Laserfiche WebLink
Nonetheless, to avoid recurrence of these exceedances, MCC contacted the Division and <br />obtained agreement to proceed with replacing the polishing pond with an enclosed basin. MCC <br />completed the installation of the buried tank and it was put into operation on October 8`h. A <br />recent analysis of the water- discharging from Outfall 007 showed TSS and fecal eoliform levels <br />well within discharge limits. MCC will continue to monitor per the requirements of the permit to <br />verify the effectiveness of the action taken to remedy these exceedances. <br />Outfall 015 <br />A small volume of water (i.e. 190,000 gallons) was discharged on July 18t11 to augment water <br />flows in the North Fork of the Gunnison River during the summer drought. Results of the <br />analysis of that discharge were in compliance with daily limits, but revealed a 30 -day average <br />exceedance for total iron and TSS, both of which have not been an issue with this pond. <br />Typically, water in the pond associated with Outfall 015 is only discharged during wet <br />conditions (e.g., storm events or snow melt). The water discharged on July 18th had been sitting <br />in the pond for several weeks and MCC suspects that iron concentrated as a result of <br />evaporation. Although both total iron and TSS were below the daily limits for this outfall, <br />because there was no more water in the pond to discharge during that month, those iron and TSS <br />values for that single -day, small discharge also became the 30 -day average values. Under <br />normal discharge conditions, MCC would have been able to collect additional discharge samples <br />to meet the 30 -day average limits. Should a similar situation arise in the future, MCC will <br />collect a pre- discharge sample to better ensure the pond is within permitted limits prior to <br />discharge. <br />Should you require additional information or have any questions concerning these DMRs, please <br />contact me at (970) 929-2238. <br />Sincerely, <br />9 <br />T <br />Kathleen G. Welt <br />Environmental Engineer III <br />Enclosures: CDPS Forms (DMRs) Third Quarter 2012. <br />cc: W. Norris <br />J. Stark - CDRMS <br />Availability of Records File - DMRs <br />