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19 March 1999 <br /> AGE-NC Project No. 98-0471 <br /> Page 9 of 12 <br /> 4.1.2. Equipment Decontamination <br /> Prior to each sample collection, all sampling tools used for sample collection will be thoroughly <br /> rinsed with clean water after being washed with a solution of Alconox. <br /> 4.2. MONITORING WELL INSTALLATION <br /> Soil borings will be advanced using 8" hollow-stem auger drilling techniques. Soil borings will be <br /> advanced to 15 feet bsg to be completed as ground water wells with approximately five-feet of well <br /> screen. <br /> Soil cuttings generated during drilling of the soil borings will be contained in Department of <br /> Transportation (DOT)-approved 55-gallon drums or within plastic, which will be appropriately <br /> labeled for storage. Drums containing soil, plastic covered soil and decontamination water will be <br /> stored on-site pending appropriate removal and disposal. <br /> 4.2.1 Soil Sampling Procedures <br /> Soil samples will be collected from each soil boring at five-foot intervals.Relatively undisturbed soil <br /> samples will be collected in each of the borings using a California modified split-spoon sampler <br /> fitted with 2-inch diameter,6-inch long brass sleeves. Upon removal from the sampler, the sample <br /> sleeve is separated. The exposed ends of the second sleeve will be covered with Teflon sheets, <br /> capped and sealed with tape. Soils sampled in the borings will be visually classified by an AGE <br /> geologist in accordance with the Unified Soil Classification System (USCS). Additionally, soil <br /> samples will be field screened for the presence of VOCs using an OVM. <br /> Following sample collection, each preserved sample sleeve will be labeled with the boring location, <br /> depth,time, date and sampler's initials. Appropriately sealed and labeled samples will be placed in <br /> a chilled container under ice and transported under chain-of-custody procedure to a DHS-certified <br /> laboratory. <br /> 4.2.2. Monitoring Well Completion <br /> The monitoring well boring will be completed by using the hollow-stem augers as tremmie and <br /> centralizing agent. Following the termination of the soil boring,a 2-inch diameter Schedule 40 PVC <br /> 0.010-inch slotted well screen and casing will be installed. A 5-foot section of well screen will be <br /> installed extending approximately 5 fee to 10 feet below the ground water table from a depth of 10 <br /> Advanced GeoEnviron mental,Inc. <br />