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Based on: <br />1) CDPHE worst case emissions estimates derived from the applicant's APEN filing and <br />2) Relatively low emissions of CAAQS criteria pollutants, specifically dust (PM10), NOx, <br />and CO, below State of Colorado air quality new source thresholds the direct and indirect <br />adverse impacts to air quality and people from the proposed action to permit the mine are <br />considered long -term (for purposes of this NEPA review short-term is considered < 1 -yr, <br />medium term 1 -5 yrs, and long -term > 5yrs) but moderate to immediate homeowners and <br />people recreating in the adjacent recreation area (if mitigation is not implemented), long- <br />term and minor to Park County, and long -term but negligible to Colorado and Class I areas. <br />Cumulative Impacts: New air pollutant emissions resulting from a Proposed Destiny Mine in <br />Park County would be cumulative to emissions from the other 546 point sources existing in <br />Colorado and seven sources in Park County (http: / /www.epa.gov /air /data /reports.html). <br />Emissions from the new source will augment total emissions of CAAQS criteria air pollutants <br />in Park County and Colorado but are unlikely to be noticeable on a statewide basis relative to <br />other sources. Dust generation from Destiny Mine (sand and gravel portion of the operation) <br />truck traffic would be cumulative to homeowner, recreational, and other traffic along the un- <br />paved stretch of Big Thompson Park Road. As in direct and indirect impacts, cumulative <br />impacts to air quality resulting from a Proposed Destiny Mine are dependent on mitigation and <br />considered long -term but moderate to immediate for homeowners and nearby recreational <br />users, long -term and minor to Park County, and long -term but negligible to Colorado and Class <br />I areas. <br />Mitigation/Residual Effects: Clean air is a vital resource to human health and happiness. <br />Reviewer recommended mitigations to reduce adverse air quality impacts and minimize dust <br />and emission drift off of BLM administered lands would result from permitting the Fairplay <br />Destiny Placer Mine are: <br />1. Wet - processing of material to reduce fugitive dust to neighboring property owners. <br />2. Utilize standards for stationary diesel engines and use of low- sulphur diesel fuel in the <br />generator, as per CDPHE guidelines. <br />3. Installation of a wind sock to monitor wind conditions and dust movement to nearby <br />housing. <br />4. Cooperative curtailment of mining operations if dust stagnates over neighboring <br />subdivisions. <br />5. Daily summer application of water to exposed road surface to suppress dust. <br />6. Promotion of car - pooling to reduce dust generation from mine staff vehicle traffic. <br />7. Mine material movement scheduling to reduce total fugitive dust generation from the <br />operation <br />8. Scheduled neighbor communication to reduce impacted homeowner and recreation <br />exposure to fugitive dust generated by the mining activity on public land, as needed. <br />9. A short-term recommended off -site mitigation is mine applicant cooperative dust <br />suppression techniques on un- surfaced county administered access roads (ie, water, <br />MgC1 or other) <br />10. It is recommended that mine operations and vehicle -truck traffic be restricted to <br />operations during Monday- Friday, from 8am -5pm. <br />17 <br />