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

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.N;<br />

WHC-MR-0203<br />

This was documented on a Nonconformance <strong>Report</strong> (Appendix C), but because this<br />

seal meets WAC 173-160 requirements, this was not considered to be a concern.<br />

WELL 299-E25-38<br />

The 304 stainless steel casing and screen was set on July 17, 1989. A<br />

total of 260 ft of 304 stainless steel casing and 21.05 ft of 10-slot channel<br />

pack screen was used. The screen was placed from 279.63 to 258.58 ft, and<br />

the casing was placed from 258.58 to 1.42 ft above land surface. The<br />

Colorado silica sand filter pack was then added, and the well was bailed to<br />

settle the filter pack material. The final placement of the 8-12 mesh silica<br />

sand filter pack was from 279.63 to 255.1 ft. The bentonite pellets were<br />

placed from 255.1 to 251.5 ft. The granular bentonite was placed from 251.5<br />

to 19.28 ft. The cement grout seal was placed from 19.28 to 2.0 ft. A<br />

concrete pad was then poured, and the 6-in. protective casing was installed.<br />

8 ^

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