PERMFILE57029

• Permit No: C1992081
• IBM Index Class Name: Permit File
• Doc Date: 10/28/2005
• Doc Name: Dry Creek Alluvial Groundwater Evaluation
• Section_Exhibit Name: Tab 07 Appendix 7-2
• Media Type: D
• Archive: No

1994 memorandum included a calculation that demonstrated the coal leacha to
will have no impact on Dry Creek alluvial aquifer chemistry.
The discussion presented above provides sufficient evidence that background
alluvial chemistry upgradient of the Loadout facility is o£ "limited use and
quality." In addition, the upgradient and downgradient Dry Creek alluvial
groundwater chemistry is comparable in water type and dissolved loads and,
that Loadout operations have not impacted alluvial water quality downgradient
of the Loadout facility area. Finally, the coal stockpile leachate will have
no impact on existing water use potential of Dry Creek or the Dry Creek
alluvial system. To verify the conclusions presented in this Dry Creek
Alluvial Groundwater Evaluation, one additional monitoring well will be
installed upgradient o£ the Loadout at a location adjacent to Dry Creek below
the confluence of Stokes Gulch and Dry Creek.

TR-06 7-2.5 Aevis ed 06/05