2009-03-06_PERMIT FILE - C1981012A ‎(6)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 3/6/2009
• Section_Exhibit Name: Exhibit 22 NPDES Permit
• Media Type: D
• Archive: Yes

CO-0000906
New Elk Mine Water Quality Assessment
Table A-6a
Chronic Assimilative Capacities for Metals for Outfall 001
Tier 1 - 2500 m 3.6 m d, 5.6 cfs
` M3 Mi. Notes
Q (?JS? Q3 ?g?? M 1
9
Parameter VI (cfs) z . _. I'll 1
0
100 177 1
As, TR (µg/1) 4.3 5.6 9.9 0 55
0 0.97 1
Cd, Dis (µg/1) 4.3 5.6 9.9 .
12 20 1
Cu, Dis (µg/1) 4.3 5.6 9.9 l.8
84 1000 1,703 1
Fe, TR (µg/1) 4.3 5.6 9.9 0 3.7 6.5 1
Pb, Dis (4911) 4.3 5.6 9.9
27
1854
3,257 1

5.6
Mn, Dis (µg/1) 4.3
9.9
0
010
0
0.018 2
4.3 5.6
Hg, To (99/1) 9.9
0 .
70 124 2
Ni, Dis (49/1) 4.3 5.6 9.9 2
2 4
6 6.4 1
Se, Dis (µ9/1) 4.3 5.6 9.9 .
0 .
14
0
0.25 2
Ag, Dis (µ9/1) 4.3 5.6 9.9 0 .
168 297 1
Zn, Dis (µg/1) 4.3 5.6 9.9
028
0
0.75
1.30
B, Tot (mg/1) 4.3 5.6
9,9
.
2
2
11.2
18 1

.
9.9
Se, Dis (Temp Std) (4g/1) 4.3 5.6
l recoverable or dissolved form.
t
i
"total data, however, were available
a
n to
Note 1: No ambient background data were available
and were therefore used to represent the background concentration.
and Ag.
Ni
Cr
H
f
However,
the findings
of comparable studies suggest that
,
,
g,
or
Note 2: No current data were available
t less than detection levels in-strea
d
f m are dele ted as pollutants of concern for a water body and
a
oun
pollutants consistently
in-stream sampling is performed. T
h hus, it has been assume d that Cr, Hg, Ni, and Ag have been
en
are no longer analyzed w
eliminated as pollutants of concern in the receiving stream. Based on this assumption, a background concentration of zero was
used for Cr, Hg, Ni, and Ag.
Table A-6b
Acute Assimilative Capacities for Metals for Outfall 001
Tier 1 - 2500 gpm (3.6 mgd, 5.6 cfs)
E
Page 14 of 29 Last Revised August 26, 2008
Appendix A (wQA version s-a(FABI.))