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COLORADO -CDPS WET TEST REPORT FORM -CHRONIC <br />PERMITTEE: Twentymile Coal Co. CDPS NO.: CO-0027154 OUTFACE: 84 Pond D <br />TYPE TEST: ROUTINE: XX ACCELERATED: TEST SPECIES: P. promelas <br />TEST RESULTS LETHALITY GROWTH STATISTICAL METHOD <br />Concentration with Statistical Difference >100°1° >100°!° Dunnett'slSteel's Many-One <br />Pass/Fail Pass N/A <br />ICZSPoint Estimate >100% >100% Bootstrap <br />Pass/Fail Pass N/A <br />TEST TIME & DATE START 9/11/2007 1000 END 9/18/2007 1000 <br />DILUTION (% EFFLUENT) <br />MEASUREMENTS CONTROL 12.5% 25% 50% 75% 100% <br />Day 1 % Survival 100 100 100 100 100 100 <br />Day 2 100 100 100 100 100 100 <br />Day 3 100 100 97.5 100 100 100 <br />Day 4 100 100 92.5 100 97.5 95 <br />Day 5 100 97.5 90 95 90 90 <br />Day 6 97.5 97.5 90 95 85 90 <br />Day 7 97.5 97.5 90 95 85 87.5 <br /> <br />7 Day Mean Dry Weight 0.339 0.299 0.322 0.297 0.303 0.299 <br /> <br />pH (Maximum/Minimum) 7.7/7.2 7.8/7.3 7.8!7.4 7.9/7.4 7.9/7.8 8.1/7.8 <br />RECEIVING WATER USED FOR DILUTION? NO TOTAL RESIDUAL CC (mg/I): <0.1 <br />HARDNESS (mall): REC'V WATER: EFFLUENT: 850 RECON WATER: 70 <br /> <br />ALKALINITY (ma/I): REC'V WATER: EFFLUENT: 207 RECON WATER: 81 <br /> <br />TOTAL AMMONIA (m a/I): INITIAL 100%: =0.1 FINAL 100%: =0.2 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUDECINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: SGS NORTH AMERICA INC. ANALYST: KH/KW <br />6 <br />