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1 Kennedy/Jenks Consultants ' 4 FINDINGS AND CONCLUSIONS On the basis of the September 1996 soil and groundwater investigation conducted at the Site, Kennedy/Jenks presents the following findings and conclusions 41 Stanislaus Repair Facility • The Agency determined in 1993 that no further action was required following the removal of the two USTs, although greater than 300 mg/kg of petroleum hydrocarbons were left in soil • The analytical results of the soil samples collected from Borings SB-1, SB-2, and SB-7 indicate that (except for low levels of TPH as heating oil) the former automotive repair facility did not contribute significant amounts of PHCs to the subsurface • VOCs and SVOCs were not detected in soil samples collected from Bonngs SB-1, SB-2, and SB-7 Thus, it does not appear that the Stanislaus Repair Facility is a ' source of the VOCs detected in reconnaissance groundwater samples from Borings SB-8, SB-9, and SB-10 • The analytical results for the soil samples collected from Borings SB-1, SB-2, and SB-7 indicate that the Stanislaus Street Facility did not contribute to total lead concentrations detected in these borings These lead concentrations are well within the range of lead concentrations typically found in the U S or western U S soils • The analytical results for the soil sample collected from Boring SB-1, which was installed adjacent to the Stanislaus Repair Facility sump, indicate that the metals ' detected are also well within the range of concentrations typically found in the U S or western U S soils 42 American Street USTs The geophysical survey indicates that the American Street USTs are still present • The analytical results of the soil samples collected from Borings SB-4 and SB-11 indicate that, except for low levels of TPH as heating al, the American Street USTs did not contnbute significant amounts of PHCs to the subsurface ' VOCs were not detected in soil samples collected from Borings SB-4 and SB-11 Thus, it does not appear that the American Street USTs are a source of the VOCs detected in ' reconnaissance groundwater samples from Borings SB-8, SB-9, and SB-10 • The analytical results of the soil samples collected from Borings SB-4 and SB-11 indicate that the American Street USTs did not contribute to total lead concentrations detected in these borings These lead concentrations are well within the range of lead concentrations typically found in the U S or Western U S soils i%job%96t966070 Mphase eltexLQoc 9