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<br /> <br />Results <br />• WHOLE EFFLUENT TOXICITY BIOASSAY <br />ADDRESS ALL CORRESPONDENCE TO: <br />COMMERCIALTESTING & ENGINEERING CO. <br />4665 PARIS STREET, SUfTE &200 <br />DENVER, CO 80239 <br />TEL (303) 3734772 <br />FAX: (303) 3734797 <br />The effluent sample did not indicate acute toxicity towards Pimephales promelas and Daphnia <br />magna survival. The following table highlights statistical endpoints for each species tested: <br />SPECIES LC5° ICZS° NOEC` LOECS <br />Fathead minnow >100% - 100% >100% <br />Daphnia magna >100% 100% >100% <br />• EFFLUENT AND LABORATORY WATER CHEMISTRIES <br />•~ <br />l <br />PARAMETER EFFLUENT MEDIUM HARD <br />LAB WATER HARD LAB <br />WATER <br />Dissolved Oxygen (mglL) 8.2 8.3 8.0 <br />pH (Standard Units) 7.8 8.0 8.5 <br />Hardness (mg/L CaC03) 2350 125 220 <br />Alkalinity (mg/L CaCOa) 365 95 125 <br />Ammonia (mg/L as N) X2.0 <1.0 <1.0 <br />Residual Chlorine (mg/L) <0.1 <0.1 <p.1 <br />Conductivity (µmhos/cm) 2820 520 651 <br />• FATHEAD MINNOW AND DAPHNIA MAUNA SURVIVAL DATA <br />CONCENTRATION ORGANISMS EXPOSED <br />DM FH MORTALITIES <br />DM FH %MORTALITY <br />DM FH <br />100% 20 40 0 0 0.00 10.00 <br />75% 20 40 0 0 0.00 0.00 <br />50% 20 40 0 0 0.00 0.00 <br />25% 20 40 0 0 0.00 0.00 <br />12.5% 20 40 0 0 0.00 0.00 <br />Control 20 40 0 1 0.00 2.50 <br />I <br />~ F525 <br />a Inhibition Concentration at 25% Reduction <br />` No Observed Effect Concentration <br />6 Lowest Observed Effect Concentration <br />3 Commercial Testing & Engineering Co. I Minerals Services -Corporate Office <br />1979 S. Highland Ave.. Suite 2108, Lombard, IL 60148 t (6301953-9300 f 16301953-9306 www.sgs.com <br />Member pl We SGS Group ISpcidt6 G4ndrale da Surveillance) <br />