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ADDENDUM 2 TO REPORT OF CORRECTIVE ACTION AND RECOMMENDATION FOR SITE CLOSURE (May 25, 2001) <br /> Caluclation Mass TPHg and Benzene Dissolved in Groundwater(Remaining) <br /> (Concentrations of Toluene, Ethylbenzene, Xylenes are below drinking water MCLs) <br /> I <br /> 151 S Main Street, California, CA <br /> 1 2 3 4 5 6 7 8 9 <br /> height radius area volume water water ^(Cone) grams pounds <br /> Contaminant (feet) (feet) (sq ft) (cu ft) porosity (cu ft) liters (ug/L) <br /> TPHg 20 25 1963 39270 025 9817 278031 3900 1084 2 388 <br /> Benzene 20 25 1963 39270 025 9817 278031 61 17 0 037 <br /> TPHg Total petroleum hydrocarbons as gasoline <br /> col 1 height assumed vertical dimension of impacted groundwater column <br /> col 2 radius derived based upon one half the average distance from imacted well <br /> BEI-MW3 to the surrounding non-detect wells <br /> col 3 area calucalted from radius X pi <br /> col 4 volume area * height (col 3 X col 1) <br /> col 5 porosity fraction of volume that is pore space (void) <br /> col 6 water volume of water in cu ft in the impacted column (col 4 X col 5) <br /> col 7 water volume of water in liters (col 6 *28 32) <br /> col 8 concentration of dissolved contaminant in micrograms per liter(latest monitoring event, 11115101) <br /> col 9 Total grams of dissolved contaminant(col 7 X col 8/ 1,000,000) <br /> col 10 Total pounds of dissolved contaminant(col 9/454) <br /> I <br />