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COLORADO - CDPS WET TEST REPORTFORM -CHRONIC <br />PERMITTEE: Twemymile Coal Co. CDPS NO. CO-0027154 OUTFACE: 447 <br />TYPE TEST: ROUTINE: ?CX ACCELERATID:_ TEST SPECIES: romelas <br />TEST RESULTS LETHALITY GROWTH STATISTICAL METHOD <br />Concentration with Statistical Difference >]00% >]00% Steel's/Dunnett's <br />Ptw/Feil Pass N/A <br />1 12.5% • >]00% Boo <br />Pw/Fail Fail N/A ' 95% Confidence Limits <br />Unreliable <br />TEST TIME & DATE START 1215 PM 04/25/00 END 1230 PM OS/O7J00 <br />DILUTION (% EFFLUENT) <br />MEASUREMENTS CONTROL 12.5% 25% 50% 75% 100°/a <br />De 1 % Survival 100 100 100 100 ]00 100 <br />Da 2 100 100 100 100 ]00 100 <br />Da 3 100 100 100 100 100 100 <br />Da 4 100 100 100 95.0 100 100 <br />Da 5 100 95.0 92.5 77.5 95.0 97.5 <br />Da 6 100 80.0 75.0 62.5 87.5 95.0 <br />Da 7 100 75.0 70.0 47.5 85.0 95.0 <br /> <br />7 Da Mean Wei t 0.409 0.362 0.225 0.162 0.375 0.459 <br /> <br />H imum/Minimum 8.4!1.5 8.4/7.5 8,301.0 8.4!1.3 8.401.5 8.5/7.7 <br />RECEIVING WATER USID FOR DILUTION? N~ TOTAL RESIDUAL Cl" (mg/I): <~.1 <br />HARDNESS (m~/q: REC'V WATER: EFFLUENT: 1277 RECON WATER: 117 <br />ALKALINTfY (mg~ll: REC'V WATER: EFFLUENT: 225 RECON WATER: 85 <br />TOT. AMMONIA Lmp,[I~: lIQI'I'lAL 100%: <1.0 FINAL 100%: <1.0 <br />WERE ALL TEST CONDTI'IONS IN CONFORMANCE WITH DMSION GUIDELINES? y$$ <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: COMMERCIAL TESTING & ENGINEERING ANALYST: G(,~.~..- .~ <br />4/14/99 <br />COM MERCIAL TESTING & ENGINEERING CO. <br />d Watermarked For Vour Protection ~~~ <br />