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)
5
2
24
<10
11
8
10
Alkalinity, Bicarbonate (mg/I as CaCO3)
5
0
74.9
35
45.4
16.6
38.4
Alkalinity, Total (mg/I as CaCO3)
5
0
61.4
28.7
37.2
13.6
31.5
Aluminum, Dissolved (mg/I as Al)
2
0
0.674
0.083
0.379
0.418
0.3785
Arsenic, Dissolved (mg/I as As)
2
2
<0.005
<0.005
0.0025
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
3
3
<0.005
<0.005
0.0025
ND
<0.005
Cadmium, Dissolved (mg/I as Cd)
5
5
<0.001
<0.001
0.0005
ND
<0.001
Calcium, Total (mg/I as Ca)
5
0
31.7
15.2
22.6
6.0
21.5
Chloride,Total in Water mg/I
5
0
13
6.25
8.8
3.2
6.75
Chromium, Dissolved (mg/I as Cr)
2
2
<0.001
<0.001
0.0005
ND
<0.001
Chromium,Total Recoverable in Water as Cr mg /I
3
0
0.003
0.002
0.003
0.001
0.003
Copper, Dissolved (mg/I as Cu)
5
4
0.042
<0.005
0.010
0.018
<0.005
Cyanide Free, mg/I
5
5
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
5
5
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
5
0
1.03
0.397
0.64
0.25
0.642
Hardness, Total (mg /I as CaCO3)
5
0
108
58.8
80
19
78.2
Iron, Dissolved (mg/I as Fe)
5
2
0.396
<0.05
0.121
0.156
0.077
Iron,Total Recoverable in Water as Fe mg/I
3
0
2.17
0.87
1.60
0.67
1.77
Lead, Dissolved (mg/I as Pb)
5
4
0.002
<0.001
0.001
0.001
<0.001
Magnesium, Total (mg/I as Mg)
5
0
6.9
4.25
5.64
1.01
5.95
Manganese, Dissolved (mg/I as Mn)
5
1
0.086
<0.01
0.028
0.033
0.02
Mercury, Total (mg/I as Hg)
5
4
0.0016
<0.0002
0.0004
0.0007
<0.0002
Nickel, Dissolved (mg/I as Ni)
5
4
0.007
<0.005
0.003
0.002
<0.005
Nitrate Nitrogen, Total (mg/I as N)
5
0
1.36
0.7
1.15
0.27
1.2
Nitrite Nitrogen, Total (mg/I as N)
5
5
<0.05
<0.05
0.025
ND
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
5
5
<0.05
<0.05
0.025
ND
<0.05
Oxygen, Dissolved mg/L
6
0
6.6
0.3
3.4
2.3
3.35
pH, Field, Standard Units
6
0
6.32
6.02
6.19
0.12
6.19
Potassium, Total mg/I as K)
5
0
3.96
2.1
3.13
0.67
3.23
Selenium, Dissolved (mg/I as Se)
5
5
<0.005
<0.005
0.0025
ND
<0.005
Silver, Dissolved (mg/I as Ag)
5
5
<0.001
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
5
0
26.3
18
21.5
3.2
21.4
Specific Conductance,Field (umhos /cm @ 25C)
6
0
325
202
283
46
299.5
Sulfate, Total (mg/I as SO4)
5
0
101
64.8
80
14
78.5
Temperature, Water (Degrees Centigrade)
6
0
8.3
53
7.1
1.1
7.15
Total Dissolved Solids, mg/I
5
0
720
195
315
227
213
Total Suspend Solids, mg/I
5
0
5450
11
1180
2389
103
Water Level,Distance From Measuring Point (Feet)
8
0
24.42
9.83
16.88
5.71
18.22
Weak Acid Dissociable Cyanide, mg/I
5
5
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
5
5
<0.05
<0.05
0.025
ND
<0.05
TABLE 6-10
SAMPLE LOCATION: GVPZ -2
DRAINAGE: GRASSY VALLEY
PERIOD OF RECORD: 2001 -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 2008 Total recoverable arsenic was analyzed through 2007 Both forms are provided to indicate the entire analytical history.