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<br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Twentymile Coal Company CDPS NO.: CO-0036684 OUTFACE: 62 FCT <br />TYPE TEST: ROUTINE: XX ACCELERATED: SPECIES: C. dubia <br />TEST RESULTS: LC50: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN: 1100 11/30/07 END: 1100 12/02/07 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5% 25% 50% 75% 100% <br /># @ START OF TEST: <br /># ALIVE AFTER 24 HRS: 20 <br />20 20 <br />20 20 <br />20 20 <br />20 20 <br />20 20 <br />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 CI " (mg/I): <0.1 <br />HARDNESS (mg/I): RECEIVING WATER: EFFLUENT: 2310 RECON WATER: 90 <br />ALKALINITY (mg/I): RECEIVING WATER: EFFLUENT: 607 RECON W ATER: 67 <br />pH: INITIAL: CONTROL 7.6 100% EFFLUENT 7.7 <br />FINAL: CONTROL 7.8 100% EFFLUENT 7.9 <br />TOTAL AMMONIA AS N (mg/I): INITIAL 100%: <1.0 FINAL 100%: <1.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? YES <br />fF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: SGS North America Inc. <br />ANALYST: Holliday, Wehrle <br />COMMENTS: <br />04/08/03 <br />7 <br />