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PRE-TANK REPLACEMENT Site Assessment Results 880 VICTOR ROAD LODI, CA. Aegis Project No. 89-014 Page 1 1.0 INTRODUCTION This report describes the pre-tank replacement Site assessment results at a Shell Oil Company (Shell) retail gasoline station located at 880 Victor Road, Lodi, San Joaquin County, California (Figure 1) . This assessment was requested by Shell in preparation for the replacement of underground fuel-storage-tanks located at the Site. 1. 1 Purpose The purpose of the investigation was to: o Characterize the Site subsurface and hydrologic conditions. o Assess the presence of petroleum hydrocarbons (if any) in the soil beneath the Site. o Verify the soil conditions at the location of the new underground fuel-storage-tank location. o Evaluate the need for further assessment and/or mitigation of petroleum constituents in soil and ground water beneath the Site, prior to the tank closure/replacement. 1.2 Scope The scope of work conducted during the assessment is summarized below. o On August 24 and 25, 1989 a total of fourteen soil borings were advanced using hollow-stem-auger techniques to depths ranging from 11 feet to 26 feet below grade in the area of the existing underground fuel-storage-tanks and piping, and the proposed underground fuel-storage-tank locations. o Soil samples were recovered at five foot intervals in soil borings B-1 through B-4 beginning at five feet below grade according to the methods described in section 4 . 0. o Soil samples were recovered from the bottom of the remaining soil borings and soil types were described from grab samples collected from the augers. o Soil samples were recovered in brass tubes according to methods described in Appendix A. o Recovered soil samples were classified according to the Unified Soil Classification System and a log of each soil boring was generated.