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SON M%Y#aWZK FM 3.0 Depth to Groundwater In January 1990, through implementing the soil investigation work plan (January 19, 1990) , the depth to groundwater beneath the former tank T2 area was found to be 47.9 . The log for the soil boring installed for the soil investigation work is included in -" Appendix A. 4.0 Site Geology and Topography Limited information is available regarding site specific lithology. Information is available in the form of a single on-site borehole log (Appendix A) . Additionally, information in the form of well "R installation logs is available from the records of the Triple "E" Produce site southeast of the Laura Scudder's facility. These logs, as presented in Appendix A, indicate the presence of sands ° and gravels which would be indicative of high permeability soils. The site topography is relatively flat at an average elevation of 1.03 feet above sea level. There are no naturally occurring streams or rivers within 2000' of the site as shown on the topography map for the site presented in Figure 2. 5.0 Tank Removal Soil Analysis and chronology Tank T-2, a 10,000 gallon diesel tank, situated within the Laura Scudder's Tracy plant (Figure 3) , was removed in 1987. At the time of the tank removal, a single soil sample was collected from native soils beneath the tank area. Analysis of the sail sample indicated the presence of Total Petroleum hydrocarbon (TPH) concentrations of 8200 mg/Kg. Based on this TPH concentration, the tank removal contractor further investigated soils in the tank area. This investigation consisted of hand augering to the depth of 19' beneath each tank end area (Figure 4) and collecting two soil samples (19N and 19S) . The results of the analysis of these soil samples are presented in Table 1. Following the receipt of these analytical results, the tank removal contractor excavated the tank removal area to a depth of 201 . Two soil samples were then -� collected from the bottom of the excavated area (1 south and 1 north) . Analysis of these samples did not indicate any residual hydrocarbon compounds. The area was then backfilled. Current attempts by Laura Scudders to obtain clean closure for the tank T--2 removal area as well as other tank removal areas at the site have resulted in the >reG%vtect_ien of concern regarding the �• soil conditions beneath this tank area. 6.0 Previous Site Investigation Work The site investigation work described in this section pertains only to . recently conducted activities. In January 1990, a single borehole was installed in the center of the former tank T2 area. This borehole extended to the first groundwater with soil samples being collected every 51 . The specifics of this borehole installa- -. 3 -