Laserfiche WebLink
• �� TABLE <br /> CONTAMINANT MASS CALCULATIONS <br /> RESIDUAL SOIL AND GROUNDWATER CONTAMINATION <br /> • 612 W. 11th STREET, TRACY, CA <br /> CONTAMINANT MASS CALCULATIONS <br /> Souza <br /> Mass in soil. <br /> Based on estimated extent shown on attached figures <br /> Values derived from samples collected by Ground Zero <br /> mass = (Volume of impacted zone)(soil density)(Average Concentration)(E-6), �} <br /> Volume in cu ft , thickness of impacted zone is aprox 5 ft <br /> Soil density assumed 45 5 kg/cu ft (100lb/cu ft), <br /> Average concentration derived from all results within or bordering zone <br /> Area Volume Average Mass Of Dass o1 <br /> Contaminant-, Ooncentratlon Contaminant Contaminant <br /> {sq.flt.) (cu.ft�) <br /> 10-12 5' Depth 8401 21001 1751 17 37 <br /> 12 5-15' Depth 6901 1725 8651 68 149 <br /> Total mass of TPHG in Soil = 85 186 <br /> ,Average Concentration of TPHG in Soil (mg/kg) = 486 <br /> The concentrations of BTEX constituents were generally ND to very low, their mass is negligable <br /> contmass^soil^gw As <br />