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Home My WebLink About20260063 CCr• •y. COLORADO 4 j Department of Public ® Health&Environment RECEIVED Colorado Counties - Clerk to the Board JAN 0 5 2026 January 5, 2026 WELD COUNTY COMMISSIONERS To Whom It May Concern: On January 5, 2026, the Colorado Air Pollution Control Division will begin a 30-day public comment period for a new General Permit 12 (GP12). The GP12 provides a voluntary mechanism for companies to obtain an air permit to authorize the construction of well production facilities. It is intended to provide an enhanced alternative to the existing general permits. A copy of this public notice is enclosed. Thank you for assisting the division by posting a copy of this notice in your office. A public copy of this notice is required by Colorado Air Quality Control Commission regulations. The notice must be available for public inspection for a period of thirty (30) days from the beginning of the public comment period. Please reference the public notice for instructions on submitting comments. ,_°i c°� CO 80246-1530 P 303-692-2000 www.colorado.Qov/cdphe ,�w - . _� \ 4300 Cherry Creek Drive S., Denver, I,;T/,":,-;":1 \,; Jared Polls, Governor 1 Jill Hunsaker Ryan, MPH, Executive Director Vv.`a\\ '.'' -47'*- v:et--3 Lc'.?UszE\rnc.\1)e,>\�L( ' o��•(-%c- O\ \ \2�\ a\D pia(G�\c.v-.\ -bo\ot,\•r•u\sg)CAN lik"•) 2026-0063 O\ \u�5 \alo MY�v Air Pollution Control Division Notice of a Proposed Construction Permit Warranting Public Comment COPHE Website Title: General Permit 12 - Well Production Facilities Notice Period Begins: January 5, 2026 Notice is hereby given that an application for a proposed project or activity has been submitted to the Colorado Air Pollution Control Division for the following source of air pollution: Applicant: CDPHE Facility: Well Production Facilities Colorado The proposed project or activity is as follows: The CDPHE Air Pollution Control Division released the General Permit 12 (GP12) draft for a 30 day public comment for well production facilities. The division will accept and consider all comments and feedback through February 4. The GP12 provides a voluntary mechanism for companies to obtain an air permit to authorize the construction of well production facilities. It is intended to provide an enhanced alternative to the existing general permits. The GP12 applies to equipment, including but not limited to: • Storage tanks. • Hydrocarbon liquids loadout operations. • Gas venting from separators. • Routine or predictable emissions (ROPE). • Natural gas-fired internal combustion engines. • Diesel-fired internal combustion engines. • Fugitive component leak emissions. The division has determined that this permitting action is subject to public comment requirements under Colorado Air Quality Control Commission Regulation Number 3, Part B, Section III.C due to the following reason(s): ti°F•coto 4300 Cherry Creek Drive S., Denver, CO 80246-1530 I P 303-692-2000 I www.colorado.gov/cdphe ly " `=• ' Jared Polls, Governor I Jill Hunsaker Ryan, MPH, Executive Director *1876* • This source is requesting a federally-enforceable limit on the potential to emit to avoid other requirements. (Regulation Number 3, Part B, Section III.C.1.d.) The division has made a preliminary determination of approval of the application. A copy of the application, the division's analysis, and a draft of construction permit number GP12 are available on the division website: Air Permit Public Notices The division hereby solicits submission of public comments from any interested person concerning the ability of the proposed project or activity to comply with the applicable standards and regulations of the commission. The division will receive and consider written public comments for thirty (30) calendar days after the date of this notice. Comments may be submitted using the following options: • Submit comments via web form: Form for Public Comment on Draft Permit • Submit comments via email: cdphe apcd airpermitcomments@state.co.us • Submit comments via mail: Air Pollution Control Division - Oil Et Gas Unit Colorado Department of Public Health and Environment 4300 Cherry Creek Drive South, APCD-SS-B1 Denver, CO 80246-1530 NOTE: Comments submitted to the division will be uploaded to an online document repository and will be accessible to the public. Your comment(s) and the division's response(s) are not considered confidential and will be publicly accessible, including your name and any other personal information you provide in your comment(s). ov•co mow,,, 4300 Cherry Creek Drive S., Denver, CO 80246-1530 I P 303-692-2000 I www.colorado.gov/cdohe * 2; vi Jared Polls, Governor I Jill Hunsaker Ryan, MPH, Executive Director 6�`187 Crtr r COLORADO Air Pollution Control Division CDPHE Department of Public Health&Environment GP12 Workbook Instructions Date: XX/XX/XXXX GP12 Dispersion Modeling Study The Colorado Air Pollution Control Division (APCD) developed a facility-wide GP12 general permit for use by minor New Source Review (NSR) well production facilities in Colorado. Sources may use the GP12 workbook to demonstrate compliance with National Ambient Air Quality Standards (NAAQS).The GP12 workbook streamlines a demonstration of compliance with the NAAQS and Colorado Ambient Air Quality Standards (CAAQS). The underlying NAAQS Analysis in the GP12 workbook is supported by a study conducted by Ramboll which included thousands of modeling runs using AERMOD (EPA's recommended air dispersion model) and emission rates and stack parameters that are typical of equipment found at well production facilities in Colorado. The calculated impacts determined by the GP12 workbook, which come from that study, depend on site-specific meteorology, background concentrations,terrain, emission source types, and distances from emission sources to the facility boundary. Please see the Ramboll dispersion modeling report posted on the CDPHE air quality modeling website for more information on assumptions that went into the study that supports the NAAQS determinations produced by the GP12 workbook. GP12 Applicability The GP12 Workbook is only for determining NAAQS compliance for new facilities applying for coverage under GP12. For existing facilities submitting a request to convert existing permits to a GP12 or modify an existing GP12, the APCD-114 Modeling Determination form must be submitted and approved by the Dispersion Modeling Unit (DMU)according to the procedure Page 1of9 COLORADO Air Pollution Control Division CDPHE Department of Public Health&Environment described on the CDPHE air quality modeling website.The GP12 Workbook may be used only if each of the following conditions are true: • The emission units are point sources with unobstructed vertical releases. Screens on stacks and certain stack designs that provide protection from precipitation without impeding exhaust flow are not considered obstructions, but 'conventional' rain caps are considered an obstruction.The GP12 Workbook is not applicable, and may not be used, for area and volume sources such as haul roads and fugitives or for release types such as capped and horizontal; • The facility emission units fall into the following categories of source types: a) Heaters(HTR) b) Enclosed Combustion Devices(ECD) c) Engines (ENG); • The emission units are located at least 10 meters from the facility fenceline or ambient air boundary. For facilities without a physical fence surrounding them, an ambient air boundary may be established using other methods such as no trespassing signage, surveillance monitoring, daily site visits, or on-site personnel. This GP12 workbook is not applicable, and may not be used, for emission unit(s) closer than 10 meters to ambient air; and • There are no significant structures that could contribute to building downwash from emission sources at the facility as informed by the structure influence area based on stack/structure heights and relative locations from 40 CFR 51.100(ii)(2) and 50.100(jj)(1). Building downwash evaluation methods are also described in the Colorado Minor NSR Page 2 of 9 ...--7.741. QM �Y�M,C �, C O L O R A D O � �- Air Pollution Control Division CDPHE Department of Public Health&Environment Source Modeling Guideline for Air Quality Permits available on the CDPHE air quality modeling website. The 6 Steps for Using the GP12 Workbook Step 1: Determine which of the ten (10) GP12 Regions the facility is located in. There are different GP12 Workbooks available for each of the ten (10) GP12 regions, which are based on unique meteorology and background concentrations of pollutants across the State of Colorado: • Northeast (1-6) • Northeast(7) Note:this GP12 region reflects the Denver area and is delineated by the 1- 470 loop • Southeast • North Central • Central • South Central • Northwest • West Central • Southwest Corner • Southwest Page 3of9 aM�M�M COLORADO ,Y Air Pollution Control Division CDPHE Department of Public Health&Environment Nil iii a APIJ U _ (7L a] .01r11141 441 VI ur ii . ,.. ...,. Determine the GP12 region in which the facility will be located. If the facility is located near a GP12 Region border, please use the facility latitude/longitude coordinates in the Google Earth kmz file provided on the CDPHE air quality modeling website. If still unsure of which region to select, please email the Dispersion Modeling Unit(DMU)for guidance: cdphe apcd modeling files@state.co.us. (Please note this email address contains underscores between each word.) Step 2: Download the GP12 Workbook from the CDPHE air quality modeling website for the corresponding GP12 Region selected in Step 1. Please note that some GP12 regions that use the same meteorology and background concentrations were combined into one workbook. For example, the Northwest and West Central GP12 regions share the same GP12 workbook. Page 4 of 9 41 COLORADO a ...or. Air Pollution Control Division CDPHE Department of Public Health&Environment For full functionality, GP12 Workbooks must be opened with the Excel desktop application, version 2016 or later. In general, the GP12 Workbook has grey colored cells to indicate fields for the applicant to fill out. These grey cells serve as quick visual indicators, but the rest of this GP12 Workbook instructions document references specific cells to enhance digital accessibility. Step 3: Fill out the Facility Information on the Project Information tab The Project Information tab of the GP12 Workbook contains Facility Information (cells C3 to C15)to be filled out by the applicant. Cells C3 to C13 are basic self-explanatory facility information. Cell C14 is a dropdown for the selected GP12 Region in Step 1. Cell C15 is a dropdown for flat or complex terrain (see Step 4 below). Step 4: Demonstrate whether the facility is located in flat or complex terrain. The GP12 Workbook can use either flat or complex terrain for each of the ten (10) GP12 regions. In general, for the purposes of the GP12, flat terrain has a slope less than 10%and complex terrain has surrounding features with a slope greater than 10%. Facilities located in the more mountainous GP12 regions are likely to have complex terrain. Facilities located in the GP12 regions covering the eastern plains, which includes the 2008 and 2015 ozone nonattainment areas, may be able to demonstrate the use of flat terrain. Complex terrain is more conservative than flat terrain and is the default if no supporting documentation for flat terrain is provided. Flat terrain may be demonstrated using the elevation contours from a topographical map of the facility location. For example, if the vertical elevation does not increase more than 100 feet within 1000 feet of the facility, then the terrain may be characterized as flat. Page 5 of 9 M�M�M COLORADO o;YAir Pollution Control Division CD HE Department of Public Health&Environment Google Earth is another free resource available to demonstrate flat terrain, when the terrain type cannot be determined using a topographical map. Select the ruler tool and draw a 1000- foot radius circle around the facility. Select the 'Circle Measure' item that appears in the left pane, right click, and select 'Show Elevation Profile'. Subtract the highest elevation in the profile from the elevation of the facility(known from site surveys or obtained in Google Earth). If the difference between highest elevation and facility elevation is greater than 100 feet,then the terrain should be characterized as complex. Select flat or complex terrain under Facility Information in the Project Information tab (cell C15). If flat terrain is selected, provide a topographical map and additional elevation documentation to support the elevation changes at the facility demonstrating flat terrain. Step 5: Fill out the Source Inputs on the Project Information tab The Project Information tab of the GP12 Workbook contains Source Inputs (rows 19 to 31, C19 to AZ31)to be filled out by the applicant. Select the equipment type (Engine ENG, Heater HTR, or Enclosed Combustion Device ECD)from the dropdown menus in row 21, columns C to AZ, as needed.The GP12 Workbook can accommodate up to SO different emission sources (i.e. Source 1, Source 2, Source 3, etc.). For each different emission source, enter the hourly emission rate in pounds per hour(lb/hr)for each criteria pollutant in rows 22 to 26. Enter the shortest distance from each respective source to the facility fenceline/boundary in units of meters (m) in row 27 and provide a scaled facility layout showing the locations of the emission sources and the facility boundary as supporting documentation. Enter stack parameters for each respective source in rows 28 to 31. Stack parameters include Stack height in units of meters (m), Exit temperature in units of Kelvin (K), Exit velocity in units of meters per second (m/s), and Stack diameter in units of meters (m). For the Enclosed Combustion Devices (ECD) equipment type, the GP12 Workbook requires a minimum exit velocity of 0.1 m/s. Page 6 of 9 C. COLORADO Air Pollution Control Division CDPHE M� Department of Public Health&Environment Facilities with multiple identical emission sources may represent those sources in the GP12 Workbook as just one source, with all the emissions coming from that one source. When entering multiple identical emission units as a single source the user should update the Yes/No dropdown in row 19 to 'Yes' and enter the number of identical units in row 20 for the corresponding source column. For entering source information the stack parameters (height, temperature, velocity, and diameter)should be for just one of the identical emission sources, and the emissions should be the sum of emissions from all identical sources. For example, if your project has eight (8) identical 0.5 MMBtu/hr heaters and NOx emissions of 0.2 lb/hr from each heater, you would enter the height,temperature, velocity, and diameter for a single 0.5 MMBtu/hr heater in rows 28 to 31 and enter a NOx emission rate of 1.6 lb/hr (8 x 0.2= 1.6) in row 22. To account for varying locations of multiple identical sources, enter the distance in units of meters (m)for the heater with the shortest distance to the facility fenceline/boundary in row 27. A Project Summary section is provided on the Project Information tab which presents sums of hourly emissions in pounds per hour(lb/hr) for each criteria pollutant, shortest distance to facility fenceline/boundary, and number of each equipment type represented in the project. Step 6: Interpreting Calculated Impacts on the Results tab The GP12 Workbook calculates a representative impact for the proposed source (ground-level concentration in units of micrograms per cubic meter µg/m3)for each of the following criteria pollutants and averaging periods presented on the Results tab: • NO2(1-hour, Annual) • CO (1-hour, 8 hour) • 5O2(1-hour, 3-hour,Annual) Page 7 of 9 1.1 COLORADO Air Pollution Control Division CDPHE Department of Public Health&Environment • PM2.5 (24-hour, Annual) • PM10 (24-hour) These representative impacts (µg/m3) are calculated using all the information entered by the source in the Project Information tab and employing the methodology and assumptions described in the Ramboll dispersion modeling report posted on the CDPHE air quality modeling website.The impacts are summed with the default background concentration to calculate total cumulative impacts displayed in cells F5 to F14 of the Results tab.The total cumulative impacts are automatically compared to their corresponding NAAQS/CAAQS values presented in cells H5 to H14, and a Yes or No is displayed in cells G5 to G14 to indicate whether compliance has been demonstrated. A'Yes' means the facility requesting coverage under a GP12 will not cause an exceedance of any NAAQS/CAAQS while a `No' means the facility requesting coverage under a GP12 has failed to demonstrate it will not cause an exceedance of any NAAQS/CAAQS. For PM2.5 compliance it may be acceptable to submit separate workbooks for engine and non- engine sources and sum the corresponding impacts since allocating engine PM2.5 emissions to representative heater sources frequently results in a substantial overestimation of particulate impacts. Contact DMU for further guidance and discussion if this option is planned to be used. If NAAQS/CAAQS compliance cannot be demonstrated using the GP12 Workbook, then a APCD- 114 Modeling Determination form may be submitted and approved by the Dispersion Modeling Unit(DMU) according to the procedure described on the CDPHE air quality modeling website, or an individual modeling analysis using AERMOD to show compliance with the NAAQS may be submitted to DMS. Guidance on modeling procedures and how to use the APCD Form-114 process and/or request necessary model input files are available on the CDPHE air quality modeling website. Page 8 of 9 C .r.trio COLORADO Air Pollution Control Division CDPHE Department of Public Health&Environment GP12 Workbook Documentation and Submittal to APCD The GP12 Workbook and supporting documentation must be submitted to DMU for review and verification. DMU will either approve or reject the submission. Upon verification by DMU that all submitted information is correct, the GP12 Workbook package demonstrating compliance with the NAAQS/CAAQS must be included with the permit application and will be part of the permit record. A complete GP12 Workbook package includes: • Completed GP12 Workbook (Excel file) • Topographical map and additional elevation documentation demonstrating a flat terrain (if applicable) • Documentation of Emission Source parameters (height,temperature, velocity, diameter) • Scaled facility layout for distance from emission sources to facility fenceline/boundary • Any email correspondence with DMU Please submit the GP12 Workbook and documentation, or any inquiries about the GP12 Workbook Instructions,to DMU at: cdphe apcd modeling files@state.co.us. (Please note this email address contains underscores between each word.) Page 9 of 9 Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. L- _ _ w � y -.�� Results (Based on Minimum Distance to Ambient Air of 10 meters) Averaging Facility Impacts Default Background Value Cumulative Pollutant g g p g Is Compliance Standard Impacts Period Demonstrated? (µg/m3)1 (Iig/m3) (itg/m3) (µg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 SO2 1-hour NA NA NA NA 196 SO2 3-hour NA NA NA NA 700 SO2 Annual NA NA NA NA 26 PM2.5 24-hour NA NA NA NA 35 PM2.5 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 1 The standard for 3-hr 5O2 is based on the CAAQS of 700 ug/m3. Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. ..L77=- •10 - - -4" _ _ _777-77 17-7, ••••• 7 • *7±:777177:177'1 =NM= ..••••• Results (Based on Minimum Distance to Ambient Air of 10 meters) Averaging Facility Impacts Default Background Value Cumulative Pollutant g g p g Impacts Is Compliance Standard Period Demonstrated? (µg/m3)1 (µg/m3) (µg/m3) (µg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 SO2 1-hour NA NA NA NA 196 5O2 3-hour NA NA NA NA 700 5O2 Annual NA NA NA NA 26 PM25 24-hour NA NA NA NA 35 PM25 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 1 The standard for 3-hr SO2 is based on the CAAQS of 700 ug/m3. Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. Results (Based on Minimum Distance to Ambient Air of 10 meters) Cumulative Averaging Facility Impacts Default Background Value Is Compliance Standard Pollutant Impacts Period Demonstrated? (µg/m3)1 (µg/m3) (µg/►r3) (µg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 5O2 1-hour NA NA NA NA 196 SO2 3-hour NA NA NA NA 700 SO2 Annual NA NA NA NA 26 PM2.5 24-hour NA NA NA NA 35 PM2.5 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 1 The standard for 3-hr SO2 is based on the CAAQS of 700 ug/m3. Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. ....... ..„, ...... ==.._... �eMl+Yu • A +A!� kW �."Q '� 1�,i� �' ��Ir�. � �* 1. e'• MI�. \ i� -. - Results (Based on Minimum Distance to Ambient Air of 10 meters) Averaging Facility Impacts Default Background Value Cumulative Pollutant g g p g Impacts Is Compliance Standard Period Demonstrated? (µg/m3)1 (µg/m3) (µg/m3) (gg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 SO2 1-hour NA NA NA NA 196 5O2 3-hour NA NA NA NA 700 SO2 Annual NA NA NA NA 26 PM2.5 24-hour NA NA NA NA 35 PM25 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 1 The standard for 3-hr 5O2 is based on the CAAQS of 700 ug/m3. Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. WINS Ile MOMWSMEMMN MO IMO ME ZG =IWO&II2 11. MLi.=Maii IBM= NGMI NGMONZMO SOB OMIOM IMO IC`X71 ILO MN'SCOS`KZ SIC WO Mk"�ML.IN9i �•111rNMI Mr ION IINSr NO MN MS!NOMIM O MOB MI OW BEI 1E NMI ME mfIMlONMrSOOSGMO.BNMtlitMI®MOOt1!ISOMOSOM lilNlmcttsitaAM1c�t Results (Based on Minimum Distance to Ambient Air of 10 meters) Cumulative Averaging Facility Impacts Default Background Value Is Compliance Standard Pollutant Impacts Period Demonstrated? (µg/m3)1 (µg/m3) (µg/m3) (µg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 SO2 1-hour NA NA NA NA 196 SO2 3-hour NA NA NA NA 700 SO2 Annual NA NA NA NA 26 PM2.5 24-hour NA NA NA NA 35 PM2 5 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 1 The standard for 3-hr SO2 is based on the CAAQS of 700 ug/m3. Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: [user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. ..„. , , _ L _ _a __ ` - s� ._e.. ,'7".-x,"2""4,7 �T 7 14"T--�7 'C tc: 'f "r". g 1'4 tic Ezra-g-"'• �.r�.7.-7,:"C 7..\-T 7- ,� �.iTfs • Results (Based on Minimum Distance to Ambient Air of 10 meters) Cumulative Averaging Facility Impacts Default Background Value Is Compliance Standard Pollutant Impacts Period Demonstrated? (µg/m3)1 (µg/m3) (lag/m3) (µg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 SO2 1-hour NA NA NA NA 196 SO2 3-hour NA NA NA NA 700 5O2 Annual NA NA NA NA 26 PM2.5 24-hour NA NA NA NA 35 PM25 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 1 The standard for 3-hr SO2 is based on the CAAQS of 700 ug/m3. Definitions and Abbreviations Abbreviation Term BG background Data GPW General Permit Workbook ECD Enclosed Combustion Device ENG Engine HTR Heater Instructions: Go to Project Information tab and: Enter information in each of these cells: user input cells *note the'select region'and'select terrain'are drop down menus that is selected by the applicant,denoted by red font *enter emission source inputs for each project source (up to 50) *note the equipment type is a drop down menu,denoted by red font *note the emissions are entered in lb/hr and the stack parameters are in metric *note if distance to ambient air is<10 meters,it will reset to 10 meters Using the input information from above,the spreadsheet will return the estimated project impacts and compare to the applicable air quality standards in the'Results'tab. argil iii llT R'lOlfTamaMt7`.15maai'�SIR�MSIG 4�.... :,,V9lk`-•..:- ..-.., D..•A-:E� .t3!RT�T�■ w.� aw:arI�1t� � ... .�,�au.@v rraex8tesiry-cx.� "aUe ..— ,---• —....ems �.,..,� .� ®..,.._.. a...� .,,,,. _ _ 1 Results (Based on Minimum Distance to Ambient Air of 10 meters) Cumulative Averaging Facility Impacts Default Background Value Is Compliance Standard Pollutant Impacts Period Demonstrated? (µg/m3)1 (µg/m3) (µg/m3) (µg/m3) NO2 1-hour NA NA NA NA 188 NO2 Annual NA NA NA NA 100 CO 1-hour NA NA NA NA 40,000 CO 8-hour NA NA NA NA 10,000 SO2 1-hour NA NA NA NA 196 SO2 3-hour NA NA NA NA 700 SO2 Annual NA NA NA NA 26 PM25 24-hour NA NA NA NA 35 PM2 5 Annual NA NA NA NA 9 PM10 24-hour NA NA NA NA 150 Footnotes: 'The standard for 3-hr SO2 is based on the CAAQS of 700 ug/m3. Hello