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1 <br /> . ADDITIONAL SOIL AND GROUNDWATER INVESTIGATION <br /> CANEPA'S CAR WASH <br /> 6230 PACIFIC AVENUE <br />' STOCKTON, CALIFORNIA <br /> January 21,2002 <br />' 1.0 INTRODUCTION <br /> Condor-Earth Technologies, Inc. (Condor) conducted site investigation activities from September 26, <br /> 2001 through October 18, 2001 at the Canepa's Car Wash, located at 6230 Pacific Avenue (site) in <br /> Stockton, California (Figures 1, 2 and 3, Appendix A). Condor prepared this report at the request of Mr. <br /> Remo Canepa. The soil and groundwater investigation activities were conducted in general accordance <br /> with the Work Plan - Soil Boring and Monitor Well Installation, dated November 17, 1998, prepared by <br /> Condor, and subsequent approved revisions. <br /> The primary objective of the work described in this report was to further evaluate the lateral and vertical <br /> extent of petroleum hydrocarbon contamination in soil and groundwater at the site. The installation of <br /> three cone penetrometer(CPT) borings, four soil borings, and nine direct push (hydropunch) borings and <br /> the installation, development, surveying, and sampling of four monitor wells were conducted to meet this <br />� . objective. <br /> This report includes project background information, a description of the fieldwork and laboratory <br /> analyses, the results of the soil and groundwater investigation, and a summary/discussion of the results of <br /> the investigation. The work described by this report was conducted under the direct supervision of a <br /> Condor California Registered Geologist. <br /> 2.0 SITE BACKGROUND <br /> In the Report — Soil and Groundwater Investigation, dated rune 12, 1998, Condor recommended <br /> additional soil and groundwater investigation to further characterize the extent of contamination at the <br /> site. In a faxed document dated July 28, 1998, Mr. Ron Rowe of the PHS/EHD requested a work plan <br /> describing the recommended additional investigation activities. In response to Mr. Rowe's request, <br /> I Condor submitted the Soil Boring and Monitor Well Installation Work Plan dated November 17, 1998, <br /> describing proposed additional investigative activities. Upon review of the work plan, Mr. Rowe verbally <br /> requested that the work plan be modified to include deep aquifer characterization with a cone <br /> penetrometer. Condor prepared a letter dated May 18, 1999 providing a work plan addendum describing <br /> the proposed additional deep aquifer soil and groundwater investigation. In a letter to Mr. Remo Canepa <br /> dated May 4, 2001, Mr. Jeffrey Wong of the PHS/EHD approved the work plan dated November 17, <br /> 1998 and the work plan addendum provided by the Condor letter dated May 18, 1999. Comprehensive <br /> site background information is included in Appendix B. <br /> 3.0 FIELD AND ANALYTICAL METHODOLOGY <br /> This section includes a description of the site preparation; drilling procedures; monitor well installation, <br /> surveying, development, and sampling procedures; and the laboratory analytical methodology. <br /> CONDOR <br />