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SOIL AND GROUNDWATER INVESTIGATION ' REPORT Herman & Helen's Marina Venice Island Ferry Stockton, California 95219 ' September 26, 1995 1.0 INTRODUCTION Condor Earth Technologies, Inc. (Condor) conducted a soil and groundwater investigation at ' Herman & Helen's Marina located at Venice Island Ferry, Stockton, California (Figure 1, Appendix A, Location Map). The investigation was conducted in accordance with the Soil and Groundwater tInvestigation Work Plan, prepared by Condor, dated May 30, 1995. The work plan was approved by the San Joaquin County Environmental Health Department (SJCEHD) and the local Reclamation District ' #2029. The results of the investigation are presented in this report. ' The purpose of the work was to investigate the extent of gasoline and diesel contamination associated with underground storage tanks (USTs) formerly located at the site (Figure 2, Appendix A, ' Site Map). The fieldwork conducted during the investigation included the drilling of three (3) hydropunch boreholes (HP-1, HP-2, and HP-3) and the collection of soil and groundwater samples ' from each borehole. All work was conducted at the direction and approval of the SJCEHD and the Reclamation District. This report was prepared by Condor at the request of Mr. David Smith, ' President, Herman and Helen's Marina. This report includes a discussion of the site background and a description of the fieldwork and laboratory analyses conducted during the investigation. ' Recommendations are presented in Section 4.0 of this report. ' 2.0 SITE BACKGROUND The subject site is located on Eight Mile Road, at Venice Island Ferry, approximately 5 miles ' northwest of Stockton, California, (Figures 1 and 2, Appendix A). On October 30, 1991, Warren E. Gomes Excavating, Inc., of Rio Vista, California, excavated and removed three (3) USTs (TK1, TK2, ' and TK3) from the site. The USTs contained gasoline and diesel fuel. A Condor representative was tL� CONDOR