2018-04-02_PERMIT FILE - C1981019A ‎(7)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 4/2/2018
• Doc Name: Permits
• Section_Exhibit Name: Volume 15 Rule 2
• Media Type: D
• Archive: Yes

RULE 2 PERMITS
anomalous in nature. Horizons greater than 18 inches thick were collected from the lower portion of the
soil horizon. One to eight samples were collected from each sampled pedon, with more than four samples
collected from each site on average. A total of 426 samples were collected for laboratory analysis. Sample
locations are shown on Map 5D.
Soil physicochemical data from the 95 soil profiles are provided in Table 2.04.9-17 and Table 2.04.9-18.
Descriptions of the soil map units identified in the Collom permit expansion area are presented in the
Baseline Soil Survey (Exhibit 9, Item 8). The parameters analyzed include the following:
1. Texture (including the sample's coarse fragment content and percentage of sand, very fine sand, silt
and clay)
2. pH (acidity/alkalinity)
3. Electrical Conductivity
4. Sodium Adsorption Ratio (SAR)
5. Saturation Percentage
Additional parameters were analyzed in accordance with the following protocol and as presented on the
Laboratory Reports contained in the baseline soil survey (Exhibit 9, Item 8). All parameters were analyzed
using the methods specified by the Wyoming Department of Environmental Quality (WDEQ) Topsoil and
Overburden Guidelines (Guideline 1; WDEQ 2004). The parameters analyzed include the following:
1. Texture (including the sample's coarse fragment content and percentage of sand, very fine sand, silt
and clay)
2. pH (acidity/alkalinity)
3. Electrical Conductivity
4. Sodium Adsorption Ratio (SAR)
5. Saturation Percentage
Additional parameters were analyzed in accordance with the following protocol and as presented on the
Laboratory Reports contained in the baseline soil survey (Exhibit 9, Item 8).
Fertility(Organic Matter Content, Nitrogen, Phosphorus, and Potassium):
The following horizons from all sample sites were analyzed for soil fertility:
1. All A horizons;
2. All B and C horizons beginning within 24 inches of the ground surface; and,
3. Those B and C horizons with less than 35 percent clay and less than 35 percent coarse fragments.
Boron and Selenium:
Boron and selenium were not known to be present in elevated concentrations in the Soils Survey Area.
However, to provide information for screening, the thickest horizon beginning within the top 24 inches of the
soil profile was analyzed for these parameters.
The soil laboratory and field data were compared with the preliminary topsoil and substitute topsoil
suitability criteria shown on Table 2.04.9-19 to determine the suitability of each horizon and map unit.
These suitability criteria were developed based on a review of Wyoming Department of Environmental
Quality (2004) and Montana Department of Environmental Quality (1998) topsoil and overburden
suitability guidelines in conjunction with operational and sound reclamation practices for mined land
reclamation. Based on these comparisons, soil horizons that exceeded the criteria provided on the table
were identified and were considered unsuitable as a plant growth medium for reclamation. The salvage
depth for each series was from the surface to the top of the first unsuitable horizon.
Collom — Rule 2, Page 36 Revision Date: 12/30/16
Revision No.: TR -108