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was estimated based upon observations of drilling mud returned to the surface Cored soil samples <br />' were collected continuously between the depths of approximately 70 feet bgs to 135 feet bgs using <br /> a 94-millimeter core barrel sampler The continuous coring sampling method was employed in <br />' order to more accurately classify soil stratigraphy and Identify potential water bearing units below <br /> the shallow water-bearing zone The soil sample collected at a depth of approximately 110 feet bgs <br />' was submitted to Argon under chain of custody protocol to determine if gasoline constituents had <br /> Impacted soil at that depth <br /> Cuttings and nnsate generated during drilling activities were contained on site in lined 20 cubic yard <br />' roll off bins pending waste characterization <br />' Based upon site stratigraphy, well MW9(B) was Installed to a depth of approximately 130 feet bgs <br /> In order to screen across a water-beanng sand unit encountered between the depths of <br />' approximately 122 to 130 feet bgs The well was constructed using a 10-foot length of 4-Inch <br /> diameter, schedule 80 PVC screen (0 01-Inch slots), and approximately 122 feet of 4-Inch diameter <br /> schedule 80 PVC well casing to approximately two feet above the ground surface Centralizers <br /> were set at 40-foot Intervals starting from the bottom of the well <br /> Prior to Installing the well, the pilot hole was over-dulled to a depth of approximately 111 feet bgs <br />' using a 13 3/4 Inch diameter drill bit An 8 5/8 Inch diameter steel conductor casing led by a cement <br /> shoe was set to a depth of approximately 111 feet bgs Centralizers were set at 40-foot Intervals <br /> The bottom portion of the pilot hole (111-135 feet bgs) and the conductor casing were grouted from <br /> the bottom up though the cement shoe with Class II neat cement The cement was circulated to the <br /> surface and allowed to set for 60 hours <br />' After the conductor casing had set, the cement shoe was drilled out and the grouted pilot hole was <br /> over-drilled to a depth of 130 feet bgs using a 7 718 diameter rock bit The well annulus was filled <br />' from the bottom to approximately three feet above the top of the well screen with #2116 pre-washed <br /> silica sand emplaced using a tremae The filter pack was overlain directly by approximately five <br /> 1 feet of hydrated bentonite pellets overlain by neat cement, which was tremied from bottom to top <br /> �> The well was secured at the ground surface with an expandable, locking plug and an above grade, <br /> 1 8 <br /> data/groundze/tuiehurg/reports/mud_has weItreport.doc <br />