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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 3, Permit Number COG-500217 <br />A. Industry Description (Continued) <br />settling pond; washwater from the processing system to 6e routed <br />through ponds and settled; local berms and ditches are used to <br />isolate the operation from surface waters. <br />There is storage of diesel fuel or gasoline solvents on site, as 1 <br />indicated in figure 2 of Che permit. l <br />B. Wastewater Treatment Description <br />Sedimentation ponds are used for treatment of the sources to be <br />discharged. These three ponds are shown in figure 2 of the permit. <br />The settling ponds have been designed for containment up to the <br />10-year, 24-hour stormwater event (respectively for 5.1 acre-feet <br />storage associated with discharge point 001 and 1.0 acre-feet <br />storage associated with discharge point 002). The location of the <br />two discharge points is also shown in figure 2 of the permit. <br />V. TERMS AND CONDITIONS OF THE PERMIT: <br />The permitee is encouraged to read the general rationale and updates for <br />an understanding of how this permit was developed. The permittee should <br />also read the permit to see what requirements exist. In the permit, <br />effluent limitations and monitoring/reporting requirements are specified <br />in Parts I.B, and I.C; special notification requirements for effluent <br />violations are addressed in Part II.A. Salinity (TDS) monitoring of the <br />discharges will be required, since the receiving waters eventually go to <br />the Lower Colorado River Basin. Phosphorus monitoring of [he <br />discharge(s) is not required. <br />This general permit expires on September 30, 1992; therefore, Telluride <br />Gravel should be aware that another application will need [o be <br />submitted in the very near future. <br />Although there is fuel storage in the project area, a Materials <br />Containment Plan will not be required. However, diking should be <br />performed as discussed in page S of the previous general rationale and <br />in Part I.B.7 of the permit. <br />Based on the above information, the Telluride Gravel, Inc. facility is <br />certified to discharge under the general permit for sand and gravel <br />operations, identified as permit number COG-500000. All correspondence <br />relative to this facility should reference the specific facility number, <br />COG-500217. <br />Don Holmer <br />December 9. 1991 <br />