2012-02-28_REVISION - M1980244 ‎(95)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 2/28/2012
• Doc Name: VOL. 2, Appendix 2: Hydrologic Evaluation Part 1
• 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)
47
47
<1
<10
4.8
ND
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
49
0
166
62.6
100
25
97.6
Alkalinity, Carbonate (mg/I as CaCO3)
49
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
18
0
136
50
90
28
88.7
Aluminum, Dissolved (mg /I as Al)
42
31
0.39
<0.1
0.05
0.06
<0.05
Arsenic,Total Recoverable in Water as As mg/I
51
35
0.042
<0.005
0.005
0.006
<0.005
Cadmium, Dissolved (mg/I as Cd)
51
51
<0.0001
<0.001
0.0005
ND
<0.001
Calcium, Total (mg/I as Ca)
51
0
68.2
39.9
55.1
6.8
56.2
Chloride,Total in Water mg/I
51
0
31.4
5.5
12.2
4.9
10.8
Chromium, Dissolved (mg /I as Cr)
38
38
<0.001
<0.005
0.0006
ND
<0.001
Chromium,Total Recoverable in Water as Cr mg/I
12
11
0.001
<0.001
0.001
2.3E -19
<0.001
Copper, Dissolved (mg /I as Cu)
51
48
0.008
<0.005
0.003
0.001
<0.005
Cyanide Free, mg/I
50
50
<0.01
<0.05
0.006
ND
<0.01
Cyanide, Total (mg/I as CN)
50
50
<0.005
<0.01
0.005
ND
<0.01
Flow, Rate Gallons /Min
54
0
1275
0
295
339
164.1
Fluoride, Total (mg/I as F)
51
0
1.36
0.6
1.03
0.13
1.03
Hardness, Total (mg/I as CaCO3)
51
0
258
0
192
47
200
Iron, Dissolved (mg/I as Fe)
50
44
0.302
<0.05
0.04
0.05
<0.05
Iron,Total Recoverable in Water as Fe mg/I
51
4
9.77
<0.05
0.85
1.52
0.339
Lead, Dissolved (mg /I as Pb)
51
48
0.002
<0.005
0.001
0.000
<0.001
Magnesium, Total (mg/I as Mg)
51
0
21.3
9.1
15.3
2.4
15.5
Manganese, Dissolved (mg/I as Mn)
51
28
0.609
<0.05
0.09
0.13
<0.01
Mercury, Total (mg/I as Hg)
51 '
51
<0.0001
<0.001
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
51
50
0.006
<0.01
0.003
0.001
<0.005
Nitrate Nitrogen, Total (mg/I as N)
51
2
13.4
<0.5
2.8
2.3
2.17
Nitrite Nitrogen, Total (mg/I as N)
51
50
0.053
<0.5
0.03
0.03
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
38
1
6.67
<0.5
2.39
1.46
1.935
Nitrogen, Ammonia, Total (mg/I as N)
51
50
0.068
<0.2
0.029
0.016
<0.05
Oil and Grease Visual (No =0, Yes =1)
14
0
0
0
0
. 0
0
Oxygen, Dissolved mg/L
50
0
11.5
4
8.6
1.4
8.35
pH, Field, Standard Units
51
0
8.68
6.69
7.99
0.42
8.09
Potassium, Total mg/I as K)
47
0
6.06
0.57
3.87
1.00
3.91
Selenium, Dissolved (mg/I as Se)
51
51
<0.005
<0.005
0.003
ND
<0.005
Silver, Dissolved (mg /I as Ag)
51
51
<0.0005
<0.001
0.0005
ND
<0.001
Sodium, Total (mg /I as Na)
47
0
78.8
13
30.4
12.4
28
Specific Conductance,Field (umhos /cm @ 25C)
51
0
1061
126.2
526
160
510
Sulfate, Total (mg/I as 504)
51
0
199
97
155
25
156
Temperature, Water (Degrees Centigrade)
51
0
19.3
-1
7.3
6.1
5.3
Total Dissolved Solids, mg/I
46
0
501
213
329
61
330.5
Total Suspend Solids, mg/I
51
24
283
<10
31
54
10
Weak Acid Dissociable Cyanide, mg/I
50
50
<0.005
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg /I as Zn)
51
50
0.02
<0.05
0.02
0.003
<0.05
TABLE 4-4
SAMPLE LOCATION: WCSW
DRAINAGE: WILSON CREEK
PERIOD OF RECORD: 1996 -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 chromium was analyzed until 2001 Total recoverable chromium was analyzed from 2003. Both forms are provided to indicate the entire analytical history