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1260 Graphics Drive <br /> Modesto California <br /> f 95351 <br /> 209 579 2221 <br /> Fax 209 579 2225 <br /> i � J yet r�1j!-•�,_ <br /> �L <br /> A S S O C I A T E S I N C <br /> W <br /> January 30, 1998 <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 Second Quarter 1997 Groundwater Monitoring for KOK Realty, 2403 W Navy <br /> Drive, Stockton, California <br /> Dear Ms Meays <br /> This letter report summarizes field work completed by Smith Technology Corporation (acquired <br /> by ATC Associates Inc ) on behalf of KOK Realty at 2403 W Navy Drive, Stockton, California <br /> during the second quarter of 1997 The site location is shown on Figure 1 <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 1, 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 borings 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 determined that petroleum <br /> hydrocarbon constituents were detected in the soil within 4-5 feet of the static water levels 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 /> discussion of the initial subsurface investigation can be found in RESNA's "Interim Problem <br /> Assessment Report, Soil and Groundwalel Contamination," dated June 8, 1992 <br /> 943341QUARTLYI2QR-1997 DOC 1 <br />