2012-02-28_REVISION - M1980244 ‎(96)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 2/28/2012
• Doc Name: VOL. 2, Appendix 2: Hydrologic Evaluation Part 2
• 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)
55
39
43
<10
12
7
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
57
8
166
<10
38
30
31.6
Alkalinity, Carbonate (mg/I as CaCO3)
57
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
34
8
136
<10
28
29
17.3
Aluminum, Dissolved (mg/I as Al)
47
3
9.65
<0.1
1.71
2.64
0.301
Arsenic,Total Recoverable in Water as As mg/I
61
59
0.018
<0.005
0.005
0.002
<0.005
Cadmium, Dissolved (mg/I as Cd)
62
40
0.011
<0.001
0.002
0.002
<0.001
Calcium, Total (mg/I as Ca)
62
0
303
16.7
109.8
68.0
82.3
Chloride,Total in Water mg/I
62
5
28.5
<5
5.8
4.9
5
Chromium,Total Recoverable in Water as Cr mg /I
23
21
0.002
<0.001
0.001
0.0002
<0.001
Copper, Dissolved (mg/I as Cu)
62
53
0.018
<0.05
0.006
0.006
<0.005
Cyanide Free, mg /I
62
62
<0.01
<0.05
0.013
ND
<0.01
Cyanide, Total (mg/I as CN)
62
60
0.071
<0.01
0.011
0.008
<0.01
Flow, Rate Gallons /Min
90
0
158
0
26
36
10.9
Fluoride, Total (mg /I as F)
62
0
19
0.729
4.81
4.02
2.84
Hardness, Total (mg/I as CaCO3)
62
0
1374
0
431
302
306
Iron, Dissolved (mg/I as Fe)
62
18
0.905
<0.05
0.130
0.159
0.069
Iron,Total Recoverable in Water as Fe mg/I
61
3
5.6
<0.05
0.484
0.809
0.254
Lead, Dissolved (mg/I as Pb)
62
58
0.002
<0.005
0.001
0.001
<0.001
Magnesium, Total (mg/I as Mg)
62
0
150
4.67
40.32
32.12
26.7
Manganese, Dissolved (mg/I as Mn)
59
0
42
0.123
6.15
8.15
2.76
Mercury, Total (mg/I as Hg)
62
60
0.0002
<0.0002
0.00019
2.7E -05
<0.0002
Nickel, Dissolved (mg/I as Ni)
62
12
0.4
<0.005
0.035
0.067
0.011
Nitrate Nitrogen, Total (mg/I as N)
62
33
2.5
<0.05
0.254
0.495
<0.05
Nitrite Nitrogen, Total (mg/I as N)
62
62
<0.05
<0.05
0.050
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
37
18
2.5
<0.05
0.267
0.495
0.051
Nitrogen, Ammonia, Total (mg/I as N)
62
56
0.4
<0.2
0.1
0.1
<0.05
Oil and Grease Visual (No =0, Yes =1)
33
0
0
0
0
0
0
Oxidation Reduction Potential (mv)
1
0
105.3
105.3
105.3
ND
ND
Oxygen, Dissolved mg/L
58
0
11.9
0.6
6.4
2.5
6.45
pH, Field, Standard Units
61
0
7.63
4.13
6.56
0.64
6.65
Phosphorus, dissolved (mg/I)
1
1
<0.01
<0.01
0.01
ND
ND
Potassium, Total mg/I as K)
55
0
14.7
1.03
4.42
2.75
3.89
Selenium, Dissolved (mg /I as Se)
62
60
0.007
<0.005
0.0050
0.0003
<0.005
Silver, Dissolved (mg/I as Ag)
62
58
0.002
<0.005
0.0010
0.0005
<0.001
Sodium, Total (mg/I as Na)
55
0
518
5.55
62.4
95.6
20.9
Specific Conductance,Field (umhos /cm @ 25C)
61
0
3510
102
988
728
690
Sulfate, Total (mg/I as SO4)
62
0
2462
54.9
527.8
487.1
322
Temperature, Water (Degrees Centigrade)
61
0
22.9
0.1
10.5
6.3
11.3
Total Dissolved Solids, mg /I
61
0
3400
123
833
701
507
Total Suspend Solids, mg/I
62
48
180
<10
15
23
<10
Weak Acid Dissociable Cyanide, mg /I
62
62
<0.005
<0.01
0.010
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
62
18
8.09
<0.05
0.611
1.232
0.117
TABLE 6 -2
SAMPLE LOCATION: GV-02
DRAINAGE: GRASSY VALLEY
PERIOD OF RECORD: 1996 -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.