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SeaCrest Project Number: 300228 <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Seneca Coal Mine CDPS No: CO-0000221 OUTFACE: 010 <br />TYPE TEST: Routine: XX Accelerated: Test Species: Ceriodaphnia dubia <br />TEST RESULTS: LC50: >100% STATISTICAL METHOD: Probit <br />Test Time & Date: Begin: 10:20, May 16, 2000 End: 10:20, May 18, 2000 <br />Dilutions (Percent Effluent) <br />Measurements Control <br />0%) 12.5% 259'e 50% 75% 100% XX <br />No. (d1 Start of Test 20 20 20 20 20 20 XX <br />No. Live after 24 hours 20 20 20 20 20 20 XX <br />No. Live after 48 hours 20 20 20 20 19 20 XX <br />No. Live after 72 hours XX XX XX XX XX XX XX <br />No. Live after 96 hours XX XX XX XX XX XX XX <br />Receiving Water Used for Dilution: Yes: No: XX Total Resid. Chlorine, mg/L: 100%: <0.01 <br />Hardness, mg/L: Receiving Water. NA Effluent: 904 Recon. Water. 90 <br />Alkalinity, mg/L: Receiving Water: NA Effluent: 240 Recon. Water. 51 <br />pH: Initial -Control: 7.8 100%: 8.2 Final -Control: 7.4 100%: 8.3 <br />Total Ammonia as N, mg/L: Initial - 100%: <1.0 Final - 100%: NA <br />Were All Test Conditions In Conformance With Division Guidelines? Yes <br />LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: THE SEACREST GROUP <br />COMMENTS: EfFluent aerated prior to test setup to lower DO -supersaturated with dissolved <br />oxygen. <br />ANALYST'S NAME(S): Geoff Henderson <br />SIGNATURE/DA <br />