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Y • Site Assessment Work Plan El Dorado at Lindsay 342 & 348 North El Dorado Street, Stockton, California 1.0. INTRODUCTION At the request of Mr. Hai Le, agent for United Furniture Company,Advanced GeoEnvironmental, Inc. (AGE) has prepared the enclosed work plan for the assessment of an unauthorized release of petroleum-hydrocarbons from an oil water separator formally located at 342&348 North El Dorado Street, Stockton, California, (the site). The location of the site is illustrated on Figure 1 and a plan of the site is illustrated on Figure 2. The scope of work includes advancement of four soil probe borings in the area of the former oil water separator,collection of soil and groundwater samples for laboratory analysis,and preparation of a report of findings. 2.0. BACKGROUND As a result of research performed for a Phase I Environmental Site Assessment of the subject properties,AGE identified an oil water separator that posed a potential environmental concern. The separator, located in the southeast corner of the property, was partially filled with oil and sludge. AGE recommended the collection of soil samples below the structure and the analysis of the samples for petroleum hydrocarbons and volatile organic compounds. 2.1. SAMPLING AND ANALYSIS Prior to sample collection on 15 November 2001, AGE removed the sludge, and debris from the structure utilizing a pump truck from American Valley Waste Oil,Inc.After removal of the interior contents, the oil -water separator structure was steam-cleaned as it was pumped. The floor of the separator was found to be in good condition, however, cracks were noted in the sidewalls. After clean out and inspection of the structure, AGE hand-augered a boring, HAI which was advanced immediately northwest of the separator. Due to subsurface conditions, the boring was angled toward the northwest to a depth of approximately 8 feet below surface grade(bsg). Samples were collected at depths of 2, 5, 6 and 8 feet. Selected samples were submitted to a DHS-certified laboratory.Two samples from the boring were analyzed for total petroleum hydrocarbons (TPH-all) including gasoline, diesel, motor oil, and purgeable aromatic compounds - benzene, toluene, ethyl benzene and total xylenes (BTEX). One sample from the boring was analyzed for volatile organic compounds (VOCs). Advanced GeoEnvironmental,Inc.