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24 October 2001 AGE-NC Project No. 01-0877 Page 3 of 7 { Water Basin (Basin 5-22). The closest surface water feature is the Stockton Deep Water Channel located approximately 2,000 feet southwest of the site. 2.3. GROUND WATER DEPTH AND FLOW DIRECTION Based on data obtained from a nearby site(706 North El Dorado Street)the depth to ground water at the site is approximately20 to 25 feetbelow surface grade(bsg).The prevailing ground water flow direction in the vicinity of the site is estimated to be toward the northeast. However,flow direction may be both locally and seasonably variable. 3.0. SCOPE OF WORK The analytical results from the UST removal soil samples indicate that an unauthorized release of petroleum hydrocarbon compounds from the USTs has occurred at the site. AGE proposes to advance four soil borings to collect soil and in-situ grab ground water samples to assess the vertical extent of fuel components in the subsurface. The preliminary site assessment will consist of the following tasks: • Permitting and pre-field work preparations; • Soil sample collection and analysis; • Ground water sample collection and analysis; and • Report preparation. Each of these tasks is described below. 3.1. PRE-FIELD WORK PREPARATIONS A health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental Protection Agency, 1985). Prior to mobilization, each boring location will be clearly marked and a utility clearance obtained through Underground Service Alert.Drilling pemuts will be obtained from the PHS-EHD,who also will be notified at least 72 hours prior to initiation of field work to schedule grouting inspections. Advanced GcoEnvironmental,Inc.