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Aqua-Tox, Inc. <br />4880 Robb Street, Suite 8 <br />Wheat Ridge, CO 80033 <br />(303) 621-4880 www.aqua-to*.com <br />ACUTE WET TOXICITY REPORT <br />SAMPLE ID: Site 2000-84 TEST RESULT LC5,: >100% <br />CLIENT NAME: TwentMile Coal Company 50% MORTALITY TEST. PASS <br />ATI LOT M 033017-2 % SURVIVAL 100%: 65% <br />SAMPLE DATE: 3/29/2017 TIME: 10:40 AM ORGANISM: Daphnia magna <br />TEST START: 3/30/2017 12:30 PM ORGANISM AGE: <24 hours old_ <br />TEST FINISH: 4/1/2017 12:30 PM m..� <br />FRESH SYNTHETIC DILUTIOP <br />AMMONIA: NO <br />HARDNESS: 93.56 mg/L <br />ALKALINITY: 62.29 mg/L <br />CHLORINE: ND <br />DATE(HOURS) CONTROL 6.25 <br />3/30/2017 INITIAL <br />3/31/2017 24 <br />4/1/2017 48 <br />MORTALITY <br />% SURVIVAL <br />D.O.: 6.61 mg/L <br />pH: 7.63 <br />CONDUCTIVITY: 294 microS <br />TEMPERATURE: 19.5 deg C <br />DILUTIONS (%) <br />17 F S1r, An 7F inn <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />20 <br />18 <br />16 <br />20 <br />20 <br />20 <br />20 <br />20 <br />17 <br />13 <br />0 <br />0 <br />0 <br />0 <br />0 <br />3 <br />7 <br />100% <br />100% <br />100% <br />100% <br />100% <br />85% <br />65% <br />WILY CHEMISTRY - (MIN/MAX) DILUTIONS (%) <br />CONTROL 6.25 12.5 25 50 75 100 <br />CONDUCTIVITY (microS) <br />D.O. (mg/L) <br />pH <br />TEMPERATURE (deg C) <br />2941299 1 <br />642/651 1 <br />983/995 <br />1 1679/1694 <br />3040/3060 <br />1 4410/4430 <br />577015800 <br />6.617.3 <br />6.7/7.3 <br />6.817.4 <br />7.017.4 <br />7.217.5 <br />7.4/7.6 <br />7.517.7 <br />7.6/8.2 <br />7.7/8.3 <br />7.8/8.4 <br />7.918.5 <br />8.0/8.6 <br />8.1/8.8 <br />8.319.0 <br />19.1/19.7 <br />19.1/19.7 <br />19.1/19.7 <br />19.1/19.7 <br />19.1/19.7 <br />19.1119.7 <br />19.1/19. <br />CHEMISTRY - Site 2000-84 <br />AMMONIA: 0.17 mg/L <br />HARDNESS: 555.73 mg/L <br />ALKALINITY: 881.50 mg/L <br />CHLORINE: NO <br />NOEC LOEC <br />50% <br />75% <br />DO,,,,,.,: 7.66 mg/L <br />DOaderaerawn: NA <br />pH: 8.15 <br />CONDUCTIVITY: 5,770 microS <br />LCm (Lethal Concentration 50°%) METHOD REFERENCE <br />EPA -821-R-02-012 October 2002 pg.78 <br />>100% CALCULATION METHOD <br />SPEARMAN-KARBER <br />V <br />Analysis <br />Conducted by: 7 <br />Reviewed by: <br />