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McClelland consultantt MA , ENVIRONMENTAL, PERMIT/SERVICES" ,f March 2, 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 supplements our previous letter of February 15, 1989, which summarized the verification sampling, at the Former Tillie Lewis Foods Cannery. To summarize: o The base of the excavation generally extends down to 28 to 30-foot depth, with a local area extending further down to 35 to 38-foot depth. o Approximately 7500 to 8000 cubic yards of contaminated materials have been removed from the excavation. o The general extent and volume of contaminated soils agrees well with the anticipated extent and volume of contaminated soils, as interpreted from the site assessment data. o Soils were excavated from the sides and base of the excavation until field HNu PID measurements were less than 1 ppm. o The line of contamination in the base of much of the excavation was clearly discernible by staining of the sands. o Laboratory test results of 14 verification samples from the base of the excavation contained nondetectable amounts of gasoline, kerosene, diesel, and light motor oil using a TEPH fuel fingerprint analyses technique as requested by Mr. Gordon Boggs of the CVRWQCB. o Laboratory test results of 14 verification samples from the base of the excavation had total volatile petroleum hydrocarbons concentrations of less than 1.5 ppm using the GC/FID technique requested by Mr. Gordon Boggs of the CVRWQCB. McClelland Consultants(West),Inc. 2140 Eastman Avenue,Ventura,California 93003 (805)644-5535, FAX: (805)642-4791 A member of the Fugro-McClelland group of companies