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L~~ COMMEROIALTESTING & ENGINEERINGCO. <br />ABSTRACT <br />Commercial Testing and Engineering, Co. (CT&E) conducted a two species acute bioassay on <br />the West Fork of Sylvester Gulch effluent dischazge. This discharge has been designated as <br />outfall 017. The purpose of this bioassay was to determine if the facility complies with the WET <br />portion of the Colorado State Permit System Authorization to Discharge. The test organisms <br />utilized were the fathead minnow (Pimephales promelas) and the daphnid (Daphnia magna). <br />Test results indicate that the effluent was not acutely toxic to either species. Therefore, <br />Mountain Coal Company, outfall 017 effluent, is in compliance with the acute WET portion of <br />its Colorado State Discharge Permit for the first quarter of 2003. <br />F.SJf. <br />