2016-01-04_REPORT - C1981008

• Permit No: C1981008
• IBM Index Class Name: Report
• Doc Date: 1/4/2016
• From: Tri-State Generation & Transmission Assoc.
• To: DRMS
• Annual Report Year: 2015
• Permit Index Doc Type: Hydrology Report
• Email Name: BFB
• Email Name: DIH
• Media Type: D
• Archive: No

Client: Western Fuels CO -0000213 SCG Project No.: 315508.6
Site: New Horizon Mine 007
WET TEST REPORT FORM — ACCELERATED CHRONIC
Permittee: Western Fuels
Permit No.: CO -0000213
Test Type: Routine ❑ Accelerated 0
Test Species: Fathead minnow IWC: 100%
Outfall: 007
Test Start Test End
Time Test Start Date Time Test End Date
1500 07-28-2015 1430 08-04-2015
Test Results
I,ethaH Growth
NOEC
100% 100%
60%
PASS PASS
ICzs
> 100'/0 > 1000/0
100
PASS PASS
Dilution(&) - % Effluent
Measurements(00A)
Control
20%
40%
60%
80%
100%
% 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
1 100
100
100
100
100
% Survival for day 4
100
100
100
100
100
100
% Survival for day 5
100
100
100
100
1 100
100
% Survival for day 6
100
100
98
100
100
]Do
% Survival for day 7
1001
100
95
100
100
100
Mean 3 Brood Total
0.265
1 0.234
1 0.223
0.242
0.272
0.257
Hardness (mg/L) — Receiving Water: N/A Effluent: 200/223/197
Alkalinity (mg/L) — Receiving Water: N/A Effluent: 119/159/153
Chlorine (mg/L) — Effluent: <0.01 pH (initial/final) — Control: 8.1/7.4
Total Ammonia as NH3 (mg/L) - Effluent: <0.03/<0.03/0.09
Recon Water: 89
Recon Water: 57
100%:7.4n.6
Were all Test Conditions in Conformance with Division Guidelines? YES ® NO ❑
If NO• list deviations from test specifications:
Laboratory: SeaCrest Group
Comments:
Analyst's Name: Alex Arnold, Alex Roman-Wensing, Emily Gustafson, and Kyra Brisson
SesCrest Group 17