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)
117
23
90
<6
22
16
22
Alkalinity, Bicarbonate (mg/I as CaCO3)
86
0
120
19.5
66
27
63.2
Alkalinity, Carbonate (mg/I as CaCO3)
85
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
74
0
100
26
64
19
65.5
Aluminum, Dissolved (mg/I as Al)
120
2
5.07
<0.1
1.33
1.06
1.065
Arsenic, Dissolved (mg/I as As)
61
61
<0.005
<0.005
0.0025
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
59
57
0.02
<0.005
0.003
0.002
<0.005
Cadmium, Dissolved (mg/I as Cd)
119
93
0.0022
<0.01
0.001
0.001
<0.001
Calcium, Total (mg/I as Ca)
116
0
550
135
256
78
241
Chloride,Total in Water mg/I
118
0
606
8
95
128
43.5
Chromium, Dissolved (mg/I as Cr)
119
97
0.013
<0.005
0.001
0.002
<0.001
Copper, Dissolved (mg/I as Cu)
118
96
0.01
<0.005
0.003
0.002
<0.005
Cyanide Free, mg/I
119
119
<0.01
<0.05
0.01
ND
<0.01
Cyanide, Total (mg/I as CN)
119
0
0.323
0.011
0.055
0.046
0.044
Fluoride, Total (mg/I as F)
119
0
12.2
3.07
5.7
2.0
5.28
Hardness, Total (mg/I as CaCO3)
118
0
1880
420
846
271
811.5
Iron, Dissolved (mg/I as Fe)
118
78
0.12
<0.5
0.03
0.03
<0.05
Lead, Dissolved (mg/I as Pb)
119
117
0.001
<0.005
0.001
0.001
<0.001
Magnesium, Total (mg/I as Mg)
116
0
123
21
50
20
46
Manganese, Dissolved (mg/I as Mn)
120
37
2.06
<0.1
0.31
0.42
0.163
Mercury, Total (mg/I as Hg)
99
96
0.0013
<0.0002
0.0001
0.0001
<0.0002
Nickel, Dissolved (mg/I as Ni)
119
50
0.024
<0.05
0.009
0.006
0.007
Nitrate Nitrogen, Total (mg/I as N)
119
0
24.1
0.23
9.38
5.01
10.6
Nitrite Nitrogen, Total (mg/I as N)
118
116
0.08
<0.05
0.03
0.01
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
75
0
24.1
0.23
9.4
5.8
11
Nitrogen, Ammonia, Total (mg/I as N)
119
118
0.066
<0.5
0.047
0.038
<0.05
Oil and Grease Visual (No =0, Yes =1)
37
0
0
0
0
0
0
Oxidation Reduction Potential (my)
21
0
299
143.9
210
45
220
Oxygen, Dissolved mg/L
99
0
14.82
0.2
3.1
2.5
2.4
pH, Field, Standard Units
123
0
6.88
5.25
6.26
0.20
6.24
Potassium, Total mg/I as K)
116
0
21
5.23
11.3
3.6
10.1
Selenium, Dissolved (mg/I as Se)
117
103
0.012
<0.05
0.005
0.005
<0.005
Silica, Total (mg/I as Si02)
16
0
12
8.7
10
1.0
10
Silver, Dissolved (mg/I as Ag)
119
119
<0.0001
<0.005
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
116
0
130
21
65
24
65.45
Specific Conductance,Field (umhos /cm @ 25C)
120
0
3480
777
1672
515
1618.5
Strontium, Total (mg/I as Sr)
18
0
7.4
3.4
5.6
1.2
5.6
Sulfate, Total (mg/I as SO4)
119
0
1260
424
764
182
742
Temperature, Water (Degrees Centigrade)
124
0
14.8
3.9
8.8
2.6
8.7
Total Dissolved Solids, mg/I
117
0
2680
700
1387
393
1326
Total Suspend Solids, mg/I
118
97
70
<10
7
8
<10
Turbidity,Lab Nephelometric Turbidity Units, NTU
19
0
87
0.2
8
20
2.5
Water Level,Distance From Measuring Point (Feet)
120
0
35
10.3
23.0
6.2
25.165
Weak Acid Dissociable Cyanide, mg /I
119
87
0.088
<0.01
0.01
0 01
<0 01
Zinc, Dissolved (mg /I as Zn)
120
40
0.313
<0.1
0.07
0.06
0.05
TABLE 5 -16
SAMPLE LOCATION: CRMW -3A
DRAINAGE: AREQUA GULCH
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