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National Emissions Inventory Data (2014)
<br /> As previously stated, air quality is generally a function of air pollutants emissions loading within
<br /> any particular region. With respect to KFO counties (Grand, Jackson, Larimer and Summit in
<br /> north-central Colorado), the following emissions inventory summaries are provided to describe
<br /> the affected environment in terms of current cumulative emissions intensities. These annual
<br /> emissions rate totals account for agriculture, biogenics, bulk gas terminals, commercial cooking,
<br /> dust, fires, fuel combustion, gas stations, industrial processes, mobile, solvent, waste disposal
<br /> and miscellaneous related emissions sources/activities.
<br /> Table 4. 2014 County NEI Data in tons
<br /> Pollutants(TPY)
<br /> County PM10* PM2.5* VOC CO NOX 502 CO2 CH4 N20
<br /> Grand 3,661.31 792.65 14,620.95 8,549.91 1,643.22 68.79 201,317.86 138.96 3.15
<br /> Jackson 1,259.49 421.37 12,849.63 6,013.32 572.88 24.02 75,210.90 125.27 0.44
<br /> La ri nn e r 11,569.00 2,365.83 30,916.24 47,129.17 8,500.49 1,067.78 1,841,298.40 323.36 68.01
<br /> Summit 1,509.52 303.37 5,702.16 7,141.44 1,476.74 14.39 360,996.01 46.05 6.83
<br /> *filterable and condensable
<br /> 5.2.2. Environmental Consequences - Proposed Action
<br /> In general, the proposed action will have a temporary negative impact to air quality which will
<br /> occur during surface disturbing and material processing events when persistent dry weather
<br /> conditions exist. Utilization of unpaved access roads, surface disturbances and material
<br /> processing activities will all impact air quality through the generation of particulate matter(PM).
<br /> These activities will also produce short term emissions of criteria, hazardous, and greenhouse gas
<br /> pollutants from vehicle and equipment exhausts although dust/PM would be the primary
<br /> pollutants of concern for activities associated with the proposed action. Once extraction/mining
<br /> is complete for a particular sub-area within the entire project area, the daily activities at a mined
<br /> area would be reduced to reclamation and management which would occur for a short time once
<br /> mining/extraction is complete. During reclamation (if applicable), emissions would result from
<br /> vehicle exhausts and fugitive dust from unpaved roads during site visits. In addition, wind
<br /> erosion related emissions could occur for any disturbed area prior to reclamation/revegetation.
<br /> Ozone is not directly emitted like other criteria pollutants. Rather, ozone formation is complex,
<br /> and generally results from the photochemical reaction of significant quantities of VOCs and NOx
<br /> emissions from various sources within a region, and has the potential to be transported across
<br /> long ranges. Increased regional ozone formation has been shown to be associated with large
<br /> episodic wildfire events, where smoke is transported large distances to increase ozone formation
<br /> at various down-wind distances. In addition to ozone formation, dust from surface disturbing
<br /> activities consists of various particulate matter components that can elevate PM2 5 and PMio in
<br /> human populated areas, and impair visibility at parks, wildernesses and other areas. As described
<br /> for the Proposed Action, Jackson County(project proponent) is requesting to remove a total of
<br /> 130,000 cubic yards of useful materials over the next ten years, with approximately 13,000 cubic
<br /> yards of material removed per year. Using this information along with a BLM emissions
<br /> inventory tool, approximately—45 tons of PMIo and— 5 tons of PM2 5(estimates account for
<br /> extraction, processing/crushing and unpaved road traffic) could be emitted annually. These PM
<br /> DOI-BLM-CO-N020-2017-0003 20
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