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)
4
2
28
<10
16
12
7
Alkalinity, Bicarbonate (mg/I as CaCO3)
4
0
134
99.8
115
14
113
Alkalinity, Carbonate (mg/I as CaCO3)
4
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
4
0
110
81.8
94
12
92.5
Aluminum, Dissolved (mg/I as Al)
4
0
0.054
0.024
0.04
0.01
0.0325
Arsenic, Dissolved (mg/I as As)
4
4
<0.005
<0.005
0.0025
ND
<0.005
Cadmium, Dissolved (mg/I as Cd)
4
4
<0.001
<0.001
0.0005
ND
<0.001
Calcium, Total (mg /I as Ca)
4
0
37.8
33
36.0
2.2
36.6
Chloride,Total in Water mg/I
4
0
7.5
5.43
6.42
0.85
6.375
Chromium, Dissolved (mg/I as Cr)
4
4
<0.001
<0.001
0.0005
ND
<0.001
Copper, Dissolved (mg/I as Cu)
4
4
<0.005
<0.005
0.0025
ND
<0.005
Cyanide Free, mg/I
4
4
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
4
4
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg /I as F)
4
0
0.427
0.41
0.42
0.01
0.424
Hardness, Total (mg/I as CaCO3)
4
0
140
123
134
8
136
Iron, Dissolved (mg/I as Fe)
4
3
0.118
<0.05
0.05
0.05
<0.05
Lead, Dissolved (mg/I as Pb)
4
4
<0.001
<0.001
0.0005
ND
<0.001
Magnesium, Total (mg /I as Mg)
4
0
11.9
9.67
10.58
1.08
10.365
Manganese, Dissolved (mg/I as Mn)
4
0
0.384
0.215
0.27
0.08
0.236
Mercury, Total (mg/I as Hg)
4
4
<0.0002
<0.0002
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
4
3
0.006
<0.005
0.003
0.002
<0.005
Nitrate Nitrogen, Total (mg/I as N)
4
0
0.419
0.12
0.20
0.15
0.1335
Nitrite Nitrogen, Total (mg/I as N)
4
4
<0.05
<0.05
0.025
ND
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
4
4
<0.05
<0.05
0.025
ND
<0.05
Oil and Grease Visual (No =0, Yes =1)
6
0
0
0
0
0
0
Oxygen, Dissolved mg /L
4
0
2.6
1
1.6
0.7
1.4
pH, Field, Standard Units
4
0
7.17
6.31
6.65
0.37
6.56
Potassium, Total mg/I as K)
4
0
3.36
2.15
2.56
0.56
2.355
Selenium, Dissolved (mg/I as Se)
4
4
<0.005
<0.005
0.0025
ND
<0.005
Silver, Dissolved (mg/I as Ag)
4
4
<0.001
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
4
0
28
16.1
23.3
5.1
24.5
Specific Conductance,Field (umhos /cm @ 25C)
4
0
374
87.3
297
140
363
Sulfate, Total (mg/I as SO4)
4
0
101
56.1
77.9
18.4
77.3
Temperature, Water (Degrees Centigrade)
4
0
8.7
6.8
7.48
0.87
7.2
Total Dissolved Solids, mg/I
4
0
232
210
218
10
214.5
Total Suspend Solids, mg/I
4
1
32
<10
17
11
16
Water Level,Distance From Measuring Point (Feet)
7
0
5.4
3.98
4.73
0.48
4.7
Weak Acid Dissociable Cyanide, mg /I
4
4
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
4
4
<0.05
<0.05
0.025
ND
<0.05
TABLE 6 -28
SAMPLE LOCATION: GVMW -22B
DRAINAGE: GRASSY VALLEY
PERIOD OF RECORD: 2007 -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.