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v � <br /> Ms.Margaret Lagorio August 19,2009 <br /> Destruction of Groundwater Monitoring Wells Project No.2033-15688-01 <br /> 15688 S. Harlan Road,Lathrop,California <br /> Page 2 <br /> On July 20, 2009, a Stratus geologist was on-site to supervise the drilling and well destruction <br /> activities at the locations shown on Figure 1. Woodward Drilling Company, Inc. of Rio Vista, <br /> California (C-57 License No. 710079) was subcontracted to provide the drilling equipment and <br /> personnel necessary to advance the borings and destroy the monitoring wells. Drilling was <br /> completed using a truck-mounted hollow-stem auger drill rig equipped with 8-inch diameter <br /> augers. The destruction method used was overdrilling of the entire length of the well casing <br /> (total depth of 16 feet below ground surface) and subsequent backfill with neat cement. Well <br /> destruction activities were witnessed by SJCEHD personnel (Margaret Lagorio). Each <br /> wellbox was removed and a concrete patch was placed over the neat cement seal to cap the <br /> boring flush with the surrounding pavement. California Department of Water Resources <br /> (DWR) well completion reports certifying the destruction of the wells were filed with the <br /> DWR (copies included as Attachment B). <br /> Drill cuttings and wastewater generated during field activities were placed in DOT-approved <br /> 55-gallon steel drums and stored on-site pending disposal. One composite soil sample was <br /> collected from the soil drums, relinquished to a CADHS-certified analytical laboratory, and <br /> analyzed for total gasoline range organics (GRO),benzene, toluene, ethylbenzene and total xylenes <br /> (BTEX), methyl tertiary butyl ether(MTBE), and lead(Pb). A copy of the analytical report for this <br /> sample is included as Attachment C. Integrated Wastestream Management, of San Jose, California, <br /> transported the soil (3 drums) and wastewater(1 drum) to licensed facilities for disposal. Copies of <br /> certificates of disposal are included in Attachment D. <br /> If you have any questions regarding this project,please contact Sarah Salcedo at (530) 313-9966. <br /> Sincerely, <br /> 5TRATUS ENVIRONMENTAL, INC. �gS�SNAI CFo` <br /> p� $AKAR G� <br /> Q Q SALCED0 i <br /> Q <br /> Sarah Salcedo, P.G. y9�F�a• 15300 <br /> Project Manager R CAVA <br /> Attachments: Figure 1 Site Plan <br /> Attachment A SJCEHD and City of Lathrop Permits <br /> Attachment B DWR Well Completion Reports <br /> Attachment C Laboratory Analytical Report (Waste Soil Sample) <br /> Attachment D Certificates of Disposal <br /> cc: Mr. Dalwinder Dhoot, 16500 S. Harlan Road, Lathrop, CA 95330 <br /> Mr. Ryan Bouley, 390 Towne Center Drive, Lathrop, CA 95330 <br /> Mr. Jim Barton, RWQCB-CVR <br /> K:\City of Lathrop\Reports\City of Lathrop--Dhoot Well Destruction Report Aug 2009.doc <br />