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SeaCrest Project Number. 399181 <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Peabody Coal CDPS No: CO-0000221 OUTFACE: 003 <br />TYPE TEST: Routine: XX Accelerated: Test Species: Cer(odaphnla du6la <br />TEST RESULTS: LC50: >100°k STATISTICAL METHOD: Probit <br />Test Time & Date: Begin: 11:10, May 19, 1999 End: 11:10, May 21, 1999 <br />Dilutions (Percent Effluent) <br />Meawremenb Control <br />0% 12.5% 26% !{0% 76% 100% XX <br />No. ~ 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 20 20 XX <br />Na. Live after 72 hours xX XX XX Xx XX XX XX <br />No. Lfve after 98 hours XX XX X% XX xX XX xX <br />Receiving Water Used for Dilution: Yes: No: XX Total Resid. Chlorine, mglL: 100°!0: <0.01 <br />Hardness, mg/L: Receiving Water. NA Effluent: 1645 Recon. Water. 90 <br />Alkalinity, mg/L: Receiving Water. NA Effluent: 274 Recon. Water. 49 <br />pH: Initial -Control; 7.7 100%: 8.3 Final -Control: 7.4 100%: 8.3 <br />Total Ammonia as N, mg/L: Initial - 100%: <1.0 Finaf - 100%: NA <br />Were Atl Test Conditions In Conformance With Division Guidelines? Yes <br />LIST DEVIATIONS FROM TEST SPECIFICATIONS: Effluent aerated prior to test setup. Water <br />supersaturated with dissolved oxygen. <br />LABORATORY: THE SEACREST GROUP <br />COMMENTS: <br />ANALYST'S NAME(S): Felicia <br />SIGNATURE/DA <br />