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:M- NAM <br /> Working To Restore Nature <br />' 3315 Almaden Expressway,Suite 34 <br /> San Jose,CA 95118 <br />' Phone (408) 264-7723 <br /> FAX (408) 264-2435 <br />' August 13, 1993 <br /> Project No F7120 93 <br /> Quik Stop Markets, Inc <br /> P O Box 5745 <br /> Fremont, CA 94538 <br /> Attention Mr Michael Karvelot <br /> Director of Environmental Affairs <br /> Subject June 1993 Semiannual Groundwater Sampling and Analysts <br /> Quik Stop Market No 120, 9321 North Thornton Road, Stockton, <br />' California <br /> Dear Mr Karvelot <br /> RESNA Industries Inc , (RESNA) is pleased to present this report of the results of the June <br /> 1993 semiannual groundwater sampling and analyses conducted at the subject site in <br /> Stockton, San Joaquin County, California (Plate 1) The site plan (Plate 2) shows the <br />' current location of the station building, adjacent streets, monitoring wells, and other site- <br /> specific features Background information on the site is included in Appendix A <br /> The monitoring wells are sampled quarterly to monitor the shallow groundwater underlying <br /> the site The program objectives are listed below <br />' • Measure depth of groundwater <br /> 0 Construct groundwater elevation contour maps within the study area boundaries <br /> Sample and analyze groundwater samples for specified petroleum hydrocarbons <br /> constituents <br /> • Compare current and past data <br />' The existence and degree of petroleum hydrocarbons in the groundwater underlying the site <br /> is determined by (1) the presence of the free-floating product, and (2) laboratory analyses <br /> of groundwater samples to determine concentrations of total petroleum hydrocarbons as <br /> gasoline (TPHG), as well as benzene, toluene, ethylbenzene, and total xylenes (BTEX) <br />