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(6.4 acres)(I.2 tons/acre/month)(1 month/30 days)(2000 lb/ton)(.50) = 256 lbs/day TSP <br /> (256 lb/day * 150 days/yenr * 1 ton/2000 lb= 19.2 tonslyear TSP <br /> Assume that the PMl0 content of the dust emissions is 509 (conservative since no soil silt data): <br /> 50% * 256 lbs/day— 128 lbs/day PM 10 <br /> 50% * 19.2 tons/year=9.6 tons/year PM10 <br /> D. FUGPTVE DUST FROM STORAGE PILES <br /> PM 10 Emission Factors from AP-42, Section 8.19.1 (Sand and Gravel Processing): <br /> Active Day/a/: 6.3 Ib/acre/day <br /> Inactive day lbl: 1.7 lblacro/dny <br /> /at: Includes the following distinct source operations in the storage cycle: (1) loading of aggregate ontop <br /> storage piles (batch or continuous drop operations), (2)equipment traffic in storage areas, (3)wind erosion <br /> Of pile (batch of continuous drop operations). Assumes 8 to 12 hours of activity/24 hours. <br /> lb/: Wind erosion only. <br /> There will be no storage piles at the extraction site. <br /> The processing site will have 4 to 5 acres of active stroage piles, depending on season and production. <br /> 4.5 acres *6.3 lblacre/dny * 150 days =4725 lblday PM-10 <br /> 4 acres * 1.7 Ib/acre/dny *215 days = 1462 lb/day <br />