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No <br /> a Batch Mix Hot Mix Asphalt Plant <br /> b Natural gas-fired <br /> 1.. <br /> Handling and Storage <br /> Fugitive particulate matter emissions are expected from the handling and storage of raw materials <br /> t from quarry processing. The methodology for the calculation of particulate emissions from the <br /> r, handling and storage of raw materials is described in AP-42 Section 13.2.4 for aggregate handling <br /> and storage piles. The quantity of dust emissions from aggregate handling and storage operations <br /> varies with the volume of aggregate passing through the storage cycle. The emission factor for <br /> •' the quantity of emissions per quantity of material is estimated using the following equation: <br /> U <br /> 13 <br /> [ 5 ] <br /> EF =k(0.0032) <br /> kmLMil.4 <br /> where: L <br /> EF = emission factor(lb emissions/ton material) <br /> k = particulate size multiplier(PM 10=0.35) <br /> U = mean wind speed (7.4 mph) <br /> M = material moisture content(0.7 %) <br /> Based on available data,the emission factor for handling and storage activities is 0.0052 pounds <br /> of PM 10 per ton of material processed(uncontrolled)and 0.0013 pounds of PM 10 per ton of <br /> material processed(controlled). Weather data(wind speed)from <br /> http://www.wrcc.dri.edu/summary for Stockton, California. To account for emission controls, <br /> ~ a control efficiency of 75% was applied. <br /> r <br /> Wind Erosion <br /> In addition to emissions from the handling of storage piles, EPA provides a methodology for <br /> V calculating emissions from wind erosion of storage piles as documented in AP-42 Section 13.2.5. <br /> The emission factor for wind-generated particulate emissions is dependent on the frequency of <br /> disturbance of the storage pile and is expressed in units of grams per square meter(g/m2)per <br /> year. The following equations were used to calculate the emission factor. <br /> EF=k l"t P <br /> it P,. =58(u* —u;)s + 25(u* —u,);P,. =0 for u' <—u, <br /> iw <br />