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} <br /> l <br /> KLEINFELDER <br /> L <br /> 2 SCOPE OF WORK <br /> f <br /> Seven soil borings will be drilled on the project property. Locations for the soil borings are <br /> shown on Plate 3. The first soil boring will be drilled in the vicinity of soil sample P-69749 <br /> to a depth of approximately 20 feet. This boring will be sampled continuously to assess the <br /> lithology in the potentially contaminated area and investigate the depth to ground water at <br /> the site. Once the depth to ground water has been assessed, the boring will be backfilled <br /> �. with 5 gallons of bentonite pellets and grouted back to the surface with a bentonite/cement <br /> slurry using tremie pipes. Boring through obviously contaminated soils will not be <br /> advanced into ground water to preclude artificial introduction of contaminants into ground <br /> water. <br /> The soil borings will be drilled with a truck-mounted drill rig equipped with 6- or 8-inch <br /> diameter hollow-stem augers. During the drilling, an experienced environmental geologist <br /> will classify the subsurface sediments, log the boreholes, collect sediment samples and <br /> preserve samples for laboratory analysis. Prior to drilling, an underground utility location" <br /> survey shall be conducted for the project property by All-American Locators (or <br /> equivalent). <br /> To minimize the potential for cross-contamination, all augers and associated equipment <br /> e.. will be steam cleaned prior to the drilling of each borehole. All sampling equipment will <br /> also be cleaned with a detergent wash and rinsed with distilled water prior to the collection <br /> a of each soil sample. <br /> 2.1 SOIL.SAMPLING PROCEDURES <br /> Soil samples will be collected for chemical analysis and to complete a lithologic log. <br /> Samples will be collected at 5-foot intervals starting at a depth of 5 feet below the ground <br /> surface. Sample collection will proceed to a depth of approximately 15 feet or petroleum <br /> hydrocarbons are not indicated in two consecutive sampling intervals. <br /> Soil samples will be collected by advancing the boring to a point immediately above the <br /> sampling depth and then driving a Modified California Sampler lined with three brass <br /> tubes into the undisturbed soil. The sampler will be removed from the bottom of the <br /> 146-88-2051 2 <br />