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State Reg. _. <br /> <br />In compliance with the Federal Water Pollution Control Act, the <br />Seneca Il Mine has obtained six (6) NPDES discharge permits <br />(Nos. CO /f0000221-001 through 003 and only Permit No. 002-3) governs <br />and monitors the discharge points for total suspended solids, flow, pH, <br />and magnesium. Any noncompliances are reported to the Colorado <br />Department of Health. <br />To meet the requirements of the Safe Water Drinking Act, Seneca per- <br />sonnel at the Seneca II Mine monitor the shop water monthly for coliform <br />bacteria (if the coliform count exceeds 40 coliform bacteria/100 milli- <br />liters, rechecks are made), turbidity, and meets the inorganic substance <br />monitoring requirements found in 141.23 of the Act. Since chlorine is <br />not used in treatment, chlorine residual is not monitored. The Seneca II <br />Mine, through the use of sediment ponds, meets permit requirements of <br />Colorado's Department of Natural Resources. Design, construction, and <br />maintenance of impoundments also meet the requirements of the Federal <br />Watershed Protectin and Flood Protection Act. <br />EROSION AND SEDIMENT CONTROL PLAN <br />Seneca 11 Mine's erosion and sediment control plan, like the water re- <br />source management plan, is composed of several mitigating measures <br />which will be conducted within the permit area. Again, to simplify, a <br />conceptual systems approach has been taken. The flow chart <br />(Figure 14-2) for the erosion and sediment control plan delineates the <br />processes of erosion and sedimentation and cross-references the section <br />of the permit which describes Seneca's plans to study and control erosion <br />and sedimentation. The following is a detailed description and interpre- <br />tation of the erosion and sediment control pion flow chart. <br />A. DESCRIPTION. This flow chort is very similar to the water man- <br />agement flow chart. It consists of boxes, circles, Lines with arrows, and <br />dotted lines. Boxes represent various processes (causes and effects) in <br />the total erosion and sedimentation process. Circles connected to spe- <br />cific boxes cross-reference where in the permit plan to study and/or <br />control the cause or effect can be located. Lines with arrows denote the <br />14-17 <br />Revised 5-27-81 <br />