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i <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Twentvmile Coal Company CDPS NO.: CO-G~~36684 OUTFACE: 62 FCT <br />TYPE TEST: ROUTINE: XX ACCELERATED: SPECIES: P. promelas <br />TEST RESULTS: LCD: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN: 1025 3/29/2006 END: 1115 4!02/2006 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 12.5% 25% 50% 75% 100% <br /># START OF TEST: 40 40 40 40 40 40 <br /># ALIVE AFTER 24 HRS: 40 40 38 40 40 38 <br /># ALIVE AFTER 48 HRS: 40 40 38 39 40 37 <br /># ALIVE AFTER 72 HRS: 39 39 38 38 39 36 <br /># ALIVE AFTER 96 HRS: 39 39 37 38 39 36 <br />RECEIVING WATER USED FOR DILUTION? NO <br />HARDNESS (mg/I): RECEIVING WATER: <br />TOTAL RESIDUAL CI " (mg/I): <0.1 <br />EFFLUENT: 1980 RECON WATER: 75 <br />ALKALINITY (mg/I): RECEIVING WATER: EFFLUENT: 485 RECON WATER: 58 <br />pH: INITIAL: CONTROL 8.3 100% EFFLUENT 7.9 <br />FINAL: CONTROL 7.8 100% EFFLUENT 8.1 <br />TOTAL AMMONIA AS N (mg/I): 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 />LABORATORY: SGS North America Inc <br />COMMENTS: <br />ANALYST: Maher Sto <br />04/08/03 <br />6 <br />SGS North America Inc. Minerals Services Division <br />4665 Paris Street, Suite 8-200. Denver, CO 80239 t 13031373-4772 <br />I Member of fhe SGS Group <br />F-525 <br />