Grout Treatment Facility Borehole Summary Report ... - Hanford Site

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WELL 299-E25-37
WHC-MR-0203
Drilling began June 14, 1989, and continued until July 13, 1989, when
total depth was reached (280 ft). A total of 153 ft 8 in. of 10-in. and
283 ft 9 in. of 8-in. temporary carbon steel casing was used. The sediments
encountered were sand with varying amounts of mud (silt and clay) and gravel
from 0 to 185 ft, from 190 to 195 ft, and from 270 to 275 ft; and sandy
gravel to muddy sandy gravel from 185 to 190 ft, 195 to 270 ft, and 275 to
280 ft. The well was drilled using a drive barrel from 0 to 198 ft and a
hard-tool bit from 198 to 280 ft. The well was logged with the natural gamma
geophysical probe on June 28, 1989 (inside the 10-in. casing), and July 14,
1989 (inside the 8-in. casing). No perched water was encountered during
drilling. The static water level measured on July 13, 1989, was 264.7 ft
below ground surface. A total of approximately 520 gal of water was added
during drilling, 330 gal of which were added below the water table.
WELL 299-E25-38
° Drilling began June 7, 1989, and continued until July 6, 1989, when
total depth was reached (283 ft). A total of 20 ft of 12-in., 154 ft 8 in.
of 10-in., and 286 ft of 8-in. temporary carbon steel casing was used. The
sediments encountered were predominantly sand with varying amounts of mud
(silt and clay) and gravel from 0 to 175 ft, and 257 to 283 ft; and sandy
gravel to muddy sandy gravel from 175 to 257 ft. The well was drilled using
° a drive barrel from 0 to 202 ft and the hard tool bit from 202 to 283 ft.
-- The well was logged with the natural gamma geophysical probe on July 5, 1989
(inside the 8-in. casing). No perched water was encountered during drilling.
The static water level measured on July 5, 1989, was 265.1 ft. A total of
approximately 400 gal of water was added during drilling, 260 gal of which
were added below the water table.
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