2012-02-28_REVISION - M1980244 ‎(95)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 2/28/2012
• Doc Name: VOL. 2, Appendix 2: Hydrologic Evaluation Part 1
• From: CRIPPLE CREEK & VICTOR GOLD MINING COMPANY
• To: DRMS
• Type & Sequence: AM10
• Email Name: TC1
• Media Type: D
• Archive: No

PARAMETER
Number of
Analyses
Number of
Non - Detect
Analyses
Maximum
Value
Minimum
Value
Average
Value
Standard
Deviation
Median
Value
Acidity, Total (mg/I as CaCO3)
69
42
24
<10
7.3
5.2
<1
Alkalinity, Bicarbonate (mg/I as CaCO3)
58
0
164
151
157
3
157
Alkalinity, Carbonate (mg/I as CaCO3)
58
1
0
<10
0.1
0.7
0
Alkalinity, Total (mg/I as CaCO3)
53
0
160
120
129
6
129
Aluminum, Dissolved (mg/I as Al)
70
45
0.122
<0.1
0.03
0.02
<0.05
Arsenic, Dissolved (mg/I as As)
45
36
0.008
<0.005
0.003
0.002
<0.005
Arsenic,Total Recoverable in Water as As mg/I
28
21
0.009
<0.005
0.004
0.002
<0.005
Barium, Dissolved (mg/I as Ba)
7
7
<0.05
<0.05
0.025
ND
<0.05
Cadmium, Dissolved (mg/I as Cd)
72
70
0.0024
<0.005
0.001
0.0005
<0.001
Calcium, Total (mg/I as Ca)
71
0
49.7
20.3
42.2
3.9
42.1
Chloride,Total in Water mg/I
72
9
4
<3
2.2
0.5
2.25
Chromium, Dissolved (mg/I as Cr)
71
71
<0.001
<0.005
0.001
ND
<0.001
Copper, Dissolved (mg/I as Cu)
72
70
0.006
<0.005
0.0026
0.001
<0.005
Cyanide Free, mg/I
72
72
<0.01
<0.05
0.01
ND
<0.01
Cyanide, Total (mg/I as CN)
72
72
<0.005
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
72
0
2.7
1.7
2.1
0.1
2.06
Hardness, Total (mg/I as CaCO3)
70
0
171
71.9
151
12.8
150.5
Iron, Dissolved (mg/I as Fe)
72
0
6.84
0.01
0.74
0.74
0.657
Lead, Dissolved (mg/I as Pb)
72
72
<0.001
<0.005
0.001
ND
<0.001
Magnesium, Total (mg/I as Mg)
72
0
17
5.15
11.2
1.2
11
Manganese, Dissolved (mg/I as Mn)
72
2
0.268
<0.05
0.15
0.03
0.16
Mercury, Total (mg/I as Hg)
65
65
<0.0001
<0.0002
9.5E -05
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
72
72
<0.005
<0.05
0.00
ND
<0.005
Nitrate Nitrogen, Total (mg /I as N)
71
68
3.2
<0.05
0.1
0.4
<0.05
Nitrite Nitrogen, Total (mg/I as N)
69
69
<0.05
<0.05
0.025
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
30
26
1.64
<0.1
0.09
0.29
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
71
70
0.096
<0.2
0.04
0.03
<0.05
Oil and Grease Visual (No =0, Yes =1)
37
0
0
0
0
0
0
Oxygen, Dissolved mg/L
64
0
3.7
0
0.2
0.6
0.1
pH, Field, Standard Units
70
0
7.52
6.7
7.0
0.1
7.005
Potassium, Total mg/I as K)
71
0
5.48
1.16
2.14
0.51
2.07
Selenium, Dissolved (mg/I as Se)
72
72
<0.005
<0.005
0.0025
ND
<0.005
Silica, Total (mg/I as Si02)
3
0
18
17
17.3
0.6
17
Silver, Dissolved (mg/I as Ag)
72
71
0.001
<0.001
0.0004
0.0001
<0.001
Sodium, Total (mg/I as Na)
71
0
25.2
7.88
17.3
2.27
17.2
Specific Conductance,Field (umhos /cm @ 25C)
69
0
578
236
365
44
362
Strontium, Total (mg/I as Sr)
4
0
0.4
0.36
0.38
0.02
0.385
Sulfate, Total (mg /I as SO4)
71
0
80
38.7
54.8
7.2
53.3
Temperature, Water (Degrees Centigrade)
70
0
11.6
7.4
9.4
0.8
9.35
Total Dissolved Solids, mg/I
70
0
280
177
245
20
247
Total Suspend Solids, mg/I
70
68
8
<10
4.7
1.0
<10
Turbidity,Lab Nephelometric Turbidity Units, NTU
7
0
7.5
2.5
4.9
1.6
5
Water Level,Distance From Measuring Point (Feet)
73
0
7.52
3.45
5.25
1.03
5.4
Weak Acid Dissociable Cyanide, mg/I
72
72
<0.005
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
72
69
0.017
<0.05
0.02
0.01
<0.05
TABLE 4 -9
SAMPLE LOCATION: WCMW -6
DRAINAGE: WILSON CREEK
PERIOD OF RECORD: 1993 -2011
ND = Not determined Applicable in two cases' number of analyses = 1; or all analyses are non - detect
Non - detect analyses are set at 1/2 the detection limit for average and standard deviation calculations.
Median calculations use the laboratory analyses with less than detection values as negative.
Dissolved arsenic was analyzed from 1993 -1995 and since 2002 Total recoverable arsenic was analyzed from 1993 -2002. Both forms are provided to indicate the entire analytical history