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The three deep borings will be drilled to the water table, estimated to <br /> be at a depth of 115 to 140 feet below ground surface, and will be <br /> advanced 15 to 20 feet into the water-bearing zone. The deep borings <br /> will then be converted - to monitoring wells by the installation of <br /> 4-1/2 inch PVC casing. The casing will be slotted and will be blank <br /> from there to the ground surface. Packer tests will be conducted in <br /> these borings to determine in-situ permeability of the water-bearing <br /> zone. In-situ permeability tests will be conducted in two shallow <br /> borings (permeameters) to determine the permeability of the unsaturated <br /> zone lying immediately below the proposed landfill site. <br /> Borings will be advanced into soil and bedrock by air rotary drilling <br /> equipment to retrieve representative samples of soil and rock underlying <br /> the site and to detect ground water. Spot core samples will be col- <br /> lected of representative rock types in the unsaturated zone, and once <br /> ground water is detected in the deep borings, a continuous core sample <br /> will be collected for 20 feet into the water-bearing zone. If flowing <br /> sands or conditions of lost air circulation are encountered, we may have <br /> to convert to mud rotary drilling to complete the borings. Unforeseen <br /> drilling problems related to subsurface conditions may require abandon- <br /> ment of a particular boring and the need to drill a new boring. <br /> TASK 5 - Soil and Water Sampling and Laboratory Testing <br /> Up to six selected near surface soil samples obtained from exploratory <br /> borings will be tested in the laboratory to determine their engineering <br /> properties and suitability for use in landfill construction. <br /> Water samples will be collected from the monitoring wells to provide <br /> background data and will be analyzed for the following parameters: <br /> PRA 8610-22D II-5 <br /> E(T1C0(1 Associates_j <br />