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Location S-20: In center of bottom of roadside ditch on east side of <br /> Dawes, approximately 100 feet south of extended south <br /> fenceline. <br /> Location S-21: On residential property between Dawes and Wagner, <br /> approximately 5 feet south of south fenceline. <br /> Location S-22: On residential property between Dawes and Wagner, <br /> approximately 100 feet south of south fenceline. <br /> If samples cannot be obtained within a 10 foot radius of the above <br /> locations, MCTC should be consulted to determine another nearby location or to <br /> abandon the sample location. Sample locations should be moved parallel to the <br /> fenceline and roadside or along centerline of ditch, if possible. <br /> J. H. Kleinfelder & Associates (Stockton, California) will conduct the <br /> soil sampling activities. MCTC will notify the DHS when Kleinfelder sampling <br /> personnel are identified. Similar procedures used in the previous South Yard <br /> ditch sampling activities (Soil Assessment Plan, submitted to DHS in December, <br /> 1984) will be used during this sampling activity. Sampling will entail the <br /> use of disposable sampling devices to take surface samples and hand-augers to <br /> take samples at 0.25, 0.50, 1 and 2 feet below land surface. The sampling <br /> equipment will be decontaminated between each hole and each depth interval, if <br /> required to prevent cross contamination. Samples will be analyzed using a <br /> phased approach for the following constituents in accordance with the Soil <br /> Assessment Plan: <br /> o Arsenic <br /> o Copper <br /> o Chromium (hexavalent) <br /> o Chromium (total) <br /> Selected depth samples, as indicated in Table 1, will be shipped for <br /> analysis. Other samples will be archived for future arsenic, copper and total <br /> chromium analysis if warranted by Phase I analytical results. <br /> Canonie Environmental, Weston, California Analytical Laboratory or other <br /> laboratories will analyze the samples for the above constituents. Quality <br /> control, safety, and chain-of-custody procedures will be followed as <br /> stipulated in the Soil Assessment Plan. Duplicate samples will be made for <br /> 15 percent of all samples taken. In addition, the analytical laboratory will <br /> use internal QA/QC procedures including spikes and surrogate recovery <br /> information to ensure valid analytical data. <br /> MCTCCUR <br />