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AmerAlla Inc MWB-2 Dulling antl ComDlet~on Report <br />(;KOC~DWA"f€R H1 DROLOGI' <br />Un-.Sire [)hservatiars of Discliurge urrd l3usii 11'uter Quuiih <br />\4easurablr groundwater discharge white dulling was first noted by drilling personnel at <br />approximately'_75 feet in the Uinta FurmatiomGreen River Formation transition rune I~fable 41. <br />1_ang personnel periodically noted the volume of discharge water down to 1.075 feet. From <br />1,075 feet to TD 11.398 feed groundwater discharge data were collected every 10 to 4(1 feet by <br />personnel from Daub b'c Associates. Inc.. along with water samples for geochemical analysis <br />(discharge Clow rates, total dissolved solids, cunductiviq•, temperature. and pl-I'1. Dischar¢e <br />measurements greater than about 10 gpm were taken be the drilling personnel (timed volume <br />mcrcase in holding tan}: attached to the shale shakers. whereas those less than 10 gpm were made <br />~vrth a graduated bucket. Variations in these data ITabin 41 arc summarized in Figure R and to <br />the tollowtng statistical table: <br /> 11in. Maz. lgean Stand. <br />Parameter 1 Value Value Value Des. <br />Discharge lgpml 10 7 211 143 79 <br />Cotal Dissolved Solids Ippmr ~) S00 Soo S00 u <br />('unductivity (NS cml 10 900 1,000 987 32 <br />Frmperaturc (`CI 11 16.9 24,9 18.5 _'.7 <br />pH 10 7.99 8.68 8,17 0?0 <br />Based un estimates by the drillers 1 (able 2), groundwater discharge was less than 10 epm <br />between 55 and 675 fret and increased from '_0 to 211 gpm between 675 and 1,375 feet <br />(Figure 8). The highest discharge rates (greater than 100 gpm 1 occurred in the lower R-8 7..one. <br />A-Groove, and Mahogany Zune. After casing was Set (1,375 feet), drilling to TD (1.398 feet) <br />encountered Aow rates of approximately 32.5 gpm t}om the B-Groove. <br />SluNc W'aler-Level:M1feusurements <br />Static water-level measurements were nut made during the drilling of btWB-'_. Fhe first reading <br />1237.G feet below ground level) seas taken on lanuan• 14. 2000, at 02:50. :\t this time, drilling <br />was underway at nearby Mw'D-_' (at a depth of 1,35> feet), Thus, the initial reading in MWB-'_ <br />reflects some drawdow•n produced by seater withdrawal from IviW'D-2. As drilling con[inued in <br />5 <br />h 1 <br />