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3.0 SITE INVESTIGATION <br /> This section describes the proposed methodologies for further evaluating the condition of the <br /> subsurface in the areas of concern at the AASF, CSMS and OMS. Included in this section are <br /> descriptions of the proposed field methods and procedures, laboratory analyses, and storage and <br /> disposal of investigation derived wastes (IDV). <br /> 3.1 PERMITTING <br /> Permits will be obtained from the PHS-EHD for em iromnental borings. Other permits are not <br /> anticipated. <br /> 3.2 UNDERGROUND UTILITY CLEARANCE <br /> As required by federal law,Underground Service Alert(USA)will be notified 72-hours prior to <br /> field work. Boring locations will be marked in white paint to allow USA participants to identify <br /> known utilities in the boring areas. In private property areas, an underground utility location <br /> contractor will be used to locate subsurface features in boring areas. <br /> 3.3 BORINGS <br /> The following section discusses the methods and procedures that will be to assess the condition <br /> of soil and groundwater in the areas of concern. <br /> 3.3.1 Boring Location <br /> To characterize the extent of impacted soil and assess the condition of underlying groundwater, a <br /> total of seven borings will be drilled at the locations shown in Figures 3 and 4. The soil borings <br /> will be drilled using a truck mounted, hydraulic, direct-push rig or hand-augered if access is <br /> limited. All non-dedicated drilling and sampling equipment will be cleaned prior to use. The <br /> following discusses the boring locations at each of the areas of concern. <br /> Army Aviation and Support Facility(AASF) <br /> Areas of concern at the AASF comprise the condition of groundwater in the area of the former <br /> 5,000-gallon fuel USTs removed in 1990 and a minor release of fuel to soil occurring in April <br /> 2002. <br /> One boring (B28) will be used to assess the impact to soil from a restricted release of fuel to soil <br /> (approximately 5 gallons, impacting an area of approximately 20 square feet). The boring will <br /> be advanced through the area of soil impact to a maximum depth of 45 feet bgs. A maximum of <br /> four soil samples and one grab-groundwater sample will be collected from the boring. The soil <br /> and groundwater samples will be analyzed for TPH-g, TPH-d, TPH-j, BTEX and five fuel <br /> 6 <br /> 3027-03/104700.4766.230/JUL23'03 <br />