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SECOR wwwsecorcom <br /> INTERNATIONAL <br /> (iv ® INCORPORATED 3017 Kilgore Road Suite 100 <br /> Rancho Cordova CA 95670 <br /> 916-8610400 TEL <br /> 916 861 0430 FAX <br /> i <br /> February 13, 2004 <br /> nECENED <br /> F F B 17 2004 <br /> Ms Victoria McCartney <br /> San Joaquin County Environmental Health Division ENVIRONMENT HEALTH <br /> 304 East Weber Avenue, Third Floor PERMIT/SERVICES . ` <br /> Stockton, California 95202 ` J r <br /> RE January 2004 Batch Groundwater Extraction Report j I'&� Q J'�* L <br /> Chevron Service Station 9-1452 U <br /> 334 East Main Street �'� '1 <br /> Ripon, California <br /> SECOR Project No 77CH 91452 03 0370 f <br /> Dear Ms McCartney <br /> SECOR International Incorporated (SECOR), on behalf 22f Chevron Environmental Management <br /> Company (Chevron), presents data for the January 16, 20 04 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 January 16, 2004, Integrated Wastestream Management (IWM), under the supervision of <br /> SECOR, extracted approximately 2,370 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 6 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 c` <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 /> 3 <br /> Sincerely, <br /> S CO International Incorporated <br /> �� xt <br /> Karam Parmar avid M Evans <br /> Staff Engineer Project Manager i <br /> y� <br /> r <br /> • <br /> 1Chevron1914521REPORTS1Batch ExtractronlJanuary 2004 Batch Extraction doc <br />