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)
34
25
16
<10
7
3
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
34
9
20.7
<12.2
11.4
4.4
12.1
Alkalinity, Carbonate (mg/I as CaCO3)
34
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
11
4
17
<10
9
4
9.1
Aluminum, Dissolved (mg/I as Al)
34
11
0.309
<0.05
0.102
0.084
0.09
Arsenic, Dissolved (mg/I as As)
4
4
<0.005
<0.005
0.003
ND
<0.005
Arsenic,Total Recoverable in Water as As mg/I
30
28
0.008
<0.005
0.003
0.001
<0.005
Cadmium, Dissolved (mg/I as Cd)
34
11
0.0029
<0.001
0.0011
0.0006
0.001
Calcium, Total (mg/I as Ca)
34
0
43.9
24.3
34.4
5.0
34.85
Chloride,Total in Water mg/I
34
0
20.5
3.5
8.7
4.3
7.5
Chromium, Dissolved (mg/I as Cr)
34
25
0.006
<0.001
0.001
0.001
<0.001
Copper, Dissolved (mg/I as Cu)
34
30
0.008
<0.005
0.003
0.001
<0.005
Cyanide Free, mg/I
35
35
<0.01
<0.02
0.010
ND
<0.02
Cyanide, Total (mg/I as CN)
35
1
0.117
<0.01
0.081
0.021
0.083
Fluoride, Total (mg/I as F)
34
0
0.195
0.063
0.113
0.033
0.1095
Hardness, Total (mg/I as CaCO3)
34
0
145
86.2
115.5
15.2
117.5
Iron, Dissolved (mg/I as Fe)
34
15
0.383
<0.05
0.088
0.094
0.0655
Lead, Dissolved (mg/I as Pb)
34
28
0.0038
<0.005
0.0009
0.0009
<0.001
Magnesium, Total (mg/I as Mg)
34
0
8.93
5.09
7.25
1.07
7.305
Manganese, Dissolved (mg/I as Mn)
33
16
0.235
<0.05
0.057
0.044
0.053
Mercury, Total (mg/I as Hg)
33
26
0.0037
<0.0002
0.0003
0.0007
<0.0002
Nickel, Dissolved (mg/I as Ni)
34
5
0.027
<0.005
0.008
0.005
0.007
Nitrate Nitrogen, Total (mg/I as N)
34
0
18.5
5.83
10.6
2.0
10.7
Nitrite Nitrogen, Total (mg/I as N)
34
33
0.059
<0.05
0.026
0.006
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
29
0
18.5
8.92
11.1
1.7
11.1
Nitrogen, Ammonia, Total (mg/I as N)
34
32
0.072
<0.05
0.028
0.010
<0.05
Oil and Grease Visual (No =0, Yes =1)
9
0
0
0
0
0
0
Oxygen, Dissolved mg/L
37
0
8
0.1
3.6
1.9
3.3
pH, Field, Standard Units
41
0
7.2
5.36
5.9
0.4
5.74
Potassium, Total mg/I as K)
34
0
38.8
2.69
5.07
6.18
3.41
Selenium, Dissolved (mg/I as Se)
34
33
0.005
<0.005
0.003
0.0004
<0.005
Silver, Dissolved (mg/I as Ag)
34
34
<0.001
<0.001
0.001
ND
<0.001
Sodium, Total (mg/I as Na)
34
0
34.5
17.6
26.3
4.8
26.25
Specific Conductance,Field (umhos /cm @ 25C)
39
0
526
55.6
363
83.4
372
Sulfate, Total (mg/I as 504)
34
0
142
78.1
111
14.6
113.5
Temperature, Water (Degrees Centigrade)
41
0
12.2
5.2
7.8
1.6
8
Total Dissolved Solids, mg/I
32
0
420
203
287
49
290.5
Total Suspend Solids, mg/I
34
3
1013
<10
202
244
95.5
Water Level,Distance From Measuring Point (Feet)
78
0
218.65
185.88
203.55
8.75
206.85
Weak Acid Dissociable Cyanide, mg/I
35
2
0.049
<0.01
0.029
0.009
0.029
Zinc, Dissolved (mg/I as Zn)
34
24
0.1
<0.05
0.038
0.022
<0.05
TABLE 6 -8
SAMPLE LOCATION: GVMW -5
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.