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1 <br /> - A <br /> Working To Restore Nature <br />' 3315 Almaden Y� <br /> Ex resswa Suite 34 <br /> Expressway, <br /> San Jose,CA 95118 <br /> Phone (408) 264-7723 <br /> FAX (408)264-2435 <br /> February 2, 1994 <br /> Project No F7132 93 <br /> Mr Michael Karvelot <br /> Director of Environmental Affairs <br /> Quik Stop Markets, Inc <br /> 4567 Enterprise Street <br /> Fremont, California 94538 <br /> Subject Letter Report, Quarterly Groundwater Monitoring, Fourth Quarter 1993 <br /> I Quik Stop Market No 132 <br /> 3555 West Hammer Lane, Stockton, California <br /> Mr Karvelot <br /> RESNA Industries Inc (RESNA), is pleased to present this report of the results of the <br /> quarterly groundwater monitoring, for fourth quarter 1993 conducted at the subject site <br /> located in Stockton, San Joaquin County, California (Plate 1) The site plan (Plate 2) shows <br /> the location of the station building, adjacent streets, monitoring wells, and other site-specific <br /> features Background information on the site,was included in Appendix A of our quarterly <br /> groundwater monitoring report for September 1993 (RESNA, December 1993) <br /> The monitoring wells are sampled quarterly to monitor two shallow groundwater units <br /> underlying the site The program objectives are listed below <br /> • Measure <br /> depth of groundwater <br /> P <br /> • Sample and analyze groundwater samples for selected petroleum hydrocarbons <br /> I • Construct groundwater elevation contour maps within the study area <br /> boundaries <br /> • Compare current and past data <br /> The existence and degree of petroleum hydrocarbons in the groundwater underlying a site <br /> is evaluated by (1) the presence of the free-floating product, and (2) laboratory analyses of <br /> groundwater samples to evaluate concentrations of total petroleum hydrocarbons as gasoline <br /> (TPHg), and for benzene, toluene, ethylbenzene, and total xylenes (BTEX) <br />