2015-11-26_PERMIT FILE - C1981012A ‎(2)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 11/26/2015
• Section_Exhibit Name: Figures
• Media Type: D
• Archive: Yes

Table 26B - Projections of the Flooded Workings
Water Quality following Recycling of
Thickener Water for Key Constituents
'Maximum values developed from a comparison of the 4/94 addition to Exhibit 8 and from the sample acquired 5/4/94.
'Thickener values acquired from 12/30/94 sample. Water quality in flooded workings will look like thickener in year 4.
'Binary mixing assuming 36.6% from mine inflow and 63.3% from the thickener (2.43 x 10 gal. thickener /6.63 x 101 gal. in mine)
at Year 1.
°Binary mixing assuming 14% from mine inflow and 86% (7.29 x 108 gal. thickener /8.98 x 108 gal. mine water volume) from the
thickener at Year 3.
'Binary Mixing assuming flooding to the elevation of the East Portal and subsequent discharge reflecting thickener water quality.
f-�3 tM'e- 21
(Revised 2/6/95)
Flooded
Workings
Thickener'
Year 13
Year 34
At Discharge 5
MDNE (Maxy
pH (S.U)
8.4
8.2
8.3
8.2
8.2
-IDS (mg/1)
1412
510
839
636
510
EC (umhos/cm)
1729
900
1203
1016
900
Chloride
8
72
49
63
72
Iron
0.89
< 0.05
0.36
0.17
< 0.05
(total recoverablexmg/1)
Iron (dissolved) (mg/1)
< 0.02
0.03
<0.03
0.03
0.03
Manganese
0.04
<0.01
<0.02
<0.01
<0.01
(total recoverable)
(mg/1)
Manganese (dissolved)
0.01
<0.01
<0.01
<0.01
<0.01
(mg/1)
Molybdenum (mg/1)
0.02
NA
0.11
0.12
NA
Nickel (mg/1)
<0.02
0.01
< 0.01
0.01
0.01
Nitrate as N
0.02
0.38
0.25
0.33
0.38
SAR
40.49
11.15
21.88
15.25
11.15
Selenium
0.001
0.007
0.005
0.006
0.007
Sulfate (mg/1)
17
130
88.5
114
130
'Maximum values developed from a comparison of the 4/94 addition to Exhibit 8 and from the sample acquired 5/4/94.
'Thickener values acquired from 12/30/94 sample. Water quality in flooded workings will look like thickener in year 4.
'Binary mixing assuming 36.6% from mine inflow and 63.3% from the thickener (2.43 x 10 gal. thickener /6.63 x 101 gal. in mine)
at Year 1.
°Binary mixing assuming 14% from mine inflow and 86% (7.29 x 108 gal. thickener /8.98 x 108 gal. mine water volume) from the
thickener at Year 3.
'Binary Mixing assuming flooding to the elevation of the East Portal and subsequent discharge reflecting thickener water quality.
f-�3 tM'e- 21
(Revised 2/6/95)