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DocuSign Envelope ID: D07924E6-3D94-4398-A066-B683COBAB33E <br /> Table 18: Wet chemistry on reconstituted water and treated effluent samples used for chronic <br /> toxicity tests in Round 2. <br /> MH Recon Water 100% <br /> Measurement for Samples Received 0.25 g ethanol/g SO4 <br /> 11/17/20* Received 11/17/20 <br /> Analysis Temperature(°C) 25.0 25.0 <br /> Total Hardness(mg CaCO3/L) 96 690 <br /> pH (SU) 8.2 8.5 <br /> Alkalinity(mg CaCO3/L) 69 1220 <br /> Conductivity(pmho/cm) 319 3950 <br /> Total Dissolved Solids Calculated -- 1933 <br /> from Conductivity(mg/L) <br /> Dissolved Oxygen (mg/L) 7.1 8.8 <br /> Ammonia as N <br /> (mg NH3/L) -- 0.04 <br /> Un-ionized Ammonia(mg NH3/L) -- <0.10 <br /> Total Residual Chlorine(mg/L) -- <0.02 <br /> *Represents an average of three reconstituted waters used. <br /> GEI Consultants,Inc. 20 February 2021 <br /> Ecological Division Whole Effluent Toxicity Test Report <br /> Stantec-Elk Ridge Mining and Reclamation,LLC <br />