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
Standard
Deviation
Median
Value
Acidity, Total (mg/I as CaCO3)
32
20
18
<20
8
5
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
31
0
81.2
15
65.7
10.6
65.8
Alkalinity, Carbonate (mg/I as CaCO3)
31
0
15.8
0
1
3
0
Alkalinity, Total (mg/I as CaCO3)
19
0
66.6
38.6
55.7
6.2
54
Aluminum, Dissolved (mg/I as Al)
33
27
0.312
<0.1
0.04
0.06
<0.05
Arsenic, Dissolved (mg/I as As)
7
7
<0.005
<0.005
0.0025
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
27
27
<0.005
<0.005
0.0025
ND
<0.005
Barium, Total (mg/I as Ba)
1
0
0.11
0.11
0.11
ND
ND
Beryllium, Total (mg/I as Be)
1
1
<0.001
<0.001
0.0005
ND
ND
Boron, Total (mg/I as B)
1
0
0.077
0.077
0.077
ND
ND
Cadmium, Dissolved (mg/I as Cd)
33
33
<0.0001
<0.001
0.0005
ND
<0.001
Calcium, Total (mg/I as Ca)
33
0
17
10.1
12.7
1.9
12.1
Chloride,Total in Water mg/I
33
4
5
<1
1
1
0.5
Chromium, Dissolved (mg/I as Cr)
32
31
0.002
<0.005
0.001
0.001
<0.001
Copper, Dissolved (mg/I as Cu)
33
31
0.019
<0.005
0.003
0.003
<0.005
Cyanide Free, mg/I
33
33
<0.01
<0.05
0.01
ND
<0.01
Cyanide, Total (mg /I as CN)
33
33
<0.005
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
33
2
0.261
<0.5
0.20
0.02
0.194
Hardness, Total (mg/I as CaCO3)
33
0
67.6
38.3
58.7
5.7
57.9
Iron, Dissolved (mg /I as Fe)
32
2
8.71
<0.05
5.13
2.05
5.07
Lead, Dissolved (mg/I as Pb)
33
32
0.002
<0.005
0.001
0.001
<0.001
Magnesium, Total (mg/I as Mg)
33
0
8.25
3.12
6.52
0.95
6.5
Manganese, Dissolved (mg/I as Mn)
32
1
1.94
<0.01
1.15
0.35
1.13
Mercury, Total (mg/I as Hg)
33
33
<0.0001
<0.001
0.0001
ND
<0.0002
Nickel, Dissolved (mg /I as Ni)
33
33
<0.005
<0.01
0.003
ND
<0.005
Nitrate Nitrogen, Total (mg/I as N)
33
31
2.31
<0.05
0.10
0.40
<0.05
Nitrite Nitrogen, Total (mg/I as N)
33
33
<0.05
<0.05
0.03
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
26
24
2.31
<0.05
0.12
0.45
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
33
33
<0.05
<0.2
0.03
ND
<0.05
Oil and Grease Visual (No =0, Yes =1)
8
0
0
0
0
0
0
Oxygen, Dissolved mg/L
31
0
5.7
0.1
1.2
1.4
0.7
pH, Field, Standard Units
35
0
11.72
5.96
6.97
0.99
6.78
Potassium, Total mg/I as K)
32
1
3.26
<0.5
1.16
0.65
0.955
Selenium, Dissolved (mg/I as Se)
33
33
<0.005
<0.005
0.0025
ND
<0.005
Silica, Total (mg/I as Si02)
1
0
15.1
15.1
15.1
ND
ND
Silver, Dissolved (mg/I as Ag)
32
32
<0.0005
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
32
0
9.95
6.03
6.98
0.68
6.93
Specific Conductance,Field (umhos /cm @ 25C)
33
0
1545
36.1
220
246
171.5
Sulfate, Total (mg/I as 504)
33
1
31.7
<10
22
5
22.9
Temperature, Water (Degrees Centigrade)
35
0
11.8
4
6.0
1.4
5.9
Total Dissolved Solids, mg/I
33
0
131
73
104
20
110
Total Suspend Solids, mg/I
34
11
193
<10
25
41
12.5
Water Level,Distance From Measuring Point (Feet)
73
0
29.87
15.32
23.77
3.36
24.33
Weak Acid Dissociable Cyanide, mg/I
33
33
<0.005
<0.01
0 005
ND
<0.01
Zinc, Dissolved (mg /I as Zn)
33
30
0.107
<0.05
0.03
0.02
<0.05
TABLE 6 -13
SAMPLE LOCATION: GVMW -4A
DRAINAGE: GRASSY VALLEY
PERIOD OF RECORD: 1997 -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 2002. Total recoverable arsenic was analyzed through 2004. Both forms are'provided to indicate the entire analytical history.