SITE INFORMATION AND CORRESPONDENCE

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y %no, Chaney,Walton&MCCA (LLC) Chronology of UST Operation by VFO According to PHS/EHD records, integrity tank tests were performed annually as required. The pre-acquisition testing results indicated that the results were within the NFPA 329 Guidelines, and that the UST system was considered "tight". The following is a brief summary of the available PHS/EHD records, which relate directly to the UST removal in November 1991 and its former operation: • Laboratory analysis results of collected soil samples were issued on December 4, 1991 from a California certified testing facility for distribution to VFO and PHS/EHD. • The Underground Tank Disposition Tracking Record indicated that the tank was received for final destruction on November 25, 1991. • Regarding the backfilling practices, according to Mr. Thorpe of Jim Thorpe Oil, Inc., the UST removal contractor,their typical procedure was to backfill a portion of the tank excavation with clean pea-gravel, and to emplace a portion of the stockpiled soili� on top of the pea-gravel to grade. He noted that there was nothing atypical about the Site UST removal, nor did he recall any indication of a release at the Site. �E , • The UST was removed on November 12, 1991. The removal was witnessed by a PHS/EHD representative, Dole Fresh Fruit Company representatives, a laboratory sampling technician, and the tank removal contractor. Two soil samples were collected, which was the minimum number of samples for a UST of that particular size. One sample was collected from the base of the excavation, and a second sample was collected from the stockpile of excavated soil. No unusual remarks or indications/ of a possible gasoline petroleum hydrocarbon release were found in the PHS/EHD t?t°� records. • An Application for UST Closure Permit is submitted to PHS/EHD by VFO on October 21, 1991. The Closure Plan is approved by San Joaquin County staff on October 31, 1991. • Integrity tank testing for VFO was performed on October 25, 1990. The UST system passed and was tight. • Integrity tank testing for VFO was performed on October 18, 1989. The UST system passed and was tight. • Integrity tank testing for VFO was performed on October 31, 1988. The UST system passed and was tight. • Integrity tank testing for VFO was performed on October 28, 1987. The UST system passed and was tight. • First inspection by PHS/EHD for VFO was December 5, 1985 to confirm the required monitoring alternatives for the UST system. Included within the files for the former UST were the PHS/EHD Worksheets for Site Closure Evaluation, dated November 8, 1991: It appears that the Worksheets were completed following the receipt of laboratory analysis results. As indicated above, the laboratory analytical results were issued by FGL Environmental Analytical Chemists Laboratory, a California certified facility on December 4, 1991_ DFI00101.S1CPH.1et.101599 2 530.758.8128 v/f rccgroup@earth ink net