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COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Twentvmile Coal Company CDPS NO.: CO-0036684 OUTFACE: 62 FCT <br />TYPE TEST: ROUTINE: XX ACCELERATED: SPECIES: C. dubia <br />TEST RESULTS: LCD: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN: 0900 08/08/2007 END: 0900 08/10/2007 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5% 25% 50% 75% 100% <br /># @ START OF TEST: 20 20 ZO 20 20 20 <br /># ALIVE AFTER 24 HRS: 20 20 20 20 20 20 <br /># ALIVE AFTER 48 HRS: 19 20 17 17 16 18 <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; 1680 RECON WATER: 90 <br />ALKALINITY (mg/I): RECEIVING WATER: EFFLUENT: 437 RECON W ATER: 73 <br />pH: INITIAL: CONTROL 7.7 100% EFFLUENT 8.2 <br />FINAL: CONTROL 7.8 100% EFFLUENT 8.3 <br />TOTAL AMMONIA AS N (mg/l): INITIAL 100%: 0.6 FINAL 100%: 0.6 <br />WERE ALL TEST CONDITIONS IN CONFORM ANCE W ITH DIVISION GUIDELINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: SGS North America Inc. ANALYST: Holliday, Wehrle <br />COMMENTS: <br />04/08/03 <br />