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~~ ~ - <br />I ADDRESS ALL CORRESPONDENCE TO: <br />COMMERCIAL TESTING 8 ENGINEERING CO. <br />4665 PARIS STREET SUITE 5-200 <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE OTELV(303) 37se-ani <br />I FAX: (303) 3731791 <br />PERMITTEE: Twentvmile Coal Company CDPS NO.: CO-0036684 OUTFACE: 62-FCT <br />I TYPE TEST: ROUTINE: XX ACCELERATED: _ SPECIES: P. promelas <br />TEST RESULTS: LCso: >100% STATISTICAL METHOD: Binomial <br />TEST TIME & DATE: BEGIN: 0815 AM 05/28/03 END: 1030 AM 06/01/03 <br />I 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 40 40 39 39 <br /># ALIVE AFTER 48 HRS: 40 40 40 40 38 38 <br /># ALIVE AFTER 72 HRS: 40 40 40 40 37 35 <br /># ALIVE AFTER 96 HRS: 40 40 40 40 37 34 <br />I RECEIVING WATER USED FOR DILUTION? NO TOTAL RESIDUAL CI - (mgA): <0.1 <br />HARDNESS (mg/I): RECEIVING WATER: EFFLUENT: 2480 RECON WATER: 145 <br />' ALKALINITY (mg/I): RECEIVING WATER: EFFLUENT: 460 RECON WATER: 90 <br />pH: INITIAL: CONTROL 8.5 100% EFFLUENT 7.9 <br />' FINAL: CONTROL 8.2 100% EFFLUENT 8.0 <br />TOTAL AMMONIA AS N (mgfl): INITIAL 100%: <1.0 FINAL 100%: <br />' <1.0 <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? YES <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: <br />LABORATORY: SGS COMMERCIAL TESTING & ENGINEERING ANALYST: <br />COMMENTS: <br />i 04/08/03 <br />6 Commercial Testing & Engineering Co. Minerals Services -Corporate Office <br />1919 S. Highland Ave., Suite 2108, Lombard, IL 60148 t (6301953-9300 f 16301953-9306 www.sgs.com <br />Member al the 565 Gmup ISOCihb G6n6rale °e 6urveillence) <br />