Laserfiche WebLink
. Summary of Gauging and Sampling Activities <br /> October 2003 through December 2003 <br /> Circle K Store 01205 <br /> 16470 Cambridge Street <br /> Lathrop, CA <br /> Site information <br /> Site Circle K Store <br /> 16470 Cambndge Street <br /> Lathrop, CA <br /> Project Coordinator/Phone Number Edward Ralston/916-558-7633 <br /> Groundwater wells onsite 9 <br /> Groundwater wells offsite 7 <br /> Field Actively <br /> Sampling consultant TRC <br /> Date(s)sampled 1019103 <br /> Groundwater wells gauged 16 <br /> Groundwater wells sampled 16 <br /> Purging method diaphragm/submersibie pump <br /> Treatmentidisposal method dunng sampling event Onyx/Rodeo Unit 100 <br /> Free product pumpouts other than sampling event No <br /> Treatment/Disposal method during free product pumpouts N/A <br /> • <br /> Site Hydrogeology <br /> Minimum depth to groundwater(feet bgs) 1265 <br /> Maximum depth to groundwater(feet bgs) 1639 <br /> Average groundwater elevation (feet relative to mean sea level) 149 <br /> Average change in groundwater elevations since previous event(feet) -1 30 <br /> Groundwater gradient and Flow direction 0 002 ft/ft, northeast <br /> Groundwater Condition (Benzene Maximum Contaminant Level[MCL] = 1 0 pg/1) <br /> Wells with benzene concentrations below MCL 11 <br /> Wells with benzene concentrations at or above MCL 5 <br /> Minimum benzene concentration(pgll) ND <br /> Maximum benzene concentration (pg/1) 79(MW-5) <br /> Minimum MTBE concentration (lig/1) ND <br /> Maximum MTBE concentration (pg/1) 540 <br /> Minimum TPPH concentration (pg/1) ND <br /> Maximum TPPH concentration (pg/1) 27000(MW-9) <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 /> This report the results resents r <br /> p p e esu is of groundwater monitoring and sampling activities performed by TRC Please contact the <br /> pnmary consultant for other specific information on this site <br />