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LIE. COMMERCIAL TESTING & ENGINES RING CO. <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Twentvmile Coal Comvany CDPS NO.: CO-0027154 OUTFACE: 007. Pond F <br />TYPE TEST: ROUTINE: XX ACCELERATED: TEST SPECIES: D. magna <br />TEST RESULTS: LCso: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN 1145 AM 04/03/03 END 1045 AM 04/05/03 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5% 25% 50% 75% 100% <br /># START OF TEST: 20 20 20 20 20 20 <br /># ACNE AFTER 24 HRS: 20 20 20 20 20 19 <br /># ACNE AFTER 48 HRS: 19 20 20 20 20 19 <br /> <br /> <br />RECENING WATER USED FOR DILUTION? NO TOTAL RESID. Cl - (mg/1): ~.1 <br />HARDNESS (mg/1): RECENING WATER: EFFLUENT: 1050 RECON WATER: 200 <br />ALKALINITY (mg/1):RECENING WATER: EFFLUENT: 115 RECON WATER: 160 <br />pH: INITIAL: CONTROL 8,3 100% EFFLUENT 9.1 <br />FINAL: CONTROL 8.6 100% EFFLUENT 8.5 <br />TOTAL AMMONIA AS N (mg~l): INITIAL 100%: <I.0 FINAL 100%: <I.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DMSION GUIDELINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: ,e ~ _ <br />LABORATORY: COMMERCIAL TESTING & ENGINEERING ANALYST: (~.<.~..-~ <br />COMMENTS: <br />4/14/99 <br />