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Table 8: 2005 Contaminant Mass Estimate Calculations(TPH-G) <br /> of Escalon-Former Arco Mini Mart <br /> 1305 Escalon Avenue <br /> Project No.750.2 <br /> matrix area* volume density** conv. cont.load conv. cont. <br /> zone type depth-ft thickness (ft.) ft3 lbs/ft3 lbs/kg mg/kg mg/kg kg <br /> #1 sand&silt 10 to 25 15 160 400 110 0.4536 1,200 0.000001 24 <br /> #2 sand&silt 15 to 25 10 250 1900 110 0.4536 800 0.000001 76 <br /> #3 sand&silt 20 to 25 5 600 2900 110 0.4536 400 0.000001 58 <br /> total kg= 158 <br /> Ib= 348 <br /> gal= 56 <br /> *=Area calculated by CAD software. Excavation volume of 270 cubic yards of soil subtracted from Zone 1. <br /> "=estimated from Watson and Burnett, 1995 <br /> Vol.H2O=volume of zone x porosity(30%) <br /> yu,y ar4mAvicryrc 5/6/2005 <br />