Laserfiche WebLink
c TABLE D-2'� Page 1 of 1 <br /> ESTIMATED TBA MASS IN GROUNDWATER(NOVEMBER 4,2011) <br /> INDEPENDENT SHELL-BRANDED SERVICE STATION <br /> 4315 WATERLOO ROAD <br /> STOCKTON,CALIFORNIA <br /> Impacted GW Impacted GW Aquifer Volume Estimated Impacted Representative TBA Total Dissolved Total Dissolved <br /> Thickness Area Aquifer GW Volume Concentration TBA Mass TBA Volume <br /> (ft) (sq-ft) (cu-ft) Porosity (gallons) (µg/1) (lb) . (gallons) Ic <br /> 1 <br /> 15.00 1,829 27,435 0.4 82,086 42 0.03 0.00 . <br /> 15.00 1,391 20,865 0.4 62,428 550.0 0.29 0.04 <br /> 15.00 629 9,435 0.4 28,230 5,500 1.30 0.20. <br /> 15.00 352 5,280 0.4 15,798 13,500.0 1.78 0.27 <br /> Total Estimated Residual TBA: 3.39 0.52 <br /> Notes: <br /> Aquifer Volume=Impacted aquifer thickness x impacted aquifer area[excludes aquifer volume of greater impact] <br /> Impacted GW Volume=Aquifer volume(cu-ft)x est.porosity(%)x 7.48(gals/cu-ft) <br /> i Total Dissolved TBA Mass=GW volume(gals)x 3.785(1/gal)x Concentration(ug/1)x 2.2051b/kg/1,000,000,000(ug/kg) <br /> Total Dissolved TBA Volume=Mass(lb)/ 6.532(lbs/gal) <br /> Approximate density of.TBA=6.532 Ib/gal <br /> Abbreviations: Soil Type: Porositv <br /> TBA= tertiary butyl alcohol Gravel 25-40 s <br /> GW=Groundwater Sand 25-50 <br /> ft=feet Silt 35-50 <br /> sq-ft=square feet Clay 40-70 <br /> cu-ft=cubic feet <br /> kg=kilograms <br /> lb=pound <br /> µg/1=micrograms per liter <br /> lb/gal=pounds per gallon From:Groundwater;Freeze&Cherry,1979,Prentice-Hall,Inc.,pg.37.(based on Davis,1969) <br /> CRA 241359(7) <br />