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' San Joaquin County DIRECTOR <br /> Environmental Health Department Donna Heran, REHS <br /> oP. . . . . . . . c <br /> ).- =:.y�� ' � .o ASSISTANT DIRECTOR <br /> Q: 1.--�,.2y—u 2� 600 East Main Street Laurie Cotulla, REHS <br /> W Stockton , California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman, REHS <br /> Mike Huggins, RENS, RDI <br /> 4 N Website: www.s1ovorg/ehd <br /> Margaret Lagorio, REHS <br /> Phone : (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209) 464-0138 Jeff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> BILL BORGH <br /> CONOCOPHILLIPS <br /> 76 BROADWAY <br /> SACRAMENTO CA 95818 <br /> I <br /> i <br /> RE : Former Circle K Site Code: 2261 <br /> 8606 Thornton Road <br /> Stockton , Ca. <br /> WORK PLAN : Oxygen Injection Activities and Hydrogen Peroxide Bench Scale Study <br /> DATED : August 15, 2008 <br /> PREPARED BY: Stantec <br /> APPROVED: [X] <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25296. 10 (c)(3)] : <br /> 1 . To install 8 oxygen injection sparge wells (OS) and perform an oxygen injection feasibility <br /> study. <br /> 2 . To perform semi-monthly mobile oxygen injection . <br /> 3 . To evaluate oxygen injection as a viable remedial alternative for corrective action . <br /> 4 . To collect soil and ground water samples from one of the soil borings. <br /> 5. To analyze the soil and ground water samples for: TPH-gas, BTEX, oxygenates including <br /> MTBE, and fuel additives including 1 ,2-DCA by EPA method 8260B . <br /> 6 . To perform an ozone bench scale test using the soil and ground water samples collected . <br /> 7 . To complete and submit appropriate reports to EHD for review and comment. <br /> COMMENTS AND CONDITIONS: <br /> 1 . The ozone bench scale test should include additional analysis : bromate by EPA Method 317 <br /> and bromide by EPA Method 300. Total chromium should be analyzed by 6020. <br /> 2 . General metal analysis should be completed on ground water samples collected from existing <br /> nearby on-site MWs to assure ground water quality has not been affected by the oxygen <br /> injection application . A pre-application base line ground water analysis for general metals <br /> maybe warranted. <br /> 3. All work must be performed under required permits. A well installation permit application and <br /> fees must be submitted to EHD by October 15, 2008. <br /> 4. The proposed scope of work must be completed within 90 days of EHD permit issuance. <br /> 5 . The report of findings must be completed and submitted to EHD and CVRWQCB by <br /> � <br /> j December 31 , 2008 . <br /> i <br /> DATED /J/P9 BY <br /> Harlin Knoll, Senior REHS (209) 468-3442 <br /> Cc: STANTEC-Mark Bare <br />