2017-02-03_PERMIT FILE - C1980004 ‎(21)‎

• Permit No: C1980004
• IBM Index Class Name: Permit File
• Doc Date: 2/3/2017
• Section_Exhibit Name: Appendix N Probable Hydrologic Consequences
• Media Type: D
• Archive: No

In addition to concerns about the surface waters of East Salt Creek, the DOW
stated their concern about the potential mobilization of selenium from the mancos shale in a
letter dated January 25, 2008 to the DRMS. The Operator had soil samples taken in the
footprint of the proposed coal mine waste pile and determined selenium levels in the soils
are below detectable levels. Therefore, leaching of water from the sediment pond and or
coal mine waste pile will not increase the selenium load in the surface waters of East Salt
Creek. The results from the soils testing are located in the Soils report under Appendix T.
Appendix N — PR -02 -14- 10/10