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10 April 2002 <br /> AGE-NC Project No. 02-0912 <br /> Page 2 of 4 <br /> DRILLING AND SAMPLE COLLECTION <br /> On 02 April 2002, three soil probe borings (P-1 through P-3) were advanced at the site as part of <br /> assessment activities.The field work was conducted as outlined in the AGE-prepared,Phase HSite <br /> Assessment Work Plan, dated 22 March 2002. <br /> Soil probe borings P-1 through P-3 were advanced utilizing a truck-mounted Geoprobe 5400, <br /> equipped with 1.125-inch diameter probe rods with an attached 2.15-inch diameter soil sampler, <br /> using "direct push" technology. The three borings were advanced vertically to depths of 48 feet <br /> below surface grade(bsg) for collection of soil samples and grab ground water samples. <br /> Soil samples were collected at 5-foot intervals to 30 feet bsg in borings P-1 through P-3;soil samples <br /> were not collected below 30 feet bsg. Each sample was collected utilizing a 1.125-inch Geoprobe <br /> soil sampling assembly loaded with four six-inch brass sleeves. After collection, the ends of the <br /> second brass sleeve were covered with Teflon sheets,capped and sealed with tape. The sleeve was <br /> labeled with soil probe boring location, depth, time, date and sampler's initials and then placed in <br /> a chilled container. <br /> Grab ground water samples were collected from probe borings P-1 through P-3 using a temporary <br /> PVC screen. The probe rods were advanced to a depth approximately four feet below the inferred <br /> water table(approximately 48 feet bsg).The hollow-steel rod assembly was pulled up approximately <br /> 4 feet,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 to fill five 40-m1 EPA-approved VOA vials containing 0.5 ml 18%hydrochloric acid as <br /> a preservative. The ground water sample containers were labeled with probe boring designation, <br /> date, time, and samplers initials and then placed in a chilled container. <br /> Following soil and ground water sample collection, all probe-boring locations were backfilled to <br /> surface grade with Portland cement. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to sample collection, Geoprobe soil sampling equipment was thoroughly rinsed with clean <br /> water after being washed with a solution of Alconox. Geoprobe rods were thoroughly cleaned prior <br /> to soil probe boring advancement. <br /> Advanced GeoEnvironmental,Inc. <br />