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used only as a qualitative field measure of potential soil contamination. The borings will be sealed <br /> using a neat cement grout. <br /> The recovered soil core will be examined by a geologist. The geologist will visually observe the soil <br /> and record the soil characteristics on a field log. The soil description will be based on the Unified <br /> Soil Classification System. <br /> 3.1.2 Grab Groundwater Sampling <br /> A vehicle-mounted, hydraulically-powered soil probing machine (Geoprobe)that utilizes static force <br /> and percussion to advance small diameter sampling tools into the subsurface will be used to collect <br /> water samples. When the final depth of the boring is reached,the drill casing will be removed, and a <br /> temporary well casing with 10 feet of screen will be placed in the hole. <br /> Dedicated tubing and a peristaltic pump will be used to collect a water sample from each of the <br /> temporary wells. Water samples will be placed in appropriate containers with appropriate <br /> preservative. Sample containers will be filled to the top, capped, and sealed. <br /> 3.2 Surveying <br /> Sample locations will plotted on a map and distances from known reference points measured and <br /> recorded. The measurements will be used to create a sample location map for the PEA report. A <br /> survey by a licensed land surveyor is not proposed for this sampling project. <br /> 3.3 Decontamination <br /> To prevent potential cross-contamination between sampling points, all measuring, purging, and <br /> sampling equipment will be washed using a phosphate-free detergent solution, rinsed in tap water, <br /> and finally rinsed in distilled or deionized water. <br /> 3.4 Waste Management <br /> Investigation derived wastes will consist of soil cuttings produced from the borings installed to <br /> collect soil and groundwater samples and purge water from groundwater sampling. These wastes <br /> will be drummed, labeled, and properly disposed. Documentation of the waste disposal will be <br /> placed in the site investigation report. <br /> 3.5 Sample Handling <br /> 3.5.1 Sample Containers <br /> Sample containers requirements will follow those outlined in the USEPA's publication SW-846, <br /> Test Method for Evaluating Soil Wastes: Physical/Chemical Methods, Third Edition, Final Update <br /> III,December 1996. <br /> Soil samples will be collected directly from the sample liner. Following the Geoprobe driving <br /> operation, the sampler will be retrieved from the boring and the sample liner removed. A portion of <br /> the soil sample liner will be selected and prepared for shipment to the analytical laboratory. The <br /> section of liner obtained for analyses will be sealed with Teflon sheets and air-tight end caps. <br /> 1163-3 2014 0617 PEn\N P 3 9 GRI <br />