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iFi M a 1998 06-1i lxtss #686 P.03J04 <br /> June 11, 1998 <br /> Page 2 <br /> Response to Request for Additional Informatlen <br /> Errors in previous documents have created Cortfimion regarding the nw-fiber of <br /> generations of fuel tanks used at the subject site. In a December 22, 19997 Work Plwa.far <br /> Underground Storage Tank Replacement,PEG reported that the facility included three <br /> 10,000-gallon fuel tanks and one 12,000-gallon fuel tank. 'Phis statement was is error at <br /> the time of the December 22, 1997 document. In a May 1, 1998 document titled Soil <br /> Sampling Rosuftsfar Slution Upgrae,PEG reported that four 14,000-gallon fuel tanks <br /> were removed from the subject site. That statement was also in error. <br /> At present, exactly two generations of-underground fuel storage tanks have been used at <br /> the subject site. The first generation of underground fuel storage tanks included two <br /> 6,000-gallon fuel tanks, one 14,000-gallon fuel tank, and one 12~000-gallon fuel tank. <br /> These fuel tanks were installed in 1984 by Mobil Oil during the construction of the <br /> facility. The tanks were removed on February 4, 1998, during tank replacement <br /> activities performed by Tosco_ <br /> The second generation of-underground fuel storage tanks was installed following the <br /> II. February 1998 removal of the first generation of fuel storage tanks. The second <br /> generation of fuel tanks includes three 10,000-gallon fuel tanksy and one 12,000-gallon <br /> fuel tank,which remain in service at present. <br /> In response to the January 15, 19981-WQCB request for additional information,the <br /> t oril''nal underground a tanks were removed from the site in February, 1998, as <br /> � storage <br /> described above. Details of the investigation performed during the February, 1998 tank <br /> removal activities were described in the attached May 1, 1998 document titled Sail <br /> &wplingResulrs for Stauon Upgrade. The May 1, 1998 report includes erroneous <br /> statements regarding the capacities of the removed fuel tanks. However,the remaining <br /> information presented within the May 1, 1998 report is considered valid_ PEG <br /> anticipates that'the information presented within the May 1, 1998 report with satisfy the <br /> January is, 1998 RWQCB request for additional information. <br />` Request for Letter Requiring No Further Action <br /> A copy of the May 1, 1998 report titled Soil Sampling Results for Station UPfflude has <br /> been reviewed by Mr.Harlin Knoll of the SJ _ In a May 5, 1998 telephone <br /> conversation with PEG,Mr_ Knoll presented the comments of the SJCEHD. The <br /> SJCP.BD noted that soil sample PD-3,collected from beneath the central product <br /> dispenser island at a depth of approximately 3 feet below ground surface(bgs), <br /> contained a residual concentration of 1,804 parts per million(ppm)total purgeable <br /> hydrocarbons calculated as gasoline TPPH . However,the SJ HD <br /> petroleum $a ( g) <br /> p Y <br /> further noted that soil sample PP-6, collected at a depth of 5 feet bgs, approximately <br /> 4 feet to the south-southeast of PD-3, did not contain a detectable concentration of <br /> 3111741AIC1.O8.LET.DOC <br />