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l� llY <br /> EM 205513 QSR17 Tosco Service Station 5886 Stockton Cahforma <br /> 70[ 23 2001 <br /> • Tosco wilf continue to perform quarterly groundwater monitoring and sampling at the subject site <br /> Groundwater samples will be collected from all wells (MWI through MW10S/I/D) during the <br /> quarterly groundwater monitoring and sampling event The water samples will be submitted to a <br /> California-certified laboratory for analysis <br /> • Tosco and ERI will continue to conduct a comprehensive review of the data acquired during <br /> previous work The results will be presented to the County in quarterly reports, which describe the <br /> status of the proposed work by the dates established by the County <br /> RECOMMENDATIONS <br /> In addition to the environmental activities to be performed during third quarter 2001 <br /> (provided above), ERI recommends reducing the sampling frequency for analysis of oxygenated <br /> compounds using EPA Method 8260 to an annual timetable and discontinuing laboratory analysis of <br /> groundwater samples for total petroleum hydrocarbons as diesel (TPHd) <br /> ERI recommends signed copies of this summary report be forwarded to the following <br /> Ms Dot Lofstrom <br /> Site Mitigation Unit <br /> San Joaquin County Public Health Services <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> • Mr Warren Hartzell <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> Please call Mr GIenn L Matteucci at (415) 382-5994 if you have questions regarding this summary <br /> report <br /> Sincerely, <br /> Environmental Resolutions, Inc <br /> Glenn L Matteucci <br /> P ram/Project Manager <br /> Ea wo� tLZI, <br /> John B Bobbitt <br /> R G 4313 4 <br /> i No 4313 <br /> OF cl�u� <br />