2016-10-26_HYDROLOGY - C1981008

• Permit No: C1981008
• IBM Index Class Name: Hydrology
• Doc Date: 10/26/2016
• Doc Name: Discharge Monitoring Report ‎(DMR)‎
• From: Tri-State Generation and Transmission
• To: DRMS
• Annual Report Year: 2016
• Report Quarter_Month: Sep
• Permit Index Doc Type: DMR’s
• Email Name: BFB
• Email Name: DIH
• Media Type: D
• Archive: No

Client: Elk Ridge Mining and Reclamation CO -0000213 SCG Project No.: 316641.B
Site: New Horizon Mine 013
Test Results
WET TEST REPORT FORM — CHRONIC
Permittee:
Elk Ridge Mining and Reclamation
Outfall: 013
Permit No.:
CO -0000213
PASS
Test Type:
Routine N Accelerated ❑
40%
Test Species:
Ceriodaphnia dubia
IWC: 100%
Test Start
Test End
Time
Test Start Date
Time Test End Date
1515
09-13-2016
1515 09-20-2016
Test Results
Le>thai
Re ' r©duetiori
NOEC
100%
100%
PASS
PASS
20%
40%
60%
IC25
>100%
>100%
PASS
PASS
Dilution(s) - % Effluent
Hardness (mg/L) — Receiving Water: N/A Effluent: 858/1229/1329 Recon Water: 86
Alkalinity (mg/L) — Receiving Water: N/A Effluent: 245/293/307 Recon Water: 62
Chlorine (mg/L) — Effluent: <0.01 pH (initial/final) — Control: 8.1/8.0 100%: 7.0/8.0
Total Ammonia as NH3 (mg/L) - Effluent: 1.54/1.97/1.67
Were all Test Conditions in Conformance with Division Guidelines? YES N NO ❑
If NO, list deviations from test specifications:
Laboratory: SeaCrest Group
Comments:
Analyst's Name: Madison Reese, Natalie Jones and Emily Hawkins
Date o I / 3 n
P 18
Control
Measurements
0%
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
100
100
100
100
100
% Survival for day 4
100
100
100
100
100
100
% Survival for day 5
90
100
100
100
100
100
% Survival for day 6
90
100
100
100
100
100
% Survival for day 7
90
100
100
100
100
100
Mean 3 Braod Total
20.9
X7;8
16.4
16.4
16.9
Hardness (mg/L) — Receiving Water: N/A Effluent: 858/1229/1329 Recon Water: 86
Alkalinity (mg/L) — Receiving Water: N/A Effluent: 245/293/307 Recon Water: 62
Chlorine (mg/L) — Effluent: <0.01 pH (initial/final) — Control: 8.1/8.0 100%: 7.0/8.0
Total Ammonia as NH3 (mg/L) - Effluent: 1.54/1.97/1.67
Were all Test Conditions in Conformance with Division Guidelines? YES N NO ❑
If NO, list deviations from test specifications:
Laboratory: SeaCrest Group
Comments:
Analyst's Name: Madison Reese, Natalie Jones and Emily Hawkins
Date o I / 3 n
P 18