2008-03-31_PERMIT FILE - C1980007A ‎(34)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 3/31/2008
• Doc Name: 2.04-51 Thru 2.04-113
• Section_Exhibit Name: 2.04.7 Hydrology Description
• Media Type: D
• Archive: Yes

West Elk Mine
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Table 11
Baseline Chemical Analyses
Springs/Surface Water
pH lab and field Sodium (Na)
Conductivity at 25 C lab and field Sulfate SOa-
Temperature field Aluminum A)
Total Dissolved Solids' Arsenic (As) (Total Recoverable)
Total Suspended Solids Cadmium Cd
Sodium Adsorption Ratio SAR Copper(Cu)
Bicarbonate HCOs Iron e) 1 (Total and Dissolved
Calcium Cam Lead Pb
Chloride CI Manganese Mn (Total and Dissolved
Hardness Mercury H (Total Recoverable
Ma nesium M Mol bdenum Mo
Nitrate -Nitrite Selenium Se Total Recoverable
Phosphate POa as P Zinc Zn
Potassium Boron B

Groundwater
H lab and field Nitrate-Nitrite
Conductivity at 250C lab and field Phosphate (P04 as P)
Tempe ature field Potassium
Total Dissolved Solids Turbidit
Sodium Adsorption Ratio SAR Sodium Na
Bicarbonate HCOa Sulfate SOa
Calcium Ca+ Arsenic As
Carbonate COa Cadmium Cd
Chloride CI Iron Fe' (Total and Dissolved
Hardness Manganese Mn (Total and dissolved
Magnesium M ' Lead Pb
Ammonia NH3 Mercury (H
Selenium Se Zinc Zn
Boron B
Notes:
1. Parameters monitored as a result of TR-54
2. Added to baseline analyses in 1996. Not for analyses completed prior to 1996.
3. All parameters will be analyzed for their dissolved form unless stated otherwise.
As with stream monitoring, portions of the spring monitoring program have been temporarily
suspended until the sums-ner before mining impacts can be expected, at which time monitoring of
the springs will be resumed. In accordance with CDRMS regulations, baseline flows have been
established for all springs at which monitoring has ceased. Since the springs already have adequate
baseline flow records, initiating the monitoring of springs more than a year prior to mining in the
area will have two benefits. First, the data can be used to initially determine whether the
established baseline has changed significantly. Second, the new data will serve to build on the
existing database of pre-mining spring flows.
In the Mimnesota Creek drainage basin, monitoring was discontinued for springs J-4, J-7, J-10 and
WCC-23 until the summner before mining impacts can be expected. Sampling of spring J-4 ;vas
reinitiated in 1996. In 2006, MCC added 5 new spring monitoring sites in the SOD (Deer Creek
Spring and Pipeline, WCC-24, J-2, J-7, and 35-3). In 2007, MCC added 3 additional springs in
w. the Deep Creek drainage (at the request of CDRMS). The locations of the new monitored springs
2.04-89 Revised Aloveinber 2001 PRIO, Harch 2006; Rev. Apri1 2006 PRIO; Rev. Mai; 2006 PRIO; Sep. 2007 PRI2; Feb. 2008 PR12