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TABLE 2 <br /> HISTORIC RESULTS FOR SOIL SAMPLES COLLECTED DURING PREVIOUS INVESTIGATIONS-PAHs <br /> PG&E Former Tracy MGP Site <br /> Tracy,California <br /> Previous Sample Depth(feet Total PAHs <br /> Sample ID Investigation Location Matrix bgs) Sample Date <br /> mg/kg <br /> TB-28-1 SI C3 Soil 2-2.5 11/3/1988 0.470 <br /> TB-28-2 SI C3 Soil 3.5-4 11/3/1988 ND<0.060 <br /> TB-29-1 SI C2 Soil 2-2.5 11/1/1988 1.77 <br /> TB-29-2 SI C2 Soil 3.5-4 11/1/1988 ND<0.060 <br /> TB-30-2 SI D2 Soil 3.5-4 11/1/1988 ND<0.060 <br /> TB-31-1 SI E2 Soil 2-2.5 11/1/1988 ND<0.060 <br /> TB-32-1 SI A3 Soil 2-2.5 11/3/1988 ND<0.060 <br /> TB-32-2 SI A3 Soil 3.5-4 11/3/1988 ND<0.060 <br /> TB-32-4 SI A3 Soil 7.5-8 11/3/1988 ND<0.060 <br /> TB-32-5 SI A3 Soil 10.5-11 11/3/1988 ND<0.060 <br /> TB-32-6 SI A3 Soil 16-16.5 11/3/1988 ND<0.060 <br /> TB-33-1 SI C3 Soil 2-2.5 11/3/1988 0.720 <br /> TB-33-2 SI C3 Soil 3.5-4 11/3/1988 ND<0.060 <br /> TW-1-1 SI E2 Soil 2-3 10/25/1988 ND<0.060 <br /> TW-2-1 SI C1 Soil 2-2.5 10/25/1988 8.06 <br /> TW-2-2 SI C1 Soil 3.5-4.5 10/25/1988 ND<0.060 <br /> TW-3-1 SI Al Soil 2-2.5 10/26/1988 ND<0.060 <br /> = Duplicate Sample <br /> PA= Preliminary Assessment of the Former Manufactured Gas Plant Site in the City of Tracy(PG&E, December 1986) <br /> SI =Site Investigation for the Tracy Manufactured Gas Plant Site(PG&E,April 1989) <br /> PAH=Polycyclic Aromatic Hydrocarbons <br /> B(a)P=Benzo(a)pyrene <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 />