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' Geologica(Technres Inc Page 5 Sod Investigation Report Bank of Stockton Project No 443 2 June 19,1996 ' Boring Position Boring No. Pump Island B1 ' S feet W of oil supply building B2 former 2,000 gallon AST 133 4 feet N of oil suply building 134 ' 1,000 gallon gasoline UST pit B5 ' A soil sample was collected from the 5 foot level and from the bottom (10 ft ) of each of the 5 borings In the case of B-5 no 5 foot sample was collected because the material was back fill The samples were collected in 6 inch brass liners using a 2 0 ' inch diameter sampler The soil samples were sealed with alurrunum foil, capped, labeled and placed in a cooler at 4° Celsius for transport to the laboratory following Chain of Custody protocol ' 3.2 Soil Boring Sample Analyses The bottom (10 ft ) sample from each boring was selected for analysis These soil samples were relinquished to Sherwood Laboratories of Hilmar (DHS# 1400) and were tested for Total Extractable Petroleum Hydrocarbons measured as diesel I (TEPH-D) and for Total Petroleum Hydrocarbons as gasoline (TPH-G) by EPA method 8015 modified The detection linut for TPH is 1 mg/kg and for TEPH is 5 mg/kg by EPA method 8015m The samples were also tested for the presence of benzene, toluene, ethylbenzene, and xylene, (BTEX) using EPA method 8020 The detection method limits for BTEX constituents is 3 µg/kg Two of the samples were also tested for the presence of MTBE and total lead 3.3 Borehole Closure After successfully collecting the bottom hole soil samples, each borehole was closed by filling with neat cement I 3.4 Water Well - Downhole Television Survey On June 25, 1995, Valley Pump of Modesto, CA arrived on the location for the purpose of removing the downhole equipment from the 4 inch diameter domestic water well The pump motor was unbolted and removed, and then the duel tubing string was removed along with the pump It was found that the pump had been set at a depth of about 73 feet below grade I I