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SEP 1 7 2007 <br /> LEE S PIERCE inc. ENVIRONMENT HEALTH <br /> consulting engineers PERMIT/SERVICES <br /> 3800 McHENRY AVENUE, SUITE I <br /> MODESTO, CA 95356-1569 <br /> BILL PELICH,P.E.CIVIL PHONE(209)527-1247 <br /> JOHN LANE,P.G.,R.E.A. FAX(209)527-4810 <br /> LEE MARCUM SALINAS(831)758-0096 <br /> September 12,2007 <br /> Mr. Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 600 E. Main Street <br /> Stockton, CA 95202-3029 <br /> Subject: Monitoring Well Destruction Summary Report <br /> Beneto Inc., 18042 S. Harlan Road, French Camp, California(Figure 1) <br /> Dear Mr. Knoll: <br /> This letter report summarizes the monitoring well destruction activities conducted at the subject <br /> site. The wells were destroyed pursuant to the July 24, 2007 workplan prepared by Lee & <br /> Pierce, Inc. (L&P), which was approved by the San Joaquin County Environmental Health <br /> Department (SJC/EHD). The site location is shown on Figure 1. Monitoring well locations are <br /> shown on Figure 2. Copies of well logs are included in Attachment 1. <br /> On July 31, 2007, Mr. John Lane of L&P supervised V&W Drilling, Inc. (V&W, C57-720904) <br /> destroy wells MW-1, MW-2, and MW-3. Prior to destroying the wells, the depths to bottom <br /> were measured in order to ensure that no obstructions were present in the well casings. V&W <br /> then pumped neat cement grout down the respective well casings in tum using a tremie pipe. <br /> After the casing was completely filled with grout, additional cement was added under pressure to <br /> force the grout through the well screen and into the filterpack and formation. The grout level and <br /> pressure stabilized in each well and no additional grout was necessary. Approximately 28 gallons <br /> of grout was used in each well. After the grout level stabilized, V&W used a 24-inch diameter <br /> auger to remove the well box and surrounding soil to a depth of 3 feet. V&W then cut off the <br /> well casing approximately 6 inches above the bottom of the excavation and applied a mushroom <br /> cap of neat cement grout, which filled the void to at least 6 inches above the cut casing. After <br /> the sealing materials sufficiently set, V&W backfilled the excavation with clean, native soil and <br /> restored the ground surface with cold-patch asphalt. <br /> The unused soil and well debris was placed in a DOT approved 55-gallon drum and will be <br /> disposed to a landfill, <br /> C:Uobs\Beneto\French Camp\WELLDSTRPT_ftenchcemp.doc <br />