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<br />COMMEROIA~TESTING 8 ENGINEERING 00. <br />COLORADO - CDPS WET TEST REPORT FORM - ACi1TE <br />PERMITTEE: TwentymileCoal Company CDPS NO.: CO-0027]54 OUTFACE: 001_ Pond A <br />TYPE TEST: ROUTINE: ACCELERATED: XX TEST SPECIES: D. maQrra <br />TEST RESULTS: LCso: 56.3% STATISTICAL METHOD: Probit <br />TEST TIME & DATE: BEGIN 1155 AM 02/28/02 END 1300 PM 03/02/02 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5°l0 25°lo SO"/o 75% 100% <br /># START OF TEST: 20 20 20 _. _ _ __ 20 20 20 <br /># ALIVE AFTER 24 HRS: 20 24 20 20 19 17 <br /># ALIVE AFTER 48 HRS: 20 20 lb 4 1 3 <br /> <br /> <br />RECEIVING WATER USED FOR DILUTION? NO TOTAL RESID. Cl' (mg/1): <0.1 <br />HARDNESS (mg/1): RECEIVING WATER: EFFLUENT: 2265 RECON WATER: 205 <br />ALKALITIITY (mg/I): RECEIVING WATER: EFFLUENT: 475 RECON WATER 170 <br />pH: INITIAL: CONTROL 8.6 100% EFFLUENT 8.0 <br />FINAL: CONTROL 8.6 l00% EFFLUENT 8.1 <br />TOTAL AMMONIA AS N (mgA): INITIAL 100%: <1.0 FINAL 100%: <1.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? YES <br />IF NQ LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: COMMERCIAL TESTING & ENGINEERING ANALYST: ~~~`-"~ <br />COMMENTS: Accelerated test #1 <br />4/14/99 <br />