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COLORADO - CDPS WET TEST REPORT FORM - ACUTE <br />PERMITTEE: Twentymile Coal Company CDPS NO.: CO-0036684 OUTFALL: 62 FCT <br />TYPE TEST: ROUTINE: XX ACCELERATED: SPECIES: C. dubia <br />TEST RESULTS: LC50: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN: 1230 05/20/08 END: 1230 05/22/08 <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 Cl " (mg/1): <0.1 <br />HARDNESS (mg/1): RECEIVING WATER: EFFLUENT: 2637 RECON WATER: 91 <br />ALKALINITY (mg/1): RECEIVING WATER: <br />pH: INITIAL: CONTROL <br />FINAL: CONTROL <br />EFFLUENT: 264 RECON WATER: 64 <br />7.9 100% EFFLUENT 7.9 <br />7.9 100% EFFLUENT 7.9 <br />TOTAL AMMONIA AS N (mg/1): INITIAL 100%: <1.0 FINAL 100%: <1.0 <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. <br />COMMENTS: <br />ANALYST: Holliday, Green, Pauley <br />04/08/03