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<br />COLORADO - CDPS WET TEST REPORT FORM - CHRONIC <br />PERMIITEE NAME: New Elk Coal Company CDPS NO: CO-0000906 OUTFALL: <br />TYPE TEST:ROUTINE X ACCELERATED TEST SPECIES Ceriodaphnia dubia <br />Test Results: Lethality Growth Reproduction <br />CONC. WITH STAT. <br />DIFFERENCE 100% NA 57% <br />PASS/FAIL PASS NA NA <br />1C25 69.0% (95% C.1. 54.0-79.2) NA 35.6% (95% C.I.29.8-36.8) <br />PASS/FAIL PASS NA NA <br />STAT. METHOD USED: STATISTICAL DIFF.: NOEC.. LCsn IC25 ICD METHOD <br />DATE: START 11/17/0916:15 END 11/24/0916:30 <br />DILUTIONS (% EFFLUENT) <br /> CONTROL 12.5% 25% 57% 75% 100% <br />% SURVIVAL FOR DAY: 1 100 100 100 100 100 10 <br />2 100 100 100 100 100 0 <br />3 100 100 100 100 100 0 <br />4 100 100 100 100 100 0 <br />5 90 100 100 100 90 0 <br />6 90 100 100 100 70 0 <br />7 90 90 100 90 60 0 <br />MEAN 3 BROOD TOTAL: 29.5 29.7 30.9 7.3 2.9 0.0 <br />7 DAY MEAN DRY WEIGHT: <br />pH MAX/MIN 8.24/8.04 8.82/8.07 8.95/8.86 9.15/9.05 9.19/9.09 9.17/9.17 <br />MEAN HARDNESS (mg/L) RECEIVING WATER: NA EFFLUENT: 58 RECON WATER: 98 <br />MEAN ALKALINITY (mg/L) RECEIVING WATER: NA EFFLUENT: 1581 RECON WATER: 66 <br />MEAN T. AMMONIA as N (mg/L) INITIAL EFFLUENT: 1.1 FINAL EFFLUENT: NA <br />MEAN T. RESIDUAL CHLORINE (mg/L) 100%: 0.05 RECEIVING WATER USED FOR DILUTIONS? (YIN) N <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? (Y/N) Y <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS <br />ANALYST: Drew Allen <br />LABORATORY: GEI Consultants. Inc./Ecological Division <br />COMMENTS: <br />SIGNATURE: <br />DATE: 12/8/09 <br />J