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Aqua-Tox, Inc. <br />4880 Robb Street, Suite 8 <br />Wheat Ridge, CO 80033 <br />(303) 621-4880 aqua-tox.com <br />- 4th Accelerated <br />LIENT NAME: Twentvmile Coal Company SAMPLE I.D.: 092509-1 <br />D % MORTALITY TEST: Pass TEST RESULT LC50: >100% <br />SURVIVAL IN 100% DILUTION: 60% <br />AMPLE DATE: 9-24-09 TIME: 15:45PM CLIENT ID: Site 62 <br />RGANISM: Ceriodaphnia dubia AGE: < 24 hours old <br />EST START: 9-25-09 10:20AM TEST FINISH: 9-27-09 10:20AM <br />YPE OF TEST: LC50, 48 hours, static, renewal, moderately hard fresh synthetic dilution water. <br />AMMONIA: ND <br />HARDNESS: 93.20 mg/L <br />ALKALINITY: 55.19 mg/L <br />pH: 7.95 <br />DATE HOURS CONTROL 6.25 <br />9/25/2009 INITIAL <br />9/26/2009 24 <br />9/27/2009 48 <br />MORTALITY: <br />% SURVIVAL: <br />D.O.: 7.05 mg/L <br />CHLORINE: ND <br />TEMPERATURE: 20.3 deg C <br />DILUTIONS (%) <br />125 95 rn 7S 1 no <br />20 20 20 20 20 20 20 <br />20 20 20 20 20 20 20 <br />20 20 20 20 20 19 12 <br />0 0 0 0 0 1 8 <br />100% 100% 100% 100% 100% 95% 60% <br />RY - (MIN/MAX) DILUTIONS (%) <br />D R PS 12 5 9r; r;n 7R i nn <br />CONDUCTIVITY (microS <br />D.O. (mg/L; <br />pH <br />TEMPERATURE (deg C, <br />316/328 583/601 850/884 1281/1346 2390/2450 3200/3280 3910/4080 <br />7.1/7.3 7.1/7.3 7.0/7.3 7.0/7.3 7.0/7.3 7.0/7.3 7.0/7.3 <br />8.0/8.1 8.0/8.2 8.0/8.3 8.0/8.4 8.0/8.5 8.0/8.3 7.9/8.1 <br />19.8/20.3 19.8/20.3 19.8/20.3 19.8/20.3 19.8/20.3 19.8/20.3 19.8/20.3 <br />rRY - SAMPLE <br />AMMONIA: ND <br />HARDNESS: 2300.00 mg/L <br />ALKALINITY: 417.95 mg /L <br />pH: 7.93 <br />D.O.: 7.00 mg/L <br />CHLORINE: ND <br />TEMPERATURE: 20.3 deg C <br />D.O AFTER AERATION: NA <br />ANOEC CALCULATION METHOD METHOD REFERENCE <br />75% SPEARMAN-KARBER EPA -821-R-02-012 October 2002 pg.78 <br />ADDITIONAL COMMENTS: <br />Analysis <br />Conducted by: Reviewed by: <br />Date: Date: