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San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> 600 East Main Street <br /> +� Stockton California 95202-3029 PROGRAM COORDINATORS <br /> } Robert McClellon,REHS <br /> Jeff Carruesco, REHS, RDI <br /> • _ P <br /> Website: www.sjgov.arg/ehd Kasey Foley,REHS <br /> Phone: (209)468-3420 Linda Turkatte,REHS <br /> Fax: (209)464-0138 <br /> May 5, 2011 <br /> Stephanie McKenna Helen McCrary Trust <br /> Chevron Environmental Mgmt. Company c/o Bank of Stockton <br /> 6101 Bollinger Canyon Road Room 5321 PO Box 201014 <br /> San Ramon, CA 94583-2324 Stockton, Ca 95201 <br /> Subject: Former Unocal #2859 <br /> 1665 Pacific Avenue <br /> Stockton, CA 95204 <br /> WORK PLAN:Work Plan for Well Destructions APPROVED: [X] <br /> DATED: April 22, 2011 DISAPPROVED: ] <br /> PREPARED BY: Arcadis <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25296.10(c)(3)]: <br /> 1. Detailed destruction of 21 groundwater monitoring wells, eight ozone sparge wells, three <br /> extraction wells and 14 soil vapor wells per appropriate state and local standards. <br /> 2. Monitoring wells MW-2 and MW-10, and soil vapor wells SVP-1 a/b through SVP-7a/b <br /> will be overdrilled to total depth and backfilled with neat cement. <br /> 3. The remaining monitoring wells, all ozone sparge wells and extraction wells will be <br /> destroyed by pressure grouting. <br /> 4. All waste generated from the destruction activities will be contained in 55-gallon drums <br /> pending transport to an appropriate disposal or treatment facility. <br /> COMMENTS AND CONDITIONS: <br /> 1. Destruction of wells by overdrilling may be done with the same diameter augers that <br /> were used to install the wells. <br /> 2. Manifests documenting receipt of all waste materials at a disposal or treatment facility <br /> must be submitted to the EHD before final site closure can be issued. <br /> 3. Please provide at least 48-hours.notice to the EHD prior to the start of fieldwork. <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN [H& S 25296.10 (c)(3)]: NONE <br /> W ✓• 4�Vy�G�� - <br /> Lori Duncan, REHS <br /> Senior Registered Environmental Health Specialist <br /> cc: Sherrie Lang, Arcadis, 950 Glenn Drive, Suite 125, Folsom, CA 95630 <br />