1988-04-11_PERMIT FILE - C1981008A ‎(4)‎

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/11/1988
• Doc Name: Geologic Information
• Section_Exhibit Name: Tab 6
• Media Type: D
• Archive: Yes

Table 6-11
Chemical and Physical Properties of Oxidized Upper Dakota Coal Seam and
Encompassing Very Dark Gray Shale (Unit 2) for
Phase II Samples Collected at Nulca Mine,
November, 1986
Parameter Phase II Hole Number
Units 873E 874E 875E 876E Mean SD
pH 4.0 4.0 4.0 -- 4.0 0.0
EC4, mmhos/cm 3.9 8.3 5.9 -- 6.0 2.2
SPS, % 88.0 62.7 65.9 -- 72.2 13.8
Ca, meq/1 15. 1 -- -- -- 15. 1 --
Mg,meq/1 12.8 -- -- -- 12.8 --
Na , meq/1 21.4 -- -- -- 21.4 --
SAR6 6.2 -- -- -- 6.2 --
Total S, % 0.36 0.41 0.55 -- 0.44 0.10
Sulfate S, % 0.04 0.09 0.41 -- 0. 18 0.20
Pyrite S, % 0.03 0.03 0.00 -- 0.02 0.02
Organic S, % 0.29 0.29 0. 14 -- 0.24 0.09
NP7 -12.9 2.4 -0.9 -- 3.8 8.05
ABP8 -22.9 -7.6 -5.3 -- -11.9 9.6
Fe, ppm 355.4 154.0 205.0 -- 238. 1 104.7
Mn, ppm 0.3 10.6 0.5 -- 3.8 5.9
Ni , ppm 1.2 -- -- -- 1.2 --
Zn, ppm 4.8 -- -- -- 4.8 --
Mo, ppm 0.2 -- -- -- 0.2 --
1 Unit 2 consists of the oxidized and weathered upper Dakota Coal seam and
2the adjacent very dark gray to black carbonaceous shale.
3For drill hole location, see Exhibit 6-3A, Overburden Sample Locations.
4SD-Standard Deviation.
EC-Electrical Conductivity.
6SP-Saturation Percentage.
7SAR-Sodium Adsorption Ratio.
NP-Neutralization Potential ; Units are tons of CaCO3 required per acre
8furrow slice.
ABP-Acid Base Potential ; Units are tons of CaCO required per acre furrow
slice; ABP was calculated from Pyrite and Organic S.
6-46 Revised 11/01/86