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TABLE 7 <br /> HISTORIC RESULTS FOR WATER SAMPLES COLLECTED DURING PREVIOUS INVESTIGATIONS-PAHs <br /> PG&E Former Tracy MGP Site <br /> Tracy,California <br /> Sample ID Previous Location Sample Matrix Sample Date Total PAHs <br /> Investigation <br /> m /L <br /> OW-1 CUST A2 Water 1/11/1988 ND<0.010 <br /> OW-1 CUST A2 Water 11/18/1988 ND<0.004 <br /> OW-2 CUST A3 Water 1/11/1988 ND<0.010 <br /> OW-2* CUST A3 Water 1/11/1988 ND<0.010 <br /> OW-2 CUST A3 Water 11/23/1988 ND<0.004 <br /> OW-3 CUST B3 Water 1/11/1988 ND<0.010 <br /> OW-3 CUST B3 Water 11/21/1988 ND<0.004 <br /> OW-4 CUST A3 Water 1/11/1988 ND<0.010 <br /> OW-4 CUST A3 Water 11/21/1988 ND<0.004 <br /> OW-5 CUST A2 Water 2/26/1988 ND<0.010 <br /> OW-5 CUST A2 Water 11/18/1988 ND<0.004 <br /> OW-6 CUST A3 Water 2/26/1988 ND<0.010 <br /> OW-6 CUST A3 Water 11/21/1988 ND<0.004 <br /> TW-1 SI E2 Water 11/23/1988 ND<0.004 <br /> TW-2 SI C1 Water 11/23/1988 ND<0.004 <br /> TW-3 SI Al Water 11/23/1988 ND<0.004 <br /> TW-4 SI Al Water 11/23/1988 ND<0.004 <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 /> PAH=Polycyclic Aromatic Hydrocarbons <br /> Values in BOLD text are detected concentrations above the reporting limit <br /> ND< =Non Detect at Reporting Limit <br /> mg/L=milligrams per Liter <br /> Page 1 of 1 <br />