PERMFILE69643

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: NH2 1996 Section 2.04.9 Soils Resource Information
• Media Type: D
• Archive: Yes

TABLE 2.04.9-2
. CRITERIA FOR EVALUATING SOIL SUITABILITY
PARAMETER -UNITS
PH
Conductivity (mmhos/cm)
Saturation percentage (%)
Sodium adsorption ratio3
Calcium carbonate percentage
Selenium (ppm)
Particle size°
Coarse fragments (~°)
<6.1->7.8
4,02
>80%
<25°k
>4
>15%
>2 ppm
All soil textures except:
s, Is, sc, sic, c
15°~ 5
' The threshold levels are to be used as a guide in evaluating the sutability of a soil material for
reclamation. An evaluation should take into account the "total system". Interactive parameters may
. either nullify or verify the significance of a potential problem.
2 The actual maximum acceptable salt level will depend on the plant species proposed in the
revegetation plan and the potential for upward salt movement.
s Specific level depends upon clay mineralogy, soil texture, and saturation percentage according to
Dol)hopf et al., 1983.
° The specific percentage of clay or sand allowed will depend upon clay mineralogy, organic matter
content, consistence, soil lift, spoil characteristics, and size of sand fraction.
5 These values may vary depending upon the plant species proposed for revegetation in speck
locations (e.g., a soil with a high coarse fragment content throughout its profile may be completely
salvaged 'rf used for rangeland versus cropland postmine land use).
These suitability evaluations, based on averages across the study area, were used for topsoil volume
(REVISED 9/99)
THRESHOLD SUITABILITY LEVEL'
2.04.9-9