HYDRO22729

• Permit No: C1982056
• IBM Index Class Name: Hydrology
• Doc Date: 8/7/2003
• Doc Name: 2nd Quarter 2003 DMRs ‎(CO-0036684)‎
• From: Twentymile Coal Company
• To: WQCD
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

i
ADDRESS ALL CORRESPONDENCE TO:
COMMERCIAL TESTING 6 ENGINEERING CO.
4666 PARIS STREET, SUITE 8-200
COLORADO - CDPS WET TEST REPORT FORM -ACUTE DTEL 303) 30734772
I FAX: [phone]
PERMITTEE: Twentymile Coal Company CDPS NO.: CO-0036684 OUTFACE: 62-FCT
I TYPE TEST: ROUTINE: _ ACCELERATED: XX SPECIES: C. dubia
TEST RESULTS: LCD: 44.4% STATISTICAL METHOD: .Spearman-Karber
TEST TIME & DATE: BEGIN: 0910 AM 06/10/03 END: 0920 AM 06/12/03
I DILUTIONS (% EFFLUENT)
MEASUREMENTS 0% 12.5% 25% 50% 75% 100%
# START OF TEST: 20 20 20 20 20 20
# ALIVE AFTER 24 HRS: 20 20 20 20 15 18
# ALIVE AFTER 48 HRS: 20 20 20 7 2 0
# ALIVE AFTER 72 HRS:
# ALIVE AFTER 96 HRS:
RECEIVING WATER USED FOR DILUTION? NO TOTAL RESIDUAL CI - (mg/l): <0.1
'
HARDNESS (mg/I): RECEIVING WATER: EFFLUENT: 2560 RECON WATER: 110
' ALKALINITY (mg/I): RECEIVING WATER: EFFLUENT: 425 RECON WATER: 95
pH: INITIAL: CONTROL 8.5 100% EFFLUENT 7.8
FINAL: CONTROL 8.4 100% EFFLUENT 8.0
TOTAL AMMONIA AS N (mg/I): INITIAL 100%: <1.0 FINAL 100%: <1.0
' WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? YES
' IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS:
LABORATORY: SGS COMMERCIAL TESTING & ENGINEERING ANALYST: ~"
' COMMENTS: Accelerated test #2. This test failed. LCD =44.4%.
' _ 04/08/03

~ Commercial Testing & Engineering Co. Minerals Services -Corporate Office
1919 S. Highland Ave., Suite 2108. Lombard, IL 60148 t [phone] 11030) 953-9306 www.ags.c°m
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