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'*ago, ""low, 18 March 2002 AGE-NC Project No. 00-0729 Page 2 of 5 filled to its present elevation with thick sequences of sediment ranging in age from Jurassic to Recent, creating a nearly horizontal alluvial plain, extending from the Tehachapi Mountains in the south to the Klamath Mountains in the north. The western and eastern boundaries of this province are comprised of the California Coast Range and the Sierra Nevada,respectively.Rocks composing the basement complex of the province have not been completely defined but are believed to be metamorphic and igneous in origin.The northern and southern portions of the Great Valley Province have been designated the Sacramento and San Joaquin Valleys, respectively. The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the principal source of domestic ground water in the 13,500-square-mile San Joaquin Valley Ground Water Basin (Basin 5-22). This basin is drained primarily by the San Joaquin River. The nearest surface water feature in the vicinity of the subject property is McLeod Lake/Weber's Point, approximately 1.5 miles toward the west-southwest. 2.3. GROUND WATER DEPTH AND FLOW DIRECTION The estimated depth to ground water at the subject property is approximately 50 to 60 feet below surface grade (bsg), based on the map titled Lines of Equal Depth to Groundwater, Spring 1999 published by the San Joaquin County Flood Control District and Water Conservation District (FCD&WCD) It is inferred from the map titled Lines of Equal Elevation of Groundwater, Spring 1999, also published by the FCD&WCD, that the local ground water flow is indeterminate at the subject property, but the property is in an area with a general ground water flow toward the east- southeast; this may be greatly modified by local recharge and discharge patterns. Ground water is considered to be of beneficial use and is utilized for domestic,industrial and commercial purposes. 3.0. SCOPE OF WORK AGE proposes to collect soil and ground water samples to investigate the areas of the former dispenser islands and USTs. The phase H 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; • Report preparation. Advanced GeoEnvironmental,Inc.