Drilling Services

1. The Department of Environmental Engineering and Earth Sciences is seeking a supplier to drilling three (3) shallow borings. 2. The geology of the area over the depth interval of the borings is expected to be characterized by shale with interbedded sandstone and limestone. The permanent water table is expected to be below the depth of the borings, but it is possible that perched groundwater is present at shallow depths. Air rotary drilling methods have been used to drill shallow borings in the vicinity of North Avant Field in the past. 3. Each boring will consist of drilling a 10-inch diameter boring to 40ft depth. Air rotary is the preferred drilling method. Then steel casing with a minimum 6-inch inner diameter will placed in the boring and sealed to the surface with neat cement or bentonite hole-plug. Then the offerer will drill a 6-inch diameter borehole below the bottom of the casing. The 6-inch diameter borehole will extend to a total depth of 140 ft. 4. The total length of air rotary drilling is 420 ft. The total length of casing is 120 ft. The total length of boring to be grouted is 120 ft. 5. The borings will be located at the North Avant Oil Field, 5 miles southeast of Barnsdale, OK and approximately 0.5 mile southwest of the small town of Wolco, Oklahoma. The UTM coordinates of one of the borings is: 761157.00 m E 4046752.00 m N and the others are within 500 yards

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Cast-in-Place Concrete.
Division 22 -	Plumbing, Plumbing Piping, Plumbing Equipment.
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Division 31 -	Earthwork, Grading, Earthwork Methods.
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Division 44 -	Pollution and Waste Control Equipment, Water Pollution Control Equipment.