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Page 2 of 3 <br /> �./ *./ <br /> The Environmental Health Department(EHD) sent a letter dated 05 August 2011 directing that the potential threat <br /> from vapor intrusion in the area of the warehouse adjacent to Larry's Auto be evaluated using appropriate data <br /> and risk model and the evaluation be submitted to the EHD by 01 November 2011. Please give me an update <br /> concerning this matter. <br /> Also, by letter dated 11 October 2010, the EHD stated that if the initial findings from the IAS/SVE system were <br /> favorable, then proceed to submit a work plan to install additional extraction wells with in-well air-sparging points <br /> in the southwest area of this site near monitoring wells MW-4, MW-5 and MW-8. What are AGE's plans <br /> concerning this matter? <br /> Vicki McCartney,Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 600 East Main Street <br /> Stockton,California 95202 <br /> Phone: (209)468-9852 <br /> Fax: (209)468-3433 <br /> Email: vmccartney@sicehd.com <br /> From: William Little J•mailto:wlittle@ad[Ngeoenv.com] <br /> Sent: Tuesday, February 28, 2012 2:46 PM <br /> To: Vicki McCartney [EH] <br /> Subject: 308 Grant Street <br /> Vicki McCartney, <br /> AGE has operated and maintained the SVE unit at 308 Grant Street over the past <br /> quarters and operated the SVE unit. At the end of June 2011 approximately 2,786 hours <br /> were listed on the SVE unit and repairs were performed in October to the equipment <br /> (SVE unit not operated in early-mid October to mid-late November). By the end of <br /> December 3,790 hours were on the SVE unit. <br /> In September and December samples-SVE-were collected and analyzed — attached. <br /> Analytical and field reading with organic vapor meters have detected no significant <br /> extraction of impacted soil vapor (likely SVE has remediated the shallow soil impact) and <br /> even after several rebound attempts, the vapor concentrations are not increased. <br /> Another sample from February is at the laboratory and will be available next week. The <br /> total hours from 24 February 2012 is 4,197 hours. <br /> Please call me if you have any questions. <br /> Sincerely, <br /> William R. Little <br /> California Professional Geologist 7473 <br /> Oregon Registered Geologist G2254 <br /> Washington Licensed Geologist 2778 <br /> Advanced GeoEnvironmental Inc. www.advgeoenv.com <br /> Stockton • Santa Rosa • Monterey• Brea •Spokane• Reno• Dallas <br /> (800)511-9300 <br /> This emailffax message is for the sole use of the intended recipient(s)and may contain confidential and privileged information.Any <br /> 2/29/2012 <br />