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Home My WebLink AboutDAQ-2024-004990 DAQE-AN109460006-24 {{$d1 }} James Dixon Central Weber Sewer Improvement District 2618 West Pioneer Road Ogden, UT 84404 jamesd@centralweber.com Dear Mr. Dixon: Re: Approval Order: Modification of Approval Order DAQE-AN109460004-21 to Increase Digester Gas Production and Remove Generator Engines Project Number: N109460006 The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on October 27, 2023. Central Weber Sewer Improvement District must comply with the requirements of this AO, all applicable state requirements (R307), and Federal Standards. The project engineer for this action is Christine Bodell, who can be contacted at (385) 290-2690 or cbodell@utah.gov. Future correspondence on this AO should include the engineer's name as well as the DAQE number shown on the upper right-hand corner of this letter. No public comments were received on this action. Sincerely, {{$s }} Bryce C. Bird Director BCB:CB:jg cc: Weber-Morgan Health Department 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820 Telephone (801) 536-4000 • Fax (801) 536-4099 • T.D.D. (801) 536-4414 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director February 7, 2024 STATE OF UTAH Department of Environmental Quality Division of Air Quality {{#s=Sig_es_:signer1:signature}} {{#d1=date1_es_:signer1:date:format(date, "mmmm d, yyyy")}} {{#d2=date1_es_:signer1:date:format(date, "mmmm d, yyyy"):align(center)}} APPROVAL ORDER DAQE-AN109460006-24 Modification of Approval Order DAQE-AN109460004-21 to Increase Digester Gas Production and Remove Generator Engines Prepared By Christine Bodell, Engineer (385) 290-2690 cbodell@utah.gov Issued to Central Weber Sewer Improvement District - Wastewater Treatment Plant Issued On {{$d2 }} Issued By {{$s }} Bryce C. Bird Director Division of Air Quality February 7, 2024 TABLE OF CONTENTS TITLE/SIGNATURE PAGE ....................................................................................................... 1 GENERAL INFORMATION ...................................................................................................... 3 CONTACT/LOCATION INFORMATION ............................................................................... 3 SOURCE INFORMATION ........................................................................................................ 3 General Description ................................................................................................................ 3 NSR Classification .................................................................................................................. 3 Source Classification .............................................................................................................. 3 Applicable Federal Standards ................................................................................................. 3 Project Description.................................................................................................................. 4 SUMMARY OF EMISSIONS .................................................................................................... 4 SECTION I: GENERAL PROVISIONS .................................................................................... 4 SECTION II: PERMITTED EQUIPMENT .............................................................................. 5 SECTION II: SPECIAL PROVISIONS ..................................................................................... 6 PERMIT HISTORY ..................................................................................................................... 7 ACRONYMS ................................................................................................................................. 8 DAQE-AN109460006-24 Page 3 GENERAL INFORMATION CONTACT/LOCATION INFORMATION Owner Name Source Name Central Weber Sewer Improvement District Central Weber Sewer Improvement District - Wastewater Treatment Plant Mailing Address Physical Address 2618 West Pioneer Road 2618 West Pioneer Road Ogden, UT 84404 Ogden, UT 84404 Source Contact UTM Coordinates Name: James Dixon 412,680 m Easting Phone: (801) 731-3011 4,569,516 m Northing Email: jamesd@centralweber.com Datum NAD83 UTM Zone 12 SIC code 4952 (Sewerage Systems) SOURCE INFORMATION General Description Central Weber Sewer Improvement District treats wastewater and anaerobically digests the produced sludge. The facility operates several generators and boilers. Boilers are used to supply heat for the digesters and the buildings on site. Generators are used to provide power to critical equipment during emergencies when power from the utility provider is interrupted. Equipment is powered by diesel, natural gas, and digester gas. The facility is set up to allow for multiple operating configurations which are determined by weather, equipment, maintenance schedules, equipment failure, wastewater influent quality, and power availability. NSR Classification Minor Modification at Minor Source Source Classification Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA Weber County Airs Source Size: B Applicable Federal Standards NSPS (Part 60), A: General Provisions NSPS (Part 60), Dc: Standards of Performance for Small Industrial-Commercial-Institutional Steam Generating Units NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines DAQE-AN109460006-24 Page 4 MACT (Part 63), A: General Provisions MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines Project Description Central Weber Sewer Improvement District has requested the following changes to its current Approval Order: 1. Remove two (2) 525 kW, natural/digester gas-fired engine generators (listed as equipment ID II.A.2 in Approval Order DAQE-AN109460004-21), 2. Remove one (1) 60 kW, diesel-fired emergency generator engine (listed as equipment ID II.A.4 in Approval Order DAQE-AN109460004-21), and 3. Increase the maximum annual digester gas production from 74,000 Dekatherms (Dth) to 101,985 Dth. SUMMARY OF EMISSIONS The emissions listed below are an estimate of the total potential emissions from the source. Some rounding of emissions is possible. Criteria Pollutant Change (TPY) Total (TPY) CO2 Equivalent -7914 34890.00 Carbon Monoxide -41.76 22.71 Nitrogen Oxides -46.10 19.42 Particulate Matter - PM10 0.43 2.43 Particulate Matter - PM2.5 0.43 2.43 Sulfur Dioxide -1 0.73 Volatile Organic Compounds 1 8.60 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr) Acetaldehyde (CAS #75070) -886 0 Formaldehyde (CAS #50000) -5604 36 Generic HAPs (CAS #GHAPS) -828 12 Hexane (CAS #110543) -136 850 Methanol (CAS #67561) -264 0 Change (TPY) Total (TPY) Total HAPs -3.86 0.45 SECTION I: GENERAL PROVISIONS I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101] I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401] DAQE-AN109460006-24 Page 5 I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1] I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8] I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall, to the extent practicable, maintain and operate any equipment approved under this AO, including associated air pollution control equipment, in a manner consistent with good air pollution control practice for minimizing emissions. Determination of whether acceptable operating and maintenance procedures are being used will be based on information available to the Director which may include, but is not limited to, monitoring results, opacity observations, review of operating and maintenance procedures, and inspection of the source. All maintenance performed on equipment authorized by this AO shall be recorded. [R307-401-4] I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107] I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150] SECTION II: PERMITTED EQUIPMENT II.A THE APPROVED EQUIPMENT II.A.1 Central Weber Sewer Improvement District A wastewater treatment facility II.A.2 2000 kW Emergency Generator Engine Fuel: Diesel Manufacture Date: 2012 Location: Blower Building NSPS Applicability: 40 CFR 60 Subpart IIII NESHAP Applicability: 40 CFR 63 Subpart ZZZZ II.A.3 2250 kW (3280 hp) Emergency Generator Engine Fuel: Diesel Manufacture Date: 2020 Location: Blower Building NSPS Applicability: 40 CFR 60 Subpart IIII NESHAP Applicability: 40 CFR 63 Subpart ZZZZ DAQE-AN109460006-24 Page 6 II.A.4 Backup Boilers Quantity: Two (2) Maximum Heat Input Capacity: 5.2 MM/Btu/hr Fuel: Natural gas Location: Digester Building NSPS/NESHAP Applicability: None II.A.5 Boilers Quantity: Three (3) Maximum Heat Input Capacity: 12.5 MMBtu/hr each Control Technology: Low NOx burners Fuel: Natural gas Location: New Digester Control Building NSPS Applicability: 40 CFR 60 Subpart Dc II.A.6 Several Boilers/Furnaces/Heaters Fuel: Natural Gas Maximum heat input Capacity: Less than 5 MMBtu/hr each *Listed form informational purposes only II.A.7 Digester Gas Flare Smokeless type flare Location: Maintenance Building SECTION II: SPECIAL PROVISIONS II.B REQUIREMENTS AND LIMITATIONS II.B.1 Source-Wide Requirements II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to exceed the following values: A. All boiler exhaust stacks - 10% B. All diesel-fired emergency generator exhaust stacks - 20% C. All engine-generator sets exhaust - 10% D. Digester gas flare - 10% E. All other points - 20% [R307-201, R307-401-8] II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. Opacity observations of emissions from flares shall be conducted according to 40 CFR 60 Appendix A, Method 22. [R307-201] DAQE-AN109460006-24 Page 7 II.B.1.b The owner/operator shall continue with an annual service program for the gas system and carburetor system by a certified service representative. The exhaust emissions shall be checked once every 12 months and the carburetor system readjusted as required every 12 months. The system shall be readjusted any time the system is altered or repaired. Records of all adjustments shall be kept and made available to the Director for their inspection. [R307-401-8] II.B.1.c All emissions from the production of digester gas shall be routed through the digester gas flare before being vented to the atmosphere. [R307-401-8] II.B.2 Emergency Generator Requirements II.B.2.a The owner/operator shall only operate one (1) emergency engine at a time during non-emergency situations. [R307-401-8] II.B.2.b The owner/operator shall not operate each emergency engine on site for more than 100 hours per calendar year during non-emergency situations. There is no time limit on the use of the engines during emergencies. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.b.1 To determine compliance with a calendar year total, the owner/operator shall calculate a new yearly total by January 31st using data from the previous calendar year. Records documenting the operation of each emergency engine shall be kept in a log and shall include the following: A. The date the emergency engine was used B. The duration of operation in hours C. The reason for the emergency engine usage. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.b.2 To determine the duration of operation, the owner/operator shall install a non-resettable hour meter for each emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.c The owner/operator shall only use diesel fuel (fuel oil #1, #2 or diesel fuel oil additives) in the diesel-fired emergency engines. All diesel burned shall meet the definition of ultra-low sulfur diesel (ULSD) and contain no more than 15 ppm sulfur. [R307-401-8] II.B.2.c.1 To demonstrate compliance with the diesel fuel requirements for any diesel fuel purchased, the owner/operator shall keep and maintain fuel purchase invoices. The fuel purchase invoices shall indicate that the diesel fuel meets the ULSD requirements, or the owner/operator shall obtain certification of sulfur content from the fuel supplier. [R307-401-8] PERMIT HISTORY This Approval Order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN109460004-21 dated August 19, 2021 Is Derived From NOI dated October 27, 2023 DAQE-AN109460006-24 Page 8 ACRONYMS The following lists commonly used acronyms and associated translations as they apply to this document: 40 CFR Title 40 of the Code of Federal Regulations AO Approval Order BACT Best Available Control Technology CAA Clean Air Act CAAA Clean Air Act Amendments CDS Classification Data System (used by Environmental Protection Agency to classify sources by size/type) CEM Continuous emissions monitor CEMS Continuous emissions monitoring system CFR Code of Federal Regulations CMS Continuous monitoring system CO Carbon monoxide CO2 Carbon Dioxide CO2e Carbon Dioxide Equivalent - Title 40 of the Code of Federal Regulations Part 98, Subpart A, Table A-1 COM Continuous opacity monitor DAQ/UDAQ Division of Air Quality DAQE This is a document tracking code for internal Division of Air Quality use EPA Environmental Protection Agency FDCP Fugitive dust control plan GHG Greenhouse Gas(es) - Title 40 of the Code of Federal Regulations 52.21 (b)(49)(i) GWP Global Warming Potential - Title 40 of the Code of Federal Regulations Part 86.1818- 12(a) HAP or HAPs Hazardous air pollutant(s) ITA Intent to Approve LB/YR Pounds per year MACT Maximum Achievable Control Technology MMBTU Million British Thermal Units NAA Nonattainment Area NAAQS National Ambient Air Quality Standards NESHAP National Emission Standards for Hazardous Air Pollutants NOI Notice of Intent NOx Oxides of nitrogen NSPS New Source Performance Standard NSR New Source Review PM10 Particulate matter less than 10 microns in size PM2.5 Particulate matter less than 2.5 microns in size PSD Prevention of Significant Deterioration PTE Potential to Emit R307 Rules Series 307 R307-401 Rules Series 307 - Section 401 SO2 Sulfur dioxide Title IV Title IV of the Clean Air Act Title V Title V of the Clean Air Act TPY Tons per year UAC Utah Administrative Code VOC Volatile organic compounds DAQE-IN109460006-23 January 4, 2024 James Dixon Central Weber Sewer Improvement District 2618 West Pioneer Road Ogden, UT 84404 jamesd@centralweber.com Dear Mr. Dixon: Re: Intent to Approve: Modification of Approval Order DAQE-AN109460004-21 to Increase Digester Gas Production and Remove Generator Engines Project Number: N109460006 The attached document is the Intent to Approve (ITA) for the above-referenced project. The ITA is subject to public review. Any comments received shall be considered before an Approval Order (AO) is issued. The Division of Air Quality is authorized to charge a fee for reimbursement of the actual costs incurred in the issuance of an AO. An invoice will follow upon issuance of the final AO. Future correspondence on this ITA should include the engineer's name, Christine Bodell, as well as the DAQE number as shown on the upper right-hand corner of this letter. Christine Bodell, can be reached at (385) 290-2690 or cbodell@utah.gov, if you have any questions. Sincerely, {{$s }} Alan D. Humpherys, Manager New Source Review Section ADH:CB:jg cc: Weber-Morgan Health Department 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820 Telephone (801) 536-4000 • Fax (801) 536-4099 • T.D.D. (801) 536-4414 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director STATE OF UTAH Department of Environmental Quality Division of Air Quality INTENT TO APPROVE DAQE-IN109460006-23 Modification of Approval Order DAQE-AN109460004-21 to Increase Digester Gas Production and Remove Generator Engines Prepared By Christine Bodell, Engineer (385) 290-2690 cbodell@utah.gov Issued to Central Weber Sewer Improvement District - Wastewater Treatment Plant Issued On January 4, 2024 {{$s }} New Source Review Section Manager Alan D. Humpherys {{#s=Sig_es_:signer1:signature}} TABLE OF CONTENTS TITLE/SIGNATURE PAGE ....................................................................................................... 1 GENERAL INFORMATION ...................................................................................................... 3 CONTACT/LOCATION INFORMATION ............................................................................... 3 SOURCE INFORMATION ........................................................................................................ 3 General Description ................................................................................................................ 3 NSR Classification .................................................................................................................. 3 Source Classification .............................................................................................................. 3 Applicable Federal Standards ................................................................................................. 3 Project Description.................................................................................................................. 4 SUMMARY OF EMISSIONS .................................................................................................... 4 PUBLIC NOTICE STATEMENT............................................................................................... 5 SECTION I: GENERAL PROVISIONS .................................................................................... 5 SECTION II: PERMITTED EQUIPMENT .............................................................................. 6 SECTION II: SPECIAL PROVISIONS ..................................................................................... 7 PERMIT HISTORY ..................................................................................................................... 8 ACRONYMS ................................................................................................................................. 9 DAQE-IN109460006-23 Page 3 GENERAL INFORMATION CONTACT/LOCATION INFORMATION Owner Name Source Name Central Weber Sewer Improvement District Central Weber Sewer Improvement District - Wastewater Treatment Plant Mailing Address Physical Address 2618 West Pioneer Road 2618 West Pioneer Road Ogden, UT 84404 Ogden, UT 84404 Source Contact UTM Coordinates Name: James Dixon 412,680 m Easting Phone: (801) 731-3011 4,569,516 m Northing Email: jamesd@centralweber.com Datum NAD83 UTM Zone 12 SIC code 4952 (Sewerage Systems) SOURCE INFORMATION General Description Central Weber Sewer Improvement District treats wastewater and anaerobically digests the produced sludge. The facility operates several generators and boilers. Boilers are used to supply heat for the digesters and the buildings on site. Generators are used to provide power to critical equipment during emergencies when power from the utility provider is interrupted. Equipment is powered by diesel, natural gas, and digester gas. The facility is set up to allow for multiple operating configurations which are determined by weather, equipment, maintenance schedules, equipment failure, wastewater influent quality, and power availability. NSR Classification Minor Modification at Minor Source Source Classification Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA Weber County Airs Source Size: B Applicable Federal Standards NSPS (Part 60), A: General Provisions NSPS (Part 60), Dc: Standards of Performance for Small Industrial-Commercial-Institutional Steam Generating Units NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines MACT (Part 63), A: General Provisions DAQE-IN109460006-23 Page 4 MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines Project Description Central Weber Sewer Improvement District has requested the following changes to its current Approval Order: 1. Remove two (2) 525 kW, natural/digester gas-fired engine generators (listed as equipment ID II.A.2 in Approval Order DAQE-AN109460004-21), 2. Remove one (1) 60 kW, diesel-fired emergency generator engine (listed as equipment ID II.A.4 in Approval Order DAQE-AN109460004-21), and 3. Increase the maximum annual digester gas production from 74,000 Dekatherms (Dth) to 101,985 Dth. SUMMARY OF EMISSIONS The emissions listed below are an estimate of the total potential emissions from the source. Some rounding of emissions is possible. Criteria Pollutant Change (TPY) Total (TPY) CO2 Equivalent -7914 34890.00 Carbon Monoxide -41.76 22.71 Nitrogen Oxides -46.10 19.42 Particulate Matter - PM10 0.43 2.43 Particulate Matter - PM2.5 0.43 2.43 Sulfur Dioxide -1 0.73 Volatile Organic Compounds 1 8.60 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr) Acetaldehyde (CAS #75070) -886 0 Formaldehyde (CAS #50000) -5604 36 Generic HAPs (CAS #GHAPS) -828 12 Hexane (CAS #110543) -136 850 Methanol (CAS #67561) -264 0 Change (TPY) Total (TPY) Total HAPs -3.86 0.45 DAQE-IN109460006-23 Page 5 PUBLIC NOTICE STATEMENT The NOI for the above-referenced project has been evaluated and has been found to be consistent with the requirements of UAC R307. Air pollution producing sources and/or their air control facilities may not be constructed, installed, established, or modified prior to the issuance of an AO by the Director. A 30-day public comment period will be held in accordance with UAC R307-401-7. A notification of the intent to approve will be published in the Ogden Standard Examiner on January 5, 2024. During the public comment period the proposal and the evaluation of its impact on air quality will be available for the public to review and provide comment. If anyone so requests a public hearing within 15 days of publication, it will be held in accordance with UAC R307-401-7. The hearing will be held as close as practicable to the location of the source. Any comments received during the public comment period and the hearing will be evaluated. The proposed conditions of the AO may be changed as a result of the comments received. SECTION I: GENERAL PROVISIONS The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101] I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401] I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1] I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8] I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall, to the extent practicable, maintain and operate any equipment approved under this AO, including associated air pollution control equipment, in a manner consistent with good air pollution control practice for minimizing emissions. Determination of whether acceptable operating and maintenance procedures are being used will be based on information available to the Director which may include, but is not limited to, monitoring results, opacity observations, review of operating and maintenance procedures, and inspection of the source. All maintenance performed on equipment authorized by this AO shall be recorded. [R307-401-4] I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107] I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150] DAQE-IN109460006-23 Page 6 SECTION II: PERMITTED EQUIPMENT The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. II.A THE APPROVED EQUIPMENT II.A.1 Central Weber Sewer Improvement District A wastewater treatment facility II.A.2 2000 kW Emergency Generator Engine Fuel: Diesel Manufacture Date: 2012 Location: Blower Building NSPS Applicability: 40 CFR 60 Subpart IIII NESHAP Applicability: 40 CFR 63 Subpart ZZZZ II.A.3 2250 kW (3280 hp) Emergency Generator Engine Fuel: Diesel Manufacture Date: 2020 Location: Blower Building NSPS Applicability: 40 CFR 60 Subpart IIII NESHAP Applicability: 40 CFR 63 Subpart ZZZZ II.A.4 Backup Boilers Quantity: 2 Maximum Heat Input Capacity: 5.2 MM/Btu/hr Fuel: Natural gas Location: Digester Building NSPS/NESHAP Applicability: None II.A.5 Boilers Quantity: 3 Maximum Heat Input Capacity: 12.5 MMBtu/hr each Control Technology: Low NOx burners Fuel: Natural gas Location: New Digester Control Building NSPS Applicability: 40 CFR 60 Subpart Dc II.A.6 Several Boilers/Furnaces/Heaters Fuel: Natural Gas Maximum heat input Capacity: Less than 5 MMBtu/hr each *Listed form informational purposes only II.A.7 Digester Gas Flare Smokeless type flare Location: Maintenance Building DAQE-IN109460006-23 Page 7 SECTION II: SPECIAL PROVISIONS The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. II.B REQUIREMENTS AND LIMITATIONS II.B.1 Source-Wide Requirements II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to exceed the following values: A. All boiler exhaust stacks - 10% B. All diesel-fired emergency generator exhaust stacks - 20% C. All engine-generator sets exhaust - 10% D. Digester gas flare - 10% E. All other points - 20%. [R307-201, R307-401-8] II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. Opacity observations of emissions from flares shall be conducted according to 40 CFR 60 Appendix A, Method 22. [R307-201] II.B.1.b The owner/operator shall continue with an annual service program for the gas system and carburetor system by a certified service representative. The exhaust emissions shall be checked once every 12 months and the carburetor system readjusted as required every 12 months. The system shall be readjusted any time the system is altered or repaired. Records of all adjustments shall be kept and made available to the Director for their inspection. [R307-401-8] II.B.1.c All emissions from the production of digester gas shall be routed through the digester gas flare before being vented to the atmosphere. [R307-401-8] II.B.2 Emergency Generator Requirements II.B.2.a The owner/operator shall only operate one emergency engine at a time during non-emergency situations. [R307-401-8] II.B.2.b The owner/operator shall not operate each emergency engine on site for more than 100 hours per calendar year during non-emergency situations. There is no time limit on the use of the engines during emergencies. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.b.1 To determine compliance with a calendar year total, the owner/operator shall calculate a new yearly total by January 31st using data from the previous calendar year. Records documenting the operation of each emergency engine shall be kept in a log and shall include the following: A. The date the emergency engine was used B. The duration of operation in hours C. The reason for the emergency engine usage. [40 CFR 63 Subpart ZZZZ, R307-401-8] DAQE-IN109460006-23 Page 8 II.B.2.b.2 To determine the duration of operation, the owner/operator shall install a non-resettable hour meter for each emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.c The owner/operator shall only use diesel fuel (fuel oil #1, #2 or diesel fuel oil additives) in the diesel-fired emergency engines. All diesel burned shall meet the definition of ultra-low sulfur diesel (ULSD) and contain no more than 15 ppm sulfur. [R307-401-8] II.B.2.c.1 To demonstrate compliance with the diesel fuel requirements for any diesel fuel purchased, the owner/operator shall keep and maintain fuel purchase invoices. The fuel purchase invoices shall indicate that the diesel fuel meets the ULSD requirements, or the owner/operator shall obtain certification of sulfur content from the fuel supplier. [R307-401-8] PERMIT HISTORY This Approval Order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN109460004-21 dated August 19, 2021 Is Derived From NOI dated October 27, 2023 DAQE-IN109460006-23 Page 9 ACRONYMS The following lists commonly used acronyms and associated translations as they apply to this document: 40 CFR Title 40 of the Code of Federal Regulations AO Approval Order BACT Best Available Control Technology CAA Clean Air Act CAAA Clean Air Act Amendments CDS Classification Data System (used by Environmental Protection Agency to classify sources by size/type) CEM Continuous emissions monitor CEMS Continuous emissions monitoring system CFR Code of Federal Regulations CMS Continuous monitoring system CO Carbon monoxide CO2 Carbon Dioxide CO2e Carbon Dioxide Equivalent - Title 40 of the Code of Federal Regulations Part 98, Subpart A, Table A-1 COM Continuous opacity monitor DAQ/UDAQ Division of Air Quality DAQE This is a document tracking code for internal Division of Air Quality use EPA Environmental Protection Agency FDCP Fugitive dust control plan GHG Greenhouse Gas(es) - Title 40 of the Code of Federal Regulations 52.21 (b)(49)(i) GWP Global Warming Potential - Title 40 of the Code of Federal Regulations Part 86.1818- 12(a) HAP or HAPs Hazardous air pollutant(s) ITA Intent to Approve LB/YR Pounds per year MACT Maximum Achievable Control Technology MMBTU Million British Thermal Units NAA Nonattainment Area NAAQS National Ambient Air Quality Standards NESHAP National Emission Standards for Hazardous Air Pollutants NOI Notice of Intent NOx Oxides of nitrogen NSPS New Source Performance Standard NSR New Source Review PM10 Particulate matter less than 10 microns in size PM2.5 Particulate matter less than 2.5 microns in size PSD Prevention of Significant Deterioration PTE Potential to Emit R307 Rules Series 307 R307-401 Rules Series 307 - Section 401 SO2 Sulfur dioxide Title IV Title IV of the Clean Air Act Title V Title V of the Clean Air Act TPY Tons per year UAC Utah Administrative Code VOC Volatile organic compounds Central Weber Sewer District 10946 0006 - Page 1 of 1 [def:$signername|printname|req|signer1] [def:$signersig|sig|req|signer1] [def:$notarysig|sig|req|notary] [def:$date|date|req|notary] [def:$state|state|req|notary] [def:$county|county|req|notary] [def:$disclosure|disclosure|req|notary] [def:$seal|seal|req|notary] AFFIDAVIT OF PUBLICATION ACCOUNT #DESCRIPTION TIMES PROOF TOTAL CHARGES jqk4wTayhy9igUwuRoM7 1 .00 412.74 State of Texas, County of Ellis, ss: Ayesha Carletta M Cochran-Worthen, being first duly sworn, deposes and says: That (s)he is a duly authorized signatory of Column Software, PBC, duly authorized agent of Standard- Examiner, a newspaper printed and published in the City of Ogden, County of Weber, Davis, Box Elder and Morgan, State of Utah, and that this affidavit is Page 1 of 1 with the full text of the sworn-to notice set forth on the pages that follow, and the hereto attached. That said newspaper was regularly issued and circulated on those dates. Same was also published online at utahlegals.com, according to Section 45-1-101 -Utah Code Annotated, beginning on the first date of publication, for at least 30 days thereafter and a minimum of 30 days prior to the date of scheduled. PUBLICATION DATES: Jan. 5, 2024 NOTICE ID: jqk4wTayhy9igUwuRoM7 PUBLISHER ID: UC0085 NOTICE NAME: Central Weber Sewer District 10946 0006 Publication Fee: 412.74 [$signersig ] (Signed)______________________________________ [$seal] VERIFICATION State of Texas County of Ellis Subscribed in my presence and sworn to before me on this: [$date] [$notarysig ] ______________________________ Notary Public [$disclosure] Notarized online using audio-video communication 01/05/2024 DAQE-NN109460006-23 January 4, 2024 Ogden Standard Examiner Legal Advertising Dept. P.O. Box 12790332 Standard Way Ogden, UT 84412 RE: Legal Notice of Intent to Approve This letter will confirm the authorization to publish the attached NOTICE in the Ogden Standard Examiner (Account Number: 100331) on January 5, 2024. Please mail the invoice and affidavit of publication to the Utah State Department of Environmental Quality, Division of Air Quality, P.O. Box 144820, Salt Lake City, Utah 84114-4820. If you have any questions, contact Jeree Greenwood, who may be reached at (385)306-6514. Sincerely, {{$s }} Jeree Greenwood Office Technician Enclosure cc: Wasatch Front Regional Council cc: Weber County 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820 Telephone (801) 536-4000 • Fax (801) 536-4099 • T.D.D. (801) 903-3978 www.deq.utah.gov Printed on 100% recycled paper State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director DAQE-NN109460006-23 Page 2 NOTICE A Notice of Intent for the following project submitted in accordance with R307-401-1, Utah Administrative Code (UAC), has been received for consideration by the Director: Company Name: Central Weber Sewer Improvement District Location: Central Weber Sewer Improvement District - Wastewater Treatment Plant – 2618 West Pioneer Road, Ogden, UT Project Description: Central Weber Sewer Improvement District treats wastewater and anaerobically digests the produced sludge. The facility operates several generators and boilers. Boilers are used to supply heat for the digesters and the buildings on site. Generators are used to provide power to critical equipment during emergencies when power from the utility provider is interrupted. Equipment is powered by diesel, natural gas, and digester gas. The facility is set up to allow for multiple operating configurations which are determined by weather, equipment, maintenance schedules, equipment failure, wastewater influent quality, and power availability. Central Weber Sewer Improvement District has requested the following changes to its current Approval Order: 1. Remove two (2) 525 kW, natural/digester gas-fired engine generators (listed as equipment ID II.A.2 in Approval Order DAQE-AN109460004-21), 2. Remove one (1) 60 kW, diesel-fired emergency generator engine (listed as equipment ID II.A.4 in Approval Order DAQE-AN109460004-21), and 3. Increase the maximum annual digester gas production from 74,000 Dekatherms (Dth) to 101,985 Dth. The completed engineering evaluation and air quality impact analysis showed the proposed project meets the requirements of federal air quality regulations and the State air quality rules. The Director intends to issue an Approval Order pending a 30-day public comment period. The project proposal, estimate of the effect on local air quality and draft Approval Order are available for public inspection and comment at the Utah Division of Air Quality, 195 North 1950 West, Salt Lake City, UT 84116. Written comments received by the Division at this same address on or before February 4, 2024 will be considered in making the final decision on the approval/disapproval of the proposed project. Email comments will also be accepted at cbodell@utah.gov. If anyone so requests to the Director in writing within 15 days of publication of this notice, a hearing will be held in accordance with R307-401-7, UAC. Under Section 19-1-301.5, a person who wishes to challenge a Permit Order may only raise an issue or argument during an adjudicatory proceeding that was raised during the public comment period and was supported with sufficient information or documentation to enable the Director to fully consider the substance and significance of the issue. Date of Notice: January 5, 2024 {{#s=Sig_es_:signer1:signature}} DAQE- RN109460006 December 11, 2023 James Dixon Central Weber Sewer Improvement District 2618 West Pioneer Road Ogden, UT 84404 jamesd@centralweber.com Dear James Dixon, Re: Engineer Review: Modification of Approval Order DAQE-AN109460004-21 to Increase Digester Gas Production and Remove Generator Engines Project Number: N109460006 The DAQ requests a company representative review and sign the attached Engineer Review (ER). This ER identifies all applicable elements of the New Source Review permitting program. Central Weber Sewer Improvement District should complete this review within 10 business days of receipt. Central Weber Sewer Improvement District should contact Christine Bodell at (385) 290-2690 if there are questions or concerns with the review of the draft permit conditions. Upon resolution of your concerns, please email Christine Bodell at cbodell@utah.gov the signed cover letter. Upon receipt of the signed cover letter, the DAQ will prepare an ITA for a 30-day public comment period. At the completion of the comment period, the DAQ will address any comments and will prepare an Approval Order (AO) for signature by the DAQ Director. If Central Weber Sewer Improvement District does not respond to this letter within 10 business days, the project will move forward without source concurrence. If Central Weber Sewer Improvement District has concerns that cannot be resolved and the project becomes stagnant, the DAQ Director may issue an Order prohibiting construction. Approval Signature _____________________________________________________________ (Signature & Date) 195 North 1950 West • Salt Lake City, UT Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820 Telephone (801) 536-4000 • Fax (801) 536-4099 • T.D.D. (801) 903-3978 www.deq.utah.gov Printed on 100% recycled paper Department of Environmental Quality Kimberly D. Shelley Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director State of Utah SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 1 UTAH DIVISION OF AIR QUALITY ENGINEER REVIEW SOURCE INFORMATION Project Number N109460006 Owner Name Central Weber Sewer Improvement District Mailing Address 2618 West Pioneer Road Ogden, UT, 84404 Source Name Central Weber Sewer Improvement District- Wastewater Treatment Plant Source Location 2618 West Pioneer Road Ogden, UT 84404 UTM Projection 412,680 m Easting, 4,569,516 m Northing UTM Datum NAD83 UTM Zone UTM Zone 12 SIC Code 4952 (Sewerage Systems) Source Contact James Dixon Phone Number (801) 731-3011 Email jamesd@centralweber.com Billing Contact James Dixon Phone Number 801-731-3011 Email jamesd@centralweber.com Project Engineer Christine Bodell, Engineer Phone Number (385) 290-2690 Email cbodell@utah.gov Notice of Intent (NOI) Submitted October 27, 2023 Date of Accepted Application November 20, 2023 Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 2 SOURCE DESCRIPTION General Description Central Weber Sewer Improvement District treats wastewater and anaerobically digests the produced sludge. The facility operates several generators and boilers. Boilers are used to supply heat for the digesters and the buildings on site. Generators are used to provide power to critical equipment during emergencies when power from the utility provider is interrupted. Equipment is powered by diesel, natural gas, and digester gas. The facility is set up to allow for multiple operating configurations which are determined by weather, equipment, maintenance schedules, equipment failure, wastewater influent quality, and power availability. NSR Classification: Minor Modification at Minor Source Source Classification Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA Weber County Airs Source Size: B Applicable Federal Standards NSPS (Part 60), A: General Provisions NSPS (Part 60), Dc: Standards of Performance for Small Industrial-Commercial-Institutional Steam Generating Units NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines MACT (Part 63), A: General Provisions MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines Project Proposal Modification of Approval Order DAQE-AN109460004-21 to Increase Digester Gas Production and Remove Generator Engines Project Description Central Weber Sewer Improvement District has requested the following changes to its current Approval Order: 1. Remove two (2) 525 kW, natural/digester gas-fired engine generators (listed as equipment ID II.A.2 in Approval Order DAQE-AN109460004-21), 2. Remove one (1) 60 kW, diesel-fired emergency generator engine (listed as equipment ID II.A.4 in Approval Order DAQE-AN109460004-21), and 3. Increase the maximum annual digester gas production from 74,000 Dekatherms (Dth) to 101,985 Dth. EMISSION IMPACT ANALYSIS The criteria and HAPs emission increases do not exceed any thresholds outlined in UAC Rule R307-410. Therefore, modeling is not required at this time. [Last updated November 16, 2023] Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 3 SUMMARY OF EMISSIONS The emissions listed below are an estimate of the total potential emissions from the source. Some rounding of emissions is possible. Criteria Pollutant Change (TPY) Total (TPY) CO2 Equivalent -7914 34890.00 Carbon Monoxide -41.76 22.71 Nitrogen Oxides -46.10 19.42 Particulate Matter - PM10 0.43 2.43 Particulate Matter - PM2.5 0.43 2.43 Sulfur Dioxide -1 0.73 Volatile Organic Compounds 1 8.60 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr) Acetaldehyde (CAS #75070) -886 0 Formaldehyde (CAS #50000) -5604 36 Generic HAPs (CAS #GHAPS) -828 12 Hexane (CAS #110543) -136 850 Methanol (CAS #67561) -264 0 Change (TPY) Total (TPY) Total HAPs -3.86 0.45 Note: Change in emissions indicates the difference between previous AO and proposed modification. Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 4 Review of BACT for New/Modified Emission Units 1. BACT review regarding Increase in Digester Gas Production The source is increasing digester gas production from 74,000 Dth/yr to 101,895 Dth/yr. The primary pollutants associated with increased digester gas production are VOCs. Flares are used to control VOCs for this type of application and have a typical control efficiency of 97.7%. To reduce VOC emissions, the source will capture all produced digester gas and combust it using a flare prior to releasing it to the atmosphere. This is considered BACT. [Last updated December 6, 2023] SECTION I: GENERAL PROVISIONS The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101] I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401] I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1] I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8] I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall, to the extent practicable, maintain and operate any equipment approved under this AO, including associated air pollution control equipment, in a manner consistent with good air pollution control practice for minimizing emissions. Determination of whether acceptable operating and maintenance procedures are being used will be based on information available to the Director which may include, but is not limited to, monitoring results, opacity observations, review of operating and maintenance procedures, and inspection of the source. All maintenance performed on equipment authorized by this AO shall be recorded. [R307- 401-4] I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107] I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307- 150] Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 5 SECTION II: PERMITTED EQUIPMENT The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): II.A THE APPROVED EQUIPMENT II.A.1 Central Weber Sewer Improvement District A wastewater treatment facility II.A.2 2000 kW Emergency Generator Engine Fuel: Diesel Manufacture Date: 2012 Location: Blower Building NSPS Applicability: 40 CFR 60 Subpart IIII NESHAP Applicability: 40 CFR 63 Subpart ZZZZ II.A.3 2250 kW (3280 hp) Emergency Generator Engine Fuel: Diesel Manufacture Date: 2020 Location: Blower Building NSPS Applicability: 40 CFR 60 Subpart IIII NESHAP Applicability: 40 CFR 63 Subpart ZZZZ II.A.4 Backup Boilers Quantity: 2 Maximum Heat Input Capacity: 5.2 MM/Btu/hr Fuel: Natural gas Location: Digester Building NSPS/NESHAP Applicability: None II.A.5 Boilers Quantity: 3 Maximum Heat Input Capacity: 12.5 MMBtu/hr each Control Technology: Low NOx burners Fuel: Natural gas Location: New Digester Control Building NSPS Applicability: 40 CFR 60 Subpart Dc II.A.6 Several Boilers/Furnaces/Heaters Fuel: Natural Gas Maximum heat input Capacity: Less than 5 MMBtu/hr each *Listed form informational purposes only Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 6 II.A.7 Digester Gas Flare Smokeless type flare Location: Maintenance Building SECTION II: SPECIAL PROVISIONS The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): II.B REQUIREMENTS AND LIMITATIONS II.B.1 Source-Wide Requirements II.B.1.a NEW The owner/operator shall not allow visible emissions from the following emission points to exceed the following values: A. All boiler exhaust stacks - 10% B. All diesel-fired emergency generator exhaust stacks - 20% C. All engine-generator sets exhaust - 10% D. Digester gas flare - 10% E. All other points - 20% . [R307-201, R307-401-8] II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. Opacity observations of emissions from flares shall be conducted according to 40 CFR 60 Appendix A, Method 22. [R307-201] II.B.1.b NEW The owner/operator shall continue with an annual service program for the gas system and carburetor system by a certified service representative. The exhaust emissions shall be checked once every 12 months and the carburetor system readjusted as required every 12 months. The system shall be readjusted any time the system is altered or repaired. Records of all adjustments shall be kept and made available to the Director for their inspection. [R307- 401-8] II.B.1.c NEW All emissions from the production of digester gas shall be routed through the digester gas flare before being vented to the atmosphere. [R307-401-8] II.B.2 Emergency Generator Requirements II.B.2.a NEW The owner/operator shall only operate one emergency engine at a time during non-emergency situations. [R307-401-8] Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 7 II.B.2.b NEW The owner/operator shall not operate each emergency engine on site for more than 100 hours per calendar year during non-emergency situations. There is no time limit on the use of the engines during emergencies. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.b.1 NEW To determine compliance with a calendar year total, the owner/operator shall calculate a new yearly total by January 31st using data from the previous calendar year. Records documenting the operation of each emergency engine shall be kept in a log and shall include the following: A. The date the emergency engine was used B. The duration of operation in hours C. The reason for the emergency engine usage . [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.b.2 NEW To determine the duration of operation, the owner/operator shall install a non-resettable hour meter for each emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.2.c NEW The owner/operator shall only use diesel fuel (fuel oil #1, #2 or diesel fuel oil additives) in the diesel-fired emergency engines. All diesel burned shall meet the definition of ultra-low sulfur diesel (ULSD) and contain no more than 15 ppm sulfur. [R307-401-8] II.B.2.c.1 NEW To demonstrate compliance with the diesel fuel requirements for any diesel fuel purchased, the owner/operator shall keep and maintain fuel purchase invoices. The fuel purchase invoices shall indicate that the diesel fuel meets the ULSD requirements, or the owner/operator shall obtain certification of sulfur content from the fuel supplier. [R307-401-8] Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 8 PERMIT HISTORY When issued, the approval order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN109460004-21 dated August 19, 2021 Is Derived From NOI dated October 27, 2023 REVIEWER COMMENTS 1. Comment regarding Source Emission Estimates and DAQ Acceptance: The source is removing three (3) engines and increasing digester gas production. These changes will result in a net decrease in NOx, CO, SO2, HAPs, and CO2e emissions and a net increase in PM10, PM2.5, and VOC emissions. Flare The VOC emission factor was taken from AP-42 Tables 13.5-1 for Industrial Flares. CO, NOx, and PM10/PM2.5 emission factors were taken from AP-42 Table 2.4-4 for Municipal Solid Waste Landfills with flare control. The emission factor for SO2 assumed a concentration of 150 ppm of H2S in the gas stream and is equivalent to 0.0114 lbs of SO2 per Dth. Emergency Engines Each emergency engine is fueled by diesel. Emission factors were obtained from AP-42 Section 3.4 for Large Stationary Diesel and All Stationary Dual-fuel Engines. The 2,250 kW (3,280 hp) emergency generator engine (Equipment ID# II.A.3) is de-rated to 2,000 kW. Boilers/Heaters Emissions from the natural gas-fired boilers/heaters were calculated using emission factors from AP- 42 Section 1.4 for Natural Gas Combustion. All boilers/heaters are assumed to run 8,760 hours annually. [Last updated December 6, 2023] 2. Comment regarding NSPS and MACT Applicability: 40 CFR 60 Subpart Dc (Standards of Performance for Small Industrial-Commercial-Institutional Steam Generating Units) The provisions of this subpart apply to owners and operators of steam generating units which commenced after June 9, 1989, rated above 10 MMBtu.hr. Steam generating unit means a device that combusts any fuel and produces steam or heats water or heats any heat transfer medium. Three (3) 12.5 MMBtu/hr boilers are subject to the recordkeeping and reporting requirements of Subpart Dc. 40 CFR 60 NSPS Subpart IIII - Standards of Performance or Stationary Compression Ignition Internal Combustion Engines The provisions of this subpart apply to owners and operators of stationary CI ICE that commence construction after July 11, 2005, where the stationary CI ICE are manufactured after April 1, 2006. The two (2) diesel-fired emergency stationary engines at this facility were constructed after this date and are therefore subject to NSPS Subpart IIII. 40 CFR 63 Subpart ZZZZ - Standards of Performance for Stationary Spark Ignition Internal Combustion Engines The provisions of this subpart are applicable to owners/operators of stationary RICE at a major or Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 9 area sources of HAP emissions. The facility includes (2) diesel-fired emergency stationary engines. The provisions of MACT Subpart ZZZZ apply as the stationary reciprocating internal combustion engine (RICE) is at an area source of HAP emissions. The engines are not designated as nonroad and are not exempt are affected sources under this regulation. Therefore, MACT Subpart ZZZZ applies to this facility. [Last updated November 16, 2023] 3. Comment regarding Title V Applicability: Title V of the 1990 Clean Air Act (Title V) applies to the following: 1. Any major source 2. Any source subject to a standard, limitation, or other requirement under Section 111 of the Act, Standards of Performance for New Stationary Sources; 3. Any source subject to a standard or other requirement under Section 112 of the Act, Hazardous Air Pollutants. 4. Any Title IV affected source. This facility is not a major source and is not a Title IV source. The facility is not subject to 40 CFR 61 (NESHAP) regulations. The facility is subject to 40 CFR 60 (NSPS) and 40 CFR 63 (MACT) regulations. The facility is subject to the provisions of NSPS Subparts Dc and IIII, and MACT Subpart ZZZZ. NSPS Subpart IIII and MACT Subpart ZZZZ each exempt sources from the obligation to obtain a permit under 40 CFR part 70 (Title V permit) if the source is not otherwise required by law to obtain a permit. NSPS Subpart Dc does not include this exemption. However, the facility is only subject to record-keeping requirements under NSPS Subpart Dc, and is not subject to a standard or limitation. Therefore, this facility is not a Title V source. [Last updated November 16, 2023] Engineer Review N109460006: Central Weber Sewer Improvement District- Wastewater Treatment Plant December 11, 2023 Page 10 ACRONYMS The following lists commonly used acronyms and associated translations as they apply to this document: 40 CFR Title 40 of the Code of Federal Regulations AO Approval Order BACT Best Available Control Technology CAA Clean Air Act CAAA Clean Air Act Amendments CDS Classification Data System (used by EPA to classify sources by size/type) CEM Continuous emissions monitor CEMS Continuous emissions monitoring system CFR Code of Federal Regulations CMS Continuous monitoring system CO Carbon monoxide CO2 Carbon Dioxide CO2e Carbon Dioxide Equivalent - 40 CFR Part 98, Subpart A, Table A-1 COM Continuous opacity monitor DAQ/UDAQ Division of Air Quality DAQE This is a document tracking code for internal UDAQ use EPA Environmental Protection Agency FDCP Fugitive dust control plan GHG Greenhouse Gas(es) - 40 CFR 52.21 (b)(49)(i) GWP Global Warming Potential - 40 CFR Part 86.1818-12(a) HAP or HAPs Hazardous air pollutant(s) ITA Intent to Approve LB/HR Pounds per hour LB/YR Pounds per year MACT Maximum Achievable Control Technology MMBTU Million British Thermal Units NAA Nonattainment Area NAAQS National Ambient Air Quality Standards NESHAP National Emission Standards for Hazardous Air Pollutants NOI Notice of Intent NOx Oxides of nitrogen NSPS New Source Performance Standard NSR New Source Review PM10 Particulate matter less than 10 microns in size PM2.5 Particulate matter less than 2.5 microns in size PSD Prevention of Significant Deterioration PTE Potential to Emit R307 Rules Series 307 R307-401 Rules Series 307 - Section 401 SO2 Sulfur dioxide Title IV Title IV of the Clean Air Act Title V Title V of the Clean Air Act TPY Tons per year UAC Utah Administrative Code VOC Volatile organic compounds Equipment Details Rating 55 MMBtu/hour 3 Bryan Boilers 12.5 MMBtu/hr Operational Hours 8,760 hours/year 2 Bryan Boilers 5.20 MMBtu/hr Firing Normal 1 Comfort Heater 7.12 MMBtu/hr Criteria Pollutant Concentration (ppm) Emission Factor (lb/10^6 scf) Emission Rate (lbs/hr) Emission Total (tons/year)Reference NOX 50 2.70 11.81 CO 84 4.53 19.85 PM10 7.6 0.41 1.80 PM2.5 7.6 0.41 1.80 SO2 0.6 0.03 0.14 VOC 5.5 0.30 1.30 Lead 0.0005 0.00 0.00 HAP 0.10 0.45 See Below Green House Gas Pollutant Global Warming Potential Emission Factor (lb/10^6 scf) Emission Rate (lbs/hr) Emission Total (tons/year)Reference CO2 (mass basis)1 120,000 6,473 28,351 Methane (mass basis)25 2.3 0.12 0.54N2O (mass basis)298 2.2 0.12 0.52 CO2e 28,520 Hazardous Air Pollutant Emission Rate (lbs/hr) Emission Total (tons/year)Reference 2-Methylnaphthalene 2.40E-05 1.29E-06 5.67E-06 3-Methylchloranthrene 1.80E-06 9.71E-08 4.25E-07 7,12-Dimethylbenz(a)anthracene 1.60E-05 8.63E-07 3.78E-06 Acenaphthene 1.80E-06 9.71E-08 4.25E-07 Acenaphthylene 1.80E-06 9.71E-08 4.25E-07 Anthracene 2.40E-06 1.29E-07 5.67E-07 Benz(a)anthracene 1.80E-06 9.71E-08 4.25E-07 Benzene 2.10E-03 1.13E-04 4.96E-04 Benzo(a)pyrene 1.20E-06 6.47E-08 2.84E-07 Benzo(b)fluoranthene 1.80E-06 9.71E-08 4.25E-07 Benzo(g,h,i)perylene 1.20E-06 6.47E-08 2.84E-07 Benzo(k)fluoranthene 1.80E-06 9.71E-08 4.25E-07 Chrysene 1.80E-06 9.71E-08 4.25E-07 Dibenzo(a,h)anthracene 1.20E-06 6.47E-08 2.84E-07 Dichlorobenzene 1.20E-03 6.47E-05 2.84E-04 Fluoranthene 3.00E-06 1.62E-07 7.09E-07 Fluorene 2.80E-06 1.51E-07 6.62E-07 Formaldehyde 7.50E-02 4.05E-03 1.77E-02 Hexane 1.80E+00 9.71E-02 4.25E-01 Indeno(1,2,3-cd)pyrene 1.80E-06 9.71E-08 4.25E-07 Naphthalene 6.10E-04 3.29E-05 1.44E-04 Phenanathrene 1.70E-05 9.17E-07 4.02E-06 Pyrene 5.00E-06 2.70E-07 1.18E-06 Toluene 3.40E-03 1.83E-04 8.03E-04 Arsenic 2.00E-04 1.08E-05 4.73E-05 Beryllium 1.20E-05 6.47E-07 2.84E-06 Cadmium 1.10E-03 5.93E-05 2.60E-04 Chromium 1.40E-03 7.55E-05 3.31E-04 Cobalt 8.40E-05 4.53E-06 1.98E-05 Manganese 3.80E-04 2.05E-05 8.98E-05 Mercury 2.60E-04 1.40E-05 6.14E-05 Nickel 2.10E-03 1.13E-04 4.96E-04 Selenium 2.40E-05 1.29E-06 5.67E-06 AP-42 Table 1.4-3 AP-42 Table 1.4-4 Natural Gas-Fired Boilers & Heaters Manufacturer Data or AP-42 Table 1.4-1 AP-42 Table 1.4-2 AP-42 Table 1.4-2 & Table A-1 to Subpart A of Part 98 Emission Factor (lb/10^6 scf) Page 1 of Version 1.0 November 29, 2018 Flow Rate 191 SCFM Operational Hous 8760 Hrs Fuel Usage 101,895 Dth Expected CH4 Content 60%% Pollutant Emission Factor Source Hourly CO 46 EPA2.4_2008 Draft, Table 2.4-4 0.316296 NOx 39 EPA2.4_2008 Draft, Table 2.4-4 0.268164 PM2.5/10 15 EPA2.4_2008 Draft, Table 2.4-4 0.10314 1 MMBtu = 1 Dth Pollutant Emission Factor Source Hourly SO2 0.0114 Previous NOI (assumes 150 ppm H2S)0.13 VOCs 0.14 Previous NOI (taken from AP 42 Table 13.5 - 1.63 Green House Gas Pollutant Global Warming Potential Emission Factor (lb/10^6 scf) Emission RateCO2 (mass basis)1 120000 1,375 Methane (mass basis)25 2.3 0 N2O (mass basis)298 2.2 0 CO2e Equipment Details ***gas production increased from 74,000 Dth/yr to 101,895 Dth/yr **for submission, see pages 266-277 of https://acrobat.adobe.com/link/review?uri=urn%3Aaaid%3Ascds%3AUS%3A1956947b-35c7-4ff3-9019-7a Annual 1.39 1.17 0.45 Annual 0.58 7.13 Emission Total Reference 6,023 0.12 0.11 6,059 AP-42 Table 1.4-2 & Table A-1 to Subpart A of Part 98 Equipment Details **Equipment II.A.2 (2000 kW) and Equipment II.A.5 (2,250 kW Rating 5,360 hp = (4000 kw) Operational Hours 100 hours/year Sulfur Content 15 ppm or 0.0015% Criteria Pollutant Emission Standards (g/hp-hr) Emission Factor (lb/hp-hr) Emission Rate (lbs/hr) Emission Total (tons/yea Reference NOX 0.024 128.64 6.43 CO 5.50E-03 29.48 1.47 PM10 7.00E-04 3.75 0.19 PM2.5 7.00E-04 3.75 0.19 VOC 6.42E-04 3.44 0.17 SO2 1.21E-05 0.07 0.00 AP-42 Table 3.4-1 HAP 0.06 0.00 See Below Pollutant Potential (lb/hp-hr)Rate Total Reference CO2 (mass basis)1 1.16 6,218 311 Methane (mass basis)25 6.35E-05 0 0 CO2e 311 Hazardous Air Pollutant Rate Total Reference Benzene 7.76E-04 2.91E-02 1.46E-03 Toluene 2.81E-04 1.05E-02 5.27E-04 Xylenes 1.93E-04 7.24E-03 3.62E-04 Formaldehyde 7.89E-05 2.96E-03 1.48E-04 Acetaldehyde 2.52E-05 9.46E-04 4.73E-05 Acrolein 7.88E-06 2.96E-04 1.48E-05 Naphthalene 1.30E-04 4.88E-03 2.44E-04 Acenaphthylene 9.23E-06 3.46E-04 1.73E-05 Acenaphthene 4.68E-06 1.76E-04 8.78E-06 Fluorene 1.28E-05 4.80E-04 2.40E-05 AP-42 Table 3.3-2, Table 3.4-3, & Table 3.4-4 Diesel-Fired Engines Emergency Engines should equal 100 hours of operation per year Manufacturer Data, AP-42 Table 3.3-1, & Table 3.4-1 AP-42 Table 3.3-1 & Table 3.4-1 (lb/MMBtu) Phenanthrene 4.08E-05 1.53E-03 7.65E-05 Anthracene 1.23E-06 4.61E-05 2.31E-06 Fluoranthene 4.03E-06 1.51E-04 7.56E-06 Pyrene 3.71E-06 1.39E-04 6.96E-06 Benz(a)anthracene 6.22E-07 2.33E-05 1.17E-06 Chrysene 1.53E-06 5.74E-05 2.87E-06 Benzo(b)fluoranthene 1.11E-06 4.16E-05 2.08E-06 Benzo(k)fluoranthene 2.18E-07 8.18E-06 4.09E-07 Benzo(a)pyrene 2.57E-07 9.64E-06 4.82E-07 Indeno(1,2,3-cd)pyrene 4.14E-07 1.55E-05 7.77E-07 Dibenz(a,h)anthracene 3.46E-07 1.30E-05 6.49E-07 Benzo(g,h,l)perylene 5.56E-07 2.09E-05 1.04E-06 (1,3-Butadiene will not popluate if the engine size is greater than 600 hp. AP-42 does not list 1,3-Butadiene for engines greater than 600 hp.) PM2.5 2 2.43 0.43 PM10 2 2.43 0.43 SO2 1.73 0.73 -1.00 NOx 65.52 19.42 -46.10 CO 64.47 22.71 -41.76 VOC 7.6 8.60 1.00 HAPs 4.31 0.45 -3.86 Acetaldehyde 0.443 4.73E-05 -0.44 Formaldehyde 2.82 1.79E-02 -2.80 Hexane 0.493 4.25E-01 -0.07 Methanol 0.132 #######-0.132 Generic HAPs 0.42 5.94E-03 -0.41 CO2e 42,804 34,890 -7913.56 *DAQE-AN109460004-21 Pollutant Current PTE Emissions (*) Updated Emissions Δ Increase Increase Reduction *increases are due to 40% increase in flared biogas production Reduction Reduction Increase Reduction Reduction Page 1 of 1 Form 4 Company____________________________ Project Information Site ______________________________ Utah Division of Air Quality New Source Review Section Process Data -For Modification/Amendment ONLY 1. Permit Number_______________________________ If submitting a new permit, then use Form 3 Requested Changes 2. Name of process to be modified/added: _______________________________ End product of this process: _______________________________ 3. Permit Change Type: New Increase* 4. Does new emission unit affect existing permitted process limits? Yes No 6. Description of Permit/Process Change** 7. New or modified materials and quantities used in process. ** Material Quantity Annually 8. New or modified process emitting units ** Emitting Unit(s)Capacity(s)Manufacture Date(s) *If the permit being modified does not include CO2e or PM2.5, the emissions need to be calculated and submitted to DAQ, which may result in an emissions increase and a public comment period. **If additional space is required, please generate a document to accommodate and attach to form. Central Weber Sewer Improvement District 10946 DAQE-AN0109460003-11 Wastewater Treatment Water treated to UDWQ requirements Equipment Process Condition Change: Removal of lean-burn engines Other ______________________________ Other ______________________________ Other ______________________________ 5.Condition(s) Changing: Reduction of emissions Removal of lean-burn engines and updates to run hours for other existing equipment. Removal of Lean-Burn Engines 525 kW 2001 ✔ Page 1 of 1 Company___________________________ 6LWH_____________________________ Form Emissions Information Criteria/GHGs/ HAP’s Utah Division of Air Quality New Source Review Section Potential to Emit* Criteria Pollutants & GHGs Criteria Pollutants Permitted Emissions (tons/yr) Emissions Increases (tons/yr) Proposed Emissions (tons/yr) PM10 Total PM10 Fugitive PM2.5 NOx SO2 CO VOC VOC Fugitive NH3 Greenhouse Gases CO2e CO2e CO2e CO2 CH4 N2O HFCs PFCs SF6 Total CO2e *Potential to emit to include pollution control equipment as defined by R307-401-2. Hazardous Air Pollutants**(**Defined in Section 112(b) of the Clean Air Act ) Hazardous Air Pollutant*** Permitted Emissions (tons/yr) Emission Increase (tons/yr) Proposed Emission (tons/yr) Emission Increase (lbs/hr) Total HAP *** Use additional sheets for pollutants if needed Central Weber Sewer Improvement District 10946 2.00 -0.1 1.9 2.00 -0.1 1.9 65.52 -39.33 26.19 1.73 -1.01 0.72 64.47 -23.98 40.49 7.60 0.83 8.43 Acetaldehyde (CAS #75070) 2.82 42,804.00 - - - - - - - - - - - - - - - - - Formaldehyde (CAS #50000) Generic HAPs (CAS #GHAPS) Hexane (CAS #110543) Methanol (CAS #67561) 0.44 0.42 0.49 0.13 4.31 -14,104.32 - - - - - -0.95 - - - - - 3.36 - - - - - - - 28,699.68 Potential Emission Calculations Central Weber Sewer Improvement District - Ogden Utah Name and Description of Source Existing Cumulative Natural Gas Fired Boilers and Smaller Space Heating Units, Combined. 3 Bryan Boilers 12.5 MMBtu/8760 HR/YR 328,500.00 MMBtu/YR 2 Bryan Boilers 5.20 MMBtu/8760 HR/YR 91,104.00 MMBtu/YR 1 Comfort Heater 7.12 MMBtu/8760 HR/YR 62,371.20 MMBtu/YR Estimated Annual Emissions from this Source Estimated maximum annual natural gas input to this facility 481,975 MMBtu/YR (85 - 90,000 Dth x 10**3 SCF/year max. to start, load growth anticipated over time.) Maximum may be reduced by a contribution from the engine generator reject heat, up to 10 - 15,000 Dth/year. Pollutant Calculation Source Dth/year x EPA Factor = xxxx lbs/year ======================= xxxx tons /year Criteria Pollutants EPA Emissions Factor x Ann Fuel Use Yields (lb/10**6 SCF) MMBtu/YR Lbs/Year Tons/Year CO2 120,000.00 x 481,975 = 56,702,965 28351.48 CO 84.00 481,975 39,692.08 19.85 Lead 0.0005 x 481,975 = 0.24 0.00 NOx 50.00 x 481,975 = 23,626.24 11.81 N2O Controlled 0.64 x 481,975 = 302.42 0.15 PM Total 7.60 x 481,975 = 3,591.19 1.80 SO2 0.60 x 481,975 = 283.51 0.14 TOC 11.00 x 481,975 = 5,197.77 2.60 Methane (CH4) 2.30 x 481,975 = 1,086.81 0.54 VOC 5.50 x 481,975 = 2,598.89 1.30 ---------------- ------------- Page Column Total 56,779,344 lb 28389.67 Tons Less CO2 76,379 lb 38.19 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 1.4-6 through 8 Estimated Annual Emissions Note that production from this facility is shared with the same site co-generation facility and the Old Digester Control Boiler facility, but this boiler installation may be called on to carry the entire campus heating load if the other facilities are in standby, or out of service. Organic Compound Pollutants (lb/10**6 SCF) MMBtu/YR Lbs/Year Tons/Year 2-Methylnaphthalene 2.40E-05 x 481,975 = 0.01 5.67E-06 3-Methylchloranthrene 1.80E-06 x 481,975 = 0.00 4.25E-07 7,12-Dimethylbenz(a)anthracene 1.60E-05 x 481,975 = 0.01 3.78E-06 Acenaphthene 1.80E-06 x 481,975 = 0.00 4.25E-07 Acenaphthylene 1.80E-06 x 481,975 = 0.00 4.25E-07 Anthracene 2.40E-06 x 481,975 = 0.00 5.67E-07 Benz(a)anthracene 1.80E-06 x 481,975 = 0.00 4.25E-07 Benzene 2.10E-03 x 481,975 = 0.99 0.000496 Benzopyrene 1.20E-06 x 481,975 = 0.00 2.84E-07 Benzo(b)fluoranthene 1.80E-06 x 481,975 = 0.00 4.25E-07 Benzo(g,h,i)perylene 1.20E-06 x 481,975 = 0.00 2.84E-07 Benzo(k)fluoranthene 1.80E-06 x 481,975 = 0.00 4.25E-07 Butane 2.10E+00 x 481,975 = 992.30 0.496151 Chrysene 1.80E-06 x 481,975 = 0.00 4.25E-07 Dibenzo(a,h)anthracene 1.20E-06 x 481,975 = 0.00 2.84E-07 Diclorobenzene 1.20E-03 x 481,975 = 0.57 0.000284 Ethane 3.10E+00 x 481,975 = 1,464.83 0.732413 Fluoroanthene 3.00E-06 x 481,975 = 0.00 7.09E-07 Fluorene 2.80E-06 x 481,975 = 0.00 6.62E-07 Formaldehyde 7.50E-02 x 481,975 = 35.44 0.01772 Hexane 1.80E+00 x 481,975 = 850.54 0.425272 Indeno(1,2,3-cd)pyrene 1.80E-06 x 481,975 = 0.00 4.25E-07 Naphthalene 6.10E-04 x 481,975 = 0.29 0.000144 Pentane 2.60E+00 x 481,975 = 1,228.56 0.614282 Phenanathrene 1.70E-05 x 481,975 = 0.01 4.02E-06 Propane 1.60E+00 x 481,975 = 756.04 0.37802 Pyrene 5.00E-06 x 481,975 = 0.00 1.18E-06 Toluene 3.40E-03 x 481,975 = 1.61 0.000803 ---------------- ------------- Page Column Total 5,331 lb 2.666 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 1.4-6 through 8 Potential Emission Calculations Central Weber Sewer Improvement District - Ogden Utah Name and Description of Source 525 kW Lean-Burn Engines 0 Waukesha VHP3600 6.048 Dth/H 8760 HR/YR 0.00 Dth/YR Estimated Annual Emissions from this Source Estimated maximum annual natural gas input to this facility 0 MMBTU per year (85 - 90,000 Dth x 10**3 SCF/year max. to start, load growth anticipated over time.) Maximum may be reduced by a contribution from the engine generator reject heat, up to 10 - 15,000 Dth/year. Pollutant Calculation Source Dth/year x EPA Factor = xxxx lbs/year ======================= xxxx tons /year Criteria Pollutants EPA Emissions Factor x Ann Fuel Use Yields (lb/MMBtu) MMBtu/year Lbs/Year Tons/Year CO2 1.10E+02 x 0 = 0 0 CO 5.57E-01 0 0 0 NOx 8.47E-01 x 0 = 0 0 PM10 7.71E-05 x 0 = 0.00 0 PM2.5 7.71E-05 x 0 = 0 0 PM Condensible Inc w/PM Total 9.91E-03 x 0 = 0.00 0 SO2 5.88E-04 x 0 = 0.00 0 TOC 1.47E+00 x 0 = 0.00 0 Methane (CH4) 1.25E+00 x 0 = 0.00 0 VOC 1.18E-01 x 0 = 0.00 0 ---------------- ------------- Page Column Total 0 lb 0.000 Tons Less CO2 0 lb 0.00 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 1.4-6 through 8 These existing engines have been removed from service. Estimated Annual Emissions Engines require 96 SCFM of natural gas for the max output of 525 kW. Assume 1,050 btu/CF of natural gas and 0.00105 Dth/CF of natural gas. 96 SCFM x 60 min/hr x 0.00105 Dth/CF = 6.05 Dth/HR Organic Compound Pollutants (lb/MMBtu) MMBtu/year Lbs/Year Tons/Year 1,1,2,2-Tetrachloroethanek 4.00E-05 x 0 = 0.00 0 1,1,2-Trichloroethanek 3.18E-05 x 0 = 0.00 0 1,1-Dichloroethane 2.36E-05 x 0 = 0.00 0 1,2,3-Trimethylbenzene 2.30E-05 x 0 = 0.00 0 1,2,4-Trimethylbenzene 1.43E-05 x 0 = 0.00 0 1,2-Dichloroethane 2.36E-05 x 0 = 0.00 0 1,2-Dichloropropane 2.69E-05 x 0 = 0.00 0 1,3,5-Trimethylbenzene 3.38E-05 x 0 = 0.00 0 1,3-Butadienek 2.67E-04 x 0 = 0.00 0 1,3-Dichloropropenek 2.64E-05 x 0 = 0.00 0 2-Methylnaphthalenek 3.32E-05 x 0 = 0.00 0 2,2,4-Trimethylpentanek 2.50E-04 x 0 = 0.00 0 Acenaphthenek 1.25E-06 x 0 = 0.00 0 Acenaphthylenek 5.53E-06 x 0 = 0.00 0 Acetaldehydek,l 8.36E-03 x 0 = 0.00 0 Acroleink,l 5.14E-03 x 0 = 0.00 0 Benzenek 4.40E-04 x 0 = 0.00 0 Benzo(b)fluoranthenek 1.66E-07 x 0 = 0.00 0 Benzo(e)pyrenek 4.15E-07 x 0 = 0.00 0 Benzo(g,h,i)perylenek 4.14E-07 x 0 = 0.00 0 Biphenylk 2.12E-04 x 0 = 0.00 0 Butane 5.41E-04 x 0 = 0.00 0 Butyr/Isobutyraldehyde 1.01E-04 x 0 = 0.00 0 Carbon Tetrachloridek 3.67E-05 x 0 = 0.00 0 Chlorobenzenek 3.04E-05 x 0 = 0.00 0 Chloroethane 1.87E-06 x 0 = 0.00 0 Chloroformk 2.85E-05 x 0 = 0.00 0 Chrysenek 6.93E-07 x 0 = 0.00 0 Cyclopentane 2.27E-04 x 0 = 0.00 0 Ethane 1.05E-01 x 0 = 0.00 0 Ethylbenzenek 3.97E-05 x 0 = 0.00 0 Ethylene Dibromidek 4.43E-05 x 0 = 0.00 0 Fluoranthenek 1.11E-06 x 0 = 0.00 0 Fluorenek 5.67E-06 x 0 = 0.00 0 Formaldehydek,l 5.28E-02 x 0 = 0.00 0 Methanolk 2.50E-03 x 0 = 0.00 0 Methylcyclohexane 1.23E-03 x 0 = 0.00 0 Methylene Chloridek 2.00E-05 x 0 = 0.00 0 n-Hexanek 1.11E-03 x 0 = 0.00 0 n-Nonane 1.10E-04 x 0 = 0.00 0 n-Octane 3.51E-04 x 0 = 0.00 0 n-Pentane 2.60E-03 x 0 = 0.00 0 Naphthalenek 7.44E-05 x 0 = 0.00 0 PAHk 2.69E-05 x 0 = 0.00 0 Phenanthrenek 1.04E-05 x 0 = 0.00 0 Phenolk 2.40E-05 x 0 = 0.00 0 Propane 4.19E-02 x 0 = 0.00 0 Pyrenek 1.36E-06 x 0 = 0.00 0 Styrenek 2.36E-05 x 0 = 0.00 0 Tetrachloroethanek 2.48E-06 x 0 = 0.00 0 Toluenek 4.08E-04 x 0 = 0.00 0 Vinyl Chloridek 1.49E-05 x 0 = 0.00 0 Xylenek 1.84E-04 x 0 = 0.00 0 ---------------- ------------- Page Column Total 0 lb 0.00 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, Table 3.2-2 Potential Emission Calculations Central Weber Sewer Improvement District - Ogden Utah Name and Description of Source Digester Gas Flare Estimated Annual Emissions from this Source Estimated maximum annual methane gas input to this facility 101,895 Dth/yr This page includes the parallel production of CO2 which accompanies methane production. Pollutant Calculation Source Dth/year x EPA Factor = xxxx lbs/year ==================/2000 = xxxx tons /year Criteria Pollutants EPA Emissions Factor x Ann Fuel Use Yields (lb/10**6 SCF) Dth/year Lbs/Year Tons/Year CO 0.37 x 101,895 = 37,701.16 18.85 NOx 0.0680 x 101,895 = 6,928.86 3.46 PM Total (Non-smoking flare) 0.0000 x 101,895 = 0.00 0.00 SO2 *150 ppm +/- H2S is worst case 0.0114 x 101,895 = 1,161.60 0.58 VOC Total Hydrocarbons 0.1400 x 101,895 = 14,265.30 7.13 ---------------- ------------- Page Column Total 60,057 lb 30 Tons *Emissions data for digester gas is not listed in AP 42, Fifth Edition, June 10, 2010, Table 13.5-2 Estimated Annual Emissions Assume that all of the maximum anticipated production of digester gas (plant sludge design capacity were to be flared, with no use by the Co-gen facility The sludge handling and processing capacity of the new treatment facility is 59,111 lbs of sludge solids per day which have the potential at 60% yield to generate 18 cubic feet of gas per pound, testing at up to 60% methane (CH4) by volume. This equates to 11.6 Dth/hr, 101,895 Dth/yr. Organic Compound Pollutants (lb/10**9 Dth) Dth/year Lbs/Year Tons/Year 2-Methylnaphthalene 0.0000240 x 101,895 = 0.00 1.22274E-06 3-Methylchloranthrene 0.0000018 x 101,895 = 0.00 9.17055E-08 7,12-Dimethylbenz(a)anthracene 0.0000160 x 101,895 = 0.00 8.1516E-07 Acenaphthene 0.0000018 x 101,895 = 0.00 9.17055E-08 Acenaphthylene 0.0000018 x 101,895 = 0.00 9.17055E-08 Anthracene 0.0000024 x 101,895 = 0.00 1.22274E-07 Benz(a)anthracene 0.0000018 x 101,895 = 0.00 9.17055E-08 Benzene 2.1000000 x 101,895 = 213.98 0.10698978 Benzopyrene 0.0000012 x 101,895 = 0.00 6.1137E-08 Benzo(b)fluoranthene 0.0000018 x 101,895 = 0.00 9.17055E-08 Benzo(g,h,i)perylene 0.0000012 x 101,895 = 0.00 6.1137E-08 Benzo(k)fluoranthene 0.0000018 x 101,895 = 0.00 9.17055E-08 Butane 2.1000000 x 101,895 = 213.98 0.10698978 Chrysene 0.0000018 x 101,895 = 0.00 9.17055E-08 Dibenzo(a,h)anthracene 0.0000012 x 101,895 = 0.00 6.1137E-08 Diclorobenzene 0.0012000 x 101,895 = 0.12 6.1137E-05 Ethane 3.1000000 x 101,895 = 315.87 0.157937294 Fluoroanthene 0.0000030 x 101,895 = 0.00 1.52843E-07 Fluorene 0.0000028 x 101,895 = 0.00 1.42653E-07 Formaldehyde 0.0750000 x 101,895 = 7.64 0.003821064 Hexane 1.8000000 x 101,895 = 183.41 0.091705526 Indeno(1,2,3-cd)pyrene 0.0000018 x 101,895 = 0.00 9.17055E-08 Naphthalene 0.0006100 x 101,895 = 0.06 3.1078E-05 Pentane 2.6000000 x 101,895 = 264.93 0.132463537 Phenanathrene 0.0000170 x 101,895 = 0.00 8.66108E-07 Propane 1.6000000 x 101,895 = 163.03 0.081516023 Pyrene 0.0000050 x 101,895 = 0.00 2.54738E-07 Toluene 0.0034000 x 101,895 = 0.35 0.000173222 ---------------- ------------- Page Column Total 1,363 lb 0.68 Tons *Emissions data for digester gas is not listed in AP 42, Fifth Edition, June 10, 2010. Factors for Natural Gas Combustion are indicated. Potential Emission Calculations Central Weber Sewer Improvement District - Ogden Utah Name and Description of Source Oil Fired Generator Sets Assume 140 - 145,000 Btu/Gallon of diesel fuel, use 140,000 Btu/gal Estimated Annual Emissions from this Source Estimated maximum annual diesel fuel input to this facility 15,400 Gal/yr x 137,030 Btu/gal x 2 generators = 4,221 MMBtu per year Pollutant Calculation Source Dth/year x EPA Factor = xxxx lbs/year ==================/2000 = xxxx tons /year Criteria Pollutants EPA Emissions Factor x Output Yields lb/MMBtu MMBtu/YR Lbs/Year Tons/Year CO2 From Combustion 165.00 x 4,221 = 696,386 348 CO 0.850 4,221 = 3,587 1.794 NOx (Uncontrolled) 3.200 x 4,221 = 13,506 6.753 NOx Controlled 1.900 x 4,221 = 8,019 4.009 PM Total 0.100 x 4,221 = 422 0.211 SOx 0.000015 x 4,221 = 0 0.000 TOC (91% non-methane, 9% methan 0.082 x 4,221 = 346 0.173 Methane (CH4) 0.0081 x 4,221 = 34 0.017 VOC x 4,221 = 0 0.000 ---------------- ------------- Page Column Total 722,301 lb 361.15 Tons Less CO2 25,914 lb 12.96 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 3.3-6 through 7 Estimated Annual Emissions There are two 2 mW gen set in the new Blower Building. All sets serve in standby only and are expected to be exercised on the order of 2 hours per week, not more than 100 hours per year, plus whatever time is spent in emergency service keeping the plant in continuous operation. Typical hourly fuel oil consumption of the generator sets in standby service is 0.075 - 0.080 gallons/hr per kWH. Use 0.08. The two machines would probably be exercised at different times, but a worst case for permitting would have both running at the same time. 154 gal/hr x 1 generators = 154 gal/hr Total is 154 gal/hr. Hourly emissions: 154 gal/hr +/- Calculate annual emissions: 154 gal/hr x 100 hrs/year =15,400 gal/yr +/- Organic Compound Pollutants lb/MMBtu MMBtu/YR Lbs/Year Tons/Year Acenaphthene 4.70E-06 x 4,221 = 0.0198365 9.91823E-06 Acenaphthylene 9.23E-06 x 4,221 = 0.0389554 1.94777E-05 Acetaldehyde 2.52E-05 x 4,221 = 0.1063572 5.31786E-05 Acrolein 7.88E-06 x 4,221 = 0.0332577 1.66289E-05 Anthracene 1.23E-06 x 4,221 = 0.0051912 2.59562E-06 Benz(a)anthracene 6.22E-07 x 4,221 = 0.0026252 1.31258E-06 Benzene 7.76E-04 x 4,221 = 3.2751266 0.001637563 Benzo(a)pyrene 2.57E-07 x 4,221 = 0.0010847 5.42337E-07 Benzo(b)fluoranthene 1.11E-06 x 4,221 = 0.0046848 2.34239E-06 Benzo(g,h,i)perylene 5.56E-07 x 4,221 = 0.0023466 1.17331E-06 Benzo(k)fluoranthene 2.18E-07 x 4,221 = 0.0009201 4.60037E-07 Chrysene 1.53E-06 x 4,221 = 0.0064574 3.2287E-06 Dibenzo(a,h)anthracene 3.46E-07 x 4,221 = 0.0014603 7.30151E-07 Fluoroanthene 4.03E-06 x 4,221 = 0.0170087 8.50436E-06 Fluorene 1.28E-05 x 4,221 = 0.0540227 2.70114E-05 Formaldehyde 7.89E-05 x 4,221 = 0.3329993 0.0001665 Indeno(1,2,3-cd)pyrene 4.14E-07 x 4,221 = 0.0017473 8.73648E-07 Naphthalene 1.30E-04 x 4,221 = 0.5486681 0.000274334 Phenanathrene 4.08E-05 x 4,221 = 0.1721974 8.60987E-05 Propylene 2.79E-03 x 4,221 = 11.7752620 0.005887631 Pyrene 3.71E-06 x 4,221 = 0.0156581 7.82907E-06 Toluene 2.81E-04 x 4,221 = 1.1859672 0.000592984 Xylenes 1.93E-04 x 4,221 = 0.8145611 0.000407281 ---------------- ------------- Page Column Total 18.357604 lb 0.009179 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 3.3-6 through 7 Shaded areas are void of Factor Potential Emission Calculations - Totals Central Weber Sewer Improvement District - Ogden Utah Summary of Emissions Totals Criteria Pollutants Lbs/Year Tons/Year CO2 57,399,351 28699.68 CO 80,980.68 40.49 Lead 0.24 0.00 NOx 52,079.77 26.04 N2O Controlled 302.42 0.15 PM Total 4,013.24 2.01 SO2 1,445.18 0.72 TOC 5,543.43 2.77 Methane (CH4)1,120.99 0.56 VOC 16,864.19 8.43 ---------------- ------------- Page Column Total 57,561,701 lb 28780.85 Tons Less CO2 162,350 lb 81.18 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 1.4-6 through 8 Estimated Annual Emissions Organic Compound Pollutants Lbs/Year Tons/Year 1,1,2,2-Tetrachloroethanek 0.00 0 1,1,2-Trichloroethanek 0.00 0 1,1-Dichloroethane 0.00 0 1,2,3-Trimethylbenzene 0.00 0 1,2,4-Trimethylbenzene 0.00 0 1,2-Dichloroethane 0.00 0 1,2-Dichloropropane 0.00 0 1,3,5-Trimethylbenzene 0.00 0 1,3-Butadienek 0.00 0 1,3-Dichloropropenek 0.00 0 2,2,4-Trimethylpentanek 0.00 0 2-Methylnaphthalene 0.01 6.89E-06 2-Methylnaphthalenek 0.00 0 3-Methylchloranthrene 0.00 5.17E-07 7,12-Dimethylbenz(a)anthracene 0.01 4.6E-06 Acenaphthene 0.02 1.04E-05 Acenaphthenek 0.00 0 Acenaphthylene 0.04 2E-05 Acenaphthylenek 0.00 0 Acetaldehyde 0.11 5.32E-05 Acetaldehydek,l 0.00 0 Acrolein 0.03 1.66E-05 Acroleink,l 0.00 0 Anthracene 0.01 3.28E-06 Benz(a)anthracene 0.00 1.83E-06 Benzene 218.25 0.109123 Benzenek 0.00 0 Benzo(a)pyrene 0.00 5.42E-07 Benzo(b)fluoranthene 0.01 2.86E-06 Benzo(b)fluoranthenek 0.00 0 Benzo(e)pyrenek 0.00 0 Benzo(g,h,i)perylene 0.00 1.52E-06 Benzo(g,h,i)perylenek 0.00 0 Benzo(k)fluoranthene 0.00 9.77E-07 Benzopyrene 0.00 3.45E-07 Biphenylk 0.00 0 Butane 1,206.28 0.603141 Butyr/Isobutyraldehyde 0.00 0 Carbon Tetrachloridek 0.00 0 Chlorobenzenek 0.00 0 Chloroethane 0.00 0 Chloroformk 0.00 0 Chrysene 0.01 3.75E-06 Chrysenek 0.00 0 Cyclopentane 0.00 0 Dibenzo(a,h)anthracene 0.00 1.07E-06 Diclorobenzene 0.69 0.000345 Ethane 1,780.70 0.890351 Ethylbenzenek 0.00 0 Ethylene Dibromidek 0.00 0 Fluoranthenek 0.00 0 Fluorene 0.06 2.78E-05 Fluorenek 0.00 0 Fluoroanthene 0.02 9.37E-06 Formaldehyde 43.41 0.021707 Formaldehydek,l 0.00 0 Hexane 1,033.96 0.516978 Indeno(1,2,3-cd)pyrene 0.00 1.39E-06 Methanolk 0.00 0 Methylcyclohexane 0.00 0 Methylene Chloridek 0.00 0 Naphthalene 0.90 0.00045 Naphthalenek 0.00 0 n-Hexanek 0.00 0 n-Nonane 0.00 0 n-Octane 0.00 0 n-Pentane 0.00 0 PAHk 0.00 0 Pentane 1,493.49 0.746746 Phenanathrene 0.18 9.1E-05 Phenanthrenek 0.00 0 Phenolk 0.00 0 Propane 919.07 0.459536 Propylene 11.78 0.005888 Pyrene 0.02 9.27E-06 Pyrenek 0.00 0 Styrenek 0.00 0 Tetrachloroethanek 0.00 0 Toluene 3.14 0.001569 Toluenek 0.00 0 Vinyl Chloridek 0.00 0 Xylenek 0.00 0 Xylenes 0.81 0.000407 ---------------- ------------- Page Column Total 6,713 lb 3.357 Tons *Emission Factors are taken from AP 42, Fifth Edition, June 10, 2010, pages 1.4-6 through 8