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20 <br />20 <br />20 <br />20 <br />20 <br />- <br />20 <br />-- <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />19 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />18 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />2 <br />100Y6 <br />100Y6 <br />10096 <br />100% <br />1009& <br />100% <br />9096 <br />317/327 <br />583K604 <br />846/853 <br />1273/1298 <br />2170/2270 <br />2890/3010 <br />__ <br />35700740 <br />7 3/7.6 <br />7.3/7.6 <br />7 3/7 7 <br />7.3/79 <br />7.3/8.1 <br />7.302 <br />7.3/8.3 <br />808 1 <br />8.1/8.3 <br />O.1/84 <br />8.1/D8 <br />8.0/8.3 <br />80O.1 <br />700.O <br />20.1/20.4 <br />20 1/20.4 <br />20.1/20 4 <br />20.1/20 4 <br />20.1/20.4 <br />20.1/20.4 <br />20.1/20.4 <br />K <br />U <br />v <br />=== <br />Aqua-Tox, Inc. <br />4880 Robb Street, Suite 8 <br />Wheat Ridge, CO 80033 <br />(303) 621-4880 www aqua-tax corn <br />ACUTE TOXICITY REPORT <br />Ceriodaphnia dubia <br />CLIENT NAME Twentymile Coal Company <br />50 % MORTALITY TEST Pass <br />% SURVIVAL IN 1OO96DILUTION 9096 <br />SAMPLEi[l: 032812'1 <br />TEST RESULT LC50: >100% <br />SAMPLE DATE: 03-27-12 TIME: 14 CLIENT ID 2000'62 <br />ORGANISM Coriodephnixdubia AGE <24 hours old <br />TEST START 03-28-12 11 30 TEST FINISH: 03-30-12 11:30 <br />TYPE OF TEST: LC50, 48 hours, static, renewal, moderately hard fresh synthetic dilution water <br />MODERATELY HARD FRESH SYNTHETIC DILUTION WATER CONSTITUENT <br />AMMONIA: ND DD' 7 58 mg/L <br />HARDNESS 83D1mg/L CHLORINE ND <br />ALKALINITY' 56 56 mg/L TEMPERATURE: 20 2 deg C <br />pH: 8.00 <br />SURVIVAL DATA <br />DATE (HOURS) <br />3/28/2012 INITIAL <br />3/29/2012 24 <br />3/30/2012 48 <br />MORTALITY. <br />% SURVIVAL <br />CONTROL <br />DILUTIONS (°/0) <br />6.25 12.5 25 <br />ion <br />DAILY CHEMISTRY (MIN/MAX) <br />CONDUCTIVITY (microS) <br />D (mg/L) <br />pH <br />TEMPERATURE (deg C) <br />DILUTIONS (°/0) <br />inn <br />GENERAL CHEMISTRY - SAMPLE <br />AMMONIA: 0.02 mg/L <br />HARDNESS 2383 97 mg/L <br />ALKALINITY 4848Omg/L <br />pH 791 <br />DO 8.33 mg/L <br />CHLORINE. ND <br />TEMPERATURE 202 deg C <br />D 0 AFTER AERATION. NA <br />ANOEC <br />75% <br />CALCULATION METHOD <br />SPEARMAN-KARBER <br />METHOD REFERENCE <br />EPA -821-R-02- 12 October 2002 pg 78 <br />