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^V7 ; <br /> Summary of Gauging and Sampling Activities <br /> January 2004 through March 2004 <br /> Circle K Store 08671 <br /> 8606 Thornton Road <br /> Stockton, CA <br /> Site Information <br /> Site Circle K Store <br /> 8606 Thornton Road <br /> Stockton,CA <br /> Protect Coordinator/Phone Number Edward Ralston/916-558-7633 <br /> Groundwater wells onsite 8 <br /> Groundwater wells offsite 2 <br /> Field Activity <br /> Sampling consultant TRC <br /> Date(s)sampled 2/12/04 <br /> Groundwater wells gauged 10 <br /> Groundwater wells sampled 10 <br /> Purging method submersible pump <br /> Treatmentldisposal method during sampling event Onyx/Rodeo Unit 100 <br /> Free product pumpouts other than sampling event No <br /> Treatment/Disposal method during free product pumpouts NIA <br /> Site Hydrogeology <br />` Minimum depth to groundwater(feet bgs) 3376 <br /> Maximum depth to groundwater(feet bgs) 368 <br /> Average groundwater elevation(feet relative to mean sea level) -2182 <br /> Average change in groundwater elevations since previous event(feet) 322 <br /> Groundwater gradient and flow direction 'see add'I info <br /> Previous gradient and/or Flow direction(and date) 0 01 ft/ft,North(11/14/03) <br /> Groundwater Condition(Benzene Maximum Contaminant Level[MCL]=1 0 Ng/1) <br /> Wells with benzene concentrations below MCL 9 <br /> Wells with benzene concentrations at or above MCL 1 <br /> Minimum benzene concentration(pg/1) ND <br /> Maximum benzene concentration(Ng/1) 3 1 (MW-2) <br /> Minimum MTBE concentration(pg/1) ND <br /> Maximum MTBE concentration(pg/1) 1200(MW-4) <br /> Minimum TPPH concentration(pgli) ND <br /> Maximum TPPH concentration(pgA) 880(MW-4) <br /> Groundwater wells with free product 0 <br /> Minimum free product thickness(feet) 0 <br /> Maximum free product thickness(feet) 0 <br /> Additional Information <br /> *Groundwater gradient and flow direction 0 001 ft/ft(Shallow Wells) 0 006 ft/ft(Deep Wells) <br /> This report presents the results of groundwater monitoring and sampling activities performed by TRC Please contact the <br /> primary consultant for other specific information on this site <br />