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��: :::::: Wright. "' Environmental Project No.. 4 4131-T June 21, 1Services, Inc. 1 O'Neill Investigative Services 226 Paso Nogal Pleasant Hill, CA 94523 Attention: Mr. Wilfred O'Neill Subject: Kings Island, San Joaquin County, California Underground Storage Tank Disposal and Sample Collection Dear Mr. O'Neill: Wright Environmental Services, Inc. (Wright) has prepared this letter report on behalf of the administration of the Naomie King Living Trust dated June 7, 1990 (Trust) regarding the above referenced work. Wright became involved with this project to prepare underground storage tank (UST) closure permits, collect soil samples, and prepare a letter report to the overseeing agency, the San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD). This letter report consolidates and presents documents previously provided to PHS-EHD for the disposition of the tank and piping, results of soil and reconnaissance sampling, and stockpiled soil at the site. In addition this report presents the findings and recommendations of the technical evaluation of collected data. BACKGROUND The site is located on Kings Island in San Joaquin County with a mailing address at 21334 West State Route 4, Stockton, California. During the first week of November, 1995, Wright was approached by the Trust administrator to investigate a suspected tank. Mr. Lester Messina of Wright met with Mr. Harry Elliot, a representative of the Trust, at the island and observed a small hand pump next to the fence under a covered parking structure ( See figure 1 and 2). In addition, a small pipe was located approximately 2 feet from the pump at or just below the ground surface towards the center of the structure. After some discussion of the variable uses being offered and potential sizes of the suspected tank the estate representative was informed he would be contacted about his options. The actual existence of, and or the last use of the suspected tank was not known to representatives of the Trust or Wright who relied'on third party information (tenants) as the property owners were deceased. After some discussion Wright informed Trust representatives that should an underground fuel storage tank be located, and found to be leaking, that appropriate permits and procedures would have to be followed for tank closure and study as needed. Wright explained in a telephone conversation several approaches and options available (magnetic anomaly detector, probing, hand digging, excavation) to determine if there was a steel tank buried in the soil under the parking structure. In addition, it was explained that depending on the past uses of the tank and its actual size, certain exemptions at the federal, state and local level may be allowed. Representatives of the estate decided to allow a tenant of the island who would be doing other repair and maintenance work on November 10, 1995 at the island to utilize equipment to "scratch around" the area. 4220 Commercial Dr. #5 • Tracy,California 95376 �y Telephone(209)833-0758 • Fax(209)832-5152 �il�