HYDRO20748

• Permit No: C1980007
• IBM Index Class Name: Hydrology
• Doc Date: 4/1/2001
• Doc Name: NPDES BIOMONITORING WF of SG 017
• Permit Index Doc Type: DMR’s
• Media Type: D
• Archive: No

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ABSTRACT
Commercial Testing and Engineering, Co. (CT&•E) conducted a two species acute bioassay on
the West Fork of Sylvester Gulch effluent discharge. This discharge has been designated as
outfall 017. The purpose of this bioassay was to determine if the facility complies with the WET
portion of the Colorado State Permit System Authorization to Discharge. The test organisms
utilized were the fathead minnow (Pimephales prome/as) and the daphnid (Daphnia magna).
`~ Test results indicate that the effluent was not acutely toxic to either species. Therefore,
Mountain Coal Company outfafl O17 effluent is In compliance with the acute WET portion of its
-. Colorado State Discharge Permit for the second quarter of 2001.

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