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COLORADO - CDPS WET TEST REPORT FORM -ACUTE <br />PERM]TTEE: Twentymile Coal Company CDPS NO.: CO-0027154 OUTFACE: OOI. Pond A <br />TYPE TEST: ROUTINE: XX ACCELERATED: TEST SPECIES: D. maQrea <br /> <br />TEST RESULTS: LCSO: 56.1% STATISTICAL METHOD: Trimmed Spearman-Karber <br />TEST TIME & DATE: BEGIN 1245 PM 02/]4/02 END ]215 PM 02/16/02 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5% 25% 50% 75% 100% <br /># START OF TEST: 20 20 20 20 20 20 <br /># ALIVE AFTER 24 HRS: 20 20 20 20 20 14 <br /># ALIVE AFTER 48 HRS: 20 20 19 10 9 3 <br /> <br /> <br />RECEIVING WATER USED FOR DII.UTION? NO TOTAL RESID. Cl' (mg/l): <0.1 <br />HARDNESS (mg/I): RECEIVING WATER: EFFLUENT: 2330 RECON WATER 195 <br />J ALKALINITY (mg/1):RECEIVINGWRTER: EFFLUENT: 465 RECON WATER 160 <br />pH: INITIAL: CONTROL 8.5 100% EFFLUENT 7.9 <br />FINAL: CONTROL 8.6 100% EFFLUENT 8.1 <br />TOTAL AMMONIA AS N (mg/1): INITIAL 100%: <1.0 FINAL 100%: <1.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />~ / <br />LABORATORY: COMMERCIAL TESTING & ENGINEERING ANALYST: ~ ~-~-~"' <br />COMMENTS: <br />4/14/99 <br />