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DocuSign Envelope ID: D07924E6-3D94-4398-A066-B683COBAB33E <br /> 4.6 Pimephales promelas Chronic Toxicity Test <br /> TEST: 7-day chronic with Pimephales promelas OPERATORS: JW, AW, TE, CL <br /> Start: 11/5/20 13:15 <br /> End: 11/12/20 12:25 <br /> Test Substance: 1.0 g ethanol/g SO4-treated Effluent <br /> Client/Project: Elk Ridge Mining and Reclamation, LLC <br /> Table 14: Summary results of P.promelas chronic toxicity test. <br /> Treatment 0 100 <br /> %Treated Effluent <br /> #alive/#exposed 28/40 30/40 <br /> %survival 70 75 <br /> Dry weight(mean wt. (mg)/ 0.303 0.198 <br /> #exposed±SD) ±0.178 ±0.055 <br /> Dissolved 02 range 5_4 5_7 <br /> (mg/L) 4.7 3.6 <br /> pH range(SU) 8_0 8_7 <br /> 7.7 8.4 <br /> Conductivity range 398 4580 <br /> (pmho/cm) 343 3930 <br /> Temperature range(°C) 24.9 24.9 <br /> 21.0 21.8 <br /> "Control performance criteria not met for survival. <br /> Statistical Analysis not conducted due to control performance criteria not being met <br /> (invalid test) <br /> GEI Consultants,Inc. 16 February 2021 <br /> Ecological Division Whole Effluent Toxicity Test Report <br /> Stantec-Elk Ridge Mining and Reclamation,LLC <br />