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el M <br /> 15 November 2005 <br /> . AGE-NC Project No 95-0130 <br /> Page 6 of 10 <br /> 25 REGIONAL GEOLOGIC SETTING <br /> The property is situated within the Great Valley Geomorphic Province of California, a large, <br /> elongate, northwest trending, asymmetric structural trough The Great Valley Province has been <br /> filled with thick sequences of sediment ranging in age from Jurassic to Recent,creating a nearly flat- <br /> lying alluvial plain,extending from the Tehachapi Mountains in the south to the Klamath Mountains <br /> in the north The western and eastern boundaries of this province are comprised of the California <br /> Coast Range and the Sierra Nevada, respectively Rocks composing the basement complex of the <br /> province have not been completely defined but are believed to be metamorphic and igneous in origin <br /> The northern and southern portions of the Great Valley Province have been designated the <br /> Sacramento and San Joaquin Valleys, respectively <br /> Based on the General Soil Map from the San Joaquin County Soil Survey,published by the United <br /> States Department of Agriculture Soil Conservation Service in 1992, the site area is within the <br /> Jackson-Hallenbeck-Stockton (JHS) association The JHS soils are located within basins, and <br /> generally consist of moderate to poorly drained fine textured soils The soils are generally derived <br /> from both marine and non-manne sediment, and are generally formed in alluvium derived from <br /> mixed rock sources <br /> The Modesto,Riverbank,Turlock Lake Formations and overlying recent alluvium are the principal <br /> source of domestic ground water in the 13,500 square-mile San Joaquin Valley Ground Water Basin <br /> (Basin 5-22) This basin is drained primarily by the San Joaquin River The nearest surface water <br /> feature in the vicinity of the property is the Stockton Deep Water Channel, located approximately <br /> 3,000 feet west of the property <br /> 3.0. SCOPE OF WORK <br /> To characterize and assess the lateral extent of petroleum-Impacted ground water east and southeast <br /> of the site, completion of the following tasks is required <br /> • Permitting and pre-field work activities, <br /> • CPT drilling and sample collection, <br /> • Laboratory analysis of samples, <br /> • Preparation of a report of findings <br /> Advanced GeoEnv►ronmental,Inc <br />