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1� SECOR vvww secor corn <br /> INTERNATIONAL <br /> S E C ® R INCORPORATED 3017 Kilgore Road,Suite 100 <br /> Rancho Cordova CA 95670 <br /> 916 861 0400 rex <br /> 916 861 0430 FAx <br /> 177 <br /> nD <br /> March 12, 2004nE��F <br /> MAR 1 2004 <br /> Ms Victoria McCartney <br /> San Joaquin County Environmental Health Division ENVIRONNILN I 0- <br /> 304 <br /> -304 East Weber Avenue, Third Floor PERMIT/SERVVOES }S! <br /> Stockton, California 95202 Yt� <br /> RE February 2004 Batch Groundwater Extraction Report ,.af <br /> Chevron Service Station 9-1452 , li` -A1� <br /> 334 East Main Street � � � ? <br /> Ripon, California <br /> SECOR Project No 77CH 91452 03 0370 <br /> Dear Ms McCartney <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental Management <br /> Company (Chevron), presents data for the February 17, 2004 batch groundwater extraction event at <br /> the site referenced above (Figure 1) This work was performed in accordance with SECOR's Work <br /> Plan for Interim Remedial Measures, dated June 26, 2003 This work plan was approved by the San <br /> Joaquin County Environmental Health Division (County) as indicated in their letter dated October 16, <br /> 2003 (Attachment 1) <br /> On February 17, 2004, Integrated Wastestream Management (IWM), under the supervision of <br /> SECOR, extracted approximately 2,016 gallons of groundwater from well MW-8 (Figure 2) using a <br /> submersible pump at a pumping rate of approximately 5 gallons per minute (gpm) Based on the <br /> data collected during this event, approximately 0 2 pound of dissolved methyl tertiary butyl ether <br /> (MtBE) was removed from the groundwater To date, approximately 0 8 cumulative pound of <br /> dissolved MtBE has been removed from the groundwater <br /> Extracted groundwater analytical data and an MtBE mass removal estimate are presented in Tables <br /> 1 and 2, respectively A certified analytical report and chain-of-custody document is included in <br /> Attachment 2 A field data sheet for the batch extraction event is included in Attachment 3 <br /> If you have any questions or require additional information, please feel free to contact David Evans <br /> of SECOR at (916) 861-0400, extension 234 or Bob Cochran of Chevron at (925) 842-9655 <br /> Sincerely, <br /> SEC R International Incorporated <br /> Karam Parmar )id—M Evans <br /> Staff Engineer Project Manager <br /> 1 IChevron1914521REPORTS\Batch ExtractionTebruary 2004 Batch Extraction doc <br />