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TABLE 3 <br /> HISTORIC RESULTS FOR SOIL SAMPLES COLLECTED DURING PREVIOUS INVESTIGATIONS-TPH <br /> PG&E Former Tracy MGP Site <br /> Tracy,California <br /> 6 0 <br /> x x E <br /> Previous Sample Depth Sample a a = <br /> Sample ID Investigation Location Matrix (feet bgs) Date F- F <br /> mg/kg mg/kg mg/kg <br /> TB-21-3 SI E1 Soil 4.5-5 11/1/1988 NA NA NA <br /> TB-21-4 SI E1 Soil 7.5-8 11/1/1988 NA NA NA <br /> TB-22-1 SI E2 Soil 2-2.5 10/31/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-22-4 SI E2 Soil 7.5-8 10/31/1988 NA NA NA <br /> TB-24-1 SI E3 Soil 3-3.5 10/31/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-24-3 SI E3 Soil 7.5-8 10/31/1988 ND<10.0 ND<10.0 180 <br /> TB-24-4 SI E3 Soil 10.5-11 10/31/1988 ND<10.0 790 4750 <br /> TB-25-1 SI D3 Soil 2-2.5 11/1/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-26-1 SI D3 Soil 2-2.5 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-26-2 SI D3 Soil 5-5.5 11/3/1988 NA NA NA <br /> TB-27-1 SI C3 Soil 2-2.5 11/2/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-28-1 SI C3 Soil 2-2.5 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-28-2 SI C3 Soil 3.5-4 11/3/1988 NA NA NA <br /> TB-29-1 SI C2 Soil 2-2.5 11/1/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-29-2 SI C2 Soil 3.5-4 11/1/1988 NA NA NA <br /> TB-30-2 SI D2 Soil 3.5-4 11/1/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-31-1 SI E2 Soil 2-2.5 11/1/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-32-1 SI A3 Soil 2-2.5 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-32-2 SI A3 Soil 3.5-4 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-32-4 SI A3 Soil 7.5-8 11/3/1988 20.0 ND<10.0 ND<10.0 <br /> TB-32-5 SI A3 Soil 10.5-11 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-32-6 SI A3 Soil 16-16.5 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-33-1 SI C3 Soil 2-2.5 11/3/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TB-33-2 SI C3 Soil 3.5-4 11/3/1988 NA NA NA <br /> TW-1-1 SI E2 Soil 2-3 10/25/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TW-2-1 SI C1 Soil 2-2.5 10/25/1988 ND<10.0 ND<10.0 ND<10.0 <br /> TW-2-2 SI C1 Soil 3.5-4.5 10/25/1988 NA NA NA <br /> TW-3-1 SI Al Soil 2-2.5 10/26/1988 ND<10.0 ND<10.0 ND<10.0 <br /> = Duplicate Sample <br /> CUST=Characterization of the Tracy Service Center Underground Storage Tank,(PG&E,June 27, 1988) <br /> SI=Site Investigation for the Tracy Manufactured Gas Plant Site(PG&E,April 1989) <br /> TPH-g=Total Petroleum Hydrocarbons as Gasoline <br /> TPH-d=Total Petroleum Hydrocarbons as Diesel <br /> TPH-mo=Total Petroleum Hydrocarbons as Motor Oil <br /> Values in BOLD text are detected concentrations above the reporting limit <br /> NA=Not Analyzed <br /> ND< =Non Detect at Reporting Limit <br /> mg/kg=milligrams per kilogram <br /> Page 2 of 2 <br />