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)
28
28
<1
<10
4.7
ND
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
28
0
74.5
25.4
44.6
13.6
40.45
Alkalinity, Carbonate (mg/I as CaCO3)
28
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
20
0
61.1
22
34.5
10.7
30.6
Aluminum, Dissolved (mg/I as Al)
26
9
0.466
<0.1
0.15
0.12
0.1115
Arsenic,Total Recoverable in Water as As mg/I
31
29
0.022
<0.005
0.003
0.004
<0.005
Cadmium, Dissolved (mg/I as Cd)
35
35
<0.0001
<0.005
0.0008
ND
<0.001
Calcium, Total (mg/I as Ca)
33
0
24
6.9
13.7
4.1
14.6
Chloride,Total in Water mg/I
34
7
14.5
<3
3.0
3.3
2.5
Chromium, Dissolved (mg/I as Cr)
23
22
0.003
<0.005
0.001
0.001
<0.001
Chromium,Total Recoverable in Water as Cr mg/I
14
11
0.03
<0.001
0.004
0.009
<0.001
Copper, Dissolved (mg/I as Cu)
35
33
0.015
<0.005
0.003
0.003
<0.005
Cyanide Free, mg/I
40
39
0.018
<0.05
0.010
0.009
<0.01
Cyanide, Total (mg/I as CN)
43
39
0.034
<0.05
0.007
0.007
<0.01
Flow, Rate Gallons /Min
39
0
1000
0
44.7
160.2
7.3
Fluoride, Total (mg/I as F)
35
1
1.78
<0.05
0.96
0.33
0.9
Hardness, Total (mg/I as CaCO3)
30
0
58.4
23.3
43.2
11.8
46.15
Iron, Dissolved (mg/I as Fe)
35
5
1.58
<0.05
0.17
0.26
0.108
Iron,Total Recoverable in Water as Fe mg/I
30
0
25
0.084
1.59
4.49
0.582
Lead, Dissolved (mg/I as Pb)
35
34
0.003
<0.005
0.001
0.001
<0.001
Magnesium, Total (mg/I as Mg)
32
0
4.5
1.29
2.53
0.75
2.515
Manganese, Dissolved (mg/I as Mn)
33
14
0.173
<0.05
0.038
0.033
0.014
Mercury, Total (mg/I as Hg)
33
31
0.0009
<0.0002
0.0001
0.0001
<0.0002
Nickel, Dissolved (mg/I as Ni)
35
35
<0.005
<0.02
0.003
ND
<0.005
Nitrate Nitrogen, Total (mg/I as N)
35
28
0.215
<0.05
0.046
0.048
<0.05
Nitrite Nitrogen, Total (mg/I as N)
30
30
<0.05
<0.05
0.025
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
18
11
0.215
<0.05
0.064
0.058
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
34
32
0.229
<0.2
0.05
0.04
<0.05
Oil and Grease Visual (No =0, Yes =1)
12
0
0
0
0
0
0
Oxygen, Dissolved mg/L
29
0
11.9
4.3
7.5
1.7
7.6
pH, Field, Standard Units
34
0
8.33
6.43
7.33
1.32
7.585
Potassium, Total mg/I as K)
30
1
7.9
<0.5
1.5
1.4
1.095
Selenium, Dissolved (mg/I as Se)
35
35
<0.005
<0.005
0.003
ND
<0.005
Silica, Total (mg/I as Si02)
1
0
7.6
7.6
7.6
ND
ND
Silver, Dissolved (mg/I as Ag)
34
33
0.0005
<0.001
0.0004
0.0001
<0.001
Sodium, Total (mg/I as Na)
30
0
13
3
8.2
2.1
9.0
Specific Conductance,Field (umhos /cm @ 25C)
35
0
1186
75.5
183
203
130.8
Strontium, Total (mg/I as Sr)
2
0
0.26
0.14
0.20
0.08
0.2
Sulfate, Total (mg/I as SO4)
41
10
160
<10
31.1
33.4
20
Temperature, Water (Degrees Centigrade)
35
0
24.1
0.1
10.3
7.0
8.9
Total Dissolved Solids, mg/I
35
0
186
33
98
35
94
Total Suspend Solids, mg /I
34
19
3800
<10
154
650
<7.5
Turbidity,Lab Nephelometric Turbidity Units, NTU
6
0
140
0.2
30
54
6.5
Weak Acid Dissociable Cyanide, mg /I
35
35
<0.005
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
35
30
0.014
<0.05
0.021
0.008
<0.05
TABLE 4 -1
SAMPLE LOCATION: T -1
DRAINAGE: NORTH FORK WILSON CREEK
PERIOD OF RECORD: 1986 -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 chromium was analyzed until 2001. Total recoverable chromium was analyzed in 1986 and from 2002. Both forms are provided to indicate the entire analytical history