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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 bas. 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 />