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<br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Twentymile Coal Company CDPS NO.: CO-0027154 OUTFACE: 005 <br />TYPE TEST: ROUTINE: XX ACCELERATED: SPECIES: D. magna <br />TEST RESULTS: LC50: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN: 1500 1/23/08 END: 1500 1/25/08 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5% 25% 50% 75% 100% <br /># @ START OF TEST: 20 20 20 20 20 20 <br /># ALIVE AFTER 24 HRS: 20 20 20 20 20 20 <br /># ALIVE AFTER 48 HRS: 20 20 20 20 20 20 <br /># ALIVE AFTER 72 HRS: <br /># ALIVE AFTER 96 HRS: <br />RECEIVING WATER USED FOR DILUTION? NO TOTAL RESIDUAL CI - (mg/I): <0.1 <br />HARDNESS (mg/I): RECEIVING WATER: EFFLUENT:2500 RECON WATER: 200 <br />ALKALINITY (mg/I): RECEIVING WATER: EFFLUENT: 259 RECON W ATER: 103.5 <br />pH <br />INITIAL <br />FINAL: <br />TOTAL AMMONIA AS N (mg/I) <br />CONTROL 6.8 100% EFFLUENT 7.9 <br />CONTROL 6.7 100% EFFLUENT 8.3 <br />INITIAL 100%: ~0.8 FINAL 100%: -r1.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: SGS North America Inc. ANALYST: Green, Hollidav <br />COMMENTS: <br />04/08/03 <br />6 SGS North America Inc. Minerals Services Division <br />P.O. Box 850, Sophia, WV 25921 t (304) 255-0422 f (304) 255-0417 www.us.sgs.com/minerals <br />Member of the SGS Group <br />F-525 <br />