Introduction
The WSAQS used the Sparse Matrix Operator Kernel Emissions (SMOKE) processing system version 3.5.1 to prepare emissions inputs for photochemical grid models (PGMs). The WSAQS 2011 version B (WSAQS2011b) emissions modeling platform consists of data and software to estimate air emissions fluxes that best represent the conditions in the western U.S. during 2011. The base 2011 modeling period is annual, and included a model spin-up period from December 16 to December 31, 2011. The modeling domain includes a 36 km continental US (CONUS) domain with a 12 km nest over the western U.S. and a 4-km nest the covers the states of Colorado, Utah, and Wyoming.
The following sectors were used to represent air pollutant emissions for the WSAQS:
- Aircraft/locomotive/marine (ALM)
- Off-road mobile (Nonroad)
- On-road mobile (Onroad)
- Non-point/Area (Nonpoint)
- Fugitive Dust
- Fertilizer
- Livestock
- Residential Wood Combustion (RWC)
- Area oil and gas (Area O&G)
- Point oil and gas (Point O&G)
- Continuous Emission Monitor (CEM) point (EGU Point)
- Non-CEM point (NonEGU Point)
- Offshore shipping (Offshore)
- Fires (Fire)
- Canada and Mexico sources (Non-US)
- MEGAN biogenics (Biogenic)
- Windblown dust (WBD)
- Sea salt
- Lightning
Details of the sources and nature of these emissions data are provided in the 3SAQS 2011 Modeling Protocol.
2011 Phase II Oil and Gas Emission Inventories and Projection Factors
The table below includes links to spreadsheets with the base year (2011) and projection year (2020) 3SAQS Phase I oil and gas inventories. Brief descriptions of the inventory data are supplemented by additional details of these data in each spreadsheet.
In general, activity projections for each basin were made based on statistical analysis of historical activity data for calendar year 2020. Each source category was assigned the projection estimate for the activity category to which it was most closely associated. For example, drill rig activity would be most closely associated and therefore assigned the activity projection of new spuds. Emission projections also include the effects of regulations which require controls beyond those in place in the 2011 base year.
| Basin | 2011 | 2020 | Description |
| Big Horn | xls | xlsIn Progress | For 2011, area source emissions were directly provided by Wyoming Department of Environmental Quality (WYDEQ) for all Wyoming counties. Emissions outside Wyoming counties are excluded from the inventory due to lack of information on activity in Montana counties for this basin. The permitted source emissions were obtained from WYDEQ for the calendar year 2011.
Controls were applied to only drilling and workover engines emissions as consistent with other basins. |
| Denver-Julesberg | xls | xlsIn Progress | 2008 WestJump survey-based emissions were projected to 2011 based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. Each source category was assigned the projection estimate for the activity category to which it was most closely associated. For example, drill rig activity would be most closely associated and therefore assigned the activity projection of new spuds. The permitted APEN sources emissions were directly obtained from the Colorado Department of Public Health and Environment (CDPHE) for the calendar year 2011. Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies. |
| North San Juan | xls | xls | 2008In WestJump survey-based emissions were projected to 2011 based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. Each source category was assigned the projection estimate for the activity category to which it was most closely associated. For example, drill rig activity would be most closely associated and therefore assigned the activity projection of new spuds. The permitted APEN sources emissions were directly obtained from the Colorado Department of Public Health and Environment (CDPHE) for the calendar year 2011. Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies. |
Paradox | xls | xls | For this basin, only permitted emissions were captured as area source emissions estimation was beyond the scope of work for this study. The permitted source emissions were obtained from the Colorado Department of Public Health and Environment (CDPHE), the Uintah Department of Environmental Quality (UTDEQ) and Environmental Protection Agency (EPA) for the calendar year 2011.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I 3SAQS oil and gas emission inventories, emission controls were not applied to emissions provided by state agencies.Progress |
| Piceance | xls | xlsIn Progress | 2008 WestJump survey-based emissions were projected to 2011 based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. Each source category was assigned the projection estimate for the activity category to which it was most closely associated. For example, drill rig activity would be most closely associated and therefore assigned the activity projection of new spuds. The permitted APEN sources emissions were directly obtained from the Colorado Department of Public Health and Environment (CDPHE) for the calendar year 2011. Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies. |
| Powder River | xls | xlsIn Progress | For 2011, area source emissions were directly provided by the Wyoming Department of Environmental Quality (WYDEQ) for all Wyoming counties. Area source emissions outside Wyoming counties for 2011 were projected from 2008 WestJump EI based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. The permitted source emissions were obtained from WYDEQ and Environmental Protection Agency (EPA). Montana permitted source emissions were projected from 2008 WestJump EI based on estimated change in activity.
Controls were applied to only drilling and workover engines emissions as consistent with other basins. |
Raton | xls | xls | For this basin, only permitted emissions were captured as area source emissions estimation was beyond the scope of work for this study. The permitted APEN sources emissions were directly obtained from the Colorado Department of Public Health and Environment (CDPHE) for the calendar year 2011. As per the database provided by the New Mexico Environmental Department, there are no title V permitted sources on any New Mexico counties for this basin in 2011.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were not applied to emissions provided by state agencies. |
| Southwest Wyoming | xls | xlsIn Progress | For 2011, area source emissions were directly provided by the Wyoming Department of Environmental Quality (WYDEQ) for all Wyoming counties. Area source emissions outside Wyoming counties for 2011 were projected from 2008 WestJump EI based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. The permitted source emissions were obtained from WYDEQ for the calendar year 2011.
Controls were applied to only drilling and workover engines emissions as consistent with other basins. |
| South San Juan | xls | xlsIn Progress | 2008 WestJump survey-based emissions were projected to 2011 based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. Each source category was assigned the projection estimate for the activity category to which it was most closely associated. For example, drill rig activity would be most closely associated and therefore assigned the activity projection of new spuds. The title V permitted sources emissions were directly obtained from the New Mexico Environment Department and Part 71 sources emissions from the Environmental Protection Agency (EPA) for the calendar year 2011. Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies. |
| Uintah | xls | xls | 2008 WestJump survey-based emissions were projected to 2011 based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. Each source category was assigned the projection estimate for the activity category to which it was most closely associated. For example, future drill rig activity would be most closely associated and therefore assigned the activity projection of new spuds. The permitted sources emissions were obtained from the Uintah Department of Environmental Quality (UTDEQ) and Environmental Protection Agency (EPA) for the calendar year 2011. Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies.
Per agreement with the Three-State Air Quality Modeling Study (3SAQS) technical committee, for the Phase I oil and gas emission inventories, emission controls were applied to survey-based sources, but not for emissions provided by state agencies. |
| Wind River | xls | xls | For 2011, area source emissions were directly provided by the Wyoming Department of Environmental Quality (WYDEQ) for Non-tribal land. Area source emissions on tribal land were projected to 2011 from 2008 WestJump EI based on estimated changes in activity as well as control due to regulations. Activity data were obtained from the IHS database for the calendar year 2011. The WYDEQ emission inventory included a small fraction fraction of wells identified as being on tribal land; adjustments were made to projected tribal emissions to avoid double counting. The permitted source emissions were obtained from WYDEQ and Environmental Protection Agency (EPA).
Controls were applied to only drilling and workover engines emissions as consistent with other basins. |