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SECOR www secor com <br /> INTERNATIONAL <br /> S E C ® R INCORPORATED 3017 Kilgore Road Suite 100 <br /> Rancho Cordova CA 95670 <br /> 816-861-0400 TEL r <br /> 916-861-0430 FAx <br /> May 12, 2004 <br /> Ms Victoria McCartney <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Avenue, Third Floor MAY 14 2004 p 1� � <br /> Stockton, California 95202 ENVIRONMENT HEALTH �`�'��°� <br /> RE April 2004 Batch Groundwater Extraction Report PERMIT/SERVICES rf <br /> Chevron Service Station 9-1452 <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 April 15, 2004 batch groundwater extraction event at the <br /> site referenced above (Figure 1) This work was performed in accordance with SECOR's Work Plan <br /> 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 April 15, 2004, Integrated Wastestream Management (IWM), under the supervision of SECOR, <br /> extracted approximately 1,860 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 1 1 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 /> SECOR International Incorporated <br /> r� <br /> 4/�.bramParmar 67)1--�M�Evans <br /> Staff Engineer Project Manager <br /> 11Chevron1914521REPORTS\Batch ExtractionWpril 2004 Batch Extraction doc <br />