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h� KLEINFELDER <br /> B-2 6 Soil Sample Selection for Laboratory Analysis <br /> The selection of soil samples for laboratory analysis is based upon 1) the project objectives and <br /> requirements, 2) qualitative field screening performed in the field using the organic vapor <br /> detector, and 3) field observations such as lithology, odor, discoloration, or high moisture <br /> content Generally, samples are submitted from the bottom of the boring and from soil horizons <br /> with significant potential for contamination as indicated by the organic vapor detector, <br /> observations, and site history Samples may be collected from regular intervals when <br /> information on concentrations versus depth is desired Samples that are not selected for <br /> laboratory analysis are held in sample control for possible future reference When these samples <br /> are no longer needed, they are returned to the site and are combined with the soil cuttings <br /> generated during their collection <br /> B-2 7 Soil Boring Closure and Soil Cutting Disposal <br /> Soil borings are closed immediately after the collection and logging of soil samples Closure is <br /> accomplished by grouting the boring with a cement bentonite slurry or as otherwise required <br /> Drill cuttings will be placed in 55-gallon drums or wrapped in plastic and left on site for disposal <br /> by the site owner If requested, Kleinfelder can coordinate disposal of soil and water with <br /> contractors after chemical analysis results are available <br /> B-3 GROUNDWATER MONITORING <br /> B-3 1 Monitoring Well Construction <br /> Construction details for shallow ground water monitoring wells are as follows <br /> • The well casing will be 2-inch inside diameter, flush threaded joint, schedule 40 <br /> PVC pipe <br /> The wells will be constructed in 8-inch diameter boreholes <br /> • <br /> Well screen sections are perforated with 0 010- or 02-inch factory-cut slots This <br /> parameter is assessed (and modified if required) after the boring logs and, if <br /> • warranted, a sieve test has been performed and the results received <br /> 40-Y P9179/40 I OPO 19 9 <br /> Copyright 2000 Kleintelder Inc <br />