SITE INFORMATION AND CORRESPONDENCE_FILE 2

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a � San Joaquin County Environmental Health Department DIRECTOR 1868 East Hazelton Avenue Donna Heran, REHS X Stockton , California 95205-6232 PROGRAM COORDINATORS Robert McClellon, REHS Jeff Carruesco, REHS, RDI Cq' • - . . ... �ta�P a Website: www.sigov. orglehd Kasey Foley, REHS r F o R Linda Turkatte, REHS Phone: (209) 468-3420 Rodney Estrada, REHS Fax : (209) 464-0138 Adrienne Ellsaesser, RENS August 8, 2014 Floyd and Helen Barnes 9477 Fountain Valley Stockton , CA 95209 Subject: Barnes Trucking 1817 Fresno Avenue Stockton, CA 95206 The San Joaquin County Environmental Health Department (EHD) has received and i reviewed DPE Pilot Test/Mass Removal Event Results Report, dated 04 April 2014, prepared and submitted by your consulting firm , Stratus Environmental, Inc. (Stratus) , on your behalf for the above-referenced site. In DPE Pilot TestlMass Removal Event Results Report, Stratus reported that they had performed a 30-day Dual Phase Extraction (RPE) pilot test between November 20 and December 31 , 2013. During the pilot test, the DPE system operated for approximately 579 . 2 hours and approximately 125, 670 gallons of groundwater were extracted from the subsurface. Stratus also reported that an estimated mass of 82. 9 pounds of gasoline range organics (GRO) was removed from the subsurface in the vapor phase , and estimated masses of 0 .42 pounds of GRO, 0 . 12 pounds of diesel range organics (DRO) , and 0. 03 pounds of benzene were removed from the subsurface in the dissolved phase. Stratus stated that, based on the available site data and pilot test, DPE_ appears to be a viable remedial alternative for this site . Stratus proposed a smaller scale, localized remedial bPt system at air sparge well (AS- 1 ) , to reduce the benzene level sufficiently to enable the site to be closed under the Low Threat Closure Policy, adopted by the State Water Resources Control Board (SWRCB) on 17 August 2012. Stratus recommended that all parties involved with the case including the responsible party, Floyd Barnes , EHD, and RWQCB meet to discuss a strategy for achieving closure of site within a reasonable period of time. The EHD concurs with utilization of a smaller scale DPE system to reduce benzene concentration . The EHD is of the opinion that a meeting is unnecessary at this time , but will meet with all parties if requested by the responsible party, but cannot answer for the RWQCB. -Please-submit a Correction-Acti nc .Plan_ (CAP) that demonstrates the preferred cost effectiveness of the DPE technology compared to other technologies that may be effective on your site , and include proposed clean up goals and a Final Remediation Plan . Following a public participation period of 30 days, the EHD anticipates approving the CAP and your Final Remediation Plan. Our records do not include a record owners of fee title to the above-referenced site , as is required by Section 25297 . 15 of the California Health and Safety Code . Submit a complete list of record owners of fee title and their mailing addresses to the EHD; also certify that all have been informed of the pending final remediation plan . A form has been enclosed for this purpose. Please submit the — information at your earliest convenience .