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San Joaquin County <br /> Environmental Health Department <br /> DIRECTOR <br /> G Donna Heran, REHS <br /> Q. 600 East Main Street <br /> # Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> _ — - Jeff Carruesco, RENS. RDI <br /> i 6.0.4\ Website: www.sjgov.org/ehd Kasey Foley, REHS <br /> Phone: (209) 468-3420 Linda Turkatte, REHS <br /> Fax: (209) 464-0138 <br /> October 1, 2010 <br /> Thrifty Oil Company ConocoPhillips Risk Mgmt/Rem <br /> Mr. Chris Panaitescu Ms. Shelby Lathrop <br /> 13116 Imperial Highway 76 Broadway <br /> Santa Fe Springs, CA 90670 Sacramento, CA 95812 <br /> Subject: CP #5449/former TOC #172 LOP Case #: 1227 <br /> 7647 Pacific Avenue CUF #: 002156 <br /> Stockton, CA 95207 Global ID#: T0607700504 <br /> WORKPLAN: Addendum to July 8, 2010 Work Plan for Monitoring Well Destruction <br /> and Replacement and Additional Path Forward. <br /> DATED: September 23, 2010 <br /> PREPARED BY: Diane Barclay, CHG, Stantec Consulting <br /> STATUS: APPROVED with conditions noted below. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [Health & Safety <br /> Code (H&S) Section 25296.10(c)(3)1: <br /> • Destroy 14 PVC monitoring/vapor well casings in 7 separate boreholes in <br /> preparation for on-site, above ground redevelopment. <br /> • Install four on-site and one off-site replacement monitoring wells. <br /> • Secure three existing wells on-site by removing each wellhead and temporarily <br /> relocating each five feet below the surface during redevelopment. After <br /> redevelopment, each modified wellhead is to be reconstructed flush with the <br /> surface. Any well that has obstructions that cannot be removed must be destroyed <br /> under permit/inspection of the EHD. Replacement requirements for secured and <br /> destroyed wells will be determined by the EHD after the report of findings for this <br /> phase has been received on Geotracker and the site characterization evaluated. <br /> COMMENTS AND CONDITIONS: <br /> • Submit a separate well destruction and installation permit application and fee for <br /> on-site and off-site parcels. A copy of the City of Stockton Encroachment/Revocable <br /> permits for off-site MW-16 is to be submitted to the EHD. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN [H&S Section 25296.10(c)(3)1: <br /> • none. <br /> BY <br /> Michael Infurna, Se r Regis red Environmental Health Specialist <br /> (209) 468-3454 <br /> c: CVRWQCB — James L. Barton, Sacramento. <br /> SWRCB — CUF — Mark Owens, Sacramento. <br /> Stantec — Ms. Diane Barclay, 3017 Kilgore #100, Rancho Cordova, 9 t7fil COPY <br />