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Work Plan for Additional Site Assessment 2 The Southland Corporation,Store#17647, 1048W.Yosemite Ave.,Manteca,CA October 26,1999 Total lead was analyzed for using EPA method 6010. Benzene was not detected; TPH-G concentrations ranged up to 1,300 milligrams per kilogram (mg/kg) at the base of excavation and were non-detectable in the sidewall samples. Soil MTBE levels were less than 0.02 mg/kg, and soil lead levels were up to 6.1 mg/kg. The SJCEHD requested further assessment upon receipt of the tank-pull findings. On June 18, 1999, IT Corporation supervised the advancement of five GeoprobeTM points(GP-1 through GP-5)at the site (Figure 2). Using a truck-mounted hydraulic drill and direct push techniques, one discrete soil sample was collected from each of the soil borings from 15 feet below ground surface(BGS). After completion, the borings were backfilled to grade with bentonite chips(saturated in place), and sealed at grade to match the existing surrounding surface. Soil samples were selected for laboratory analysis of BTEX and TPH-G using EPA Methods 8020/modified 8015, and for MTBE, tert-butanol(TBA), di-isopropyl ether(DIPE), ethyl-tert-butyl ether(ETBE), and tert- amylmethyl ether(TAME) by EPA Method 8260. Hydrocarbon and oxygenate concentrations in all soil samples were non-detectable, with the exception of 0.026 mg/kg MTBE detected at 16 feet below grade in boring GP-3 (located at the northwest corner of the UST pit area). Grab groundwater samples were collected at the total depth of each borehole using disposable bailers, then transferred to 40-milliliter glass vials filled to zero headspace and acidified to a pH of 2. The groundwater samples were analyzed for BTEX and TPH-G using EPA Methods 8020/modified 8015, and for MTBE, TBA, DIPE, ETRE, and TAME by EPA Method 8260. The sample from goring GP-5 was also analyzed for ethylene dibromide(EDB) and 1,2-dichlorethane(1,2-DCA) by EPA method 8260. Groundwater analytical data for samples collected on June 18, 1999, are presented in Table 2. Benzene was not detected. Dissolved TPH-G was non-detectable in all locations except GP-3 (19,400 lag/L)and GP-4 (128 pg/L). Dissolved MTBE was only detected in location GP-3 (126 pg/L). Dissolved TBA, DIPE, ETBE, and TAME were not detected in any of the samples collected. Dissolved EDB and 1,2-DCA were not detected in the sample from GP-5. TASK 1: SITE-SPECIFIC HEALTH AND SAFETY PLANIPERMITTING A site-specific Health and Safety Plan has been prepared by IT Corporation as required by the Occupational Safety and Health Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response"guidelines(29 CFR 1910.120). The document will be reviewed and signed by all IT Corporation personnel and subcontractors performing work at the site. IT Corporation will conduct a technical review of the pertinent information associated with the site. Underground Service Alert(USA)will be contacted and requested to notify the local utility companies to mark the location of underground utilities surrounding the site. 17647wkp.LTR