GENERAL32470

• Permit No: C1982055
• IBM Index Class Name: General Documents
• Doc Date: 9/15/1994
• Doc Name: TOPSOIL SUBSTITUTE SUITABILITY REPORT RATON CREEK MINES
• Permit Index Doc Type: SOILS
• Media Type: D
• Archive: No

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Table I-2: Criteria to establish suitability of topsoil and subsoil (or soil
substitutes).
Parameter
Suitable
5.5-8.5
0-8
25-80
0-10
Marginal 1/
5.0-5.5
8.5-9.0
8-12
Unsuitable
PH
EC (Conductivity
mmhos/em
Saturation Percentage
Tezture
SAR 2/
Selenium 4/
Boron
Coarse Frag
(5 vol)
ORGANIC C 5/
< 0.1 ppm
5.0 ppm
< 255
< 5.0
~ 9.0
> 12
< 25
> 80
C~ SSC~ 9
10-12 ~/
10-75
> 0.1 ppm
25-35
>12 3/
~ 75
> 5.0 ppm
> 355
0.55
1/ Evaluated on an individual basis for suitability.
2/ As an alternative to SAR calculations ESP (exchangeable sodium
percentage can be determined. ESP should be determined if suitable SAR
value is exceeded.
~/ For fine texture soils (clay 405)
4/ SELENIUM SUITABILITY CRITERIA NEEDS TO BE REEVALUATED FOR SOILS. THIS
REEVALUATION SHOULD TAKE INTO ACCOUNT THE CARTER MINING COMPANY STUDY
AND ANY FIELD CORRELATIONS FOR.SOILS AND VEGETATION THAT ARE AVAILABLE
FOR MINING LANDS IN NYOMING.
5/ ORGANIC CARBON SHOULD PROBABLY BE INCLUDED IN THE SUITABILITY CRITERIA
FOR SOIL SINCE COAL OPERATORS HILL LIKELY BE COMING IN FOR SOIL SALVAGE
DEPTH REDUCTIONS. THESE REDUCTIONS HILL BE BASED ON RELATIVE
PRODUCTIVITY OF A AND B HORIZONS VERSUS C HORIZONS. THE 0.55 VALUE WAS
OBTAINED FROM il00DS~ L.E. C.E. SCHUMAN. 1986. INFLUENCE OF SOIL ORGANIC
MATTER CONCENTRATIONS ON CARBON AND NITROGEN ACTIVITY. SOIL SCI. SOC.
AM. J. 501:1241-7245.
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