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Lo 06 August 2004 <br /> AGE-NC Project No. 04-1128 <br /> Page 4 of 6 <br /> 3.5. GROUND WATER SAMPLING <br /> V <br /> Grab ground water samples were collected from each soil boring using a temporary PVC screen.The <br /> r sample-from B-1 was collected such that the probe rods were advanced to approximately 60 feet bsg, <br /> L wherein the hollow steel rods were then pulled out, and a'screened casing was inserted into the <br /> saturated zone. The sample from B-2 was collected such that the probe rods were fitted with a <br /> retractable ground water screen and advanced to the total depth of the boring;the rod was then pulled <br /> IL upward to allow ground water to flow into the screen. Ground water was allowed to enter the casing, <br /> and samples were retrieved using a modified PVC tubing bailer. Sufficient sample was collected <br /> from each boring to fill four 40-m1 EPA-approved volatile organic analysis,(VOA)vials containing <br /> L 0.5-m1 18% hydrochloric acid as a sample preservative and one' 1-liter amber bottle without the <br /> sample preservative. Ground water sample containers were labeled,with probe boring designation, <br /> date, time, and sampler's initials..The samples we're-logge'd on a chain of custody form,placed in a <br /> L chilled container and transported.to CTEL for analysis. <br /> 3.6. GROUND WATER SAMPLE ANALYSIS <br /> { Each grab ground water sample was analyzed for: <br /> L <br /> • TPH-d in accordance with EPA Method 8015 Modified; and <br /> L BTEX and MTBE in accordance with EPA Method SW846 8021. <br /> { r <br /> L <br /> 3.7. 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 boring advancement. <br /> f 4.0. FINDINGS <br /> Soil descriptions were utilized to.construct the site geological model;laboratory analysis of soil and <br /> • <br /> ground water samples were utilized to assess the petroleum hydrocarbon-impact on soil and ground <br /> L water... <br /> Advanced GeoEnvironmental,Inc. <br /> L - <br />