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18 December 1997 • AGE-NC Project No 95-0173 Page 4 of 10 casing(0 020-inch slot) Each dual-completed IAS well was Installed by placing PVC well casing through the hollow stem of the augers through the total depth of the boring The augers were Incrementally raised as a#3 Lonestar Lapis Luster sand (filter pack) was slowly poured down the annulus between the well casing and the Inner wall of the hollow stem auger The filter pack was placed adjacent to the screened casing from the bottom of the boring to a point approximately 2-feet above the top of the screen Following placement of the filter pack, a surge block was inserted into the PVC casing and lowered then raised (surged) repeatedly for approximately 10 minutes Thereafter,a minimum of five feet of bentonite coded pellets(Pell plug)were placed above the filter pack and hydrated with clean tap water to serve as an annular seal between the shallow screened interval (Interval A) and the deep screened interval (Interval B) The shallow screened interval was next installed by placing PVC well casing through the hollow stem of the augers to the top of the annular seal The augers were incrementally raised as a filter pack was slowly poured down the annulus between the well casing and the inner wall of the hollow stem auger The filter pack was placed adjacent to the screened casing from the top of the annular seal to a point approximately 2 feet above the top of the second screened casing Following placement of the filter pack, a surge block was Inserted into the shallow screened interval and surged repeatedly for approximately 10 minutes Thereafter, a minimum of three feet of bentonite chips were placed above the second filter pack and hydrated with clean tap water to serve as a shallow screened Interval annular seal The remaining 10 annular space was sealed with Portland Type II cement As-built well construction diagrams are included as Figure Nos 6 and 7 - Well Construction Diagrams 1 2 4 1 SURVEYING A reference point was marked on the top of each IAS well head, and surveyed to the nearest 0 01- foot relative to previously surveyed monitoring wells to determine the elevation The results of the well survey are contained in Table 1 2 4 2 WELL DEVELOPMENT IAS wells AW I(Intervals A and B) and AW2 (Intervals A and B) were developed utilizing a two stage submersible pump Ground water was purged from each screened interval until the water Produced was essentially sediment free Approximately 25 gallons of ground water were purged from each screened interval Purged ground water was containerized in properly labeled D O T model E17H 55-gallon drums and stored on-site in an area lacking public access IAS wells AW 1 (Interval B) and AW2 (Interval B)were allowed to recover for a minimum of one hour prior to collection of ground water samples Ground water samples were collected from each Advanced GeoEnvironmental,Inc I