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02 July 2004 AGE-NC Project No. 04-1168 Page 2 of 5 respectively.The Province is bordered by the Coast Ranges to the west,the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east. The Great Valley has been filled with sediments derived from both marine and continental sources. Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet in the south central portion of the valley. The sedimentary formations range in age from Jurassic to Recent,with the older deposits being primarily marine in origin and the younger deposits being primarily continental. Continental-derived sediments were primarily deposited in lacustrine, fluvial,and alluvial environments with sediment sources being the mountain ranges surrounding the valley(Olmsted and Davis, 1961);the site itself is located on unconsolidated and semi-consolidated alluvium, lake, playa and terrace deposits of Quaternary age (California Division of Mines and Geology, 1977).Rocks composing the basement complex of the Province have not been completely defined but are believed to be metamorphic and igneous in origin. 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 nearest surface water feature to the site is the Stockton Diverting Canal, located approximately 1,600 feet northeast of the site.Based upon ground water maps prepared by the San Joaquin County Flood Control and Water Conservation District and well information obtained from nearby sites, ground water flow direction is variable near the site and is currently estimated to occur at a depth between 40 and 50 feet below surface grade(bsg). However,this may be greatly modified by local recharge and discharge patterns. 3.0. SCOPE OF WORK AGE proposes to collect soil samples to determine if petroleum hydrocarbon impacted soil and/or ground water is present beneath the site. The limited subsurface investigation will include the following tasks: • Permitting and pre-field work activities; • Soil and ground water sample collection and analysis; • Report preparation The preliminary site assessment tasks are discussed below. Advanced Geo Environmental,Inc.