Appendix F Air Quality Technical Support Document, Atlantic Rim Natural Gas Project and the Seminoe Road Gas Development Project, Wyoming AIR QUALITY TECHNICAL SUPPORT DOCUMENT, ATLANTIC RIM NATURAL GAS PROJECT AND THE SEMINOE ROAD GAS DEVELOPMENT PROJECT, WYOMING Prepared for Bureau of Land Management, Rawlins Field Office Rawlins, Wyoming Prepared by TRC Environmental Corporation Laramie, Wyoming July 2006 AIR QUALITY TECHNICAL SUPPORT DOCUMENT, ATLANTIC RIM NATURAL GAS PROJECT AND THE SEMINOE ROAD GAS DEVELOPMENT PROJECT, WYOMING Prepared for Bureau of Land Management, Rawlins Field Office Rawlins. Wyoming By TRC Environmental Corporation Laramie, Wyoming TRC Project 28822 July 2006 AQTSD, Atlantic Rim and Seminoe Road Projects i TABLE OF CONTENTS Page 1.0 INTRODUCTION ....................................................................................................................1 1.1 ATLANTIC RIM PROJECT DESCRIPTION .............................................................4 1.1.1 Well Development .........................................................................................5 1.1.2 Well Operation...............................................................................................6 1.1.3 Ancillary Facilities.........................................................................................7 1.2 ATLANTIC RIM ALTERNATIVES EVALUATED..................................................7 1.3 ATLANTIC RIM STUDY TASKS ..............................................................................8 1.4 SEMINOE ROAD PROJECT DESCRIPTION............................................................8 1.4.1 Well Construction ..........................................................................................9 1.4.2 Well Development .........................................................................................9 1.4.3 Ancillary Facilities.......................................................................................10 1.4.4 Power Requirements ....................................................................................10 1.4.5 Reclamation .................................................................................................10 1.5 SEMINOE ROAD ALTERNATIVES EVALUATED ..............................................11 1.6 SEMINOE ROAD STUDY TASKS...........................................................................11 2.0 EMISSIONS INVENTORY ...................................................................................................13 2.1 ATLANTIC RIM PROJECT EMISSIONS ................................................................13 2.1.1 Construction Emissions ...............................................................................13 2.1.2 Production Emissions ..................................................................................15 2.1.3 Total Field Emissions ..................................................................................19 2.2 SEMINOE ROAD PROJECT EMISSIONS ..............................................................19 2.2.1 Construction Emissions ...............................................................................20 2.2.2 Production Emissions ..................................................................................22 2.2.3 Total Field Emissions ..................................................................................24 2.3 REGIONAL EMISSIONS INVENTORY..................................................................26 3.0 NEAR-FIELD MODELING ANALYSES.............................................................................30 3.1 MODELING METHODOLOGY ...............................................................................30 3.2 METEOROLOGY DATA ..........................................................................................30 3.3 BACKGROUND POLLUTANT CONCENTRATIONS...........................................32 3.4 ATLANTIC RIM CRITERIA AND HAP POLLUTANT IMPACT ASSESSMENT......................................................................................................32 3.4.1 PM10/PM2.5 ...................................................................................................35 3.4.2 SO2 ...............................................................................................................37 3.4.3 NO2 ..............................................................................................................39 3.4.4 CO................................................................................................................42 3.4.5 Ozone (O3) ...................................................................................................42 3.4.6 HAPS ...........................................................................................................45 3.5 SEMINOE ROAD CRITERIA AND HAP POLLUTANT IMPACT ASSESSMENT......................................................................................................50 28822 TRC Environmental Corporation ii AQTSD, Atlantic Rim and Seminoe Road Projects 3.5.1 PM10/PM2.5 ...................................................................................................52 3.5.2 SO2 ...............................................................................................................54 3.5.3 NO2 ..............................................................................................................56 3.5.4 CO................................................................................................................58 3.5.5 Ozone (O3) ...................................................................................................59 3.5.6 HAPS ...........................................................................................................61 4.0 FAR-FIELD ANALYSES ......................................................................................................65 4.1 MODELING METHODOLOGY ...............................................................................66 4.2 PROJECT MODELING SCENARIOS ......................................................................67 4.3 METEOROLOGICAL MODEL INPUT AND OPTIONS ........................................69 4.4 DISPERSION MODEL INPUT AND OPTIONS......................................................72 4.4.1 Chemical Species.........................................................................................72 4.4.2 Model Receptors ..........................................................................................73 4.4.3 Source Parameters........................................................................................73 4.5 BACKGROUND DATA ............................................................................................77 4.5.1 Criteria Pollutants ........................................................................................77 4.5.2 Visibility ......................................................................................................77 4.5.3 Deposition....................................................................................................81 4.5.4 Lake Chemistry............................................................................................81 4.6 IMPACT ASSESSMENT...........................................................................................82 4.6.1 Concentration...............................................................................................83 4.6.2 Deposition....................................................................................................86 4.6.3 Sensitive Lakes ............................................................................................86 4.6.4 Visibility ......................................................................................................87 5.0 REFERENCES .......................................................................................................................92 APPENDIX A: AIR QUALITY IMPACT ASSESSMENT PROTOCOL APPENDIX B1: ATLANTIC RIM EMISSIONS INVENTORY APPENDIX B2: SEMINOE ROAD EMISSIONS INVENTORY APPENDIX C: REGIONAL INVENTORY METHODOLOGY APPENDIX D1: ATLANTIC RIM NEAR-FIELD MODELING, SOURCE EMISSIONS AND MODELING PARAMETERS APPENDIX D2: SEMINOE ROAD NEAR-FIELD MODELING, SOURCE EMISSIONS AND MODELING PARAMETERS APPENDIX E: SURFACE AND UPPER AIR METEOROLOGICAL STATIONS AND THE PRECIPITATION STATIONS USED IN THE ANALYSIS 28822 TRC Environmental Corporation AQTSD, Atlantic Rim and Seminoe Road Projects iii APPENDIX F1: ATLANTIC RIM FAR-FIELD MODELING RESULTS APPENDIX F2: SEMINOE ROAD FAR-FIELD MODELING RESULTS LIST OF MAPS Page Map 1.1 Atlantic Rim Natural Gas Development and Seminoe Road Gas Development Locations, Carbon County, Wyoming............................................ 2 Map 1.2 Air Quality Study Area/Modeling Domain ........................................................... 3 LIST OF FIGURES Page Figure 2.1 Approximate Single Well Development Timeline ............................................... 14 Figure 2.2 Approximate Single Well Development Timeline ............................................... 21 Figure 2.3 Regional Inventory Area and Included NEPA Project Areas............................... 28 Figure 3.1 Wind Rose, Rawlins, Wyoming, 2000-2003 ........................................................ 31 Figure 3.2 Atlantic Rim Near-field PM10/PM2.5 Source and Receptor Layouts .................... 36 Figure 3.3 Atlantic Rim Near-field SO2 Source and Receptor Layouts................................. 38 Figure 3.4 Atlantic