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a <br /> Che mtt .+ T- <br /> Chevron U.S.A. Inc. <br /> 241f1 Cassino Ramon,San Ramon,California Phone 15101842-9500 <br /> 114ad Addiett'P0.ea.5074•San Ramon,CA 94593 0604 _F rih s; <br /> Markv.ing 4epanment " <br /> March 24, 1992 <br /> W.Harlin Knoll <br /> San Joaquin CouAty Environmental Health <br /> P.O. Box 2009 <br /> Stockton,CA 95201 <br /> -0342 <br /> Re: 1347 S.E!rmer Dorado Street,Stockt n,CA <br /> Dear Mr.Knoll: <br /> F. Please find attached a report dated February 18, 1992, which was prepared by Chevron's <br /> describe consultant,Groundwater Technology Inc.(GTI)E oned abovea�The graduarter ient, to the northeast,monitoring <br /> iss k <br /> �rformed on January 14, 1992, at the site cap samplesbons were detected in <br /> consistent with previous li vets of dissolved hydrocarbons were detected inW from <br /> wells M�iJ-1, <br /> MW-2,and MW-4- <br /> six <br /> !e <br /> Due to the consistency of the groundwater monitoring data collected over the last six quarters,he <br /> Duet t of dissolved hydrocarbons,and the indications that groundwater is not impacted offsite,I <br /> svo3ld like to ask you to consider reducing the required frequency of groundwater monitoring. <br /> Rather than a continued quarterly frequency,I feel that an annual or semi-annual frequency would <br /> be more appropriate for this site. <br /> uarter of 1992, I've asked GTI <br /> GTI is currently scheduled to monitorthtl si f aov couic!calin tine lcme ondor send me alei <br /> ger responding to <br /> ' to not schedule this site until after May } <br /> this request before this date,then 1 will be able to instiuct GTI of your decision prior to the next <br /> scheduled monitoring event. <br /> ` Thank you for your consideration of this request. I'll took forward to hearing from you. If ytau <br /> have any questions or comments,I can be reached at(510;&12-8658. <br /> Sincerely, <br /> rs <br /> Clint B.Rog.r <br /> Engineer,Sitc.Assessment and Remediation <br /> Attachment <br /> Elisabeth Thayer,Central Valley RWQCB,Sacramento,CA <br /> Ramon Guerrero, 1327 S.Wilson Way Stockton,CA 95205 <br /> !o enclosure) <br /> Jim Grasty, GTI,West Sacramento,CA(w <br /> y*`ti_ <br />