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} ,3 <br /> O <br /> Cd YI it �_ lii�ltl—Ifs <br /> F t <br /> ENVIRONMSKTH <br /> ENTAL TECHNOLOGIES CORPORATION }� <br /> . f •i+3 1 .� z i � <br /> January 7, 1997 <br /> 94334 <br /> Ms Mary Meays <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> PO Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject Fourth Quarter 1996 Groundwater Monitoring for KOK Realty, 2403 W Navy <br /> Drive, Stockton, California <br /> Dear Ms Meays <br /> Thus letter report summarizes field work completed by Smith Technology Corporation on behalf <br /> of KOK Realty at 2403 W Navy Drive, Stockton, California during the fourth quarter of 1996 <br /> The site location is shown on Figure I <br /> BACKGROUND <br /> The site was the location of one underground storage tank In response to a San Joaquin County <br /> Public Health Services, Environmental Health Division (PHS/EHD) request for a subsurface <br /> investigation, RESNA Industries, Inc (RESNA) was engaged by the law firm of McDermott, Will <br /> & Emery to assess the nature and extent of soil and groundwater contamination at the site <br /> In early 1992, a RESNA field geologist observed the drilling of three soil borings (MW I, MW2, <br /> and MW3) at the site to characterize subsurface conditions Groundwater was encountered at a <br /> depth of approximately 15-16 feet below ground surface The bonngs were advanced to a depth <br /> of approximately 30 feet below grade and subsequently converted to groundwater monitoring <br /> wells <br /> Laboratory analysis of soil samples collected from the three borings determuned that petroleum <br /> hydrocarbon constituents were detected in the soil within 4-5 feet of the static water Ievels at the <br /> site Laboratory analysis of groundwater samples collected from the wells subsequent to <br /> development indicated that gasoline constituents were present above laboratory method detection <br /> limits in the groundwater samples collected from each site monitoring well Initial groundwater <br /> monitoring data (March 1992) determined groundwater flow direction to the south A detailed <br /> 7 <br /> 943341QUAR7LYWQR 19%DOC 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering Consulting Remediation Construction <br />