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1 <br /> I 7144407700 CRC ENVIRONMENTAI:"' RISK 'MA <br /> 7l4 47b76 82l NAGEMENT, INC. t Mi <br /> f 8211 FAX 1 <br /> 17875 VON KARMAN <br /> SUITE 200 <br /> IRVINE,CALIFORNIA <br /> 92714 <br /> May 17; 1995 <br /> Linda Turkatte, Senior REHS <br /> SITE MITIGATION UNIT <br /> 445 N. San Joaquin St. <br /> Stockton, California 95201-0388 <br /> RE: Work Plan (Well Abandonment) <br /> 1235 E. Alpine <br /> Stockton, California <br /> Dear Ms. Turkatte: <br /> In accordance with San Joaquin County Public Health Services Environmental Health Division <br /> (PHS/EHD) policy, the following is a work plan for destruction;of the six (6) groundwater monitoring <br /> wells located at 1235 E. Alpine, Stockton, California on the property known as the "Major Mart Site." <br /> The following work will be initiated: <br /> • All wells, with the exception of monitoring well MW-4 will be pressure grouted with a <br /> neat cement grout. Once the grout has formed i a "cup" over the sheared casing, the <br /> excavation will be backfilled with soil or gravel. <br /> • Wells will be over-drilled at least three 3 feet below rade with the exception of MW-5 <br /> { p <br /> g <br /> and MW-6 which will be over-drilled to a depth 'of five (5) feet. Dean Gillman of San <br /> Joaquin County Department of Public Works Planning.Department has been consulted <br /> relative to this over-drilling which is consistent with their planned street widening along <br /> West Lane. A copy of the encroachment permit is included. <br /> s <br /> • Monitoring well MW-4 will be pressure grouted; however, once pressure grouting has <br /> been completed, MW-4 will be over-drilled to a`°de th'of fifty 50 <br /> P P Y ( ) feet. The zone of <br /> naphthalene impact is at approximately twenty-five (25)"feet. The over-drilled portion of <br /> the well will be tremmie grouted with neat cement grout to within three (3) feet of the <br /> surface. <br /> • Soil cuttings from MW-4 will be drummed on-site and disposed of within ten (10) days <br /> at an appropriate off-site disposal facility. <br /> Should you have any questions relative to this work plan, please feel free to contact me at 7141440-7700. <br /> S' , <br /> Trevor Santochi <br /> Technical Director <br /> NrcvorU5250 k42A%r - , <br />