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~G~ <br />Results <br />• WHOLE EFFLUENT TOXICITY BIOASSAY <br />The effluent sample did indicate acute toxicity towards Pimephales promelas survival but not to <br />Daphnia Magna survival. The following table highlights statistical endpoints for each species <br />tested: <br />SPECIES LCD IC25' NOEC° LOECS <br />Fathead minnow 86.6% - 75% 100% <br />Daphnia Magna >100% - 100% >100% <br />• EFFLUENT AND LABORATORY WATER CHEMISTRIES <br />PARAMETER EFFLUENT MH LAB <br />WATER HARD LAB <br />WATER <br />Dissolved Oxygen (mg/L) 8.3 8.2 7.3 <br />pH (Standard Units) 8.1 8.3 8.6 <br />Hardness (mg/L CaCOa) 2300 80 175 <br />Alkalinity (mg/L CaCOa) 375 58 125 <br />Ammonia (mg/L as N) = 1.0 <1.0 <1.0 <br />Residual Chlorine (mg/L) <0:1 <0.1 <0.1 <br />Conductivity (µmhos/cm) 3750 330 580 <br />FATHEAD MINNOW AND DAPHNIA MAGNA SURVIVAL DATA <br />CONCENTRATION ORGANISMS EXPOSED <br />DM FH MORTALITIES <br />DM FH % SURVIVAL <br />DM FH <br />Control 20 40 0 1 100 97.5 <br />12.5% 20 40 0 0 100 100 <br />25% 20 40 0 3 100 92.5 <br />50% 20 40 0 16 100 60 <br />75% 20 40 0 16 100 60 <br />100% 20 40 0 24 100 40 <br />'Inhibition Concentration at 25% Reduction <br />° No Observed Effect Concentration <br />e Lowest Observed Effect Concentration <br />3 SGS North America Inc. Minerals Services Division <br />4665 Paris Street. Suite B-200. Denver. CO 80239 t 13031373-4772 f 13 031 313-4791 <br />F szs Member of the SGS Group <br />