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11 May 2009 <br /> AGE-NC Project No. 09-1692 <br /> Page 2 of 6 <br /> of Mines and Geology, 1977). <br /> The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the <br /> principal sources of domestic ground water in the 13,500-square mile San Joaquin Valley Ground <br /> Water Basin (Basin 5-22). <br /> 2.2. GROUND WATER DEPTH AND FLOW DIRECTION <br /> Based on information obtained from a nearby site(1033 West Charter Way,Stockton),ground water <br /> depth in the vicinity of the subject property is approximately 18 feet bsg. However, historically, <br /> ground water has varied from approximately 10 feet to 30 feet bsg in the vicinity of the site. <br /> Prevailing ground water flow direction in the area of the site site is inferred to be toward the east. <br /> However, flow direction may be both locally and seasonably variable. <br /> 3.0. SCOPE OF WORK <br /> AGE proposes to advance ten shallow soil borings at the site. Eight of the borings will be advanced <br /> around the perimeter of the suspected impact area to depths of approximately 10 feet bsg. Two <br /> borings will be advanced to depths of approximately 20 feet bsg near the product piping. Soil and <br /> grab ground water samples will be collected from selected borings. Proposed boring locations are <br /> illustrated on Figure 2. <br /> The scope of the work will include: <br /> • Permitting and pre-field work activities; <br /> • Soil boring advancement; <br /> • Soil and grab ground water sample collection and analysis; <br /> • Report preparation <br /> Each of these task are detailed below. <br /> 3.1. PERMITTING AND PRE-FIELD WORK PREPARATIONS <br /> Applicable soil boring permits will be obtained from the San Joaquin County Environmental Health <br /> Advanced GeoEnvironmental,Inc. <br />