Laserfiche WebLink
r � <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> o.° C Donna Heran,REHS <br /> 600 East Main Street <br /> c. { PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 Robert McClellon, REHS <br /> Jeff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> Website: www.sjgov.org/ehd Linda Turkatte, REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> February 2, 2012 <br /> Mrs. Winifred Alexander Mr. Sarbjit Singh Sarao <br /> Mary Gardella Trust 1305 South Wilson Way <br /> 525 2nd Street Stockton, California 95205 <br /> Santa Cruz, California 95060 <br /> Estate of Mr. Joseph Gardella <br /> Mr. Dennis Caspe, Esquire <br /> 2035 North Pacific Avenue <br /> Santa Cruz, California 95060 <br /> Subject: Former Stefano's Gasoline Station <br /> 1419 East Charter Way <br /> Stockton, California 95205 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Groundwater <br /> Monitoring and Remediation Report— Third Quarter 2011 (report), dated 19 September 2011, <br /> prepared and submitted by your consulting firm, Advanced GeoEnvironmental, Inc. (AGE), for <br /> the above-referenced site. In the report, AGE described the reduction of petroleum <br /> hydrocarbon contamination in groundwater samples collected from monitoring well MW-2, the <br /> most impacted well, as a direct result of the ozone injection remediation system. The system <br /> consists of one injection point, OZ-4, that began operating on 05 March 2011 and ceased <br /> operating on 08 September 2011 . On 09 September 2011, AGE discovered drilling sand in <br /> the casing of OZ-4 and suggested "that the ozone injection point diffuser had been <br /> compromised and likely disconnected from the casing." AGE recommended that OZ-4 be <br /> properly destroyed and reinstalled or possibly several other ozone injection points be installed <br /> within the shallow portion of the aquifer. <br /> The EHD received the annual five-year review update letter dated 12 September 2011 from <br /> the State Water Resources Control Board (SWRCB) Cleanup Fund (CUF) recommending that <br /> the EHD review this site for closure. In the response letter dated 14 October 2011, the EHD <br /> expressed concern about the potential for vapor intrusion, considering a motel building is <br /> approximately 20 feet north of MW-2. No soil data exists between the motel and the north end <br /> of the excavation where total petroleum hydrocarbons quantified as gasoline (TPH-g) was <br /> detected at a concentration of 2,500 milligrams per kilogram (mg/kg). By letter dated 23 <br /> February 2011, the EHD had directed the collection of confirmation soil gas or soil samples <br /> following remediation by ozone injection and the EHD informed the CUF that consideration of <br /> this site for closure would be based on the analytical results from this investigation. <br />