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A-2 .Soil Vapor Extraaysiem Emission Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Boulevard,Tracy,California <br /> TPH as Gasoline Benzene <br /> Effluent Effluent <br /> Hour Meter Blower Average Concen Emission Destruction Concen- Emission Destruction Is System <br /> Sample Date Reading Vacuum Flow Rate tration Rate Efficiency tration Rate Efficiency In Compliance <br /> ID Sampled (hours) ("H20) (scim) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) with AQMD <br /> scfm =Standard cubic feet per minute ND =Not detected <br /> ppmv =Parts per million by volume a =Prior to April 1998 data was collected and reported by Brown and Caldwell <br /> lbs =Pounds b =TPH g and benzene concentrations reported as ND are taken as 0 ppmv for calculation purposes <br /> =Not applicable or not analyzed c =system effluent from field FID readings <br /> TPH = Total purgeable hydrocarbons AQMD =Air Quality Management District <br /> "H,0 =Inches of water <br /> i <br /> ARCO/2093/0&M/2093 0&M Tables3Q03 As <br /> Page 3 of 3 <br />