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)
45
0
192
12
148
41
160
Alkalinity, Bicarbonate (mg/I as CaCO3)
45
1
38.8
<10
23
11
22.7
Alkalinity, Carbonate (mg/I as CaCO3)
45
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
22
2
31.8
<10
16
10
16.35
Aluminum, Dissolved (mg/I as Al)
45
40
0.063
<0.05
0.03
0.01
<0.05
Arsenic, Dissolved (mg/I as As)
11
11
<0.005
<0.005
0.003
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
34
34
<0.005
<0.005
0.003
ND
<0.005
Cadmium, Dissolved (mg/I as Cd)
45
42
0.00157
<0.001
0.00055
0.00019
<0.001
Calcium, Total (mg/I as Ca)
45
0
97.9
27.5
67.7
13.8
69.5
Chloride,Total in Water mg/I
45
12
4
<0.5
0.9
0.8
0.5
Chromium, Dissolved (mg/I as Cr)
45
43
0.002
<0.001
0.0005
0.0002
<0.001
Copper, Dissolved (mg/I as Cu)
45
44
0.01
<0.005
0.003
0.001
<0.005
Cyanide Free, mg/I
45
45
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
45
45
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
45
0
0.095
0.053
0.084
0.008
0.085
Hardness, Total (mg/I as CaCO3)
45
0
497
177
404
75
419
Iron, Dissolved (mg/I as Fe)
45
1
112
<0.05
79.2
28.8
84.9
Lead, Dissolved (mg/I as Pb)
45
44
0.001
<0.001
0.0005
0.0001
<0.001
Magnesium, Total (mg/I as Mg)
45
0
70.7
22.8
57.0
12.0
59.9
Manganese, Dissolved (mg /I as Mn)
44
1
54
<0.01
30.6
11.0
29.55
Mercury, Total (mg/I as Hg)
45
45
<0.0002
<0.0002
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
45
1
0.263
<0.005
0.148
0.051
0.157
Nitrate Nitrogen, Total (mg/I as N)
45
45
<0.05
<0.05
0.025
ND
<0.05
Nitrite Nitrogen, Total (mg/I as N)
45
45
<0.05
<0.05
0.025
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
34
33
0.0998
<0.05
0.03
0.01
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
45
42
0.194
<0.05
0.03
0.04
<0.05
Oil and Grease Visual (No =0, Yes =1)
13
0
0
0
0
0
0
Oxygen, Dissolved mg/L
41
0
5.7
0
0.7
1.3
0.1
pH, Field, Standard Units
48
0
6.84
4.12
6.21
0.45
6.3
Potassium, Total mg/I as K)
45
0
3.09
1.31
2.23
0.31
2.24
Selenium, Dissolved (mg/I as Se)
45
45
<0.001
<0.005
0.002
ND
<0.005
Silver, Dissolved (mg/I as Ag)
45
44
0.002
<0.001
0.0005
0.0002
<0.001
Sodium, Total (mg/I as Na)
45
0
17
9.79
13.1
1.2
13.2
Specific Conductance,Field (umhos /cm @ 25C)
46
0
1331
463
976
209
1006.5
Sulfate, Total (mg/I as SO4)
45
0
682
218
566
109
583
Temperature, Water (Degrees Centigrade)
48
0
8.6
4.1
5.5
0.9
5.25
Temperature, Water (Degrees Fahrenheit)
11
0
46.6
40.5
42.2
2.0
41.5
Total Dissolved Solids, mg/I
43
0
1135
363
883
190
959
Total Suspend Solids, mg/I
45
18
97
<10
14
15
11
Water Level,Distance From Measuring Point (Feet)
58
0
43.5
23.78
32.3
5.4
31.915
Weak Acid Dissociable Cyanide, mg /I
45
45
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
45
2
1.96
<1
1.0
0.3
1.04
TABLE 6-20
SAMPLE LOCATION: COB -1A
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 2001 Both forms are provided to indicate the entire analytical history