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L^~ COMMERCIALTESTING & ENGINEERING CO. <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMTTTEE: Mountain Coal Company CDPS NO.: CO-0038776 OUTFACE: 017 <br />TYPE TEST: ROUTINE: XX ACCELERATED: TEST SPECIES: D. magna <br />TEST RESULTS: LCso: >100% STATISTICAL METHOD: Probit <br />TEST TIME & DATE: BEGIN 1200 PM 01/08/03 END 1115 AM 01/10/03 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 1.9% 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: 20 20 20 20 19 12 <br /> <br /> <br />RECENING WATER USED FOR DILUTION? NO TOTAL RESID. Cl ~ (mg/1): <0.1 <br />HARDNESS (mg/I): RECENING WATER: EFFLUENT: 70 RECON WATER: 210 <br />ALKALIlVITY (mg/1}:RECENING WATER: EFFLUENT: 1920 RECON WATER: 160 <br />pH: INITIAL: CONTROL 8.6 100% EFFLUENT 8.3 <br />FINAL: CONTROL 8.4 100% EFFLUENT 9.1 <br />TOTAL AMMONIA AS N (mg/1): INITIAL 100%: X1.0 FINAL 100%: -1.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DNISION GUIDELINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: COMMERCIAL TESTING & ENGINEERING ANALYST: ~` <br />COMMENTS: <br />4/14/99 <br />