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15 August 2002 <br /> AGE-NC Project 02-0946 <br /> Page 4 of 7 <br /> 3.2.2. Ground Water Sampling and Analysis <br /> A grab ground water sample was collected from probe boring PB-2 using a temporary PVC screen. <br /> The probe rods were advanced to approximately 41 feet bsg. The hollow steel rods were then pulled <br /> out, and a screened casing was inserted into the saturated zone. Ground water was allowed to enter <br /> the casing, and samples were retrieved using a modified PVC tubing bailer. Sufficient sample was <br /> collected from each boring to fill three 40-m1 EPA-approved volatile organic analysis (VOA) vials <br /> containing 0.5 ml 18% hydrochloric acid as a sample preservative and one 1-liter amber bottle. <br /> Ground water sample containers were labeled with probe boring designation, date, time, and <br /> sampler's initials. The preserved samples were logged on a chain-of-custody form, placed in a <br /> chilled container and transported to CTEL for analysis for: <br /> • TPH-g and TPH-d in accordance with EPA Method 8015 Modified; <br /> • Volatile organic compounds (VOCs) in accordance with EPA Method 8260B. <br /> 3.2.3. Equipment Decontamination <br /> Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly <br /> rinsed with clean water after washing with a solution of Alconox. Geoprobe rods were thoroughly <br /> cleaned prior to soil probe boring advancement. <br /> 3.2.4. Boring Abandonment <br /> Following sample collection, each soil boring was abandoned by backfilling each boring to surface <br /> grade using Portland Type 1/II. Abandonment activities were performed under observation of the <br /> EHD. <br /> 4.0. FINDINGS <br /> Soil descriptions were utilized to construct the site geological model; laboratory analysis of soil and <br /> ground water samples were utilized to assess the petroleum hydrocarbon-impact on soil and ground <br /> water. <br /> Advanced GeoEnvironmental,Inc. <br />