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0 • <br /> August 30, 2011 <br /> Ms. Stephanie McKenna Page 2 of 2 <br /> Stockton Commingled Plume <br /> If the well construction is unknown and/or is located in an area of known or <br /> suspected pollution or contamination, the well shall be destroyed by removing all <br /> material within the original borehole including well casing, screen, filter pack, and <br /> annular seal); and the created hole filled completely with appropriate sealing <br /> material. <br /> The condition of a monitoring well located in an area of known or suspected pollution or <br /> contamination is met by the CMT wells, therefore any well destruction plan must include <br /> removal of the well contents to total depth. For these problematic well destructions, it may be <br /> prudent to grout the CMT chambers as described in WP prior to attempting to remove the well <br /> contents. For the EHD to issue a permit for the destruction of the CMT wells, the work plan must <br /> include removal of the well contents. One EHD caseworker reports some success with sonic <br /> coring of these wells. <br /> Comments and/or questions may be addressed to the undersigned. <br /> Sincerely, <br /> Nuel C. Henderson, Jr., PG Adrienne Ellsaesser, REHS <br /> Engineering Geologist Acting Program Coordinator <br /> cc: Denis Brown, Shell Oil Products US, 20945 South Wilmington Avenue, Carson, CA 90810 <br /> Sergio Morescalchi, Atlantic Richfield Company, P.O. Box 1257, San Ramon, CA 94583 <br /> Matt Gabris, Sara Lee Bakery Group, Inc., 3500 Lacey Rd., Downers Grove, IL 60515 <br /> Jim Barton, CVRWQCB, 11020 Sun Center Dr., Ste. 200, Rancho Cordova, CA 95670 <br /> Well Destruction Work Plan Comment Letter 0811 <br />