SITE INFORMATION AND CORRESPONDENCE

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r - FROM 199e,06-10 10:04 #646 P.03/04 June 5, 1598 %owl Page 2 Response to Request for Addition*]Information The requested information on the original underground storage tanks is not available to Tosco. Infdrmation available to Tosco indicates that the original fuel tanks were removed in 1984,while the facility was operated by Mobil Oil. The site was then transferred to 13P Oil,which was subsequently acquired by Tosco. In addition to the complications resulting from the changes in ownership or operation of the subject facility, environmental reporting was not yet a common practice at the time of the 1984 tank removal activities_ For these reasons~ Tosco is unable to provide the requested information on the disposal of materials generated during the 1984 tank removal activities. A copy of the May 1, 199&report titled Soil Sampling.Results for Station flpgr , prepared for Tosco by PEG,is attached. This report documents investigative and remedial activities performed during the removal of-the more recent generation of underground fuel storage tanks,in February 1998. A copy of the,May 1, 1998 report has been reviewed by h1r.Harlin moll of the SJCEBD. In a Way 5, 1998 telephone conversation with PEG,Mr.Knoll presented the comments of the SJCEHD. The SJC.P. D noted that soil sample PD-3, collected from bweath the central product dispenser island at a depth of approximately 3 feet below ground surface fts),contained a residual concentration of 1,800 parts per million(pprn) total purgeable petroleum hydrocarbons calculated as gasoline(TPPH-9). However,the SJCEM further noted that soil sample PP-6, collected at a depth of 5 feet bgs, approximately 4 feet to the south-southeast of PD-3, did not comain detectable TPPH-g. Based on these observations,the MEED feels that the extent of TPPfY g impact in the area of soil sample PD-3 is of a limited extent. The M ERD remains strongly in support of the issuance of a letter requinng no further action. Request for Letter Requiring No Further Action PECK conows with the observations of the SJCEHD in regard to the TPPH g impact in the location of soil sample PD-3. In addition to the apparently limited extent ofTP'PH g impact in that area,PEG motes that the TPPH g concentration detected in soil sample PD-3 is not accompanied by detectable concentrations of benzene or methyl-tertiary- butylether,the primary constituents of concern with regard to the protection of drinldng water resources_ On behalf of Tosco,PEG hereby requests the issuance of a letter requesting no fiuther investigative or remedial action for the subject site_ ]111741AiC 0S FrYsoc