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y KEI-J92-0205.R4 July 6, 1994 Page 3 County Public Health Services Department (SJCPHS) was present during tank removal and subsequent soil sampling. Ground water was encountered in the fuel tank pit at a depth of approximately 10.5 feet below grade, thus prohibiting the collec- tion of any soil samples from immediately beneath the tanks. Five soil samples, labeled SW1 through SW5 , were collected from the sidewalls of the fuel tank pit at depths ranging from 9 . 5 to 10 feet below grade. The undisturbed samples were collected from bulk material excavated by backhoe. Sample point locations are as shown on the attached Figure 2 . After soil sampling was completed, approximately 7 , 000 gallons of ground water were pumped from the fuel tank pit. on April 29, 1992 , one water sample (labeled W-1) was collected from the fuel tank pit in four clean glass VOA vials and a one-liter amber bottle. The water sample was stored and delivered as described above. Ms. Violett was present during the water sampling. Upon review of the analytical results of the soil samples collected from the sidewalls of the fuel tank pit, KEI proposed to perform . additional lateral excavation in the vicinity of sample SW2 (the southeast sidewall of the tank pit) , per KEI ' s proposal (KEI-P92- 0205 .P2) dated May 13 , 1992 . On July 30, 1992 , the proposed additional excavation of the southeast sidewall was completed (approximately 3 feet laterally) . Per the request of Mr. Harlin Knoll of the SJCPHS, four soil samples (labeled SW2-A, SW2-B, SW2-C, and SW2-D) were collected from the southeast sidewall of the additionally excavated tank pit at depths ranging from 8 . 75 to 10.75 feet below grade. The samples were also collected from bulk material excavated by backhoe and handled as previously described. Sample point locations are shown on the attached Figure 2 . The subsurface soils exposed in the excavation consisted primarily of sandy clay. On April 22 , 1992 , ground water was encountered in the tank pit at a depth of approximately 10. 5 feet below grade, and was observed at a depth of about 12 feet below grade on July 30 , 1992 .