2010-11-03_HYDROLOGY - C1982056 (4)

Home Browse Search

Aqua-Tox, Inc. 4880 Robb Street, Suite 8 w? Wheat Ridge, CO 80033 (303) 621-4880 aqua-tox.com r ACUTE TOXICITY REPORT Pimephales promelas - Fathead Minnow CLIENT NAME: 20-Mile Coal Company SAMPLE I.D.: 093010-1 50 % MORTALITY TEST: Pass TEST RESULT LC50: >>100% % SURVIVAL IN 100% DILUTION: 100% SAMPLE DATE: 09-29-10 TIME: 13:30P CLIENT ID: Site 62 ORGANISM: Fathead Minnow AGE: DOH 09-25-10 TEST START: 09-30-10 13:20P TEST FINISH: 10-04-10 13:20P TYPE OF TEST: LC50 96 hours static renewal, moderately hard fresh synthetic dilution water. MODERATELY HARD FRESH SYNTHETIC DILUTION WATER CONSTITUENT AMMONIA: ND D.O.: 6.94 mg/L HARDNESS: 97.22 mg/L CHLORINE: ND _ ALKALINITY: 58.47 mg/L TEMPERATURE: 19.6 deg C - pH: - - 803 --- SURVIVAL DATA DILUTIONS (%) DATE (HOURS)CONTROL 6.25 12.5 25 50 75 100 9/3012010 INITIAL 10/1/2010 24 10/2/2010 48 10/3/2010 72 10/4/2010 96 MORTALITY: % SURVIVAL: 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 0 0 0 0 0 0 0 100% 100% 100% 100% 100% 100% 100% DAILY CHEMISTRY - (MIN/MAX) DILUTIONS (%) CONTROL 6.25 12.5 25 50 75 100 CONDUCTIVITY (micros) 311/323 505/529 947/966 1458/1474 2020/2060 2790/2820 347013510 D.O. (mg/L) 6.7/7.1 6.7/7.3 6.7/7.3 6.8/7.3 6.8/7.4 6.917.4 6.9/7.5 pH 7.6/8.1 7.6/82 7.6/8.2 7.6/8.3 7.6/8.4 7.718.5 7.7/8.6 TEMPERATURE (deg C) 19.6/20.3 19.6/20.3 19.6/20.3 19.6/20.3 19.6/20.3 19.6/20.3 19.6/20.3 GENERAL CHEMISTRY - SAMPLE AMMONIA: 0.22 mg/L D.O.: 7.48 mg/L HARDNESS: 2,006.01 mg/ L CHLORINE: ND ALKALINITY: 611.70 mg/L TEMPERATURE: 19.6 deg C pH: 7.74 D.O AFTER AERATION: NA ANOEC CAL'CULATION' METHOD METHOD REFERENCE 100% SPEARMAN-KARBER EPA -821-R-02-012 October 2002 pg.78 ADDITIONAL COMMENTS: Analysis Conducted by' ?/; ?-` •?? Reviewed by: .f Date: 10 _ 11,E Dater i