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{Pest Elk dline <br />Table 66 Anal~•sis of vlixing Zone for MCC Discharge to ~iorth Fork Gunnison River <br />Flow in North Fork = 68 cfs on 9/14/2004 <br />MWPF Dischazge (017} = 0.89 cfs on 9(14f2004 <br />MWPF Discharge (017) = 2.0 cfs (maximum sustained dischazge rate) <br /> <br />Parameter <br />Units North Fork <br /> <br />Upper M\VPF <br /> <br />Discharge Mixed <br />~ <br />Value Max' <br />Mixed <br />Value'- North Fort: <br /> <br />Lower Suspect <br />; <br />Level Over <br />Suspect <br />Level? <br />Date 9114104 1113/04 91(4/04 9114104 <br />H SU 7.5 8.35 7.7 <br />Conductivity mmhoslcm ]31 4900 185 <br />oral Dissolved <br />Solids <br />mg£L <br />90 <br />3200 <br />130 <br />179 <br />130 <br />Specific <br />Conductance <br />mmhoslcm <br />0,131 <br />4.9 <br />0,19 <br />0.27 <br />0.185 <br />0.7 <br />no <br />Sodittm Absorption <br />Ratio <br />0.33 <br />78.2 <br />1.2 <br />2.4 <br />1.14 <br />3 <br />no <br />Boron` mglL 0.01 2.9 (T) 0.05 0.09 0.05 0.5 no <br />Chloride' mg'I. i 400 (T) 6 t2 4 250 no <br />Aluminum' mg/L 0.03 0.38 (T) 0.03 0.04 0.03 i no <br />epic°'' mg/L <0.0006 -- -- -- <0.0005 0.1 nos <br />Cadmitml`• s mgQ. < O.OOi -- - -- < 0.005 0,01 nos I <br />Copper`• s mgJL <0.01 - - - < 0.01 0.2 no` <br />Lead''s mg/L <0.0001 •- -- -- <0.0001 5 nos , <br />Manganese° mg/[. < 0.005 0.080 C17 0.006 0.007 < 0.005 0.2 no <br />Molybdentun`'s me~'L <0.01 - - - <0.01 O.l nos <br />ickel`•s mgr`L <0.01 - - -- <0.01 0~ nos <br />Selenium''s mg/1. <0.001 - -- - <0.001 0.02 nos <br />Zinc' mg/i. < 0.01 0.01 (T) 0.01 0.01 < 0.01 2 no <br />~ Mixed taue is the concentration in dte North Fork below Sylvester Gulch using the 9!14/04 Nanh Fork Upper flow <br />and water quality data and the htWPF 9114104 discharge rate with water quality values from 11/3%04. <br />2 Maximum mixed value is the same as the mixed value scenario except the discharge rate is increased to 2.0 cfs. <br />s Suspect Levels taken from Table 3 of" A description of the Material Damage Assessment Process Penaining to <br />Alluvial Valley Floors, Surface Water, Ground Water, and Subsidence at Local Mines" by the Department of <br />Natural Resources Mined land Reclama[ion Division da[ed January 1988. <br />' All parameters for dte North Fork Upper and Lower Stations aze in the dissolved form. Only total <br />concentrations were available for the dischazge water. These values w•ert used to obtain mixcd values and were <br />deemed to be conservatively hint. <br />s Metals that were not sampled far in the dischazge water are considered to be of very low concentrations based <br />on the downstream North Fork station not detecting any of the parameters at detection levels well below the <br />erne une _ er, me <br />