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..e <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> 1868 East Hazelton Avenue <br /> PROGRAM COORDINATORS <br /> Lnills Stockton, California 95205-6232 Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> C4 <br /> Website: www.sjgov.org/ehd Kasey Foley, REHS F o,Rci�F <br /> Phone: (209) 468-3420 Linda Turkatte,REHS <br /> Fax: (209) 464-0138 <br /> September 10, 2012 <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 95205 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Annual <br /> Ground Water Monitoring Report — Third Quarter 2012 (Report) dated August 28, 2012, <br /> submitted on your behalf by Advanced GeoEnvironmental, Inc. (AGE). <br /> The Report documents a 60-day in-situ air sparging (IAS) pilot test conducted at your site from <br /> March of 2012, through May of 2012. The onsite soil vapor extraction (SVE) system was <br /> operated during the air sparge test to capture released vapors at MW-6. Soil vapors were <br /> recovered throughout the test using the SVE system and wells VW-1 and MW-5. AGE <br /> concludes in the Report that laboratory analytical results indicate significant hydrocarbon mass <br /> was removed and recommended that an additional vapor recovery well would be warranted in <br /> the vicinity of MW-5 should full scale implementation of AS commence on site. <br /> AGE recommends preparation of a corrective action plan (CAP) further evaluating the feasibility <br /> of ground water remedial technologies for the site, based on the findings of the 60-day air <br /> sparging test, coupled with the results from the initial 72-hour pilot test performed in December <br /> of 2011. Furthermore, AGE states that a final remediation plan will be included in the proposed <br /> CAP and will detail procedures for the installation of additional remedial wells and a permanent <br /> remedial system at the site. Proceed with the submittal of CAP. Submit the CAP to the EHD by <br /> November 12, 2012. <br /> If you have any questions please contact Lisa Medina at (209) 468-3455 or by email at <br /> Imedina@sjcehd.com. <br /> Lisa Medina Nuel C. Henderson, Jr. PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: James Barton, CVRWQCB 11020 Sun Center Drive, #200 Rancho Cordova, CA 95670 <br /> Daniel Villanueva, AGE 837 Shaw Road, Stockton, CA 95215 <br /> Susan Oakden, 1200 Watt Avenue, Sacramento, CA 95864 <br />