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AmerAlia, Inc. <br />MWD-1 Drilling and Completion Report <br />In the R-6 and L-5 Zones, many of the mazlstone and oil shale cuttings contained pits and small <br />vugs produced by dissolution of nahcolite (NaHCO3) crystals (prior to drilling). Pyrite is <br />commonly associated with the rims of the pits and vugs. <br />PENETRATION RATES <br />Penetration-rate data were collected by Lang personnel between depths of 35 and 1,695 feet <br />(Table 4). Additional penetration-rate data, which were collected by personnel from Daub & <br />Associates, Inc., for the interval between 975 and 1,731 feet, can be found in Table 3. In <br />Table 4, the elapsed time is broken down into actual drilling time and the time to make a <br />connection, plus water sampling and maintenance time. Penetration-rate data from Tables 1 <br />and 2 are summarized graphically in Figure 6. As documented in Figure 6, penetration rates <br />during drilling of the 10-inch-diameter leg of the hole (18 to 875 feet) ranged from 40 to 120 feet <br />per hour (ft/hr), and averaged 68.5 ft/hr, whereas for the 9-e'-inch-diameter leg (875 to 1,710 feet) <br />the range was from 13.3 to 60.0 ft/hr, and the average was 30.2 ft/hr. The average penetration <br />rate for the 4'-s-inch-diameter leg (1,710 to 1,731 feet) was 5.4 ft/hr. <br />Overall, the penetration rates remained relatively uniform (60 to 80 ft/hr) between 18 and about <br />775 feet, but decreased significantly below 775 feet (20 to 60 ft/hr). The reduced penetration <br />rates were caused mainl}~ by high rate of groundwater discharge (greater than 100 gpm). <br />GROUNDWATER HYDROLOGY <br />On-Site Observations ojDischarge and Basic Water Quality <br />Measurable groundwater dischazge while drilling was first noted at approximately 315 feet in the <br />Uinta Formation-Green River Formation transition zone (Table 6). Lang personnel periodically <br />noted the volume of dischazge water down to 1,675 feet. From 975 feet to TD (1,731 feet) <br />groundwater discharge measurements were collected by personnel from Daub & Associates, Inc. <br />Water samples collected between 975 and 1,731 feet were analyzed on site for dischazge flow <br />rates, total dissolved solids (TDS), conductivity, temperature, and pH. Dischazge measurements <br />greater than about 10 gpm were taken by the drilling personnel (timed volume increase in <br />