PERMFILE51657

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: NH1 TAB 6 GEOLOGIC INFORMATION
• 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 Nuinber2
Units 873E 874E 875E 876E Mean SD3
pH 4.0 4.0 4.0 - - 4.0 O.U
EC4, mmhos/cm 3.9 9.3 5.9 - - 6.0 2.2
SPS, 90 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.U5
ABPB -22.9 -7.6 -5.3 - - -11.9 9.6
Fe, ppin 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 --
lUnit 2 consists of the oxidized and weathered upper Dakota Coal seam and
2the adjacent very dark gray to black carbonaceous shale.
For drill hole location, see Exhibit 6-3A, Overburden Sample Locations.
45D-Standard Geviation.
SEC-Electrical Conductivity.
6SP-Saturation Percentage.
7SAR-Sodium Adsorption Ratio.
NP-Neutralization Potential; Units are tons of CaC03 required per acre
• furrow slice.
BABP-Acid Base Potential; Units are tons of CaCO required per acre furrow
slice; ABP was calculated from Pyrite and Organ~c 5.
6-46 Revised 11/01/86