1988-04-11_PERMIT FILE - C1981008A ‎(5)‎

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/11/1988
• Doc Name: Nucla East Geology and Overburden Assessment
• Section_Exhibit Name: Tab 6 Attachment 6-1
• Media Type: D
• Archive: Yes

Parameter Selection - Phase II
Overburden parameters for the second phase sampling were selected after reviewing the
Phase I data. Constituents which approached or exceeded marginally suitable to unsuitable
guideline levels during Phase I sampling were included on the Phase II analyses list.
Those constituents which were below detection limits were naturally omitted from the Phase
11 analyses list.
Phase I overburden sampling and analyses results for the Nucla East study area were
presented to the Division on June 22, 1987 (meeting, G. Wendt and S. Renner). A letter of
agreement for the Phase II monitoring plan was subsequently submitted to the Division on
July 6, 1987 (letter, G. Wendt to P. O'Connor) and approved by the Division on August 4,
1987 (letter P. O'Connor to J. Lunan).
Laboratory parameters included paste pH, ammonium nitrogen, sodium adsorption ratio, and
acid base potential . Phase II SAR analyses were confined to Sites 881E and 882E since
elevated SAR values were identified only at Site 872E during Phase I drilling.
Analytical Procedures - Phase I and Phase II
At the lab ( InterMountain Lab, Farmington, New Mexico), chip samples and cores were air
dried, split, and composited according to lithologic and stratigraphic sequence, crushed
to pass a 10 mesh sieve, and bagged for storage. Prior to splitting and crushing intact
cores, foreign material attached to the outside of the core was removed. Overburden chip
samples from Phase I Site 871E were collected from 2-foot vertical increments. Adjacent
2-foot chip samples of similar strata were composited into 4- and 6-foot vertical
increments prior to laboratory analysis. Phase II overburden chip samples were composited
by similar strata while geologic descriptions were prepared during field sampling.
All samples from the three Phase I cores and three Phase II combination core/bore holes
were chemically and physically analyzed at InterMountain Laboratory using the procedures
listed in Table 6-1-2. The parameter and procedure list was developed by Peabody's soil
scientist (Gary Wendt) in consultation with the Division's reclamation specialists (Peter
O'Connor and Steve Renner). Extensive reference was made to the Division's 1982 Water
Quality and Overburden Geochemistry Guideline.
6-1-22 Revised 04/11/88