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9 ,f'/ " 0 -A <br /> ��/ <br /> SECUR wwwsecor.com <br /> INTERNATIONAL 3017 Kilgore Road,Suite 100 <br /> S E C O R INCORPORATED Sacramento,CA 95670 <br /> 916-861-0400 TEL <br /> 916-861-0430 Fm <br /> February 25, 2005 HEWED <br /> 27 <br /> Margaret Lagorio FFR 2 S 005 <br /> Environmental Health Department ENVIRONMENT HEALTH <br /> San Joaquin County PERMIT/SERVICES <br /> 304 Weber Avenue, Third Floor <br /> Stockton, CA 95202-2708 <br /> Re: Damaged Monitoring Well MW-11 <br /> Former 76 Station #6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Site Code: 1217123 <br /> Dear Ms. Lagorio: <br /> On behalf of ConocoPhillips, SECOR International Incorporated is submitting a response to <br /> the request for details regarding damaged monitoring well MW-11 at the site referenced <br /> above (Figure 1). A San Joaquin County Environmental Health Department (SJCEHD) <br /> letter received on January 12, 2005 requested details of the damage to the well and how it <br /> will be repaired. The SJCEHD letter is included in Attachment A. <br /> Damage to monitoring well MW-11 appears to be limited to the top five inches of the poly- <br /> vinyl chloride (PVC) well casing. The well casing was bent by unknown causes prior to the <br /> June 16, 2004 quarterly groundwater sampling event conducted by TRC. The bent well <br /> casing currently does not allow groundwater purging and sampling equipment to reach the <br /> water table and the well has not been sampled since the March 9, 2004 sampling event. <br /> Repair to the well will be conducted by cutting off the bent portion of the casing and <br /> replacing it with a new section of blank well casing connected by a PVC coupler. The well <br /> will be surveyed by a California licensed surveyor after repair of the well is completed. The <br /> well will be repaired and sampled during the 2"d quarter of 2005. Sampling results will be <br /> included in the 2"d quarter 2005 quarterly monitoring report for the site. <br /> Please contact Brice Hendricks at: (916) 861-0400 if you have any questions or concerns. <br /> Sincerely, <br /> SECOR Internatil al Incorporated <br /> � X77 <br /> Brice Hendricks <br /> Project Scientist <br /> Cc. Ms. Shelby Lathrop, ConocoPhillips <br /> Mr. Dennis Jensen, TRC <br />