ft Load Level (%)100 75 50 NOx (g-bhp-hr)1.00 1.00 1.00 CO (g-bhp-hr)2.00 2.00 2.00 Energy Input (LHV)(btu/min)158,633 122,200 86,967 Flowrate @ 450 btu/ft³(cfm)353 272 193 Jacket Water (btu/min)0 0 0 Exhaust (btu/min)0 0 0 Aftercooler/Oil Cooler (btu/min)0 0 0 Net Recovery (btu/min)0 0 0 Energy Recovered (btu/min)0 0 0 Inlet Temperature (⁰F)0 0 0 Outlet Temperature (⁰F)0 0 0 Flow Rate (gpm)0 0 0 Energy Recovered (btu/min)0 0 0 Inlet Temperature (⁰F)0 0 0 Outlet Temperature (⁰F)0 0 0 Flow Rate (gpm)0 0 0 Generator (cosɸ 1)(ekW)1155.0 866.0 578.0 HT Pump (ekW)8.1 8.1 8.1 LT Pump (ekW)4.1 4.1 4.1 Remote Radiator (ekW)8.4 6.3 4.2 Net Output (ekW)1142.8 853.8 565.8 Electrical Efficiency (%)41.0%39.8%37.0% Thermal Efficiency (%)0.0%0.0%0.0% System Efficiency (%)41.0%39.8%37.0% CHP System Type: Engine Coolant: Site Temperature: Catalyst System Project Name: Generator Set: System Efficiency Fuel System Cogeneration Recovery System Performance HT Hot Water Recovery System LT Hot Water Recovery System Electrical System System Specifications For Quote Iowa City Landfill Not For Construction Project Name: Quote No. Sheet: Dwg No.: 20-00013_1B of Rev Date By 1B 04/23/2020 CCH HT Circuit 1 2 MTU 12V4000L32FB Generator Set 194° F 36,200 btu/min 172° F 215 gpm 30 gal 1,155 ekW 4,160 VAC 8.1 ekW 480 VAC 104° F 36,200 btu/min 8.4 ekW 480 VAC 831° F 13,960 lbs/hr 1.00 g/bhp-hr NOx 2.0 g/bhp-hr CO 0.70 g/bhp-hr NMHC Purified Biogas 3 psig158,633 btu/min AC1 OC E System Specifications For Quote Iowa City Landfill Not For Construction Project Name: Quote No. Sheet: Dwg No.: 20-00014_1B of Rev Date By 1B 04/23/2020 CCH LT Circuit 2 2KOHLERPOWER.COM MTU 12V4000L32FB Generator SetAC2 E127° F 146 gpm 132° F 5,233 btu/min 10 gal 1,155 ekW 4,160 VAC 4.1 ekW 480 VAC 104° F 5,233 btu/min 8.4 ekW 480 VAC Page 1 of 2 Iowa City Landfill 20-00013_1B Tax is excluded. Labour times are based on experienced and trained pers. Filter intervals based on standard contamination ratio. No maintenance at the last operating hour calculated. Engine details Engine model GS_12V4000L32FB_3A_Gearbox60Hz_TBO64000 Power 3,465 kW TBO 64,000 h or 8 years Calculation details Basic calculation currency:€Currency exchange rate:1.00001 € = USD Calculation start hours >0 h Calculation end hours >64,000 h Total operating hours >64,000 h Calculation start year >0Calculation end year>8.0Total calculation years > 8 years Operating hours per Year >8,000 h Fleet (number of engines)3 No. of engine overhauls included >0 Prev Maintenance QL1 Labour rate >162.75€ Component Maintenance Labour rate >162.75€ Extended Component Maintenance Labour rate >162.75€ Corrective Maintenance Labour rate >193.75€ Escalation factor labour 0.00% Escalation factor material 0.00% Escal. factor Transp., travel, accom., Proj. support 0.00% Escalation factor oil and coolant 0.00%Number of supervisor on site:0Spare engines:No Swing engines No Swing units:No Tool sets:No Spare part stock No QL1 parts:Yes QL1 labour (Skill Intermediate)Yes Summary of cost per engine Total cost of ownership (TCO)Cost per operating hour and engine QL1 Transp. cost & Comp./Parts:Yes QL1Accom.,travel,pass.,transp.PM:No Price Basis:2020 Currency:USD Oil change interval 3000 hours (limit: 2 years)Preventive Maintenance QL1 721,930.81 USD Preventive Maintenance 16.93 USD Coolant change interval 9000 hours (limit: 2 years)Component Maintenance 361,645.80 USD QL3 Parts:Yes Ext. Compon. Maintenance 0.00 USD Total per engine 1,492,781 USD QL3 Labour (Skill Intermediate)Yes Corrective Maintenance 57,793.97 USD Corrective Maintenance 0.90 USD QL3 Transp. cost & Comp./Parts:Yes Total labour cost 371,734.09 USD QL3 Accom.,travel,pass.,transp.PM:No Total material cost 733,416.09 USD QL4 Parts:No Transp., travel and accommodation 36,220.40 USD Project support 0.00 USD QL4 Labour: (Skill Intermediate)No Coolant change cost*22,718.50 USD Fleet total (3 engine/s)4,478,343 USD QL4 Transp. cost & Comp./Parts:No Oil change cost*328,692.00 USD QL4 Accom.,travel,pass.,transp.PM:No Project support cost 0.00 USD Total per engine 17.83 USDParts CM:Yes Without fluids and lubricants Labour CM:Yes Sum QL1 labour hours 1234.3 h Transport-, accomo. cost & allowance CM: No Sum QL2 labour hours 116.2 hCustomer deductible CM: No Sum QL3 labour hours 911.5 hReman price for engine considered:No Sum QL4 labour hours 0.0 h Reman Price for entire scope of supply considered:No Facilities for spare storage and tool keeping to be supplied by depots:NoPrice basis :2020Price escalation calculated:No Estimation of Life Cycle Cost -TCO (Total Cost of Ownership) 0 1 2 3 4 5 6 7 Total cost of ownership per engine -Overview by year Series6 Series5 Series4 Series3 Series2 Series1 (C) by MTU Friedrichshafen GmbH This data is for the exclusive and confidential use of the addressee during this project. Any other distribution, use or reproduction without MTU's prior consent is unauthorised and strictly prohibited. Printed: 5/1/2020 Page 2 of 2 Iowa City Landfill 20-00013_1B Estimation of Life Cycle Cost -TCO (Total Cost of Ownership) Year Range of operating hours Preventive Maintenance QL1 Component Maintenance QL3 Extended Component Maintenance QL 4 Corrective Maintenance Total labour cost Total material cost Transp., travel and accommodation Coolant change cost* Oil change cost* Project Support and PM Support Cost Total cost per year & engine Yearly cost per operating hour Preventive Maintenance QL1 Component Maintenance QL3 Extended Component Maintenance QL4 Corrective Maintenance Service hours per year without supervisor Year Year 1 0 h -8,000 h 71,190.77 - - -19,970.04 46,942.73 4,278.00 -31,304.00 -102,494.77 12.81 122.7 h - - -122.7 h Year 1 Year 2 8,000 h -16,000 h 105,500.00 - -8,256.28 31,582.43 77,610.65 4,563.20 3,245.50 46,956.00 -163,957.78 20.49 174.3 h - -16.6 h 190.9 h Year 2 Year 3 16,000 h -24,000 h 72,516.62 97,440.92 -8,256.28 69,501.51 104,149.10 4,563.20 3,245.50 31,304.00 -212,763.31 26.60 128.7 h 278.6 h -16.6 h 423.9 h Year 3 Year 4 24,000 h -32,000 h 116,690.21 - -8,256.28 36,200.66 84,182.63 4,563.20 3,245.50 46,956.00 -175,147.99 21.89 202.7 h - -16.6 h 219.3 h Year 4 Year 5 32,000 h -40,000 h 94,595.01 130,831.82 -8,256.28 76,094.35 153,025.56 4,563.20 3,245.50 46,956.00 -283,884.61 35.49 154.3 h 293.5 h -16.6 h 464.4 h Year 5 Year 6 40,000 h -48,000 h 83,421.60 - -8,256.28 27,406.79 59,707.89 4,563.20 3,245.50 31,304.00 -126,227.38 15.78 148.6 h - -16.6 h 165.2 h Year 6 Year 7 48,000 h -56,000 h 72,104.16 133,373.07 -8,256.28 79,336.94 129,833.37 4,563.20 3,245.50 46,956.00 -263,935.01 32.99 128.3 h 339.4 h -16.6 h 484.3 h Year 7 Year 8 56,000 h -64,000 h 105,912.45 - -8,256.28 31,641.38 77,964.15 4,563.20 3,245.50 46,956.00 -164,370.23 20.55 174.7 h - -16.6 h 191.3 h Year 8 Year 9 --- - - - - - - - - - - - - - - - - -Year 9 Year 10 --- - - - - - - - - - - - - - - - - -Year 10 Year 11 --- - - - - - - - - - - - - - - - - -Year 11 Year 12 --- - - - - - - - - - - - - - - - - -Year 12 Year 13 --- - - - - - - - - - - - - - - - - -Year 13 Year 14 --- - - - - - - - - - - - - - - - - -Year 14 Year 15 --- - - - - - - - - - - - - - - - - -Year 15 Year 16 --- - - - - - - - - - - - - - - - - -Year 16 Year 17 --- - - - - - - - - - - - - - - - - -Year 17 Year 18 --- - - - - - - - - - - - - - - - - -Year 18 Year 19 --- - - - - - - - - - - - - - - - - -Year 19 Year 20 --- - - - - - - - - - - - - - - - - -Year 20 Year 21 --- - - - - - - - - - - - - - - - - -Year 21 Year 22 --- - - - - - - - - - - - - - - - - -Year 22 Year 23 --- - - - - - - - - - - - - - - - - -Year 23 Year 24 --- - - - - - - - - - - - - - - - - -Year 24 Year 25 --- - - - - - - - - - - - - - - - - -Year 25 Year 26 --- - - - - - - - - - - - - - - - - -Year 26 Year 27 --- - - - - - - - - - - - - - - - - -Year 27 Year 28 --- - - - - - - - - - - - - - - - - -Year 28 Year 29 --- - - - - - - - - - - - - - - - - -Year 29 Year 30 --- - - - - - - - - - - - - - - - - -Year 30 Total per engine 721,930.81 361,645.80 -57,793.97 371,734.09 733,416.09 36,220.40 22,718.50 328,692.00 -1,492,781.08 23.32 1234.3 h 911.5 h -116.2 h 2261.9 h Total per engine Legal notice Rolls-Royce Power systems will not be liable in any circumstances, as far as admissible by law, for the completness and or correctness of either the data used or the calculations performed The information contained within this document is based on the current design and standard engine load and environmental conditions as stated in the respective Maintenance Schedule.The LCC Data is an estimation based on the available reference data at this time, LCC Data will be updated in accordance with design development and the availability of empirical field data. The RAM / LCC Data may be influenced by means beyond Rolls Royce Power Systems' / MTU Friedrichshafen's control, such as e.g. operator misuse or induced failures. All information are not binding estimations. Any guarantees can only be given in a maintenance and repair contract, which has to contain additional contractual agreements on conditions and consequences in the case of non-compliance. German civil Under no circumstances any calculated values shall be interpreted as warranted or guaranteed values according to the §§ 443, 444 BGB (German Civil Code), even if a purchase, maintenance or other contract is made between the parties Commercial The information contained within this document belongs to MTU Friedrichshafen and shall be kept in confidence by the recipient. It is issued solely for use in connection with this contract and shall not be used for any other purpose. The contents of this document shall not be divulged to any Third Party without the prior written consent of MTU Friedrichshafen. The copyright in this document belongs to MTU Friedrichshafen and this document is not to be copied or reproduced by the recipient without the prior written consent of MTU Friedrichshafen. Anti trust Calculated LCC templates and resulting EXPORT sheets are not allowed to provide to any Rolls-Royce Power Systems employee because of cartel / anti trust law reasons. Exception: Hubs/Subsidiaries. Please be aware that each user is responsible by himself to observe his regional laws and anti trust regulations. The exchange of strategic information of our competitors has to be judged under antitrust aspects critically and may have restrictive effects on competition. Solely the information about competitors shall be provided being legally obtained.Therefore the strategic information about competitors shall be publically available or the information is considered historically (C) by MTU Friedrichshafen GmbH This data is for the exclusive and confidential use of the addressee during this project. Any other distribution, use or reproduction without MTU's prior consent is unauthorised and strictly prohibited. Printed: 5/1/2020 IJHDFEGCBAINTERSTATE POWERSYSTEMS12V4000L32FBBUILDING DESIGN CONCEPTIowa City LandfillIJHDFEGCBA15234867121011914132000013_1B1436.0480.0534.1636.0284.0264.0168.0TYP12.0 TYP727.7192.0192.0180.01615.9 IJHDFEGCBAINTERSTATE POWERSYSTEMS12V4000L64FNERENCL DESIGN CONCEPTIowa City LandfillIJHDFEGCBA15234867121011914132000013_1B523.6360.0163.6128.2535.7589.7438.054.0142.016.0150.0214.0196.1123.5 Voltage System Parameters Phase Wire Frequency Cross Bus Short Circuit Rating UL Listing Enclosure Type Power Cable Access NEMA 1 For Quote 12V4000L32 Iowa City Landfil One Line Not For Construction Project Name: Quote No. Sheet: Dwg No.: 20-00013_1B of Rev Date By F1 04/23/2020 CCH One-Line 1 1KOHLERPOWER.COM 52-F1 1200 A 52-G1 1200 A 52-G2 1200 A G2 12V4000L32FB 52-U1 1200 A 52-G3 1200 A G3 12V4000L32FB 1155 kW 4,160 V 1155 kW 4,160 V 1200 A, 4160 V, 3 ph Bus Bar 52 52 52 52 52 4,160 VAC 3PH 3W 60 Hz 1200A 50 kA MV Rear 5 kV Switchgear Structure G1 12V4000L32FB 1155 kW 4,160 V FROM UTILITY TO LOADS NGR NGR NGR Attachment O Capstone Microturbine Proposal WWTP & Landfill 1 Johnson, Michael P. (Sioux Falls) From:Jessie Gillis <jgillis@vergentpower.com> Sent:Wednesday, March 4, 2020 11:10 AM To:Johnson, Michael P. (Sioux Falls) Cc:'Justin Rathke'; 'Sumner Bachman' Subject:RE: Iowa City Landfill and WWTP Gas - Turbine Proposal Request Attachments:O_I, C65, ICHP PKG, 528556 C.pdf; 480002 F AG BIOGAS.pdf; 331074 A DS C65 ICHP Digester Gas.pdf; 331105 C DS C1000S LANDFILL GAS.pdf; O_I, C1000S, IND PKG, 534895 A.pdf Follow Up Flag:Follow up Flag Status:Flagged Categories:2 CAUTION: [EXTERNAL] This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello Michael, Thanks for reaching out for more information on Capstone Microturbines for the Iowa City Landfill and WWTP. For the WWTP The system size works out to three C65 (65kW each) microturbines. The gas appears to meet Capstones specification except for the siloxanes. Capstones requirement is any siloxanes detected must be captured prior to use in the microturbine. For the Landfill The system size works out to eleven C200 (200kW each) microturbines. For simplicity I will provide information for two C1000S landfill gas microturbines which would be 2MW. The gas appears to meet Capstones specification. At both sites the gas will need to be dry and pressurized to 100PSI for use in the microturbine. I have attached the following documents to aid in your design. The Application Guide for biogas projects. The C65 O and I drawings. The C65 Digester Gas iCHP data sheet. The C1000S O and I drawing and the C1000S Landfill Gas Data Sheet. For budget pricing: A Grid Connect Only C65 Digester Gas is about $105k. The optional HRM is about another $30k. You would need three of them so I would budget the following. The only two ancillary items to make sure are considered are the gas compression system up to 100PSI and the pumps for the iCHP option. The other thing to consider is controls. I have included basic controls costing we have seen from other simple projects. Three C65 Microturbines $315,000 Optional ICHP HRM $90,000 Controls $35,000 2 A Grid Connect Only C1000S Landfill Gas is about $1.35M. You would need two of them so I would budget the following. The only ancillary item to make sure is considered is the gas compression system up to 100PSI. The other thing to consider is controls. I have included basic controls costing we have seen from other simple projects. Two C1000S Microturbines $1,350,000 Controls $80,000 As for the differences between microturbines and large gas turbines. Microturbines and large gas turbines share a lot of the same properties. Typically we see microturbines as the only viable option on projects up to 3MW. Some of the advantages of the microturbine is this size range are as follows. -Scalability (Simply add more microturbines as site load changes) - Turn down (depending on gas availability the microturbines can be staged on and off) -Redundancy (if one microturbine is down for service the other continue to operate) - Reliability (Capstone averages reliability of 96+% on each system, when multiple microturbines are used together the chances of multiple failures are very low. This is due to the fact the turbines have one moving part spinning at very high speeds on air bearings) -No oil or lubrication (microturbines are air cooled and air lubricated through air bearings) -Inverter based (The microturbines are inverter based meaning they output UPS quality power) - Extremely low emissions - Maintenance ( Capstone will guarantee the cost of all scheduled and unscheduled parts and labor for up to 20 years at a lower cost than other technologies) - Easy installation (UL certified and easy installed by electricians, mechanical contractors, no specialized equipment required) Please feel free to give me a call if you have any questions. If you need formal proposals please let me know. Sincerely, Jessie Gillis, P.Eng Senior Applications and Field Service Engineer Vergent Power Solutions T: 888-282-2071 x3 C: 519-531-0899 E: jgillis@vergentpower.com Check out our new website! https://www.vergentpower.com/ Hello, I am working with the City of Iowa City on a study to develop alternatives for utilizing the biogas produced at their landfill and wastewater treatment facility. I would like to present electricity generation as an option for each facility. Here is some information on the biogas quality and quantity: 3 1. WWTP digester biogas: a. 80 scfm current. b. 102 to 160 scfm future. c. Quality: See attached “Digester gas siloxane results” i. Note that the gas can be conditioned to any quality required. 2. Landfill biogas: a. 850 scfm current. b. 1,000 scfm future. c. Quality: approximately 50 percent methane, 45 percent carbon dioxide, ~1-2 percent oxygen, ~3-5 percent nitrogen, ~1 other pollutants, and 500ppmv H2S. i. Note that the gas can be conditioned to any quality required. Please provide a budget proposal for the following: 1. Gas turbine system to convert biogas to electricity. 2. Gas quality requirements (e.g. does the gas need to be treated before being combusted in the proposed engine?) 3. Budget pricing. 4. Approximate dimensional drawings. 5. List of other ancillary items that may be required. I would like two budget proposals: one for a WWTP gas turbine system and one for a landfill gas turbine system. Please comment on the use of gas turbines vs. microturbines for these applications. Note that this is a planning level study. The costs, dimensions, etc. do not need to be exact and this point. Pricing and other information from previous, similarly-sized projects might be a good place to start. Let me know if you have any questions or if you need any additional information. Thanks! Michael P. Johnson, PE Water/Wastewater Engineer HDR 6300 S. Old Village Place, Suite 100 Sioux Falls, SD 57108 D 605.977.7778 M 605.366.1104 michael.p.johnson@hdrinc.com hdrinc.com/follow-us Reliable power when and where you need it. Clean and simple. Electrical Power Output 65kW Voltage 400/480 VAC Electrical Service 3-Phase, 4 Wire Wye Frequency 50/60 Hz Electrical Efficiency LHV 29% Exhaust Characteristics(1) Fuel/Engine Characteristics(1) Electrical Performance(1) NOx Emissions @ 15% O2 < 9 ppmvd (18 mg/m3) Exhaust Mass Flow 0.49 kg/s (1.08 lbm/s) Exhaust Gas Temperature 309°C (588°F) (Heat Recovery Bypassed) Digester Gas HHV 20.5–32.6 MJ/m3 (550–875 BTU/scf) H2S Content < 5,000 ppmv Inlet Pressure 517–551 kPa gauge (75–80 psig) Fuel Flow HHV 888 MJ/hr (842,000 BTU/hr) Net Heat Rate LHV 12.4 MJ/kWh (11,800 BTU/kWh) ICHP Heat Recovery(2) Integrated Heat Recovery Module Type Stainless Steel Core Hot Water Heat Recovery 70kW (0.24 MMBTU/hr) Ultra-low emissions Accepts fuels with up to 5,000 ppm H2S content One moving part – minimal maintenance and downtime Patented air bearings – no lubricating oil or coolant Integrated utility synchronization – no external switchgear Compact modular design allows for easy, low-cost installation Multiple units easily combined – act as single generating source Remote monitoring and diagnostic capabilities Proven technology with tens of millions of operating hours Various Factory Protection Plans available C65 Microturbine Achieve ultra-low emissions and reliable electrical/thermal generation from digester gas. C65 ICHP Microturbine Digester Gas, ICHP www.capstoneturbine.com 21211 Nordhoff Street | Chatsworth, CA 91311 | 866.422.7786 818.734.5300 ©2016 Capstone Turbine Corporation. P0516 C65 Digester Gas ICHP Data Sheet CAP187 | Capstone P/N 331074A C65 Engine Components (1) Nominal full power performance at ISO conditions: 15˚C (59˚F), 14.696 psia, 60% RH(2) Heat recovery for water inlet temperature of 60˚C (140˚F) and flow rate of 2.5 l/s (40 GPM) (3) Approximate dimensions and weights (4) Height dimensions are to the roofline. Exhaust stack extends at least 178 mm (7 in) above the roofline (5) Clearance requirements may increase due to local code considerationsSpecifications are not warranted and are subject to change without notice. Horizontal Clearance Left & Right 0.76 m (30 in) Front - Grid Connect Model 0.76 m (30 in) Front - Dual Mode Model 1.65 m (65 in) Rear 0.76 m (30 in) Minimum Clearance Requirements(5) Certifications Exhaust Outlet Recuperator Compressor Combustion Chamber Fuel Injector Recuperator Housing Turbine Generator Air Bearings • UL 2200 Listed • CE Certified • Certified to the following grid interconnection standards: UL 1741, VDE, and BDEW • Compliant to California Rule 21 Acoustic Emissions Nominal at Full Power at 10 m (33 ft)65 dBA Dimensions & Weight(3) Width x Depth x Height(4)0.76 x 2.20 x 2.36 m (30 x 87 x 93 in) Weight - Grid Connect Model 998 kg (2,200 lb) Weight - Dual Mode Model 1,364 kg (3,000 lb) C1000S Power Package Reliable power when and where you need it. Clean and simple. Electrical Power Output 1000kW Voltage 400/480 VAC Electrical Service 3-Phase, 4 Wire Wye Frequency 50/60 Hz Electrical Efficiency LHV 33% Exhaust Characteristics(1) Fuel/Engine Characteristics(1) Electrical Performance(1) NOx Emissions @ 15% O2 < 9 ppmvd (18 mg/m3) Exhaust Mass Flow 6.7 kg/s (14.7 lbm/s) Exhaust Gas Temperature 280°C (535°F) Digester Gas HHV 13.0–22.4 MJ/m3 (350–600 BTU/scf) H2S Content <5,000 ppm Inlet Pressure 517–551 kPa gauge (75–80 psig) Fuel Flow HHV 12,000 MJ/hr (11,400,000 BTU/hr) Net Heat Rate LHV 10.9 MJ/kWh (10,300 BTU/kWh) Dimensions & Weight(2) Width x Depth x Height(3)3.0 x 9.1 x 2.9 m (117 x 360 x 114 in) Weight - Grid Connect Model 17,100 kg (37,700 lbs) C1000S Megawatt Power Package The Signature Series Microturbine provides 1MW of reliable electrical power in one small, ultra-low emission, and highly efficient package. Ultra-low emissions Accepts sour gas fuels with up to 5,000 ppm H2S One moving part – minimal maintenance and downtime Patented air bearings – no lubricating oil or coolant Integrated utility synchronization – no external switchgear Compact modular design allows for easy, low-cost installation High electrical efficiency over a very wide operating range High availability – part load redundancy Remote monitoring and diagnostic capabilities Proven technology with tens of millions of operating hours Various Factory Protection Plans available Landfill Gas www.capstoneturbine.com 21211 Nordhoff Street | Chatsworth, CA 91311 | 866.422.7786 818.734.5300 ©2016 Capstone Turbine Corporation. P0316 C1000S Megawatt Power Package Landfill Gas Data Sheet CAP162 | Capstone P/N 331105C C200 Engine Components (1) Nominal full power performance at ISO conditions: 15˚C (59˚F), 14.696 psia, 60% RH(2) Approximate dimensions and weights (3) Height dimensions are to the roofline. Exhaust outlet extends at least 127 mm (5 in) above the roofline (4) Clearance requirements may increase due to local code considerations Specifications are not warranted and are subject to change without notice. Horizontal Clearance Left 1.5 m (60 in) Right 0.0 m (0 in) Front 1.7 m (65 in) Rear 2.0 m (80 in) Minimum Clearance Requirements(4) Planned Certifications Exhaust Outlet Recuperator Compressor Combustion Chamber Recuperator Housing Turbine Generator Air Bearings • UL 2200 Listed • CE Certified • Certified to the following grid interconnection standards: UL 1741, VDE, BDEW and CEI 0-16 • Compliant to California Rule 21 ~--------------8-----------I i D c B A NOTICE TliiS DOCIIIENT CONTAINS INFDIIW<TION WHICH IS BOTH CDNFIDEIITIAL AND PROPRIETARY TO CAPSTONE T\IRBINE CORP. NEITHER TliiS DOCI.IoENT NOll TltE INFDIIIMTION CONTAINED HEREIN SHALL BE COPIED, DISC:LOSED TO DTliERS OR USED FOR ANY PURPOSES BEYO~ THE SPECIFIC PURPOSE FOil l'lltiCH THIS DOCUIIENT WAS DELIVERED WITliOIIT THE EXPRESS WRITTEN PERIIISSION OF CAPSTONE TliiBINE CORPORATION. 1895 CAPSTONE TURBINE CORPORATION -ALL RIGifTS RESERVED NOTES INTERPRET DRAWING PER ASME Y14.5M-1994. 2 ALL DIMENSIONS ARE IN INCHES [MILLIMETERS] 3 ALL DIMENSIONS ARE NOMINAL & ARE TO BE USED AS REFERENCE FOR BUILDING ONLY, UNLESS OTHERWISE SPECIFIED ON THE D~ING. [ij ALL AROUND CLEARANCES SHOULD BE PROVIDED FOR SERVICE ACCESS. ADDITIONAL SERVICE CLEARANCE WILL BE REQUIRED IF USING A FORKLIFT, SERVICE CART, ETC DURING MAINTENANCE. [ID ISO 1811 COMPATIBLE CORNER FITTINGS. 8 MOUNT LEVEL WITHIN 2~ GRADE, SURFACE MUST DRAIN TO PREVENT STANDING WATER. CONCRETE FOUNDATION MUST BE BUILT TO FF/FL OF FF50/FL33 FOR SPECIFIED OVERALL VALUE AND FF25/FL17 FOR LOCAL MINIMUM VALUE. SEE ACI SPEC ACI 302 FOR FURTHER DETAILS. [l] FORKLIFT, SPREADER BARS, PALLET JACK, ETC. , MAY BE USED FOR LIFTING UNIT FROM EITHER SIDE. [!] PROPER RIGGING TO BE PROVIDED DURING LIFTING FOR STABILITY OF THE UNIT. IF LIFTING AT CORNER CASTINGS, SPREADER BARS ARE REQUIRED. WHEN LIFTED USING FORK POCKETS, SUPPORT MUST BE PROVIDED ALL THE WAY THROUGH. [!j SPREADER BAR/BEAM, I-BEAM/PIPE, CHAINS AND LIFTING DESIGN NOT BY CAPSTONE. 10 REFER TO PRODUCT CATALOG FOR OPTIONAL ACCESSORIES. 11 C10DO CONTROLLER WIRING IS CLASS #2 AND FIELD WIRING TO BE CLASS #1. 12 HIGH POWER USER CONNECTION SUITABLE FOR USE WITH EITHER COPPER OR ALUMINUM CONDUCTORS. 13 BOLD DIMENSIONS INDICATE THE MAXIMUM WIDTH, HEIGHT OR DEPTH. 14 ALL VIEWS SHOW GASEOUS FUEL CONNECTION UNLESS OTHERWISE STATED. [§I INTAKE HOOD MUST BE REMOVED WHEN LIFTING AND TRANSPORTING. L------------~------------7 ELECTRICAL POWER DISTRIBUTION BAY (EPDB) 6 BAY A COMMUNICATIONS AND 7 CONTROLS ACCESS ----tirr• {USER CONNECTIONS) FUEL INLET GASEOUS FUEL SHOWN {USER CONNECTION) ELECTRICAL POWER ACCESS {USER CONNECTIONS) ENGINE/ENCLOSURE AIR INLET 6 5 4 5x ENGINE EXHAUST I7IBI15I FORK POCKETS BAY C BAY B REAR VIEW ENGINE BAYS BAY D FRONT VIEW ELECTRONICS BAYS BAY E 3 Bx STANDARD ISO CONTAINER CORNER CASTINGS EPDB AIR EXHAUST ENCLOSURE/ELECTRONICS AIR EXHAUST EPDB AIR INTAKE BAY DOOR 5x BAY DOOR 5x INLET HOOD IILESIIInlliHIWIE81'EC!FIED ~==····-~--..... (13 ·""" ••• 10 COPY IS UNCONTROLLED; USER IS RESPONSIBLE TO VERIFY CURRENT REVISION 2 ------------;-------------l L TR DESCRIPTION A PER ECO 1 05XXX REVISIONS DATE 01/19/17 APPROVED P. BREAULT NO BATTERY CONFIGURATION WEIGHTS HPNG/HPSG DUAL MODE 38,700 LBS 17,550 KG LPG/AlB LPNG/LF DUAL MODE 41,700 LBS 18,900 KG FUELS FUEL INLET MODES DM GC LPNG 4" FLANGE X X HPNG 4" FLANGE X X LPG 4" FLANGE X X LANDFILL 4" FLANGE -X (TYPE A) DIGESTER 4" FLANGE X X (TYPE B) LIQUID SEE DETAIL A X X ••• 0110111e 21211 -F mEET QIIITa.oH, CA 111011 oa/00/16 01/0111• 1111.! O&I, C1000S, IND PKG P. BIIEIU.T oa/01/16 ~·· TltiRD N«<LE .A_ r::1 'D CHE...,. 1 U1 M9 PIIOoJECTION ~-q-""""' NONE 0011; ~·· 534895-001 1 OF 4 D c B A A --------------~-----------------------~------------------------~-----------_____________ !_ __________ _ r··-----------8------------D c NoTicE THIS DOCUMENT COifTAINS INFORMA.TION MUCH IS BOTH CONFIDENTIAL AND PROPRIETARY TO CAPSTONE TUIUIINE CORP. NEITHER THIS DOCUMEifT NOR THE INFORMATION CONTAINED HEREIN SHALL BE COPIED, DISCLOSED TO OTHERS OR USED FOR ANY PURPOSES BEYOND THE SPECIFIC PURPOSE FOR I!HICH THIS ooctMENT WA8 DELIVERED WITHOUT THE EXPRESS WRITTEN PERMISSION OF CAPSTONE TURBINE CORPORATION. 1BII5 CAPSTONE TUIUIINE CORPORATION • ALL RIGIITS RESERVED L 2101] 8 I 21.7 r [552] I 111 • [2tl7] 96.0 [2438] 89.5 [2273] -~1-:2]--~~oia1~ . . . f--.-1 7 .f.J. [3 114.0 .4 032] [2898] 104.3 [2648] 88.0 [2236] J 11.~.J J .____ 11is15] 19.3,J [490] B A (295] 4" [101.8] 150 LB ANSI Fl..ANCIE CONNECTION MATERIAL: SS 304 A GASEOUS FUELS SIDE VIEW CONNECTION BAYS (GASEOUS FUEL SHOWN) FUEL RETURN HEADER CONNECTION 3/4' FNPT DETAIL A INLET FLANGE L------------~------------LIQUID FUEL 7 I 48.0 (1219] 6 5 83.5 1---·-18_1_3_1_ ~~~6~1, ____ __. 1---------~:;~~--------~ 1--------------~~~~·------------~ 4 1----------------~~~;~~--------------~ TOP VIEW 380 0 r---~.~ •• ~ •• ~.---------------------------[81•~.~~----------------------------------, ELEC'I'l'IOtUCI INTAKE\~ r--12.0 EXHAUST STACK D.O. FIL~ \..Y. [305] EXHAU~PPER I.O • 1\ -~~~ I [N'TNCE tiJOO ROT !KJIIJI FOR CLMITY 99.4 ,---~ v 134.;6,-------1 (3418) 1------; 1.4-:;8~··,;'0,------1 1~71~1.4 1---------(41771'-------1 -213.8,------------1 [6429) 225.3 1-----------(672;;1;,----------~ 229.4 1-------------(6S28]'----------~ SKID DRAIN HEADER CONNECTION 1---------------284:;~-.4~,--------------~ [7479] 1/2" FNPT FILTER DRAIN HEADER CONNECTION 1/2' FNPT 3.6 r (89] t 9.0 8 (2 281] ~ 0 ·l_jl 2.7 (89 fo-FRONT VIEW ----'( '?. '( ~ '( '?. '( ~----.~~~-~ ~ .;:g~ -'( ~-1 .2 13.2 (338] t 2.5 [84] -1-----4.9 (124] 352.0 [8841( BOTIOM VIEW 6 5 4 I 5.1 4151 9 [2 6x I 72.0 3 EXHAUST LOADING NOT TO EXCEED 50 LBS [22. PER BAY (1829] 71.8 [1825] J 58.0 [1474] 48.1 J [11711 30.0 r .... lj43] 2 LTR DESCRIPTION SEE SHEET 1 REAR VIEW -11 .. .. I 1 I 1 I I I .. I . -I -18.0 1--JJ [408] r---~~3~1-r---•4ta~9] 68.1 [1478] 3 DETAIL B FRONT DOOR (SCALE 2:1) 2 DETAIL C REAR DOOR (SCALE 2:1) 534895-001 atEn 2 (II 4 D c B A -· A r·-----------··a-··---------D c lHIS DOOJMENT CONTAINS INFO-liON ~ICH 18 BOTH CONFIDENTIAL AND PROPRIETARY TO CAPST1lNE 1\JRBINE CORP. NEITHER lHIS DOCUMENT NOR THE INFORMATION CONTAINED HEREIN SHALL BE COPIED, DISCLOSED T1l OTHERS OR USED FOR NIY PIJRP08E8 BEYOND 1HE SPECIFIC PIR'OSE FOR WHICH THIS OOCLNE.NT WAS DELIVERED WITIIOUT THE EXPRESS liiAITTEN PERMISSION OF CAPBTONE TURBINE CQRP-TION. 1!1!15 CAPSTONE 1\JRBINE CORPORATION -ALL RI811T8 RESERVED 7 6 SERVICE CLEARANCES TOP VIEW NOTE: ADDITIONAL SERVICE CLEARANCE WILL BE REQUIRED IF USING FORKLIFT, SERVICE CART, ETC DURING MAINTENANCE B A 2.3 [67] TYP 4 PLACES [I] DETAIL D CORNER CASTING BOTTOM VIEW (OTHER CORNER CASTINGS MIRRORED) L------------~------------~ D \ DETAIL D 7 380 0 [914-4] I BOTTOM VIEW SUPPORT DIMENSIONS 225.2 [5719] 214.4 [54-45] 6 146.!1 ]3700] 135.1 [3'132] 5 4 3 2 LTR DESCRIPTION ELECTRICAL CONNECTION ACCESS USER CONNECTION ACCESS PANELS ACCESS PANEL FOR USER CONNECTIONS TO ELECTRICAL POWER BAY ... SEE SHEET 1 ..e=F -V .,/ -~ _,.,.-_,-I ACCESS PANEL FOR USER CONNECTIONS TO COMMUNICATIONS BAY [:~I:=L_ 40 ]1018] 48 ]1188] [2~9]~ 18 98 .0 BOTIOM VIEW STANDARD ACCESS LOCATION FOUNDATION DETAILS USE CORNER CASTINGS TO SECURE FRAME TO FOUNDATION. SHIM WHERE NEEDED. USE TOE CLAMP TO SECURE FORK POCKETS TO THE FOUNDATION IF SHIMS ARE ADDED BENEATH. THE FRAME CONTACTS THE FOUNDATION IN SIX (6) PLACES: FOUR (4) CORNER CASTINGS AND TWO (2) FORKLIFT POCKETS / -eo.~ [2184] SIDE VIEW ALTERNATE PUNCH LOCATION ELECTRICAL CONNECTIONS I WIRE TORQUE HIGH POWER IMCM-AWG 600 -MAX 500 IN -LBS 1 mm2 300 -MAX 5.77 KG - M NEUTRAL TO 500 IN -LBS GROUND 5. 77 KG-M / / 12 ~81 MOUNT FRAME LEVEL WITHIN 2% GRADE. SHIM ~ WHERE NEEDED. CONCRETE FOUNDATION MUST BE BUILT FLAT TO FF/FL OF FF50/FL33 FOR SPECIFIED OVERALL VALUE AND FF25/FL17 FOR LOCAL MINIMUM VALUE. SEE AMERICAN CONCRETE INSTITUTE'S SPEC ACI 302 FOR FURTHER DETAILS. D ~ COPY IS UNCONTROLLED; USER IS RESPONSIBLE TO VERIFY CURRENT REVISION 5 4 3 ~ ~ BOTTOM VIEW WEIGHT DISTRIBUTION 2 ]457] PUNCH FOR USER CONNECTIONS TO COMMUNICATIONS BAY PUNCH FOR USER CONNECTION TO ELECTRICAL POWER LOCATIONS ARE APPROXIMATE REQUIRES USER TO MANUALLY PUNCH BOTH LOCATIONS / ~ FRANE CONTACTS FOUNDATION AT THESE LOCATIONS ONLY FRANE CONTACTS FOUNDATION AT THESE LOCATIONS ONLY .... 534895-001 A atfn 3 Of' 4 ~-------------8------------7 6 D c B A TliiS DOCLNENT CONTAINS INFORIIATION lliiCH IS BOTH CONFIDENTIAL AIID PROPRIETARY TO CAPSTONE TURBINE CORP. NEITHER THIS DOCUIIENT NOR TME INFORMATION CONTAINED HEREIN SHALL BE COPIED, DISCLOSED TO on!ERS OR USED FOR AllY PURPOSES BEYOND THE SPECIFIC PliiPOSE FOR 'MilCH THIS DOCUIIENT WAS DELIVERED WITHOUT THE EXPRESS WRITTEN PERMISSION OF CAPSTONE TlJRBINE CORPORATION. 1996 CAPSTONE TlJRBINE CORPORATION -ALL RIGHTS RESERVED CENTER OF GRAVITY C1000S CENTER OF GRAVITY (COG) COG 'X' COG 'Y' COG 'Z' IN [MM] IN [MM] IN [MM] I ~ ...... HP 51 186 50 [1295] [4725] [ 1270] DUAL MODE ....., LP/LF 50 187 49 [1270] [4750] [ 1245] HP 53 187 55 DUAL MODE [ 1346] [4750] [1397] NO BATTERY LP/LF 52 189 53 [1320] [4800] [ 1346] 'r-' HP 54 187 56 [1372] [4750] [1422] GRID CONNECT LP/LF 52 188 54 [ 1320] [4775] [1372] t -~· L BOTTOM LIFT VIA PROPERLY RATED FORKLIFT y ...... ~ D ....., TOP VIEW DO NOT SCALE THIS VIEW ·-~·· 'r-' :o·: '"' -~1.· ,... -~· FRONT VIEW DO NOT SCALE THIS VIEW DESIGN, CERTIFICATION AND SUPPLY OF THE FORKLIFT, SPREADER BAR/BEAM, I-BEAMS/PIPE, CHAINS OR LIFTING STRAPS BY OTHERS. 8 7 6 D ·o: 5 4 3 2 ------------;-------------1 REVISIONS LTR DESCRIPTION DATE APPROVED SHIPPING/LIFTING CONFIGURATION FRONT VIEW EXAMPLE LIFTING METHODS [ZJ ~ ~ B]j FOUR CORNER TOP LIFT VIA PROPERLY RATED GANTRY CRANE 5x EXHAUST BLANKING PLATE 5x DOOR SHIPPING STRAP 5x DOOR BLANKING PLATE COPY IS UNCONTROLLED; USER IS RESPONSIBLE TO VERIFY CURRENT REVISION 5 4 3 REAR VIEW 5x DOOR BLANKING PLATE DOOR SHIPPING STRAP MAXIMUM ALLOWABLE LIFT ANGLE TO BE DETERMINED BY SPREADER BAR MANUFACTURER FOUR CORNER TOP LIFT VIA PROPERLY RATED SPREADER BARS AND CRANE ~--~-534895-001 A 81EET4CF4 2 D c B A Attachment P Capstone Microturbine Biogas Quality Requirement 480002 Rev. F (February 2017) Page 1 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Phone: (818) 734-5300 • Fax: (818) 734-5320 • Web: www.capstoneturbine.com Application Guide Biogas Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 2 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Capstone Turbine Corporation 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Telephone: +1 (818) 407-3600 Facsimile: +1 (818) 734-5382 Website: www.capstoneturbine.com Capstone Technical Support Telephone: +1 (866) 4-CAPSTONE or +1 (866) 422-7786 E-mail: service@capstoneturbine.com Copyright © 2017 Capstone Turbine Corporation. All Rights Reserved. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 3 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Table of Contents 1. Introduction ................................................................................................................. 5 1.1. Safety Information............................................................................................... 5 1.2. Referenced Documents ....................................................................................... 6 1.3. Standard and Code Compliance .......................................................................... 6 1.4. Disclaimer .......................................................................................................... 6 2. Fuel Properties and Requirements ............................................................................... 7 2.1. Biogas Sources .................................................................................................. 7 2.2. Hydrogen Sulfide (H2S) ....................................................................................... 7 2.3. Fuel Moisture and Dew Point Suppression ........................................................... 8 2.4. Siloxanes ........................................................................................................... 8 3. Fuel Conditioning System .......................................................................................... 11 3.1. Low Pressure Fuel Conditioning ........................................................................ 12 3.1.1. Shutoff Valve ........................................................................................ 12 3.1.2. Vapor-Liquid Separator ......................................................................... 12 3.1.3. Filter Element ....................................................................................... 13 3.1.4. Flame Arrestor (Optional) ...................................................................... 13 3.1.5. Dryers/Chiller Systems (Optional) .......................................................... 13 3.2. Compressor Systems ........................................................................................ 14 3.3. High Pressure Fuel Conditioning ....................................................................... 14 3.3.1. Compressor After-Cooling or Economizer .............................................. 14 3.3.2. Particulate/Coalescing Filter .................................................................. 14 3.3.3. Dryers/Chiller Systems .......................................................................... 15 3.3.4. Liquid Knockout Vessels ....................................................................... 15 3.3.5. Siloxane Removal Systems ................................................................... 16 3.4. Fuel Heating ..................................................................................................... 16 3.4.1. Heating Methods ................................................................................... 16 3.4.2. Heat Tracing ......................................................................................... 17 3.5. Final Fuel Preparation ....................................................................................... 17 3.5.1. Filtration ............................................................................................... 17 3.5.2. Final Regulation .................................................................................... 18 Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 4 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. List of Figures Figure 1. Chemical Structure for a Siloxane (D4) Molecule ................................................. 9 Figure 2. General Fuel Conditioning System Diagram ...................................................... 11 Figure 3. Biogas Fuel Conditioning Process Flow Diagram ............................................... 12 List of Tables Table 1. Referenced Capstone Documents ........................................................................ 6 Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 5 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. 1. Introduction This Biogas Gas Application Guide provides supplementary, application-specific information for use by Capstone business partners and end-users. It presents fuel application information for Capstone Microturbines operating on landfill gas or digester gas. These two methane-based gases may be referred to generically as “biogas”. Compliance with the requirements detailed in this document is essential to avoid problems that may affect the performance, life, reliability, warranty, and in some cases, the safe operation of the Capstone Microturbine. Capstone bases its warranty on multiple factors, including the quality of the fuel at the Microturbine inlet. Operational fuel requirements for the Capstone Microturbine are provided in Capstone Microturbine Fuel Requirements Technical Reference (410002). The business partner and/or end-user is responsible for: • Assessing the need for fuel conditioning. • Selecting and properly installing, operating, and maintaining the appropriate fuel conditioning equipment. For additional information regarding fuels and fuel usage, please refer to the Capstone Microturbine Fuel Requirements Technical Reference (410002). This document supports the necessity for proper fuel delivery design and installation in compliance with all applicable state and local codes. In the event of any conflict between the information provided in this document, and the information and requirements contained in the Capstone Microturbine Fuel Requirements Technical Reference (410002), the Fuel Requirements Technical Reference shall take precedence. 1.1. Safety Information Read and understand the Safety Information section of the applicable Capstone User’s Manual and any referenced Work Instructions or other installation, service or maintenance documents before operating or working on Capstone Microturbines and related equipment. Any work on gas or electrical interfaces or internal equipment is restricted only to a certified Capstone Authorized Service Provider (ASP). User personnel must not open or work on any Capstone equipment unless they have successfully completed Capstone’s ASP training course for the applicable equipment. Give special consideration to minimize the exposure of workers to both the biogas and condensate as they perform maintenance on the systems. Purge valves and purge gas systems, bypass lines, media replacement hatches, and media maintenance procedures, in addition to ventilation requirements, are important considerations. In addition, all workers must have the proper safety and hydrogen sulfide (H2S) training. It is the user’s responsibility to read and obey all safety procedures. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 6 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. 1.2. Referenced Documents Table 1 lists Capstone documents referenced by this Application Guide. Table 1. Referenced Capstone Documents Document No. Description 410002 Fuel Requirements Technical Reference 440384 Standard Maintenance Schedule Work Instruction, C30 440385 Standard Maintenance Schedule Work Instruction, C65 440386 Standard Maintenance Schedule Work Instruction, C200/C1000 Series 1.3. Standard and Code Compliance Capstone Microturbines are designed and manufactured to comply with applicable national and international standards. These standards include those established by the International Organization for Standards (ISO), Institute of Electrical and Electronic Engineers (IEEE), the American National Standards Institute (ANSI), and European Conformity (CE). Capstone Microturbines also carry a number of third-party certifications. Consult the applicable Product Specification for a list of certifications. Compliance with applicable local and national codes is the installer’s responsibility. Standards and codes vary by municipality, region, country, and application. Some areas may require a certificate–of–need, zoning permit, building permit or other site-specific certificate. Be sure to contact all local government and/or regulatory authorities early in the planning process to establish requirements, and check periodically for updates. 1.4. Disclaimer Information in this document represents data available at the time of publication. Capstone Turbine Corporation reserves the right to change this document and the products represented without notice and without any obligation or liability whatsoever. All instructions and diagrams have been checked for accuracy and simplicity of application. However, the skills of the installer are most important. Capstone Turbine Corporation does not guarantee the result of any installation described in this document. Capstone Turbine Corporation cannot assume responsibility for any injury or damage to property. Persons engaging in installation do so entirely at their own risk. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 7 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. 2. Fuel Properties and Requirements 2.1. Biogas Sources Biogas originates from the anaerobic digestion of organic waste materials. Anaerobic digestion is a biological process performed by microbes and bacteria as they consume organic waste materials in the absence of oxygen. The process occurs in the presence of water, ideally at a temperature and pH controlled to optimize the digestion reactions and the health of the microbes/bacteria. The primary byproducts of this process are methane (CH4) and carbon dioxide (CO2), with the solid residues rendered essentially inert. Biogas is generally sour gas, containing H2S up to as high as 2%v, while high CO2 content makes it acidic as well. Biogas condensate is a foul-smelling, noxious material that contains some difficult-to-handle compounds. There are two major sources of biogas. One source is “digester gas”, produced from an enclosed anaerobic digester, where organic waste is processed in batches to produce the biogas. Typically, the methane content of digester gas is between 60 and 70% but can vary depending on the level of control over the digester process and the availability of waste inputs. Common waste inputs include human waste from waste water treatment plants, animal waste from farms, spent grain from brewery and ethanol plants, and waste products from food and drink processing plants. The other major source of biogas is “landfill gas”, where the anaerobic digestion is naturally distributed throughout a landfill. The gas is gathered through a collection system for use at a central location. In the landfill gas application, the methane percentage typically varies from 35% to 65%. If the landfill is producing less than 35% methane, natural gas can be blended with the fuel to increase energy content.1 2.2. Hydrogen Sulfide (H2S) Hydrogen sulfide is a common and naturally occurring compound found in oil & gas production. The concentration can vary from 0% to over 90% of the gas concentration. Fuels containing hydrogen sulfide are referred to as “sour”, in reference to the odor of H2S at low concentration. Hydrogen sulfide is an extremely dangerous gas and is toxic to humans even at low concentrations. Special care and training are necessary when dealing with fuels containing hydrogen sulfide. Hydrogen sulfide is corrosive to metals and sealing materials, although some materials are more corrosion-resistant than others. The level of H2S content in the fuel will impact the selection of both microturbine model and each component of a raw natural gas fuel conditioning system. Capstone Medium Btu and Sour Gas fuel system products can handle varying amounts of H2S, and the specific limits for each product line are described in the appropriate Product Specification documents. Corrosion in fuel conditioning system components can shorten equipment lifetimes, reduce reliability, and increase the risk of sending out-of-specification fuel to the microturbine. Similarly, higher-than-allowable H2S levels in the microturbine can cause premature failure 1 Calorific value (average Higher Heating Value, or HHV) must be at least 13.04 MJ/m3 (350 Btu/ft3). Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 8 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. of fuel system components, injectors, combustion liners, and, if allowed to progress too long, catastrophic engine failure and fire risk. Project developers should be aware that any hydrogen sulfide in the fuel will be combusted to form sulfur oxides in the exhaust, which in many parts of the world are regulated as polluting emissions. Contact your local air quality regulating body for more information. 2.3. Fuel Moisture and Dew Point Suppression Capstone Microturbines have a strict “dew point suppression” requirement, which is a statement about the required degree of moisture removal to protect the microturbine from internal condensation. The fuel temperature at the microturbine inlet must be at a minimum of 10°C (18°F) above its dew point temperature, or 0°C (32°F), whichever is higher. Always assume that biogas fuel is fully saturated2 with water vapor. The gas contains water present in the landfill or digester source, and from the possibility of liquid water at low points in piping systems where evaporation humidifies the fuel stream. Warm, low-pressure biogas can hold a relatively higher amount of water vapor than cool, high-pressure biogas. Any cooling of the gas in process piping (usually due to ambient temperatures lower than the fuel temperature) will cause condensation. Likewise, any compression of the gas will also cause condensation. The condensate will contain liquid water and impurities resulting from the biogas source, and it must be disposed of accordingly. Aside from the direct impacts that moisture may have in the microturbine itself (which may include stuck fuel valves and plugged fuel injectors), moisture may also present a significant indirect effect to the microturbine. Failure to prevent condensation inside the microturbine can seriously damage or destroy the engine. 2.4. Siloxanes The limitations in the Fuel Requirements Technical Reference (410002) regarding the presence of siloxanes are specific to both landfill gas and wastewater treatment plant digester gas. Siloxanes must be limited to a maximum of 5 parts per billion (ppb) by volume. This is approximately the detection limit for siloxanes, which implies that the fuel must contain no detectable level of siloxanes. Siloxanes are composed of silicon (Si), carbon (C), hydrogen (H), oxygen (O). They are relatively volatile organic/silicon compounds manufactured and used as a basic building block monomer for polymerized silicone formations. Further, siloxanes are used extensively in consumer products as a volatile dispersant agent to help evenly spread organic-based specialty chemicals. Some of these products include deodorant, lipstick, and makeup. As man-made compounds that typically are washed down the drain or thrown in the trash, siloxanes are ALWAYS found in landfill gas and wastewater treatment plant digester gas. However, siloxanes are NOT likely to be found in certain other types of digester gases. Examples of biogas sources operations that are likely to produce siloxane-free digester gas include: • Dairy and hog farms (manure digesters). 2 “Fully saturated” means that the fuel gas has absorbed the maximum possible water vapor content for the worst case temperature and pressure state. At this state, the dew point temperature is equal to the fuel temperature. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 9 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. • Breweries and ethanol plants. • Food processing plants. Analysis of biogas from wastewater treatment plant digesters and landfills reveals that cyclic (ring-structure) siloxanes are the most prevalent form. Figure 3 illustrates the structure of a specific siloxane molecule, commonly called D4, found in wastewater treatment plant digester gases. However, since many other types of siloxanes may be present in biogas, a complete fuel analysis should be performed to identify the types and quantities of other siloxane molecules present, so that the appropriate graphite media may be used for optimal filtration. Figure 1. Chemical Structure for a Siloxane (D4) Molecule Siloxanes have limited water solubility, and they agglomerate in the solids (sludge) fed to digesters at wastewater treatment plants. In the hot environment of digesters, concentrations of volatile siloxanes increase due to the decomposition of silicones and other polymers composed of siloxanes. As a result, the concentration of siloxanes in digester gas is in the measurable ppb (parts per billion) or ppm (parts per million) range. As biogas that contains siloxanes is combusted, the silicon reacts with oxygen to form silicon dioxide (SiO2), a solid white powder commonly known as silica. Sand (quartz) is nearly pure silica. Silica particles are abrasive and have a very high melting temperature. When siloxanes are present in the fuel to a Capstone Microturbine, tiny particles of silica form in the combustion section. The silica particles travel with the exhaust gases at very high speeds through the nozzle vanes into the turbine wheel, and then exit through the recuperator and heat exchanger (if installed). Over time, these abrasive particles can cause erosion of some of the metal surfaces they contact, as well as fouling and plugging of heat exchanger surfaces - leading to a gradual increase in fuel consumption and exhaust temperature and a decrease in system efficiency. Additionally, silica may deposit all throughout the combustion section of the microturbine and behind the turbine wheel, which could lead to seizing of the turbine shaft. Troublesome silica deposits and erosion have also been found in gas turbine and internal combustion engine-driven power generating equipment used for landfill gas and digester gas. These deposits are often found on the cylinder heads and rings of internal combustion Siloxane (D4) CH3 Si CH3 CH3 Si CH3 O OO O CH3 Si CH3CH3Si CH3 (Octamethylcyclotetrasiloxane) Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 10 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. engines, and on the heat recovery steam generator tubes of gas turbines. Maintenance and rebuild requirements tend to be very high, as shown by unit availability data. It is not uncommon for internal combustion engines at waste water treatment plants to have top-end rebuilds twice a year. As more stringent NOx emission requirements are imposed, generators other than Capstone Microturbines are being forced to incorporate post-combustion catalytic controls. Silica particles in the exhaust gas from these generators operating on biogas have been observed to blind the catalyst and render it ineffective within a few hours of operation. For these reasons, as technology is driven towards higher performance levels and lower emissions, siloxane removal is expected to become a more common process step in all biogas power generation systems, not just in Capstone Microturbine systems. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 11 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. 3. Fuel Conditioning System Proper maintenance of the fuel delivery system is imperative for the microturbine to perform properly and remain within its routine maintenance intervals. Designers and/or end-users with little or no practical experience in installing and/or operating a biogas-to-energy project may benefit from using services of companies experienced in this field. Capstone does not recommend that those inexperienced in biogas applications undertake such projects without engaging appropriately skilled personnel as these can be particularly technically challenging applications. Capstone is not responsible for the design, installation, or operation of the fuel conditioning and delivery system, including the siloxane filtration system. Capstone can assist business partners and end-users in the selection of appropriate equipment, and in the design and integration of the fuel processing equipment into the overall installation. The Capstone business partner or end-user is responsible for the fuel delivery system, and may use any equipment that reliably meets the Capstone Microturbine fuel inlet requirements. These decisions depend on existing site features, the preferences of the designer and end-user, and the size of the application. The use of industry-accepted, proven technology for compression and drying of landfill gas and digester gas is essential. There are many vendors worldwide with significant experience in biogas fuel conditioning, and you should work with these vendors to specify the best system for your specific application. Figure 2 shows a general system diagram with the four major subsystems of a complete fuel conditioning system. Figure 3 shows a more detailed process flow diagram with the particular components discussed in this document. Figure 2. General Fuel Conditioning System Diagram Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 12 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Figure 3. Biogas Fuel Conditioning Process Flow Diagram Though often similar, every biogas installation is unique. Not all equipment will be required for every application, and the steps may appear in different sequences in different applications. Take proper care when engineering the fuel conditioning system for a given application. 3.1. Low Pressure Fuel Conditioning Components in this section primarily protect or simplify downstream equipment from one or more properties of the raw biogas fuel. This could be moisture, particulate, or temperature for example. 3.1.1. Shutoff Valve An inlet shutoff valve must be installed to lock out the fuel delivery system and microturbine from the fuel source. This can be any type of valve that provides a vapor tight seal and is compatible with the fuel components. In some cases this may be an automated valve, which will fail closed if the system shuts down or fails. 3.1.2. Vapor-Liquid Separator Certain biogas raw fuel piping systems will deliver gas with entrained liquid. Low points in the upstream fuel delivery piping can collect liquid condensation, and the high velocity gas may periodically push “slugs” of liquid into the fuel conditioning system. Install a vapor-liquid separation vessel (“slug catcher” or bulk knockout vessel) at the entry to the system to catch this liquid and protect downstream equipment. If no bulk knockout vessel is used, Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 13 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. downstream coalescing filters or compressor systems not designed to handle liquid condensate may be overwhelmed. This equipment need not be sophisticated, and is usually a steel vessel with an expanded diameter and centrifugal path which forces the condensate droplets to the wall of the vessel and form droplets. The liquids drain to the bottom and are disposed of in a condensate removal system. A demister pad is often installed inside the vapor-liquid separator to further remove fine liquid droplets. 3.1.3. Filter Element Common applications employ coalescing, mesh-pad, cyclonic, or baffled filters made of stainless steel. This type filter may be acceptable for an application for a pressurized system, but are not always appropriate for filtration at very low pressure (i.e., at the compressor inlet). For the low-pressure filter, great care should be taken in both selecting the filter size and type. The approach will be different from one site to another, depending on ambient temperatures, fuel type, moisture content, existing fuel treatment, etc. In many cases, filtration of both entrained liquids and particulates can be achieved using a properly rated coalescing filter to maximize the protection of downstream equipment. Liquid-collecting filters must be drained into an appropriate condensate removal system. 3.1.4. Flame Arrestor (Optional) Installation of a flame arrestor is optional. Selection is dependent on the pipe size, fuel type, and local code requirements. If a flame arrestor is required, a flame arrestor dealer can help with sizing and selection. 3.1.5. Dryers/Chiller Systems (Optional) Gas compressor specifications for inlet temperature and dew point suppression may justify the use of low pressure dryer or chiller systems ahead of the compressor suction inlet. Biogas from an anaerobic digester, and at some landfills, may arrive at the pretreatment system at temperatures in excess of 122°F (50 °C). As discussed previously, the fuel coming to the gas compressor will probably be saturated with moisture. Since the ability of this type of fuel to hold moisture increases dramatically with temperature, pre-cooling the fuel to a lower temperature will often be required to remove the resulting condensate (see Figure 1). This ensures that the moisture in the fuel does not leave the vapor state as it passes through the gas compressor. Past experience with rotary vane compressors has shown the dew point temperature of the fuel entering the gas compressor should be lower than 60°F (15°C) for maximum protection of the compressor, but if 60°F (15°C) or lower dew point temperatures cannot be achieved, then the lowest possible dew point temperatures should be obtained. In some cases, it may be possible to modify the compressor (working with the compressor supplier) to run hotter internally to prevent moisture from condensing within the compressor; although this is not always a viable option. Refrigerated dryers are integrated units including fuel gas heat exchangers, self-contained electric-powered refrigerator systems, and coalescing filtration systems. Many refrigerated dryers use timer-based drainage systems to purge the collected condensate. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 14 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Chiller systems are very similar except for they are usually assembled “a la carte”. An electric chiller loop will require an evaporator heat exchanger (for cooling the fuel gas), a refrigerant piping and pumping system, and a condenser system (e.g. evaporative condensers, air coolers, or cooling tower/condenser packages). Common working fluids for chiller loops are water or glycols. After the evaporator heat exchanger, a coalescing filter should be added to remove the liquid phase condensate and any remaining droplets. Any coalescing filter stage may collect liquids that must be removed using a condensate removal system. 3.2. Compressor Systems Early Capstone biogas installations have shown that the use of industry-accepted, proven technology for compression and drying of landfill gas and digester gas is essential. Capstone business partners and end-users have significant experience with both rotary sliding vane and screw compressors for biogas applications. Both have shown a tolerance for (H2S) in low to moderate levels. The ability of the gas compressor to successfully operate over a long term is strongly dependent on the maintenance of the compressor system. For oil-flooded compressors, the levels of (H2S) and gas moisture content will degrade the oil, and will determine the actual frequency of oil and oil filter changes required. Thus, it may be necessary to periodically sample and test the oil to determine the frequency of required compressor oil changes to maintain compressor life and performance. Many compressors used for biogas require specific oils for both compressor lubrication and to provide some degree of protection against corrosion. 3.3. High Pressure Fuel Conditioning 3.3.1. Compressor After-Cooling or Economizer Some compressors systems include integrated after-coolers, which are usually a radiator type heat exchanger and fan. Other compressor systems may be more “a la carte” in which case separate air coolers may be specified. Other systems will use an economizer, which provides the dual benefits of cooling the hot compressor gas and heating the cool gas from the post-chiller, post-knockout high pressure line. The economizer is a suitable gas-gas heat exchanger. This hot compressor output gas can be considered a “free” source of heating to support the goal of microturbine dew point suppression. 3.3.2. Particulate/Coalescing Filter Since a significant portion of the overall condensate formed will occur during the after- cooling process of the gas compressor, it is recommended that some form of liquid/gas separation take place after the gas compressor, so that the operation of a refrigerated dryer/chiller is not impaired or rendered less efficient by the presence of entrained condensate. This type of filter was described above in Section 3.1.4. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 15 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. 3.3.3. Dryers/Chiller Systems Depending on the specific application, if additional dew point suppression is required on the high pressure system, dryers or chiller systems can be used. Dryer and chiller equipment was described in Section 3.1.4; these comments also apply for the high pressure side, but the equipment must be rated for the higher pressures. Many refrigerated dryers use timer-based drainage systems to purge the collected condensate. Since many of these dryers are placed after the gas compressor, but still in close proximity to the compressor discharge, there is the possibility that the dryer draining periods will cause a local drop in pressure that can be detected by the gas compressor. This condition often results in a cycle of the compressor rpm (for systems with a variable speed drive) each time the dryer opens its drain. If these occurrences are severe and occur rapidly, it may result in an accelerated loss of compressor oil into the gas stream. This situation, however, may be addressed in several ways, from the addition of a small buffer tank, to the addition of a small restriction in the dryer drain line that minimizes gas loss and local pressure fluctuation. Note that if the siloxane filter vessel is located relatively close to the compressor and dryer, the vessel may double as a high-pressure buffer tank. This minimizes the pressure fluctuation that would otherwise be seen by the microturbines while assisting the gas compressor to cope with the local loss in pressure from the refrigerated dryer drain. 3.3.4. Liquid Knockout Vessels This filter/vessel system is generally a larger capacity system used for removing all of the accumulated liquid condensate and entrained droplets present at this lowest-temperature, highest-pressure point of the system. Removal of all liquid droplets at this point is critical, as the dew point suppression heating after this stage will not generally be rated to re-vaporize any liquids. While functionally similar to the coalescing filters described earlier, they are distinct in removal capacity and are critical to the fuel conditioning system goal of dew point suppression. Carefully select the types of liquid/gas separators used in such a system. Common applications employ coalescing, mesh-pad, cyclonic, or baffled separators made of stainless steel. Such separators may be acceptable for an application for a pressurized system, but these types of separators are not always appropriate for separation at very low pressure (i.e., at the compressor inlet). The approach will be different from one site to another, depending on ambient temperatures, fuel type, moisture content, existing fuel treatment, etc. To optimize reliability of the fuel conditioning systems, oversizing these vessels is common, with the added benefit of extending service intervals. Adding intelligence to detect filter stage clogging or excess condensate levels is also important on this critical equipment. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 16 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. 3.3.5. Siloxane Removal Systems In some biogas applications, it may be necessary to filter for siloxane compounds. The presence of siloxanes in some biogases is discussed in Section 2.4. Many of the filters that are used for siloxane removal come with their own dew point suppression requirement; if these filters are contaminated by liquid condensate they may become ineffective and allow siloxanes to reach the microturbines. This dew point suppression is accomplished by placing the siloxane removal after a dryer or chiller system, as discussed in the previous section. While the siloxane filter can be placed either before or after the compressor, the placement decision will affect the pressure rating, overall size, and cost of the vessel and graphite media replacement. The siloxane filter is usually placed on the high pressure side of the system to minimize vessel size and reduce media replacement costs. Other factors should be considered when determining the overall configuration and layout of the equipment, including the siloxane filter. A lead-lag vessel system is strongly recommended to allow for gas sample collection and testing between the two vessels. This will allow for the detection of siloxanes breaking through the first filter vessel without exposing the turbines to unfiltered fuel. Through use of bypass piping and manual valves, the spent media in the first vessel can then be bypassed while it is replaced, and the second vessel becomes the primary vessel for the next media cycle. Hydrogen sulfide (H2S) is normally present in biogas, and is preferentially absorbed in graphite media. Sites with high H2S content in the biogas may require more extensive fuel treatment systems (possibly including separate H2S removal) to ensure complete removal of siloxanes with reasonable run lengths between graphite media changes. 3.4. Fuel Heating Fuel heating is important on many projects to preserve dew point suppression. Dew point suppression is defined as the total temperature rise above the fuel dew point temperature, which is established at the final knockout/separation occurring at the lowest-temperature point in the high pressure system. Dew point temperature can be estimated by Capstone Applications Engineering upon request by providing a fuel composition report and fuel conditioning system details including a P&ID drawing. 3.4.1. Heating Methods Heating above the dew point can be provided by several means. Most commonly, an economizer and/or fuel heater are added in the fuel system after the high pressure fuel conditioning equipment. The economizer is often a simple, cost-effect and high-efficiency solution. A downstream fuel heater could be electrically powered, gas powered (such as a catalytic heater), or could use an available waste heat source (such as microturbine exhaust). Energy efficiency and minimizing parasitic loads is generally important for grid-connected biogas projects, so seeking opportunities for increasing overall site efficiency can improve customer payback and satisfaction. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 17 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Sunlight and ambient air convection can help heat the fuel piping, but this is not a reliable method as weather and seasons change. Furthermore, pipe insulation is generally added to minimize heat loss during the colder seasons, which will limit the available contribution from sunlight and ambient air. 3.4.2. Heat Tracing Heat tracing is an electric heating cable designed specifically to maintain dew point suppression. For a variety of reasons, the fuel conditioning system cannot always be located near the microturbines. For any long pipe runs, adding heat tracing and insulation may be necessary to maintain dew point suppression during all seasons. Consider wrapping heat tracing around any larger components like valves, regulators, and filters so that the large thermal capacity of the metal does not cause inadvertent local cooling to the fuel stream. 3.5. Final Fuel Preparation The following final fuel preparation components are required for every microturbine installation. 3.5.1. Filtration Particulate/coalescing filtration is required for each microturbine fuel inlet3 per the Capstone Fuel Requirements Technical Reference (410002), the O&I drawings, and the P&ID drawings. After commissioning microturbines using biogas as fuel, inspect the required coalescing filters once a week during the first month of operation. These inspections will determine whether the filters are wet or dry, and if they are collecting significant amounts of particulate matter (such as carbon particles from the siloxane filters). If the filters are wet, the gas does not meet the dew point suppression requirement. As a consequence, performance of the microturbine will be impacted, and the warranty may be voided if damage to fuel system components or engine is caused by fuel moisture. If this occurs, take immediate corrective action; following the corrective action, replace the filter elements, and continue checking once a week for several weeks, to verify that the filters remain dry. Note that the inside surface of the cylindrical filter element is the surface that collects the particulate matter. Once the weekly filter inspections have verified that the fuel is clean and dry, inspect at least one filter every month for several months. Depending on the results of these inspections, it may be necessary to change the filter elements more often than every 8,000 hours (which is the guideline for pipeline-quality natural gas), as noted in the microturbine Standard Maintenance Work Instruction (see Table 1). Inspect fuel filters within 1000 hours of a siloxane filter media change. The change of the siloxane media introduces new particulate impurities to the system that will likely be captured by the fuel filters at the microturbine inlet (if the siloxane removal system is placed as shown in Figure 1). Thus, it may be necessary to change the fuel filters soon after a 3 Capstone offers a Sour Fuel Option Kit accessory for C30 and C65 applications that includes a particulate/coalescing filter, pressure regulator, shutoff ball valve, bleed ball valve, and pressure gauge. Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: Biogas 480002 Rev. F (February 2017) Page 18 of 18 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. change of the siloxane filtration media to ensure that the fuel filters do not become significantly clogged and allow additional impurities to pass into the microturbine. 3.5.2. Final Regulation Each microturbine fuel inlet must be equipped with a fuel pressure regulator as detailed in the Capstone Fuel Requirements Technical Reference (410002), the O&I drawings, and the P&ID drawings. This regulator will improve reliability by lessening the impact of fuel system pressure dynamics on combustion stability. For example, the accessory Sour Gas Fuel Option Kit requires 12-15 psig pressure drop across the pressure regulator. This pressure drop allows the regulator to adequately protect the microturbine from most moderate pressure fluctuations upstream of the regulator as well as the fluctuations caused by the starting/stopping of additional microturbines consuming fuel from the same fuel header. A steady and sufficient fuel pressure at the microturbine inlet will result in reliable microturbine operation. Attachment Q Biogas Utilization Alternatives Opinions of Probable Capital and O&M Cost – No Diversion Scenarios CostsBlower Building $240,000H2S Removal SystemUnison$105,000Blower/Moisture RemovalUnison$350,000Siloxane RemovalUnison$165,000H2S System Heated EnclosureUnison$100,000Upgrading System (2-Pass)Unison$950,000Upgrading System (3-Pass)Unison$290,000Upgrading System Heated EnclosureUnison$165,000General Site/Civil Work$100,000Concrete Pad$50,000Interconnecting Piping$100,000Site Piping$75,000Electrical Equipment$474,000Instrumentation & Control Equipment$20,000$3,184,000Process Installation15% of subtotal $477,600Electrical Installation15% of subtotal $477,600Contractor Overhead and Profit15% of all capital $620,880Mobilization6% of all capital $285,605Bond, Insurance, Taxes3% of all capital $124,176Contingency30% of all capital$1,550,958Detailed Design and Construction Admin15% of all capital$1,008,123MidAmerican Energy Connection Fees$897,012$8,626,000H2S Removal System - Media Changeoutannualized$27,010Siloxane Removal System - Media Changeoutannualized$635,000Gas Conditioning System Electricity Costsannualized$125,268General Maintenance - Parts and Labor2.5% of capital subtotal$79,600MidAmerican Energy Yearly Pipeline Usage Feeannualized$486,365$1,353,243Capital Cost SubtotalTotal Adjusted Base Bid with InstallationAnnual O&M CostAnnual O&M CostsCapital CostAlternative 1a: WWTP RNG for Pipeline InjectionUnison Solutions Equipment CostsBlower Building $750,000H2S Removal SystemUnison$630,000Gas Compression/Moisture RemovalUnison$420,000Siloxane RemovalUnison$198,000H2S System Heated EnclosureUnison$360,000Upgrading System (2-Pass)Unison$3,600,000Pressure Swing Adsorption (O2 and N2 Removal)Guild Associates$4,080,000General Site/Civil Work$100,000Concrete Pad$80,000Interconnecting Piping$200,000Site Piping$75,000Electrical Equipment$790,000Instrumentation & Control Equipment$20,000MidAmerican Energy Connection Fees$713,477$12,016,000Process Installation15% of subtotal $1,802,400Electrical Installation15% of subtotal $1,802,400Contractor Overhead and Profit15% of all capital $2,343,120Mobilization6% of all capital $1,077,835Bond, Insurance, Taxes3% of all capital $468,624Contingency30% of all capital$5,853,114Detailed Design and Construction Admin15% of all capital$3,804,524$29,168,000H2S Removal System - Media Changeoutannualized$131,400Siloxane Removal System - Media Changeoutannualized$400,000Pressure Swing Adsorption System Maintenanceannualized$59,000Unison Electricity Costsannualized$722,700PSA System Electricity Costs$275,000Maintenance - Parts and Labor2.5% of capital subtotal$300,400MidAmerican Energy Yearly Pipeline Usage Feeannualized$403,563Annual O&M Costs$2,292,063Capital CostCapital Cost SubtotalTotal Adjusted Base Bid with InstallationAnnual O&M CostAlternative 1b: Landfill RNG for Pipeline InjectionUnison Solutions Equipment CostsMicroturbine Building $1,500,000Gas Compression/Moisture RemovalUnison$350,000Siloxane RemovalUnison$165,000MicroturbinesCapstone$880,000General Site/Civil Work$100,000Concrete Pad$50,000Interconnecting Piping$70,000Site Piping$50,000Electrical Equipment$475,000Instrumentation & Control Equipment$20,000$3,660,000Process Installation15% of subtotal $549,000Electrical Installation15% of subtotal $549,000Contractor Overhead and Profit15% of all capital $713,700Mobilization6% of all capital $328,302Bond, Insurance, Taxes3% of all capital $142,740Contingency30% of all capital$1,782,823Detailed Design and Construction Admin15% of all capital$1,158,835Eastern Iowa Light and Electric (REC) Connection Fees$500,000$9,384,000Siloxane Removal System - Media Changeoutannualized$635,000Electricity Costs for Gas Conditioning Systemannualized$125,268Capstone Maintenance Plan$49,196General Maintenance - Parts and Labor2.5% of capital subtotal$91,500$900,964Alternative 2a-1: WWTP Electricity Generation - MicroturbinesMicroturbinesCapstone TurbinesCapital CostCapital Cost SubtotalTotal Adjusted Base Bid with InstallationAnnual O&M CostAnnual O&M Costs CostsEngine Generator Building $2,250,000Biogas Conditioning Syst. (H2S, Siloxanes, Moisture)MTU$1,352,600Engine GeneratorsMTU$993,400General Site/Civil Work$100,000Concrete Pad$50,000Interconnecting Piping$70,000Site Piping$50,000Electrical Equipment$475,000Instrumentation & Control Equipment$20,000$5,361,000Process Installation15% of subtotal $804,150Electrical Installation15% of subtotal $804,150Contractor Overhead and Profit15% of all capital $1,045,395Mobilization6% of all capital $480,882Bond, Insurance, Taxes3% of all capital $209,079Contingency30% of all capital$2,611,397Detailed Design and Construction Admin15% of all capital$1,697,408Eastern Iowa Light and Electric (REC) Connection Fees$500,000$13,513,000Siloxane Removal System - Media Changeoutannualized$635,000Non-Media Consumablesannualized$5,000Gas Conditioning System Electricity Costsannualized$125,268MTU Engine Generator Maintenance Plan$167,325General Maintenance - Parts and Labor2.5% of capital subtotal$134,025$1,066,618Annual O&M CostAnnual O&M CostsMTUCapital CostCapital Cost SubtotalTotal Adjusted Base Bid with InstallationAlternative 2a-2: WWTP Electricity Generation - Engine GeneratorsEngine Generators CostsMicroturbine Building $1,125,000Gas Compression/Moisture RemovalUnison$420,000Siloxane RemovalUnison$198,000MicroturbinesCapstone$1,716,000General Site/Civil Work$100,000Concrete Pad$50,000Interconnecting Piping$70,000Site Piping$50,000Electrical Equipment$950,000Instrumentation & Control Equipment$20,000$4,699,000Process Installation15% of subtotal $704,850Electrical Installation15% of subtotal $704,850Contractor Overhead and Profit15% of all capital $916,305Mobilization6% of all capital $421,500Bond, Insurance, Taxes3% of all capital $183,261Contingency30% of all capital$2,288,930Detailed Design and Construction Admin15% of all capital$1,487,804MidAmerican Energy Connection Fees$800,000$12,207,000Siloxane Removal System - Media Changeoutannualized$400,000Non-Media Consumablesannualized$5,000Capstone Maintenance Plan$252,288General Maintenance - Parts and Labor2.5% of capital subtotal$117,475$774,763Capstone TurbinesAlternative 2b-1: Landfill Electricity Generation - MicroturbinesMicroturbinesCapital CostCapital Cost SubtotalTotal Adjusted Base Bid with InstallationAnnual O&M CostAnnual O&M Costs CostsEngine Generator Building $1,800,000Biogas Conditioning Syst. (H2S, Siloxanes, Moisture)MTU$1,848,000Engine GeneratorsMTU$2,718,720General Site/Civil Work$100,000Concrete Pad$50,000Interconnecting Piping$70,000Site Piping$50,000Electrical Equipment$1,450,000Instrumentation & Control Equipment$20,000$8,107,000Process Installation15% of subtotal $1,216,050Electrical Installation15% of subtotal $1,216,050Contractor Overhead and Profit15% of all capital $1,580,865Mobilization6% of all capital $727,198Bond, Insurance, Taxes3% of all capital $316,173Contingency30% of all capital$3,949,001Detailed Design and Construction Admin15% of all capital$2,566,851MidAmerican Energy Connection Fees$800,000$20,479,000Siloxane Removal System - Media Changeoutannualized$400,000Gas Conditioning System Electricity Costsannualized$125,268MTU Engine Generator Maintenance Plan$559,793General Maintenance - Parts and Labor2.5% of capital subtotal$202,675$1,287,736Engine GeneratorsMTUAlternative 2b-2: Landfill Electricity Generation - Engine GeneratorsCapital CostCapital Cost SubtotalTotal Adjusted Base Bid with InstallationAnnual O&M CostsAnnual O&M Cost CostsBlower Building $240,000H2S Removal SystemUnison$105,000Blower/Moisture RemovalUnison$350,000Siloxane RemovalUnison$165,000H2S System Heated EnclosureUnison$100,000Upgrading System (2-Pass)Unison$950,000Upgrading System (3-Pass)Unison$290,000Upgrading System Heated EnclosureUnison$165,000General Site/Civil Work$100,000Concrete Pad$50,000Interconnecting Piping$100,000Site Piping$75,000Electrical Equipment$474,000Instrumentation & Control Equipment$20,000$3,184,000Process Installation15% of subtotal $477,600Electrical Installation15% of subtotal $477,600Contractor Overhead and Profit15% of all capital $620,880Mobilization6% of all capital $285,605Bond, Insurance, Taxes3% of all capital $124,176Contingency30% of all capital$1,550,958Detailed Design and Construction Admin15% of all capital$1,008,123$7,729,000H2S Removal System - Media Changeoutannualized$27,010Siloxane Removal System - Media Changeoutannualized$635,000Gas Conditioning System Electricity Costsannualized$125,268General Maintenance - Parts and Labor2.5% of capital subtotal$79,600$866,878Capital CostCapital Cost SubtotalTotal Adjusted Base Bid with InstallationAnnual O&M CostAnnual O&M CostsAlternative 3: WWTP NG ReplacementUnison Solutions Equipment