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2000 Opportunity Dr,Suite 110, Roseville,California 95678 <br /> Cil C� � <br /> CONESTOGA-ROVERS Telephone: 916.677.3407,ext. 100 Facsimile: 916.6773687 <br /> &ASSOCIATES www.CRAworld.com <br /> JUL 01 2008 <br /> ENVIRONMENT HEALTH June 30,2008 <br /> PERMIT/SERVICES <br /> Ms. Victoria L. McCartney <br /> San Joaquin County <br /> Environmental Health Division(SJCEHD) <br /> 600 Main Street <br /> Stockton, CA 95202 _ <br /> Re: Final Well Destruction Report !/I�� �117 <br /> Chevron Service Station #9-1452 <br /> 334 East Main Street <br /> Ripon, CA <br /> Dear Ms. McCartney: <br /> Conestoga-Rovers & Associates (CRA) has prepared this Final Well Destruclion Report on behalf of Chevron <br /> Environmental Management Company (Chevron) for the site referenced above (Figure 1). CRA destroyed the <br /> monitoring wells in response to a no further action letter by the RWQCB, dated May 15, 2008 (Attachment A). <br /> On June 4 through June 6 and June 9, 2008, CRA Staff Scientist <br /> Benjamin Summersett and Staff Scientist John Bostick observed V Table A-Well Destruction Methods <br /> & W Drilling, Inc. (C57# 720904) destroy groundwater monitoring Destruction <br /> wells MW-1 through MW-4, MW-5S, MW-5D, MW-6S, MW-6D, Well I.D. Date Method <br /> MW-7D and MW-8 (Figure 2). All monitoring wells were properly MW-1 6/6/2008 Drill Out <br /> destroyed by over-drilling to the total depth of the well and back <br /> filling with Portland I/II cement to surface. MW-2 6/9/2008 Drill Out <br /> MW-3 6/9/2008 Drill Out <br /> All soil and decontamination water waste generated was stored in <br /> DOT approved 55-gallon steel drums on the Site pending profiling MW-4 6/6/2008 Drill Out <br /> for off site disposal at a licensed receiving facility. Twenty-four(24) MW-5S 6/5/2008 Drill Out <br /> drums of investigation-derived waste (IDW) were generated as a <br /> result of drilling activities. Profile paperwork for the IDW stream MW-5D 6/5/2008 Drill Out <br /> was submitted to Integrated Wastestream Management (IWM) for MW-6S 6/6/2008 Drill Out <br /> soil disposal. The soil IDW(21 drums)were transported to Republic MW-6D 6/6/2008 Drill Out <br /> Service Vasco Road Landfill in Livermore, California. The liquid <br /> IDW (3 drums) were transported to Chemical Waste Management in MW-7D 6/4/2008 Drill Out <br /> Kettleman City, California. Documentation for waste disposal MW-8 6/5/2008 Drill Out <br /> provided by IWM is included as Attachment B. <br /> Equal <br /> Employment <br /> Opportunity Employer <br /> Worldwide Engineering,Environmental,Construction,and IT Services <br />