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Com' r-'' r-` [-'' r77 [-!' r-7 r- r', ,� --' �-' r--�. �-, �-► �--' �-,. r-7 <br /> Table 4: Mass Balance Calculations(TPH-G) r <br /> City 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 0-25 25 3407 77885 110 0.4536 1,154 0.000001 4485 <br /> #2 sand&silt 25-50 25 2248 56200 110 0.4536 1.333 0.000001 3.7 <br /> #3 sand 50-65 15 2958 44370 120 0.4536 0.5 0.000001 1.2 <br /> C <br /> matrix area* volume vol of H2O*** vol H2O cont.load**** cont.load cont. <br /> zone type depth-ft thickness (ft.) ft3 ft3 liters mg/L kg/L kg <br /> ,water 62-89 27 - 4896 132192 39658 1122976 1.705 0.000001705 1.91 <br /> total kg= 4491.5 <br /> Ib= 9903.7 <br /> gal= 1597.4 <br /> Notes: <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 <br /> ****average zone concentration <br /> z <br /> ovrvzool <br />