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FEB.19.2003 4:51PM EXXON CO. USA N0.181 P.22 <br /> EzzonMobil <br /> Refining & Supply Company Darin L.Rouse <br /> Global Remediation 7enitory Manager <br /> 2390 a2ylon Road.8ulte 1250 Global Remediation—U.S.Retail <br /> Concord.CA 94529 <br /> (925)2468788 Telephone <br /> (925)248.8798 Facsimile <br /> dann.l.m use@elaonmobd.com <br /> E�onMobil <br /> Refining & Supply <br /> February 18,2003 <br /> Mr.Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, Third Floor <br /> Stockton,California 95202 <br /> Subject: Former Exxon RAS#7-3942,4444 North Pershing Avenue,Stockton,California <br /> Dear Mr, Knoll: <br /> This letter is written in response to a letter from the Environmental Health Department, San Joaquin <br /> County (EHDSJC) to Exxon-Mobil dated January 27, 2003 (received February 5, 2003), which <br /> requested a work plan submitted by February 24, 2003 to (1) assess the vertical extent of hydrocarbon- <br /> impacted groundwater and (2) provide remedial alternatives for hydrocarbon-impacted groundwater. <br /> ExxonMobil requests a work plan due date extension to March 10, 2003, as we are currently <br /> performing groundwater modeling exercises to determine if it is possible to lower the groundwater table <br /> such that the liquid-pbase hydrocarbons entrapped in submerged fine-grained soils can be exposed for <br /> remediation with dual-phase extraction, along with assessing if the storm drain or sanitary sewer <br /> systems can accommodate the required extraction rates, Additionally, we are looking into the <br /> applicability of a modified Fenton's Reagent at the site while maintaining appropriate health and safety <br /> concerns, If you have any questions or comments,please contact meat(925)246-8768. <br /> Sincere , <br /> Dai L. se <br /> Terr tory Manager «., <br /> C: w/attachment: <br /> Ms.Diane FXappi-SAWN <br /> Mr.Marry Hartzell-Califon a Regional Water Quali� �$I <br /> Ms.Brooke Birkie ,^ ' 'r w <br /> c: w/o auaclm�ent: <br /> Mr.Joseph Muehleck-E77C Engineering,Inc. Date _ <br /> WIN <br /> APPrwat�axar��NI�INMMMIfM �11 M <br /> deviatinr frnm requirements of steie IwN 0r-IOC OfIN11NIps. <br />