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History Well 29-4 <br />A Groove <br />• The A Groove well (29-4A) was installed after the cement ade <br />uatel <br /> q <br />y <br /> cured, and completed with a 10-ft, 2 3/8-inch-OD, NSF-6, fiberglass, #20 <br /> slot screen at 750 to 760 ft in ahigh-porosity zone near the center of the A <br /> Groove. <br /> The silica sand filter pack was placed from 697 to 772 ft. <br />• Bentonite hole plug was placed immediately above and below the sand <br /> filter pack at 548 to 697 ft and 772 to 810 ft, respectively. <br />• All annular fill materials were placed via the 2.75-inch-OD tremie line. <br /> The A Groove well casing was constructed with a string of 2 3/8-inch-OD, <br /> NSG-6, fiberglass casing in nominal 20-ft lengths from surface to 775 ft. <br /> The annular interval above the A Groove well and below the lower Uinta <br /> Formation installation, form 548 to 697 ft, was sealed with 125 sacks of <br /> bentonite hole plug. The hole plug was placed via tremie pipe in one <br /> continuous vertical lift. <br />Uinta <br /> A lower Uinta Formation well (29~U) was installed as the third completion <br /> in this borehole. A 10-ft, 2.0-inch-OD, Schedule 80 PVC, #10 slot screen <br /> was installed at 530 to 540 ft in a high porosity zone. <br />• The silica sand filter pack was placed from 520 to 548 ft. All annular fill <br /> materials were placed via the 2.75-inch-OD tremie line. <br />• The Uinta Formation well casing was constructed with a string of 2.0-inch- <br /> OD, 0.96 Ib/ft, Schedule 80, flush joint PVC casing in nominal 20-ft lengths <br />• from surface to 530 ft. <br />• The annular interval above the lower Uinta Formation well, from 512 to <br /> 520 ft, was sealed with 10 sacks of 3/8-inch bentonite chips. <br />• The interval from 34 to 512 ft was sealed with 243 sacks of Aquagard <br /> grout. The grout plug was placed via tremie pipe in one continuous <br /> vertical lift. <br />Phase Well Development <br />Developed well with airlift and bailer until parameters stabilized. <br />Total July Development Volume from Uinta = 2,040 gallons <br />Total July Development Volume from A -Groove = 1,515 gallons <br />Total July Development Volume from Dissolution Surface = 1,820 gallons <br />2n0 Development Phase <br />Although parameters stabilized during development of this well in July, the <br />well still did not appear to be developed; more volume was pumped in <br />August. <br />Total August Development Volume from A -Groove = 19,680 gallons <br />Sampling <br />• July 20, 1999 water quality samples collected from 29-4U, 29-4A, and 29- <br />4D using stainless steel bailer. <br />u <br />