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Proposed Assessment CV-2005-006 NOV CV-2005-006 contains four citations. Based on the correspondence I have summarized each part below. Part 1 was issued for failure to appropriately design a small azea exemption at the NW Mains ventilation shaft. The approved design had not been field verified and dischazge flow was circumventing the SAE rock dam and approved grass filter. Water was dischazging through another grassed azea. No flow from the SAE was documented going into Fish Creek. TCC has requested that this part of the NOV be vacated. Part 2 was issued because TCC was pumping water from Fish Creek using a temporary portable pump. The pumping was not included in the description of operations. TCC has requested that this part of the NOV be vacated also. Part 3 was issued because underground mine water was dischazging onto the land surface from the NW Mains ventilation fan facility. Dischazge from this fan site had not been considered in the permit application. According to correspondence from TCC there was a malfunction in the pressure relief valves of the underground mine water system. Underground mine water was shut off which caused the water pressure to build up to the point that water dischazged from the pressure relief pipe that surfaces at the NW Mains ventilation fan. This was a system malfunction and the surface water dischazge was not anticipated. TCC immediately took the necessary actions to prevent further discharge. They aze working with the system manufacturer to determine the source of the malfunction and to develop an alternate system to prevent this from occurring again. Part 4 was issued for failure to demonstrate that the underground mine water was in compliance with the effluent limitations of Rule 4.05.2 (NPDES standazds) prior to dischazge at the surface. As stated above, TCC did not anticipate the dischazge. The water that dischazged was treated clean mine water that is used for mine equipment cooling and dust control. TCC did collect a grab sample of the water and had it analyzed for the full suite water quality parameters. The water was in compliance with water quality standazds. Based on the above the following assessment is proposed. History No NOV's have been issued within the past twelve months. $250.00 is proposed for fault.