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30 December 2008 <br /> AGE-NC Project No. 08-1636 <br /> Page 2 of 4 <br /> of 70 and 65 feet bsg, respectively, for collection of grab ground water samples. Locations of the <br /> soil borings are shown on Figure 2.Procedures for soil boring advancement,soil logging and sample <br /> collection are described in the following sections. <br /> 3.1.1. Soil Boring Advancement and Sampling <br /> Soil borings were advanced utilizing a van-mounted Geoprobe 5400 direct-push probing unit <br /> equipped with 1.25-inch diameter probing rods;the probing unit advances soil probe borings using <br /> a hydraulic hammer to drive soil and ground water sampling tools to specified depths. <br /> Soil samples were collected from each boring at discreet 5-foot intervals, beginning at 5 feet bsg, <br /> using a 1.25-inch diameter Geoprobe soil sampling assembly loaded with four 6-inch stainless steel <br /> sleeves. Collected soil samples were preserved by covering both ends of the sleeves with Teflon <br /> sheets, capping and sealing with tape. Each preserved sample sleeve was labeled with soil boring <br /> location, depth, time, date and sampler's initials and.was stored in a chilled container under ice. <br /> 3.1.2. Soil Logging <br /> After sample preservation, soil was extruded from remaining sleeves and field-screened, utilizing <br /> an organic vapor meter (OVM) equipped with a photo-ionization detector (PID: Thermo <br /> Environmental 580, 10.0 eV,calibrated to isobutylene). Soil was also visually classified on aboring <br /> log in accordance with the Unified Soil Classification System(USCS);soil boring logs are provided <br /> in Appendix C. <br /> 3.1.3. Grab Ground Water Sample Collection <br /> At the total depth of the borings P-1 and P-6, grab groundwater samples were collected utilizing a <br /> Geoprobe water sampling assembly fitted with a pre-cleaned, one-inch diameter 0.01-inch slotted <br /> temporary well screen. Ground water samples were extracted by lowering a Teflon hose equipped <br /> with a ball-valve through the hollow center of the push rods into the screen section. <br /> Ground water samples were transferred into four or five laboratory-supplied 40-milliliter (mi) <br /> volatile organic analysis (VOA) vials and one 1-liter amber glass container, both without <br /> preservative. After collection, the samples were properly labeled and placed in a chilled container <br /> under ice. <br /> Advanced GeoEnvironmental,Inc. <br />