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Aqua -Tox, Inc. <br />i1 r r► 4880 Robb Street, Suite E <br />Wheat Ridge, CO 80033 <br />(303) 621 -4880 www,aqua -tox com <br />�.-- ACUTE TOXICITY REPORT <br />SAMPLE ID. 2000 -84 <br />CLIENT NAME: 20 Mile Coal Compan <br />ATI LOT #. 031814 -1 <br />SAMPLE DATE: 3/17/2014 TIME: 11:00A <br />TEST START- 03 -18 -14 11:30A <br />TEST FINISH. 03-20-1.411:30A <br />TEST RESULT LC50: >100% <br />50% MORTALITY TEST PASS <br />% SURVIVAL 100 % - 100% <br />ORGANISM: Dgp hnia magna <br />ORGANISM AGE: <24 hours old <br />E OF TEST: Acute, LCF,n 48 -hour, static renewal, moderately hard fresh synthetic dilution water <br />AMMONIA. <br />ND <br />D.O,: <br />7.35 mg /L <br />HARDNESS: <br />94 -44 mg /L <br />pH: <br />7.99 <br />ALKALINITY' <br />55.74 mg /L <br />CONDUCTIVITY- <br />310 microS <br />CHLORINE: <br />ND <br />TEMPE= RATURE <br />20.1 deg C <br />iUKVIVAL UAIA DILUTIONS ( %) <br />DATE HOURS CONTROL 6.25 125 25 50 7'i 100 <br />3/18/2014 INITIAL <br />3/19/2014 24 <br />3/20/2014 48 <br />MORTALITY <br />% SURVIVAL <br />20 _ <br />20 <br />_ �20 <br />20 <br />— <br />— 20 <br />20 <br />20 _ <br />20 <br />20 <br />8.1/8.2 <br />20 <br />20 <br />20 <br />20 <br />_._. -20 <br />20 <br />0 <br />20 <br />_ 20 <br />20 <br />0 <br />20 <br />0 <br />20 _ <br />20 � <br />0 <br />0 <br />100% <br />100% <br />00% <br />�100()%'-- <br />f-40:-1. <br />- (MIN /MAX) DILUTIONS ( %} <br />CONTROL 6.25 12 -5 25 5n 75 inn <br />C:C)NI�t1C riVS'1 Y ; ru.;oS` <br />l (mg /L' <br />pH <br />TI-NIPFRA I UHL (deg C) <br />310/341 <br />7 4/7.6 <br />599/629 <br />7.4/7.6 <br />842/877 <br />7.417.8 <br />'1377/14232450/2670 <br />7.418 0 <br />7.4/8.4 <br />3610/3750 <br />7.4/8.5 <br />4720/4800 <br />7.4/8.$ <br />8.0/8.0 <br />8.1/8.2 <br />8.2/8.4 <br />8.2/85 <br />8.3/8.7 <br />82/8.8 <br />8.2/8.8 <br />20.1/20.7 <br />20.1/20.7 <br />20.1/20.7 <br />20.1120.7 <br />20.1120.7 <br />20.1/20.7 <br />20.1/20.7 <br />RY - 2000 -84 <br />AMMONIA: 0 11 mg /l_ <br />HARDNESS: 1134.84 mg /L <br />ALKALINITY, 1568.00 mg /L <br />CHLORINE: ND <br />NOEC 11 LOEC <br />i it - 100;; <br />DDITIONAI COMMENT; - -- <br />Analysis <br />+conducted by I < <br />Date, <br />{ <br />DO,,;,,,,,, <br />8.76 mgll <br />DU, re� ,,1, .,m 1 : <br />NA <br />pH: <br />8.20 <br />CONDUCTIVITY: <br />4730 microS <br />CALCULATION METHOD <br />SPEARMAN- KARBER <br />Reviewed by" <br />Date: <br />METHOD REFERENCE <br />EPA - 821 -R -02 -012 October 2002 pg.78 <br />-f <br />