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r %MOO, %FW <br /> 1.0 Introduction <br /> IT Corporation has prepared this work plan on behalf of Pacific Gas and Electric Company <br /> (PG&E)to address excavation and sampling of soil in which total petroleum hydrocarbons <br /> r (TPH) were detected during upgrading of product delivery lines and dispensers at the PG&E <br /> Service Center, 4040 West Lane, Stockton, California. The purpose of this work plan is <br /> document the procedures that will be used to delineate, excavate and dispose of TPH affected <br /> soils. <br /> PG&E is in the process of upgrading product delivery lines and dispensers on the site. Piping <br /> was removed under a closure plan approved by San Joaquin County Public Health Services, <br /> Environmental Health Division. Under the closure plan, one soil sample was collected every <br /> 20 linear feet beneath the former product lines, one soil sample was collected beneath each of the <br /> former dispensers and two composite samples were collected from stockpiled soils from the <br /> piping excavations (Figure 1). The soil samples were submitted to a state-certified analytical <br /> laboratory(Twinning Laboratory)for analyses of total petroleum hydrocarbons as gasoline and <br /> diesel (TPHG and TPHD, respectively)using U.S. Environmental Protection Agency (USEPA) <br /> Modified Methods 8015; benzene,toluene, ethylbenzene, and total xylenes (BTEX) using <br /> USEPA Method 8020; methyl tert butyl ether(MTBE) using USEPA Method 8260; <br /> Polychlorinated biphenyls (PCBs)by USEPA Method 8082; Oil and Grease; and total lead using <br /> USEPA Method 7420. The preliminary sample results are provided in Table 1. <br /> Table 'I <br /> Preliminary Sample Results <br /> PG&E Stockton Service Center <br /> 4040 West Lane, Stockton, California <br /> V <br /> Sample ID Results in Milligrams per Kilogram(mg/kg) <br /> and Depth <br /> (feet) Benzene Toluene Ethyl- Xylenes MTBE TPH-G TPH-D TRPH PCB Lead <br /> Benzene <br /> DS1-3 ND ND ND ND ND ND ND ND ND 25 <br /> V <br /> DS2-3 ND 0.017 0.031 0.18 ND 1.4 67 310 ND 27 <br /> DS3-3 ND ND 0.041 0.16 ND 450 7,000 2,200 ND 10 <br /> SS1-4 ND ND ND ND ND ND ND ND ND 5.7 <br /> SacDP-IVSICRFPIVCOMMOMConst ifingWalalSk-edlP-ject.;P17V7780D7.ds.doc 1-1 <br /> 12111100 <br />