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L~ COMMERCIALTESTING 6 ENGINEERINGOO. <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Twentvmile Coal Company CDPS NO.: CO-0027154 OUTFACE: 001. Pond A <br />TYPE TEST: ROUTINE: ACCELERATED: XX TEST SPECIES: D. magrw <br />TEST RESULTS: LCso: 36.3% STATISTICAL METHOD: Spearman-Kazber <br />TEST TIME & DATE: BEGIN l 125 AM 03/] 3/0 END 1220 PM 03/] 5/02 <br />DII.UTIONS (%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 14 8 10 <br /># ALIVE AFTER 48 HRS: 20 20 20 1 0 0 <br /> <br /> <br />RECEIVING WATER USED FOR DILUTION? NO TOTAL RESID. Cl " (mg/1): <0.1 <br />HARDNESS (mg/1): RECEIVING WATER: EFFLUENT: 2215 RECON WATER: 185 <br />ALKALINITY (mg/1): RECEIVING WATER: EFFLUENT: 455 RECON WATER 165 <br />pH: INITIAL: CONTROL 8.6 100% EFFLUENT 8.0 <br />FINAL: CONTROL 8.5 ]OG°Jo EFFLUENT 8.] <br />TOTAL AMMONIA AS N (mg/I): INITIAL ]00%: <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: ~/~~ f "~'- <br />COMMENTS: Accelerated test #2 <br />4/19/99 <br />