PERMFILE112522

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: TAB 6 GEOLOGY AND OVERBURDEN ASSESSMENT
• Media Type: D
• Archive: Yes

TABLE 6.3
IContinuedl
Footnotes:
' These suitability levels are to be used as a guide in evaluating the degree o} suitability for an
overburden, underburden, or regrad~:d spoil material for reclamation. The evaluation should t.3ke into
account the 'total system". Interactive parameters may either nullify or verify the significer~ce of a
potential problem.
' This value is supported by MDSL (1 E~941 and USDI-OSMRE 119851.
~ This value is supported by USDA 119791. MDSL 119941, and USDI-BLM (19971.
' The low limit of this range is supported by WDEO 119851. USDA (1979) and USDA 119831 recommend
a lower tolerance limit of 4.5 whereas USDI-BLM (19771 suggests 3.5.
° The upper tolerance limit of this range is recommended by USDA (19791 and WDEO (19851 whereas
USDI-OSMRE 119851 proposes 8.8.
° The actual minimum or maximum acceptable salinity level will depend on the plant species proposed in
the revegetetion plan, the potential for upward salt movement, and the particle size.
' The lower limit of 8 is recommended bV Barran et al. (19801. WDEO (19851. USDA (19831. USDI-
OSMRE 119851, Schafer 17979, 79801, and USDI-BLM 119771 Both MDSL (19941 and USDA 119791
indicate lower limits of 4 and 6 may be essential for certain plant species. The upper limit cf 12 is
proposed by WDEO (79851 and UDSI-OSMRE (19851, whereas USDA (1983) and USDI-BLM 11977)
recommend 16, USDA (1979) proposes 9, while MDSL 11994) and Schafer 11979, 1980) specify 8.
° These values are recommended by USDI-OSMRE (19851, MDSL (19941, and WDEO (1985) with the
exception that WDEO 11985) proposes en upper limit of 80 and MDSL 11994) 90.
•
° Specific level depends upon clay mineralogy, soil texture, and saturation percentage acconiing to
Dollhopt et al. (19851. •
10 These values are similar to those recommended by Barrett et al. (19801, MDSL (19941, WDEO (19851,
USDA (19831, USDI-OSMRE 119851, Schafer {1979, 19801, end USDI-BLM (19771.
Proposed by USDI-OSMRE 119851.
't The specific percentage of clay or send will depend upon clay mineralogy, size of sand fraction, and
saturation percentage. Abbreviations include: s -sand, M-Cos -medium to course sand, Is -loamy
sand, sl -sandy loam, si -silt, sil -silt loam, sicl -silty clay loam, sic -silty clay, scl -sandy clay
loam, cl -clay loam, sc -sandy clay, c -clay.
'~ Vary similar to recommendations by Schafer (1979, 19801, USDI-OSMRE 119851, USDA (1983), WDEO
(19851. USDA 119791.
Similar to USDI-OSMRE (19851, USDA (1979) proposes greater than 60°h clay.
'S Recommended by MDSL 119941. WDEO 119851, and USDI-OSMRE 119851. Schafer 11979, 79801
proposes 8. The lower limit recommended by Barth et al. (19811.
1B The actual maximum acceptable molybdenum concentration will depend upon the plant species
proposed in the revegation plan seed mix and their potential for molybdenum accumulation. Tha depth
of replaced topsoil must also be evaluated.
'r Recommended by MDSL 119941. Barth et al. 179811 and Sutton et el. 119811 recommend 2.0.
l~
u
24 Revised 9/98