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N '.t <br /> PH-0-KE 285 2400 <br /> CABLE ADDRESS TIMOIL <br /> SEATTLE T E- „� -• -- ,• +- ^ I '?�� (FAX) 206 283 8036 <br /> TACOMA - + <br /> PORTLAND <br /> STOCRENO ON H k2 I TO r I "- <br /> RENO 3 E Cr �4 �� t®I! L C O • <br /> RICHMOND 2 0 <br /> LOS ANGELES 9 " <br /> R 4 -- <br /> 7 6 s Tr 2737 WEST COMMODORE WAY SEATTLE,WA 98199-1233 <br /> T <br /> FRo..CT5 ,M P O BOX 24447 SEATTLE,WA 98124-0447 S <br /> TIME TESTED E <br /> October 22, 1996 <br /> r <br /> Mr Harlan Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, Califomia 95201 ; <br /> RE Submittal of"Confirmation Soil Sampling Report and Request for Closure" and <br /> Third Quarter 1996 Status Report for _ <br /> Jackpot Food Mart, 1434 W Yosemite Ave , Manteca, CA (Property No 04-167) _ <br /> Dear Mr Knoll, �n 3 <br /> On June 20, 1994, the San Joaquin County Public Health Services Environmental Health Division - <br /> (PHSIEHD) requested that Time Oil implement quarterly status reporting and conduct grounoWater <br /> monitoring until cleanup of the above-referenced site has been achieved Accordingly, this letter is <br /> intended to satisfy the requirements for quarterly status reporting as outlined in Article 5, Section 2652 of <br /> the California Underground Storage Tank Regulations <br /> Because groundwater at the subject site had not been impacted, and soil impacts appeared to be <br /> residual, Time contacted the PHS/EHD in early 1996 to discuss the need for active site remediation and t <br /> continuation of the quarterly groundwater monitoring program The PHSIEHD agreed that semi-annual <br /> groundwater mondonng would be sufficient, and that a remediation system for soils might not need to be <br /> installed if it could be shown that bioattenuation was occurring in the site's soils Accordingly, a workplan w <br /> was forwarded to the PHSIEHD on April 22, 1996, which presented a scope of work to evaluate <br /> bioattenuation Please find enclosed a copy of SECOR's "Confirmation Sampling Report and Request <br /> for Closure" dated October 9, 1996, which contains the results of the bioattenuation study and outlines <br /> data to be considered in evaluating the possibility of site closure Verbal approval of the workplan was <br /> received from the PHSIEHD prior to the Initiation of site activities <br /> For your convenience, a summary of previous site activities is attached <br /> Groundwater Sampling - Second Half 1996 <br /> The Second Half 1996 groundwater sampling event will be scheduled for November or December 1996 <br /> Remediation Activities- Third Quarter 1996 <br /> In order to determine if bioattenuation is occurring in hydrocarbon-Impacted soils beneath the subject <br /> site, a Geoprobe sampling system was used to collect soil samples on July 5, 1996 Continuous-core <br /> samples were collected from three locations to depths of up to 16 feet below ground surface (bgs) Each <br /> sampling location corresponded to the approximate location of hydrocarbon-Impacted soils encountered - <br /> during previous activities <br /> Corresponding <br /> Point No Former Samples _ _ Location/Former Findings <br /> GP-1 W-3, P2 North pump Island Up to 13 000 ppb at 4 5 feet bgs and 0 71 ppm at 14 5 feet bgs <br /> GP-2 W-2 East of existing pump Islands Up to 100 ppm gasoline at 5 feet bgs - <br /> GP-3 W-1, T3 East portion of former tank bed Gasoline up to 460 ppm at 14 5 feet bgs <br />