Laserfiche WebLink
kn KLEINFELDE-R <br /> File No. 20-3937-01 <br /> September 3, 1996 <br /> B-2.6 Soil Sample Selectign.for Laboratory Analyte <br /> The selection of soil sarnples'for laboratory analysis is based upon: 1) the project objectives <br /> and requirements, 2) qualitative field screening performed in the held 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 <br /> horizons Nvith significant potential [or contamination as indicated by the organic vapor <br /> detector, observations, and site history. Samples may be collected from regular intervals <br /> when Information on concent3'ations versus depth is desired. Samples that are not selected for <br /> laboratory analysis are held in sample control for possible future reference. When these <br /> samples are no longer needed, they are returned to the site and are combined with the soil <br /> cuttings generated during their collection. <br /> 13-2.7 Soil Bor-in« Closure and Soil Cutting, Disposal <br /> Soil borings are closed Immediately after the collection and logging of soil samples. Closure <br /> is accomplished by grouting the boring with a cement/bentonite slurry or as otherwise <br /> required. <br /> Drill cuttings will be placed in 55-gallon drums or wrapped in plastic and left on site for <br /> disposal by the Site owner. if requested, Kleinf lder can coordinate disposal.of soil and water <br /> with contractors after chemical analysis results are available. <br /> 13-3 GROUND WATER MONITORING <br /> B-3.1 Monitoring Well Cpnstrtiction <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 <br /> 40 PVC pipe. <br /> • The wells will be constructer[ in 8-inch diameter boreholes. <br /> i <br /> Well screen sections are perforated with 0.010- or .02-inch factory-cut slots. <br /> -['his parameter is assessed (and modified if required) after the boring logs and, <br /> If warranted, a sieve test has been performed and the results received. <br /> 0 The wells are generally screened from 5 feet above to 20 .feet below first <br /> ground water. The screen length is reduced if an aquitard with a minimum <br /> thickness of 5 feet is encountered. 1f an aquitard is encountered the well is <br /> 20-3937-01/MR960189 Page No. B-3 Copyright 1996, Kleinfelder, Inc. <br /> i <br />