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)
35
34
10
<10
5.1
0.8
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
36
0
121
26.5
66.8
28.5
55.05
Alkalinity, Carbonate (mg/I as CaCO3)
36
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
14
0
93.1
33.7
56.5
21.9
46.8
Aluminum, Dissolved (mg/I as Al)
36
30
0.102
<0.05
0.027
0.014
<0.05
Arsenic, Dissolved (mg/I as As)
4
4
<0.005
<0.005
0.0025
ND
<0.005
Arsenic,Total Recoverable in Water as As mg /I
32
31
0.006
<0.005
0.003
0.001
<0.005
Cadmium, Dissolved (mg/I as Cd)
36
35
0.00405
<0.001
0.0006
0.0006
<0.001
Calcium, Total (mg/I as Ca)
36
0
104
60.3
88.9
10.1
90.85
Chloride,Total in Water mg/I
35
1
8
<0.5
1.3
1.3
1
Chromium, Dissolved (mg/I as Cr)
36
28
0.004
<0.001
0.001
0.001
<0.001
Copper, Dissolved (mg/I as Cu)
36
35
0.005
<0.005
0.003
0.0004
<0.005
Cyanide Free, mg/I
36
36
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
36
36
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg /I as F)
36
0
0.98
0.207
0.335
0.133
0.307
Hardness, Total (mg/I as CaCO3)
36
0
363
203
307
37
309.5
Iron, Dissolved (mg/I as Fe)
36
31
0.171
<0.05
0.035
0.030
<0.05
Lead, Dissolved (mg/I as Pb)
36
36
<0.001
<0.001
0.0005
ND
<0.001
Magnesium, Total (mg/I as Mg)
36
0
26.8
12.8
20.7
3.8
21.4
Manganese, Dissolved (mg/I as Mn)
36
22
0.415
<0.05
0.058
0.084
<0.05
Mercury, Total (mg/I as Hg)
36
35
0.0003
<0.002
0.0001
0.0002
<0.0002
Nickel, Dissolved (mg/I as Ni)
36
34
0.013
<0.005
0.003
0.002
<0.005
Nitrate Nitrogen, Total (mg/I as N)
36
0
1.29
0.38
0.75
0.21
0.7275
Nitrite Nitrogen, Total (mg/I as N)
36
35
0.118
<0.05
0.028
0.016
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
31
0
1.29
0.38
0.73
0.19
0.715
Nitrogen, Ammonia, Total (mg/I as N)
36
36
<0.05
<0.05
0.025
ND
<0.05
Oil and Grease Visual (No =0, Yes =1)
5
0
0
0
0
0
0
Oxygen, Dissolved mg/L
40
0
11.8
0.5
5.9
2.3
5.9
pH, Field, Standard Units
41
0
9.81
6.2
7.05
0.72
6.83
Potassium, Total mg/I as K)
36
0
4.65
0.97
1.86
0.77
1.625
Selenium, Dissolved (mg/I as Se)
36
36
<0.005
<0.005
0.0025
ND
<0.005
Silver, Dissolved (mg/I as Ag)
36
35
0.001
<0.001
0.001
0.000
<0.001
Sodium, Total (mg/I as Na)
36
0
14
9.6
11.8
1.1
11.75
Specific Conductance,Field (umhos /cm @ 25C)
40
0
1493
75
634
195
634
Sulfate, Total (mg/I as SO4)
36
0
323
195
267
35
271
Temperature, Water (Degrees Centigrade)
41
0
11.8
3.5
6.6
1.9
6.5
Total Dissolved Solids, mg/I
34
0
533
308
447
70
473.5
Total Suspend Solids, mg/I
36
10
416
<10
44
92
18.5
Water Level,Distance From Measuring Point (Feet)
39
0
194.33
122.4
168.1
18.8
171.5
Weak Acid Dissociable Cyanide, mg/I
36
36
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg /I as Zn)
36
31
0.081
<0.05
0.031
0.015
<0.05
TABLE 6 -18
SAMPLE LOCATION: CAM -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 thus 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.