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2000 Crow Canyon Place <br /> Suite 400; <br /> 77 San Ramon, CA 94583 <br /> .2305 <br /> fax: 925 <br /> �, .;•r ��311� fax: 925.277.236 <br /> A.. <br /> Environmental <br /> TOSCO �' >' a ? Compliance <br /> Department <br /> Marketing <br /> Company <br /> June 7, 1999 *' <br /> Mr. Scott Hooton <br /> BP Oil Company <br /> 295 SW 41"Street <br /> Building 13, Suite N <br /> Renton,Washington 98055-4931 <br /> RE: Tosca Facility#11193 <br /> 3202 West Hammer Lane <br /> Stockton,California <br /> Dear Mr.Hooton: <br /> Tosco has reviewed the first quarter 1999 Groundwater Monitoring report dated March 9, 1999 as prepared <br /> on behalf of BP Oil Company by Blaine Tech Services. We wish to document our position regarding <br /> remedial actions undertaken by Tosco at the referenced facility. <br /> • In December 1998,the underground storage tanks and product piping were replaced to remain in <br /> compliance with current operating criteria. Tosco undertook overexcavation activities in source areas <br /> of the site,including the tank pit,product piping runs and dispensers. Approximately 1,074 tons of <br /> soils were excavated and disposed offsite at an approved landfill facility. <br /> • In addition,Tosco removed 15,000 gallons of groundwater from the tank cavity and disposed the water <br /> at our S.F.Refinery in Rodeo. <br /> Based on the January 19, 1999 groundwater sampling results from site monitoring wells it appears that <br /> Tosco has adequately mitigated any potential contribution of hydrocarbon impact,including MTBE,by the <br /> aforementioned corrective actions. Current groundwater concentrations following these remedial activities <br /> are consistent with,or below,baseline. r <br /> Should you have any questions or wish to discuss this matter further,please contact me at 925-277-2335. <br /> Sincerely, <br /> David J. Ca ill <br /> Regional EC anager <br /> Tosco Marketing Company <br /> c: Robert Staab,TMC_ <br /> Carol Oz,±San_Joaquin County Public Health <br /> File: 11193/05448:5/trb - <br /> . • brawn Bear <br /> Vi Car Wash <br />