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)
59
53
10
<20
5
2
<10
Alkalinity, Bicarbonate (mg /I as CaCO3)
59
0
80.7
0
66.4
9.9
67.8
Alkalinity, Carbonate (mg/I as CaCO3)
59
0
13.2
0
0.2
1.7
0
Alkalinity, Hydroxide (mg/I as CaCO3)
1
0
11.6
11.6
11.6
ND
ND
Alkalinity, Total (mg/I as CaCO3)
41
0
59.1
45.9
54.8
2.9
55.4
Aluminum, Dissolved (mg/I as Al)
59
31
0.18
<0.05
0.03
0.03
<0.01
Arsenic, Dissolved (mg/I as As)
39
39
<0.005
<0.005
0.0025
ND
<0.005
Cadmium, Dissolved (mg /I as Cd)
59
59
<0.001
<0.001
0.0005
ND
<0.001
Calcium, Total (mg/I as Ca)
59
0
41.4
24.8
33.7
3.1
33.6
Chloride,Total in Water mg/I
59
0
14.3
2
7.1
3.4
7
Chromium, Dissolved (mg/I as Cr)
59
55
0.003
<0.001
0.0006
0.0003
<0.001
Copper, Dissolved (mg/I as Cu)
59
58
0.006
<0.005
0.0026
0.0005
<0.005
Cyanide Free, mg/I
59
59
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
59
59
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
59
0
3.33
2.01
2.75
0.22
2.75
Hardness, Total (mg/I as CaCO3)
59
0
161.8637
88.7
103
11
102
Iron, Dissolved (mg/I as Fe)
59
55
0.08
<0.05
0.03
0.01
<0.05
Lead, Dissolved (mg/I as Pb)
59
58
0.001
<0.001
0.0005
0.0001
<0.001
Magnesium, Total (mg/I as Mg)
59
0
6.5
1.13
4.35
0.62
4.29
Manganese, Dissolved (mg/I as Mn)
59
3
0.928
<0.05
0.54
0.20
0.567
Mercury, Total (mg /I as Hg)
59
59
<0.0002
<0.0002
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
59
59
<0.005
<0.005
0.0025
ND
<0.005
Nitrate Nitrogen, Total (mg/I as N)
59
3
2.08
<0.05
0.33
0.39
0.199
Nitrite Nitrogen, Total (mg/I as N)
59
59
<0.05
<0.05
0.03
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
19
2
2.08
<0.05
0.57
0.51
0.439
Nitrogen, Ammonia, Total (mg/I as N)
59
58
0.064
<0.05
0.03
0.01
<0.05
Oil and Grease Visual (No =0, Yes =1)
41
0
0
0
0
0
0
Oxygen, Dissolved mg/L
61
0
6.5
0.1
0.8
1.4
0.21
pH, Field, Standard Units
65
0
11.82
6.64
7.20
0.94
6.88
Potassium, Total mg/I as K)
59
0
3.09
0.56
0.85
0.36
0.772
Selenium, Dissolved (mg/I as Se)
59
59
<0.005
<0.005
0.0025
ND
<0.005
Silver, Dissolved (mg/I as Ag)
59
59
<0.001
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
59
0
24
17.9
19.8
1.3
19.4
Specific Conductance,Field (umhos /cm @ 25C)
65
0
441
190
304
41
300
Sulfate, Total (mg/I as SO4)
59
0
107
50.8
71
8
69.4
Temperature, Water (Degrees Centigrade)
65
0
9.9
7.2
8.2
0.6
8.1
Total Dissolved Solids, mg/I
58
0
245
172
199
13
200
Total Suspend Solids, mg/I
59
58
11
<10
5
1
<10
Water Level,Distance From Measuring Point (Feet)
73
0
162.77
81.04
115.06
18.87
116.45
Weak Acid Dissociable Cyanide, mg/I
59
59
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
59
59
<0.05
<0.05
0.03
ND
<0.05
TABLE 6 -24
SAMPLE LOCATION: GVMW -8A
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 tandard deviation calculations.
Median calculations use the laboratory analyses with less than detection values as negative.