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
27
18
<20
8
4
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
45
0
43.3
17
24.5
6.3
21.9
Alkalinity, Carbonate (mg/I as CaCO3)
45
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
23
0
35.5
13.9
20.6
5.8
17.9
Aluminum, Dissolved (mg/I as Al)
45
34
0.255
<0.05
0.04
0.06
<0.05
Arsenic, Dissolved (mg/I as As)
11
11
<0.005
<0.005
0.0025
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
34
34
<0.005
<0.005
0.0025
ND
<0.005
Cadmium, Dissolved (mg/I as Cd)
45
40
0.00302
<0.001
0.001
0.0005
<0.001
Calcium, Total (mg/I as Ca)
45
0
80.6
10.1
24.0
13.8
21
Chloride,Total in Water mg/I
45
17
4
<0.5
0.8
0.9
0.5
Chromium, Dissolved (mg/I as Cr)
45
43
0.002
<0.001
0.001
0.0002
<0.001
Copper, Dissolved (mg/I as Cu)
45
45
<0.005
<0.005
0.0025
ND
<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
0.261
0.123
0.160
0.026
0.155
Hardness, Total (mg/I as CaCO3)
45
0
357
52.5
120
56
107
Iron, Dissolved (mg/I as Fe)
45
2
6.65
<0.05
2.37
2.07
1.86
Iron,Total Recoverable in Water as Fe mg/I
34
0
13.8
1.93
5.43
2.47
5.185
Lead, Dissolved (mg/I as Pb)
45
41
0.002
<0.001
0.001
0.0003
<0.001
Magnesium, Total (mg/I as Mg)
45
0
37.9
6.63
14.46
5.64
13.5
Manganese, Dissolved (mg /I as Mn)
44
0
10
0.339
2.1
1.6
2.155
Mercury, Total (mg/I as Hg)
45
45
<0.0002
<0.001
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
45
0
0.071
0.012
0.027
0.013
0.024
Nitrate Nitrogen, Total (mg /I as N)
45
40
0.093
<0.05
0.031
0.017
<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
32
0.0998
<0.05
0.029
0.015
<0.05
Nitrogen, Ammonia, Total (mg/I as N)
45
45
<0.05
<0.05
0.025
ND
<0.05
Oil and Grease Visual (No=0, Yes =1)
13
0
0
0
0
0
0
Oxygen, Dissolved mg/L
43
0
4
0.1
1.0
1.0
0.7
pH, Field, Standard Units
47
0
9.15
5.75
6.26
0.48
6.18
Potassium, Total mg/I as K)
45
0
7.89
0.86
2.09
1.25
1.68
Selenium, Dissolved (mg/I as Se)
45
44
0.00524
<0.005
0.0026
0.0004
<0.005
Silver, Dissolved (mg/I as Ag)
45
45
<0.001
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
45
0
15
8.57
10.1
1.2
9.82
Specific Conductance,Field (umhos /cm @ 25C)
46
0
873
165.5
339
135
296.5
Sulfate, Total (mg/I as 504)
45
0
365
51.6
124
59
110
Temperature, Water (Degrees Centigrade)
47
0
15.2
4.8
8.0
2.0
7.8
Total Dissolved Solids, mg/I
43
0
567
111
208
95
197
Total Suspend Solids, mg/I
45
9
502
<10
38
75
19
Water Level,Distance From Measuring Point (Feet)
58
0
45.97
27.53
35.46
4.97
35.225
Weak Acid Dissociable Cyanide, mg/I
45
45
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
45
1
0.37
<0.05
0.18
0.07
0.184
TABLE 6 -21
SAMPLE LOCATION: COB -1B
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