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MONITORING WELL INSTALLATION & SAMPLING <br /> November 1993 <br /> Rand Property <br /> 7001 Rand Road <br /> Lodi, California <br /> L <br /> 1.0 INTRODUCTION <br /> In accordance with a request from Ms. Patricia Duncan, Geological Audit Services, Inc. <br /> L (GeoAudit) <br /> has prepared this report for the installation and sampling of one groundwater <br /> monitoring well at 7001 Rond Road, Lodi, California (the site). <br /> 2.0 BACKGROUND <br /> 2.1 Site Location <br /> The site is located on a ranch in a rural area of northern San Joaquin County (Figure 1). <br /> A house, barn, shop and numerous storage buildings are located on the property (Figure <br /> 2) <br /> 2.2 UST Removal <br /> One 1,000-gallon gasoline and one 500-gallon diesel underground storage tanks (UST's) <br /> Lwere removed from the property in March 1992. Hydrocarbon contamination (toluene, <br /> ethlybenzene, xylenes and gasoline) was detected in soil samples collected from beneath the <br /> UST's. The contaminated soil was left in place. <br /> In a letter to Rond Estate dated June 30, 1992, from the San Joaquin County Public Health <br /> Services- Environmental Health Division (PHS/EHD) stated "the presence of contaminants <br /> Lat your facility [7001 Rond Road] exceed [sic] the allowable limits of leaching potential as <br /> recommended by the LUFT Manual. The former underground storage tanks (UST) cannot <br /> be recommended for final closure without further investigation to determine the full extent <br /> of the soil and/or groundwater problem." In order to secure a PHS/EHD recommendation <br /> for closure, Ms. Patricia Duncan retained GeoAudit to install and sample one groundwater <br /> monitoring well at the site. <br /> 2.3 Groundwater Depth and Gradient <br /> �. According to the San Joaquin County Flood Control Map (Fall, 1990), depth to <br /> -. , <br /> Geo14-1 A.&Service,.Inc 1 <br /> Rood Pmpergp2-1 G9?,BI S5 <br />