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Environmental Site Assessment Proposal PR89038 <br /> A. Levy & J. Zentner Co. Property May 25, 1989 <br /> Stockton, California Page 2 <br /> are performed to assess past land uses or operational practices <br /> which may have occurred at or in the vicinity of the project site <br /> that may present environmental hazards which could impact future <br /> development and/or use of the property. The historical review <br /> would be augmented by a review of historical aerial photographs <br /> of the project area. <br /> Documents would be reviewed for historical and on-going <br /> operational practices, existence of leaking surface or <br /> underground storage tanks, visual indications of possible <br /> mishandling of toxic substances (e.g. , spills or accidents, <br /> cleanup operations, etc. ) , previous testing by others, including <br /> underground tank testing data and legal actions by or against <br /> neighbors or others. <br /> Local, county and federal government agencies would also be <br /> contacted regarding any possible environmental concerns, <br /> violations, punitive actions, or information concerning potential <br /> environmental hazards at or in the immediate vicinity of the <br /> site. <br /> Phase II - Soil Sampling and Chemical Testing <br /> Following or concurrent with our Phase I investigation (provided <br /> that a timely sampling permit could be issued by the San Joaquin <br /> County Environmental Health District) , a program of field <br /> exploration and analytical testing would be performed. Sub- <br /> surface soil sampling would be confined to the underground tank <br /> area and a surface sampling of the adjacent unpaved storage area. <br /> We plan to drill a total of three borings to a 15-foot depth, one <br /> boring adjacent to each tank. These borings would be drilled as <br /> much as possible at an angle in order to obtain soil samples at <br /> tank bottom level and five feet below. In the storage area, two <br /> soil samples would be obtained from the top three feet. <br /> The test borings would be drilled with a truck-mounted continuous <br /> auger drill rig. Prior to drilling, we request that plans be <br /> provided to us that clearly and accurately show existing <br /> underground utilities or structures. We will not be responsible <br /> for damage to underground improvements not accurately shown on <br /> these plans. <br /> The rig would be equipped with 8" hollow stem augers. The augers <br /> act as continuously advancing steel casings preventing test holes <br /> from caving in above the levels to be sampled. The samples would <br /> be obtained by lowering a 2" inside diameter split-spoon sampler, <br /> containing three stainless steel liners inside the hollow stem <br /> auger, and driving it into undisturbed soils. <br /> BSK <br /> 'Vm)( .ir <br />