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L1~ COMMERGIALTESTING & ENGINEERING GO <br />61NCE "~ COLORADO - CDPS WET TEST REPORT FORM -ACUTE <br />PERMITTEE: Beaz Coal Company CDPS NO.: CO-0044377 OUTFACE: 001 <br />TYPE TEST: ROUTINE: XX ACCELERATED: TEST SPECIES: C. dubia <br />TEST RESULTS: LCso: 85.4% STATISTICAL METHOD: Trimmed Spearman-Kazber <br />TEST TIlVIE & DATE: BEGIN 1130 AM 5/01/02 <br />END 1050 AM 5/03/00 <br />DILUTIONS (% EFFLUENT) <br />MEASUREMENTS 0% 1.7% 25% 50% 75% 100% <br /># START OF TEST: 20 20 20 20 20 20 <br /># ALIVE AFTER 24 HRS: 20 20 20 20 20 18 <br /># ALIVE AFTER 48 HRS: 20 20 19 20 16 3 <br /> <br /> <br />RECEIVING WATER USED FOR DILUTION? NO TOTAL RESID. CI " (mg/1): NA <br />HARDNESS (mg~l): RECEIVING WATER: EFFLUENT: 0 RECON WATER 135 <br />ALKALINITY (mg/1): RECEIVING WATER EFFLUENT: 1730 RECON WATER 90 <br />pH: INITIAL: CONTROL 8.3 100% EFFLUENT 8.8 <br />FINAL: CONTROL 8.2 100% EFFLUENT 9.2 <br />TOTAL AMMONIA AS N (mg/1): INITIAL 100%: NA FINAL 100%: NA <br />WERE ALL TEST CONDITIONS IN CONFORMANCE WITH DIVISION GUIDELINES? NO <br />IF NO, LIST DEVIATIONS FROM TEST SPECIFICATIONS: Ammonia and CI- analysis was not <br />performed because both required colorimetric analysis. which was difficult due to the dazk amber hue of the <br />effluent. /~ ~ <br />LABORATORY: COMMERCIAL TESTING & ENGINEERING ANALYST: «-~` <br />COMMENTS: <br />4/14/99 <br />