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McClelland consultants T" February 15, 1989 Project No, 09-01-1308 Ogden Environmental Services 10955 John Jay Hopkins Drive San Diego, CA 92121 Attention: William S. Rickman Verification Sampling Results Former Tillie Lewis Site Remediation Stockton, California This letter summarizes the verification sampling, at the Former Tillie Lewis Foods Cannery. Prior to verification sampling, the excavation was taken down a depth of about 28 to 30 feet. Locally beneath the north end of the fuel tank, the contamination extended deeper and the excavation was carried to about 35 to 38-foot depth. The lateral extent and bottom depth of the excavation were determined using a HNu, Photo Ionization Detector. Materials from areas where the HNu readings were 1 ppm or higher, were removed and hauled to the contami- nated soil stockpile. Based on the February 7, 1989 survey of the contaminated soil stockpile, together with the volumes of soil treated to that date, the total volume of contaminated soils was about 7500 to 8000 cubic yards. The verification sampling plan is shown in Plate 1. Verification samples were obtained at 30-foot spacing in accordance with the site assessment plan, which previously was approved by the Central Valley Regional Water Quality Control Board and the San Joaquin Local Health District in March, 1988. Verifi- cation soil samples were obtained on Wednesday, February 8, 1989 in the presence of Gordon Boggs, of the Central Valley RWQCB, and Diane Hinson, of the San Joaquin Local Health District, who indicated their concurrence with sampling protocol. The samples were refrigerated and transported to Canonie Laboratory in Stockton, California that afternoon, using approved chain-of-custody procedures. The samples were analyzed fors 1) total petroleum hydrocarbons using a fuel fingerprint, using a EPA 3550 extraction and a "guidelines for addressing fuel leaks" analyses) , and 2) total volatile petroleum hydrocarbons (TVPH) using a EPA 5030 extraction and EPA 8015 analyses. These analyses were chosen by Mr. Gordon Boggs. The samples were analyzed using approved QA/QC protocol, with blanks and spikes. Results of the chemical analysis are provided on Plate 2. A copy of the laboratory report including complete GC scans and QA/QC reports are appended. McClelland Corlsuilanls JYMM),Inc. 2140 Eastman Avenuo,Venture.Coliforms 9300:1 (tlW1UF�-bb'sb, hAX ItlUbltl92-4/91 A memyer 011"e Fugro-McClelland group of companies