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)
66
1
70
<10
26.8
12.9
22
Alkalinity, Bicarbonate (mg/I as CaCO3)
66
3
56.8
<10
22.9
12.5
19.15
Alkalinity, Carbonate (mg/I as CaCO3)
66
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
45
11
28.4
<10
13.1
5.8
13.7
Aluminum, Dissolved (mg/I as Al)
66
0
9.55
0.531
2.07
1.85
1.42
Arsenic, Dissolved (mg/I as As)
45
45
<0.005
<0.05
0.003
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
21
20
0.074
<0.005
0.006
0.016
<0.005
Cadmium, Dissolved (mg/I as Cd)
66
26
0.009
<0.001
0.002
0.002
0.001
Calcium, Total (mg/I as Ca)
66
0
321
128
193.8
46.7
181.5
Chloride,Total in Water mg/I
66
0
105
14.5
44.3
21.1
43
Chromium, Dissolved (mg/I as Cr)
66
57
0.005
<0.001
0.001
0.001
<0.001
Copper, Dissolved (mg/I as Cu)
66
61
0.007
<0.005
0.003
0.001
<0.005
Cyanide Free, mg/I
65
65
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
66
66
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
66
0
18.7
2.2
5.34
3.44
4.39
Hardness, Total (mg/I as CaCO3)
66
0
1280
441
677.2
193.4
610.5
Iron, Dissolved (mg/I as Fe)
66
62
0.104
<0.05
0.03
0.01
<0.05
Lead, Dissolved (mg/I as Pb)
66
63
0.004
<0.001
0.001
0.001
<0.001
Magnesium, Total (mg/I as Mg)
66
0
117
26.3
47.1
20.1
39.25
Manganese, Dissolved (mg/I as Mn)
66
2
49
<0.05
7.52
12.57
1.71
Mercury, Total (mg/I as Hg)
66
66
<0.0002
<0.0002
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
66
0
0.125
0.005
0.029
0.026
0.024
Nitrate Nitrogen, Total (mg/I as N)
66
2
3.8
<0.05
0.95
0.95
0.51
Nitrite Nitrogen, Total (mg/I as N)
66
66
<0.05
<0.05
0.03
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
19
0
3.2
0.124
0.93
0.92
0.49
Nitrogen, Ammonia, Total (mg/I as N)
66
62
0.065
<0.05
0.03
0.008
<0.05
Oil and Grease Visual (No =0, Yes =1)
43
0
0
0
0
0
0
Oxygen, Dissolved mg/L
68
0
8.6
0.1
2.32
1.76
2.1
pH, Field, Standard Units
68
0
7.24
5.49
5.98
0.39
5.88
Potassium, Total mg/I as K)
66
0
7.34
4.03
5.73
0.67
5.74
Selenium, Dissolved (mg/I as Se)
66
63
0.023
<0.005
0.003
0.003
<0.005
Silver, Dissolved (mg/I as Ag)
66
65
0.004
<0.001
0.001
0.0004
<0.001
Sodium, Total (mg/I as Na)
66
0
52
19.2
31.0
6.8
29.6
Specific Conductance,Field (umhos /cm @ 25C)
68
0
2070
827
1270.1
278.4
1191
Sulfate, Total (mg/I as SO4)
66
0
1330
422
668.1
204.3
595
Temperature, Water (Degrees Centigrade)
68
0
15.2
5.8
9.6
2.0
9.3
Total Dissolved Solids, mg/I
59
0
2110
658
1073.2
307.4
961
Total Suspend Solids, mg/I
66
57
79
<10
9.3
14.3
<10
Water Level,Distance From Measuring Point (Feet)
81
0
51.85
16.95
34.62
7.61
35.88
Weak Acid Dissociable Cyanide, mg/I
66
66
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
66
9
1.59
<0.05
0.26
0.33
0.185
TABLE 5 -5
SAMPLE LOCATION: SGMW -3B
DRAINAGE: SQUAW GULCH
PERIOD OF RECORD: 1998 -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 since 2002. Total recoverable arsenic was analyzed from 1998 -2001 Both forms are provided to indicate the entire analytical history