HYDRO20352

• Permit No: C1982056
• IBM Index Class Name: Hydrology
• Doc Date: 1/31/2000
• Doc Name: 4TH QUARTER 1999 DMR SUBMITTAL
• From: TWENTYMILE COAL CO
• To: WQCD
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

HARDNESS PARAMETERS BEING TESTED FOR IN-HOUSE CLARIFICATION
Outfall Hardness m /L
10/4/99 11/1/99 12/6/99
001 2395 2464 3133
All testing is being conduced through CT&E Laboratories in Denver, Colorado.
The Hardness value is a calculated result based on dissolved Calcium and Magnesium.