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San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> 600 East Main Street <br /> ¢ - <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> C4 F OR��P Website: www.S/gov.org/ehd Kasey Foley, REHS <br /> Phone: (209)468-3420 Linda Turkatte, REHS <br /> Fax: (209)464-0138 <br /> October 31, 2011 <br /> Mr. Victorio Aranda <br /> c/o Victor Aranda <br /> 1318 East Scotts Avenue <br /> Stockton, CA 95205 <br /> Subject: Former Electro Delta <br /> 821 South Wilson Way <br /> Stockton, CA 05205 <br /> WORK PLAN: In-Situ Air Sparging Pilot Study Work Plan <br /> DATED: October 24, 2011 <br /> PREPARED BY: Advanced GeoEnviron mental, Inc. (AGE) <br /> APPROVED: [x] <br /> DTSAPFROVED: [ ] <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN [H&S 25299.37, <br /> subd(c)(3)]: <br /> 1. AGE proposes to conduct a 72-hour air sparging pilot test utilizing onsite groundwater <br /> monitoring well MW-6, which has a screened interval from 70-75 feet bsg. <br /> 2. An air compressor will be used to inject the air; it will be connected to the top of well <br /> MW-6. <br /> 3. Wells MW-1 through MW-5 will be used as observation points during the pilot test. At a <br /> minimum, depth to water and dissolved oxygen concentrations will be measured at four <br /> regular intervals each day in each observation well. <br /> 4. Groundwater samples will be collected from MW-5 prior to the start and at the <br /> conclusion of the 72 hours. <br /> 5. The SVE system in operation at the site will remain in operation during the test. <br /> COMMENTS AND CONDITIONS: <br /> 1. A report of findings is due for submittal to the Environmental Health Department (EHD) <br /> within 60 days following the completion of the test. <br /> 2. Forty eight hours notice to the EHD is required prior to all fieldwork. <br /> (&IA- 1,ywuMe- <br /> Lori Duncan, REHS <br /> Senior Registered Environmental Health Specialist <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive #200, Rancho Cordova, CA 95670 <br /> Ally Colavita, AGE, 837 Shaw Road, Stockton, CA 95215 <br />