2014-10-10_PERMIT FILE - C1996083A ‎(22)‎

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 10/10/2014
• Doc Name: Information on Environmental Resources
• Section_Exhibit Name: Volume I 2.04 Information on Environmental Resources
• Media Type: D
• Archive: Yes

2.04.6
(3)(a)(iii)(E)
Acid -Base Potential for D -Seam Oxbow Table 2.04.6 -71
Location of
Samples
Sulfur Form Used for
Calculating
Acid -Base Potential
Acid -Base Potential
(t. CaCO3 eq. /1000 t.
material)
D -Seam
total
+16
D Seam Floor
total
+32
D Seam Roof
total
0
D -Seam
total
+25
Parting
total
+13
D -Floor
total
+11
According to "Applications of Environmental Chemistry. A Practical Guide for
Environmental Professionals ", the acid base potential is equal to the
equlivalents of Calcium Carbonates in excess of the amount needed to
neutralize the acid that could potentially be produced from oxidation of pyritic
sulfur. In general, if the ABP is positive, the leachate from the coal is likely to
be basic.
The clay content in the roof, interburden and floor is quite low ranging
between 7 and 12 percent. Therefore, engineering properties of clay and
clay shale in the stratum immediately above and below the coal seam to be
mined is not deemed necessary.
Total sulfur content of the coal seam mined at the Bowie No. 1 mine is
generally below 0.5% with the following sulfur forms present:
pyritic sulfur = 0.02%
sulfate = 0.00%
organic sulfur = 0.38%
as received basis. Low concentrations of the potentially reactive sulfides
(pyrite or the polymorph marcarsite) seemingly preclude any potential for
acidic mine drainage.
MR -160 2.04-26- 09/14