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Aqua-Tox, Inc. <br /> 4880 Robb Street, Suite 8 <br />r <br />-la-57, If Wheat Ridge, CO 80033 <br /> (303) 621-4880 aqua-tox.com <br /> <br /> <br />- ACUTE TOXICITY REPORT <br /> Cerioda hnia dubia <br />CLIENT NAME: 20-Mile Coal Company SAMPLE I.D.: 030510-1 <br />50 % MORTALITY TEST: Pass TEST RESULT LC50: >100% <br />% SURVIVAL IN 100% DILUTION: 100% <br />SAMPLE DATE: 03-03-10 TIME: 10:37A CLIENT ID: Site 84 <br />ORGANISM: Ceriodaphnia dubia AGE: < 24 hours old <br />TEST START: 03-05-10 13:OOP TEST FINISH: 03-07-10 13:OOP <br />TYPE OF TEST: LC50, 48 hours, static, renewal, moderately hard fresh synthetic dilution water. <br /> <br />MODERATELY HARD FRESH SYNTHETIC DILUTION WATER CONSTITUENT <br />AMMONIA: ND D.O.: 7.00 mg/L <br />HARDNESS: 94.00InglL CHLORINE: ND <br />ALKALINITY: 55.35 mg/L TEMPERATURE: 20.0 deg C <br />pH: 7.97 <br />SURVIVAL DATA DILUTIONS (%) <br />DATE (HOURS)CONTROL 6.25 12.5 25 50 75 100 <br />3/5/2010 INITIAL 20 20 20 20 20 20 20 <br />3/6/2010 24 20 20 20 20 20 20 20 <br />3/7/2010 48 20 20 20 20 20 20 20 <br />MORTALITY: 0 0 0 0 0 0 0 <br />% SURVIVAL: 100% 100% 100% 100% 100% 100% 100% <br />DAILY CHEMISTRY - (MIN/MAX) DILUTIONS (%) <br />0 6.25 12.5 25 50 75 100 <br />CONDUCTIVITY (micros) 318/325 698/704 1072/1080 176011770 3440/3480 4820/4860 6150/6170 <br />D.O. (mg/L) 7.0/7.4 7.0/7.4 7.1/7.4 7.1/7.3 7.2/7.3 7.2/7.4 7.2/7.5 <br />pH 8.0/8.1 8.0/8.3 7.9/8.5 7.9/8.7 7.9/8.6 7.8/8.5 7.8/8.5 <br />TEMPERATURE (deg C) 19.2/20.0 19.2/20.0 19.2/20.0 19.2/20.0 19.2/20.0 19.2/20.0 19.2/20.0 <br />I - I <br />GENERAL CHEMISTRY - SAMPLE <br />AMMONIA: 2.56 mg/L D.O.: 7.50 mg/L <br />HARDNESS: 520.80 mg/L CHLORINE: ND <br />ALKALINITY: 909.50 mg/L TEMPERATURE: 20.0 deg C <br />pH: 7.80 D.O AFTER AERATION: NA <br />ANOEC CALCULATION METHOD METHOD REFERENCE <br />100% SPEARMAN-KARBER EPA -821-R-02-012 October 2002 pg.78 <br />ADDITIONAL COMM TS: <br />Analysis <br />Conducted by: Reviewed by: <br />Dat I?r i? Date: