Laserfiche WebLink
30 June 1999 <br /> AGE-NC Project No.95-01$5 <br /> Page 3 of 6 <br /> igneous in origin. The northern and southern portions of the Great Valley Province have been <br /> designated the 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-marine 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 StanisIaus River, located approximately 1,500 feet south <br /> of the site. <br /> 2.4. GROUND WATER DEPTH AND FLOW DIRECTION <br /> In June 1999, ground water depth was measured at approximately 16 feet below surface grade (bsg) <br /> Review of historical depth to ground water information indicates that ground water depth near the <br /> site has fluctuated between approximately 15 and 20 feet bsg. Ground water flow direction at the site <br /> can vary seasonally. However, the overall regional flow direction is northeast. <br /> 3.0. SCOPE OF WORK <br /> Based upon analytical and field data collected from previous investigation of the farmer UST area, <br /> the PHS-EHD is requiring a corrective action plan to evaluate feasibility and cost effectiveness of <br /> several remediation alternatives. AGE proposes to perform a feasibility pilot study at the site. <br /> Additionally, AGE proposes to four soil probe borings as part of ongoing investigation to further <br /> delineate petroleum hydrocarbon ground water.impact. <br /> The scope of work will consist of the following tasks: <br /> Permitting, planninge and pre-field work activities; <br /> • Soil boring installation; <br /> • Pilot study; <br /> • Preparation of Corrective Action Plan. <br /> Advanced GeoEnvironmen tal,1ns. <br />