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17 October 2007 AGE -NC Project No. 07-1569 Page 2 of 5 marine in origin and the younger deposits being primarily continental. Continental -derived sediments were typically deposited in lacustrine, fluvial, and alluvial environments with sources being the mountain ranges surrounding the valley. The site is located on unconsolidated and semi -consolidated alluvium, lake, playa, and terrace deposits of Quaternary age. The Modesto, Riverbank, and Turlock Lake Formations and overlying Recent alluvium are the principal sources of domestic ground water in the 13,500 -square mile San Joaquin Valley Ground Water Basin (Basin 5-22). The San Joaquin River is the nearest surface water feature in the vicinity of the property, located approximately 1,500 feet east of the site. The San Joaquin River is primarily used for commercial and recreational boating, as well as agriculture. The channel contains water continually and has a potential tidal effect upon ground water depth or flow direction in the area. 3.0. SCOPE OF WORK The proposed scope of work will include the following tasks: • Planning and pre -field work activities. • Soil excavation and sample collection/analysis. • Excavation backfilling. • Soil disposal, if necessary. • Report preparation. 3.1. PRE -FIELD WORK ACTIVITIES 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, the area of excavation will be clearly marked and an utility clearance obtained through Underground Service Alert. Permits required from other agencies will be procured. 3.2. SOIL EXCAVATION A series of trenches and/or potholes will be excavated on in order to determine the extent of the Advanced GeoEnvironmental, Inc.