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COLORADO - CDPS WET TEST REPORT FORM - CHRONIC <br />PERMITTEE: Twentymile Coal Co. CDPS NO.: CO-0034142 OUTFALL: 5 D <br />TYPE TEST: ROUTINE: XX ACCELERATED:- TEST SPECIES: P. promelas <br />TEST RESULTS LETHALITY GROWTH STATISTICAL METHOD <br />Concentration with Statistical Difference >100% >100% Bonferroni T-test/Bonferroni T-test <br />Pass/Fail Pass N/A <br />IC25 Point Estimate >100% >100% Bootstrap <br />Pass/Fail Pass N/A I :J <br />TEST TIME & DATE START 05/06/08 1000 END 05/13/08 1000 <br />1711 I ITinN (%, FFFI I IFNTI <br />MEASUREMENTS CONTROL 12.5% 25% 50% 75% 100% <br />Da 1 % Survival 100 92.5 100 96.6 95 100 <br />Da 2 100 90 97.5 96.6 92.5 97.5 <br />Da 3 100 85 97.5 93.3 87.5 97.5 <br />Da 4 97.5 80 97.5 86.6 80 97.5 <br />Da 5 97.5 77.5 95 83.3 77.5 92.5 <br />Da 6 97.5 75 95 76.6 77.5 92.5 <br />Da 7 97.5 72.5 92.5 73.3 72.5 90 <br /> <br />7 Da Mean D Weight 0.228 0.182 0.234 0.219 0.168 0.178 <br /> <br />H Maximum/Minimum) 7.2/8.0 7.2/8.1 7.4/8.3 7.7/8.5 8.0/8.7 8.2/9.0 <br />RECEIVING WATER USED FOR DILUTION? NO TOTAL RESIDUAL Cl- (mg/1): <0.1 <br />HARDNESS (mg/1): REC'V WATER: EFFLUENT: 35 RECON WATER: 92 <br />ALKALINITY (mg/1): REC'V WATER: EFFLUENT: 809 RECON WATER: 73 <br />TOTAL AMMONIA (mg/1): INITIAL 100%: <0.1 FINAL 100%: <0.1 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? NO <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: the fourth rep in the 50% P.promelas dilution was <br />dropped: therefore, only three reps were used regarding this dilution data. <br />LABORATORY: SGS NORTH AMERICA INC. ANALYST: SG/KH/SP