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�t PHONE 285 2400 <br /> CABLE ADDRESS TIMOIL <br /> SEATTLE T (FAX) 206 283 8036 <br /> TACMA <br /> PORTLAND eNIT�'.l;Fs (^�tT,�t i p( <br /> RENO l 12 7 T° of� E..E'� f 4L hEAL 111 <br /> STOCKTON <br /> 2 TWEE 'fjolftk <br /> RICHMOND N <br /> 1 LOS ANGELES 9 3 e • <br /> 777 <br /> 4 iT � ,5 2737 WEST COMMODORE WAY SEATTLE,WA 98199-1233 <br /> S TMPO BOX 24447 SEATTLE,WA 98124-0447 <br /> D e <br /> January 17, 1995 <br /> Mr Hattan Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, Califomia 95201 <br /> RE Quarterly Status Report- Fourth Quarter 1994 <br /> Jackpot Food Mart, 1434 W Yosemite Ave , Manteca, Ca (Prop No OA-1 a7) <br /> Dear Mr Knoll, <br /> On June 20, 1994, the San Joaquin County Public Health Services Environmental Health Division <br /> (PHS/EHD) requested that Time Oil implement quarterly status reporting and conduct groundwater <br /> monitoring until cleanup of the subject site has been achieved Accordingly, this letter is intended to <br /> satisfy Article 5, Section 2852 of the California Underground Storage Tank Regulations requirement for <br /> quarterly status reporting <br /> iFor your convenience a summary of previous site activities conducted from April 1992 through January <br /> 1995 is included as Attachment 1 <br /> Groundwater Sampling Results- October 1994 <br /> On October 25, 1994, samples were collected from each of the groundwater monitonng wells at the <br /> subject site Pnor to purging, the depth to groundwater in each well was measured by a representative of <br /> SECOR to assist in evaluating changes in elevation, flow direction, and gradient Groundwater with an <br /> easterly flow was encountered at 15 87 to 17 17 feet below ground surface <br /> While trace toluene concentrations appeared in W-8 during the December 1993 groundwater sampling <br /> event, this is the second consecutive quarter of sampling where hydrocarbons have not been rletpMprl in <br /> any of ine samples submitted for analysis Since the previous sampling event, depth to groundwater has <br /> increased across the site by approximately 0 25 feet, and flow changed from northeast to east These <br /> variations are consistent with those observed in previous sampling events, however, not enough data <br /> has been collected to determine their cause <br /> Upon completion, SECOR's quarterly monitoring report will be forwarded to your office This report will <br /> contain field observations, a summary of all groundwater data collected to date, and analytical reports <br /> from the most recent sampling event <br /> Remedial Activities- Fourth Quarter 1994 <br /> SECOR's "Final Remediation Pian", recommending vapor extraction for remediation of the site's <br /> hydrocarbon-impacted soils, was submitted to the PHS/EHD in September 1994 and approved in early <br /> October 1994 Since that time, SECOR has been evaluating vapor abatement equipment and obtaining <br /> appropriate permits It is estimated that system will be installed during the first quarter of 1995 <br />