Laserfiche WebLink
• 3) The leachate discharged to the North Fork is assumed to completely mix <br />with the flow in the river according to the following equation: <br />Qnf+1•Ca1=Qnf*Cnf+Q1•Clm <br />where <br />Q of =The flow rate of the North (33.9 efs). <br />Q 1 =The flow rate of leachate (26 gpm). <br />Q of+I =The flow rate in the North Fork after leachate has entered <br />(15,240 gpm). <br />C al =The concentration in the North Fork which meets the in <br />stream standards (ISS) set by the Colorado Department of <br />Natural Resources (1984). <br />• Cnf =The quality of water in the North Fork upstream of the <br />refuse pile during low flow conditions. <br />C Im =The maximum allowable concentration in the leachate <br />that will meet the ISS after mixing with the ambient <br />flow in the Ilorth Fork. <br />It is estimated that the above assumptions incorporate a minimum factor of safety of <br />100, which is extremely conservative. <br />EXISTING WATER QUALITY OF THE NORTH FORT{ <br />The North Fork of the Gunnison is currently considered a Class [cold water aquatic <br />habitat and a Class II recreation stream. The water is used downstream for both <br />potable water supply and agricultural uses. In stream standards (ISS) which account <br />for these uses have been set for the North Fork by the Colorado Department of <br />Natural Resources (1984) and are listed in Table 1. In addition to the ISS, the C;t1LRD <br />• has stipulated that water quality in the North Fork be protected against salinity <br />increases such that the conductivity is less than 0.7 millimhos and the sodium <br />absorption ratios (SAR) of North Fork water be maintained below 3. <br />