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t Fourth Quarter Post-Remediation Monitoring and Sampling Report and Second Request for Closure 3 <br /> I The Southland Corporation Store No.20304,455 Grant Line Road,Tracy CA December 11,1998 <br /> Request for Closure <br /> Based on 1)the removal of the hydrocarbon source from the site,2)the low to moderate residual ) <br /> hydrocarbon concentrations remaining in the groundwater at the site which are expected to decline over 1 <br /> time,3)source area concentration declines of up to 97%since completion of remediation,4)the naturally <br /> t occurring biodegradation of the dissolved hydrocarbon plume which is expected to continue, 5) data <br /> indicating that the dissolved hydrocarbons plume is stable and is not a threat to any nearby water producing <br /> wells,and 6)the absence of MTBE and other gasoline oxygenates in the samples collected from existing <br /> site monitoring wells, Fluor Daniel GTI, on behalf of the Southland Corporation, request that the site be <br /> $ classified as low risk under the State Water Resources Control Board policies and that no further action be <br /> required at this site. Quarterly groundwater monitoring and sampling will be discontinued until the California <br /> Regional Water Quality Control Board responds to this request for closure. <br /> + Please contact Fluor Daniel GTE's Martinez office at(925)370-3990 if you have any questions or comments <br /> regarding this report. <br /> Sincerely, <br /> Fluor Daniel GTI,Inc. Fluor Daniel GTI,Inc. <br /> { Submitted by: Approved by: <br /> Bob Butler c`--Fthelby Lathrop' <br /> Geologist Project Manager € <br /> Ed K, Simonis, R.G. <br /> # Senior Geologist i <br /> No.4422 Z3 <br /> Ms. Elizabeth Thayer-California Regional Water Quality Control Board -CVR *� <br /> t Mr. Harlin Knoll - San Joaquin County Public Health Services <br /> r <br /> , <br /> 1 Attachments: <br /> 1. Figures t <br /> 2. Tables <br /> j 3. Field Data Sheets <br /> I 4. Laboratory Analysis Report <br /> f <br /> 20304g4 rpt <br /> FLUOR DANIEL GTI <br /> J <br /> �l <br /> _ E <br />