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San Joaquin Local Health District Re: Site assessment report 2e tember 28_L 1989_- Page 2 of-4— 260 S. Main Street, Manteca, CA 3. A. Groundwater depth: The groundwater depth in that area is 20 to 25 feet, B. Soil removed The soil removed was returned to the hole as no smell or discoloration was noted upon tank removal. C. Excavation history: On November 9, 1988, Jim Thorpe Oil, Inc. removed one 2,000 gallon underground regular gasoline fuel tank. Two sail samples were taken, one from the east end of the excavation and one from the west end at a depth of ten feet. Please see enclosed soil sample results from Canonie Environmental, Laboratory Report numbers 85-452-5551 and i i 85-052-5586, both date November 22, 1988, marked "B" and "C". The J sample from the east end showed "None Detected" for all petroleum ' constituants. However, the sample from the west end showed 77. mg/k9 i for Total Extractable Petroleum Hydrocarbons and "None Detected" on ` all other petroleum constituants. i 4. A. Laboratory that collected the soil samples was Canonie Environmental, 212 Frank West Circle, Suite A, Stockton, CA 95206, (20) 983-1340, by brass tube from the teeth of the hoe bucket. A copy of a signed ` "Release of Information Authorization"is enclosed, 5. A. Re-excavation and risample steps: On August 1, 1989, Jim Thorpe Oil, Inc. re-excavated the west end of the original excavation with a backhoe to a depth of 14 feet. See drawings marked "1" and "2". The hole was approximately eight feet r wide by eight feet long, equaling 64 square feet. The original sample, at the time of tank removal, was taken at a depth of ten feet. Four --- ---- - - ---- ---------sidewal-l-samples--were--collected-at--this....ten_f.oat._depth._and_._one bottom __ sample From 14 feet. All samples were taken by Canonie Environmental