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San Joaquin County <br /> Environmental Health Department <br /> �o. c DIRECTOR <br /> G`. <br /> 600 East Main Street Donna Heran, REHS <br /> a. �) Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> ,►. - Jeff Carruesco, REHS. RDI <br /> Website: www.sjgov.org/ehd Kasey Foley, REHS <br /> \_FOR <br /> Phone: (209) 468-3420 Linda Turkatte, REHS <br /> Fax: (209) 464-0138 <br /> CARL KNOWLES <br /> PO Box 640 <br /> WOODBRIDGE CA 95258 <br /> RE 1140 W HAMMER LANE SITE CODE: 1124 <br /> STOCKTON CA <br /> WORK PLAN: Amended Corrective Action Plan/Ozone Injection Study <br /> DATED: November 11 2011 <br /> PREPARED BY: Stratus Environmental <br /> APPROVED [X] <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25296.10 (c)(3)]: <br /> 1. To Install four nested ozone injection wells (IW-1A/B through IW-4A/B) to perform ground <br /> water remediation utilizing ozone a chemical oxidant in the saturated zone. <br /> 2. To install one additional MW (MW12) to monitor and evaluate ground water conditions and <br /> cleanup down gradient of source area near existing MW-11. MW#11 has evidenced high <br /> gasoline contaminant concentrations throughout the groundwater investigation assessment at <br /> this site. <br /> 3. To collect selected soil samples for logging and analysis prior to well construction. <br /> 4. To develop. survey, and sample the the proposed MW-12 within 21 days of installation. <br /> 5. To mobilize and set up a portable ozone injection system and begin sparging ozone in the <br /> saturated zone utilizing the four nested injection wells. <br /> 6 A Well Installation Report with conclusions and recommendations will be prepared and <br /> submitted along with Quarterly Remediation Status Reports with conclusions and <br /> recommendations. <br /> COMMENTS AND CONDITIONS <br /> 1 A EHD permit must be procured and fee paid prior to the proposed well installations. <br /> 2 A report of finding must be submitted to EHD and CVRWQCB within 60 day of MW-12 <br /> installation. <br /> 3 The required public participation period for chemical oxidant injection has been completed <br /> No comments were received from the public by the EHD for chemical oxidant injection <br /> remediation The proposed public participation period for the work is considered final and it <br /> should be implemented as soon as possible. <br /> 4. You must apply for and secure all required permits to completed construction and operation of <br /> the proposed portable ozone remediation system. . <br /> 5 All work and reports which require geological or engineering evaluation must be performed <br /> under the direction of an appropriate California registered or certified professional. <br /> DATED <br /> Harlin Knoll Senior REHS (209) 468-3442 <br /> C, James Barton, CVRWQCB, 11020 Sun Center Drive, #200, Rancho Cordova, CA <br /> 95670 <br /> Scott Blttinger- Stratus Inc., 3330 Cameron Park Drive, Ste 550, Cameron Park. CA 95682 <br />