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1 <br /> CALCULATION OF GALLONS OF CONTAMINATION IN SPECIFIED VOLUME OF GROUNDWATER <br /> CLIENT The Southland Cor ortation <br /> SITE 9110 Thornton Road, Stockton, CA <br /> DATE 10/09/95 <br /> G=(A`H)"N'(X/t 01,9)'7 481 <br /> INITIAL <br /> Estimated initial dissolved mass of petroleum hydrocarbons based on 7117186 distribution <br /> Reference Figure for area delineation Area within 100,000 ppb contour estimated to average 150,000 ppb, <br /> within 10,000 contour estimated to average 30,000 ppb, and within 1,000 contour estimated to average 3,000 ppb <br /> CONTAMINANT TPH-G TPH-G TPH-G <br /> X-CONTAMINANT CONCENTRATION (ppb) = 150000 30000 3,000 <br /> N - POROSITY(0##) = 04 04 04 <br /> A- IMPACTED AREA(ft^2) = 6784 9408 27072 <br /> H - HEIGHT OF IMPACTED AREA(ft) = 5 5 5 <br /> TOTAL <br /> TPM-G <br /> G-GALLONS OF CONTAMINANT = 152 42 12 206 <br /> This value is just an estimate, actual value may range from 10 to 30 gallons <br /> CURRENT <br /> • Estimated current dissolved mass of petroleum hydrocarbons based on 9195 distribution <br /> TPH-G not detected in any wells on site (< 50 ppb), so used estimate of 25 ppb TPH-G for wells which had <br /> detectable concentrations of benzene Areas estimated based on 20 foot radius around MW-9 and 30 foot <br /> radius around MW-1 <br /> CONTAMINANT TPH-G TPH-G <br /> X- CONTAMINANT CONCENTRATION (ppb) = 25 25 <br /> N -POROSITY(0##) = 04 04 �V1_ <br /> A- IMPACTED AREA (ft"2) = 1256 2826 <br /> H - HEIGHT OF IMPACTED AREA (ft) = 10 10 <br /> TOTAL <br /> TPH-G <br /> G -GALLONS OF CONTAMINANT = 0 001 0 002 0 003 = 0 38 fluid ounces <br /> This value is just an estimate actual value rn Lane from 0 001 to 0 004_gallons <br /> (20 6120 603) = 99 99 % DISSOLVED PETROLEUM HYDROCARBONS REMOVED <br /> GROUNImtAryI <br /> LEE TI,CHNOLOGN <br />