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

WHC-MR-0203
10 WELL DEVELOPMENT
Both of the wells were developed by pumping. A 7j h.p. submersible pump
was placed in each of the wells and pumped until a consistent turbidity value
of less than 5 nephelometric turbidity units (NTU) was reached. All develop-
ment water was contained. A total of 698 gal were pumped out of well
299-E25-37 with a final turbidity of 1.1 NTU. After 1091 gal were pumped out
of well 299-E25-38, the final turbidity was 1.4 NTU. Well development logs
are shown in Appendix D.
Ground-water sampling occurred before development at well 299-E25-38.
This sampling consisted of the full suite of constituents (see Appendix D) to
assist in determining appropriate purge water handling and disposal methods.
in
Two sets of samples were collected during development at each well, one
01 after the wells were purged and one near the end of development. At well
299-E25-37, the first set collected consisted of the full suite of con-
w stituents to assist in determining appropriate purge water handling and
disposal methods. All other samples collected during development only
consisted of samples for metals and total organic halogen. The analyses
results of all samples collected before and during development are shown in
Appendix D. None of the analyses results was above the Interim Primary
Drinking Water Standards (40 CFR 265, Appendix III).
-° The HydroStar® pumps were set at both of the wells on October 12 and 13,
cl^
. 1989. The pump installation reports are shown in Appendix D.
® HydroStar tar is a registered tradename of Instrumentation Northwest,
Incorporated, Redmond, Washington.
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