1988-04-29_PERMIT FILE - C1981008A ‎(53)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 4/29/1988
• Doc Name: Soil Baseline Study Nucla East Study Area
• Section_Exhibit Name: Tab 9 Attachment 9-5
• Media Type: D
• Archive: Yes

Table 9-5-2
Criteria for Evaluating Soil Suitability
Parameter-Units Threshold Suitability Level1
pH Lift 12 <6.1- >7.8
Lift 2 <5.0, >8.4-8.9
Conductivity (mmhos/cm) Lift 1 >4.0
3 Lift 2 >4.0-12.0
Saturation percentage (%) >80%
<25%
Sodium adsorption ratio Lift 1 >4
Lift 2 >10-14
Calcium carbonate percentage Lift 1 >15
Lift 2 >30
Selenium (ppm) >2 ppm
Particle sizes All soil textures except:
Lift 1 s, 1s, sc, sic, c
Lift 2 s, >40-50%c
Coarse fragments (%) Lift 1 >15%6
Lift 2 >35%6
1 The threshold levels are to be used as a guide in evaluating the suitability 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 Specific single and double lift topsoil salvage procedures and suitability criteria will
be evaluated separately by soil type (prime or non-prime farmland) and land use (premine
rangeland, irrigated pastureland, and irrigated hayland or cropland).
3 The actual maximum acceptable salt level will depend on the plant species proposed in
the revegetation plan and the potential for upward salt movement.
4 Specific level depends upon clay mineralogy, soil texture, and saturation percentage
according to Dollhopf et al ., 1983.
5 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.
6 These values may vary depending upon the plant species proposed for revegetation in
specific locations (e.g., a soil with a high coarse fragment content throughout its
profile may be completely salvaged if used for rangeland versus cropland postmine land
use).
k/U U4-1
9-5-17 Revised 08/19/88