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28 August 2003 <br />AGE -NC Project No. 03-1063 <br />Page 4 of 7 <br />organic vapors (OV) using a photo -ionization detector (PID). Soil considered to be "clean" was <br />segregated from soil that had the presence of OVs or petroleum odors ("contaminated"). Soil was <br />excavated to a depth of approximately 14 feet bsg. Ground water was not encountered during <br />excavation, although soil encountered at the bottom of the excavation was semi -saturated. OVs were <br />not detected during excavation; however, hydrocarbons odors were noted at depths between <br />approximately 8 feet bsg and 14 feet bsg. <br />3.2. SOIL SAMPLING COLLECTION <br />A total of six soil samples were collected from the floor and sidewalls of the excavation using the <br />backhoe bucket. Each discrete soil sample was collected using a metric soil sampler. The soil <br />sampler was loaded with two clean, 2 -inch by 3 -inch diameter brass sleeves. Upon collection, the <br />ends of the lead sleeve were covered with Teflon sheets, capped and sealed with tape. Each sample <br />sleeve was labeled with an individual identification, depth, time, date and sampler's initials. <br />Appropriately sealed and labeled samples were placed in a chilled container under ice and <br />transported under chain -of -custody procedure to a state -certified laboratory. <br />Soil samples were not collected from the excavated (stockpiled) soil. <br />3.3. ANALYTICAL PROTOCOL <br />The excavation soil samples were analyzed for the following constituents: <br />• Total petroleum hydrocarbons as hydraulic fluid (TPH-hf) in accordance with EPA Method <br />8015 Modified; <br />• Methyl -tertiary butyl ether (MTBE), Benzene, toluene, ethyl benzene and total xylenes <br />(BTEX) in accordance with EPA Method SW846/8021; and <br />• Cadmium, Chromium, Lead, Nickel and Zinc in accordance with EPA Method <br />SW846/601013. 11 <br />3.4. EXCAVATION BACKFILLING AND SOIL DISPOSAL <br />After completion of all excavation and sampling activities, the excavation was backfilled and <br />compacted using a combination of clean fill sand and "clean" overburden material segregated during <br />excavation. A total of approximately 40 tons of clean imported material was used for backfill. <br />Advanced GeoEnvironmental, Inc. <br />