2013-07-30_HYDROLOGY - C1981008

• Permit No: C1981008
• IBM Index Class Name: Hydrology
• Doc Date: 7/30/2013
• Doc Name: June 2013 DMRS ‎(CO-0000213)‎
• From: Tri-State Generation & Transmission Association, Inc.
• To: DRMS
• Permit Index Doc Type: DMR’s
• Email Name: MLT
• Email Name: SB1
• Media Type: D
• Archive: No

A
Client: Western Fuels CO- 0000213 SCG Project No.: 31343 LB
Site: New Horizon Mine 007
WET TEST REPORT FORM — CHRONIC
Permittee: Western Fuels Colorado
Permit No.: CO- 0000213
Test Type: Routine ® Accelerated ❑
Test Species: Fathead minnow IWC: 100%
Test Start Test End
Outfall: 007
Time Test Start Date Time Test End Date
1445 06 -11 -2013 1400 06 -18 -2013
Test Results
Lethality
Growth
NOEC
100%
100%
100 %6
PASS
PASS
IC25
>100%
>100%
100
PASS
PASS
Dilution (s) - % Effluent
Measurements
Control
0%
20%
40%
60%
80%
100 %6
% Survival for day 1
100
100
100
100
100
100
% Survival for day 2
100
100
100
100
100
100
% Survival for day 3
100
100
100
100
100
100
% Survival for day 4
100
100
100
100
100
100
% Survival for day 5
100
100
100
100
100
100
% Survival for day 6
100
100
100
100
100
100
% Survival for day 7
100
100
100
100
100
100
Mean Dry Wt. m
0.361
0.368
0.358
0.373
0.424
0.386`
Hardness (mg/L) — Receiving Water: N/A Effluent: 215/207/232 Recon Water: 83
Alkalinity (mg/L) — Receiving Water: N/A Effluent: 188/84/82 Recon Water: 57
Chlorine (mg/L) — Effluent: <0.01 pH (initial /final) — Control: 8.2/7.8 100 %: 8.5/8.0
Total Ammonia as NH3 (mg/L) — Effluent: <0.03/ <0.03/ <0.03
Were all Test Conditions in Conformance with Division Guidelines?
If NO, list deviations from test specifications:
Laboratory: SeaCrest Group
®illin
Comments:
Analyst's Name: Emily Gustafson, David Tewkesbury, and Kimberly Anderson
SeaCrest Group 24