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• 14 August 2001 AGE-NC Project No 98-0511 Page 5 of 7 split-spoon sampler fitted with 2-Inch diameter, 6-inch long brass sleeves Upon removal from the sampler,the sample sleeves will be separated and the exposed ends of the first sleeve will be covered with Teflon sheets, capped and sealed with tape Soils encountered in the borings will be visually classified by an AGE geologist in accordance with the Unified Soil Classification System (USCS) Additionally, soil samples will be field screened for the presence of volatile organic compounds using an organic vapor meter (OVM) Following sample collection,each preserved sample sleeve will be labeled with the boring location, depth, time, date and the sample collector's initials Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to a DHS-certified laboratory 4 2 MONITORING WELL INSTALLATION Following completion of drilling and sampling of the pilot boring,2-inch diameter Schedule 40 PVC 0 010-inch slotted well screen and casing will be installed into the boring Based on the depth of the boring and the ground water table, a 20-foot length of well screen will be installed It is anticipated that the well section will be placed across the observed water table with approximately 15 feet of screen section installed within the saturated interval and approximately five feet of screen section extending above the water table After installing the well casing, filter pack material consisting of pre-washed #2/12 Lonestar sand will be added from the bottom of the borehole to approximately two feet above the screened interval Following placement of the filter pack, the well will be surged to assist in settling the filter pack Additional sand will be added if settling occurs A nominal two-foot thick bentonite seal will be placed above the filter pack to minimize the potential for grout to penetrate into the screened section of the well The bentonite seal will be formed by pouring bentonite chips into the annulus and allowing them to settle on the filter pack Bentonite chips will be hydrated using five gallons of water The bentonite chips will be allowed to hydrate for a minimum of one-half hour prior to grouting The remaining annular space will be filled to within a foot of the ground surface with a cement grout The grout mixture will consist of type FII portland neat cement and not more than 6 gallons of water per 94-pound sack of cement The grout will be placed by pumping through a tremmie pipe Grouting procedures will be inspected by EHD personnel A traffic-rated well box will be installed over the well casing The proposed well design is shown in Figure 3 i Advanced CeoEnvironmental,Inc