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)
55
48
14
<50
6
3
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
55
0
72.6
38.3
55.1
6.7
54.3
Alkalinity, Carbonate (mg/I as CaCO3)
55
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
39
0
53.1
31.4
42.9
4.2
42.8
Aluminum, Dissolved (mg/I as Al)
55
17
0.505
<0.05
0.05
0.08
0.024
Arsenic, Dissolved (mg/I as As)
37
37
<0.005
<0.005
0.0025
ND
<0.005
Cadmium, Dissolved (mg/I as Cd)
55
55
<0.001
<0.001
0.0005
ND
<0.001
Calcium, Total (mg/I as Ca)
55
0
50.8
26.5
33.3
4.6
32.9
Chloride,Total in Water mg/I
55
0
13.8
2
5.6
2.9
4.75
Chromium, Dissolved (mg/I as Cr)
55
45
0.003
<0.001
0.0007
0.0005
<0.001
Copper, Dissolved (mg/I as Cu)
55
53
0.008
<0.005
0.0027
0.0009
<0.005
Cyanide Free, mg/I
55
55
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg /I as CN)
55
55
<0.01
<0.01
0.005
ND
<0.01
Fluoride, Total (mg/I as F)
55
0
3.38
0.868
2.31
0.52
2.45
Hardness, Total (mg/I as CaCO3)
55
0
167
84.4
106
15
105
Iron, Dissolved (mg/I as Fe)
55
50
0.084
<0.05
0.03
0.01
<0.05
Lead, Dissolved (mg/I as Pb)
55
55
<0.001
<0.001
0.0005
ND
<0.001
Magnesium, Total (mg/I as Mg)
55
0
9.75
2.51
5.50
1.05
5.4
Manganese, Dissolved (mg/I as Mn)
55
41
0.135
<0.05
0.02
0.03
<0.01
Mercury, Total (mg/I as Hg)
55
55
<0.0002
<0.0002
0.0001
ND
<0.0002
Nickel, Dissolved (mg/I as Ni)
55
52
0.059
<0.005
0.0037
0.0076
<0.005
Nitrate Nitrogen, Total (mg/I as N)
55
0
2.23
0.636
1.53
0.43
1.52
Nitrite Nitrogen, Total (mg/I as N)
55
55
<0.05
<0.05
0.03
ND
<0.05
Nitrite plus Nitrate, mg/I as Nitrogen
17
0
1.64
0.636
1.12
0.29
1.18
Nitrogen, Ammonia, Total (mg/I as N)
55
53
0.058
<0.05
0.03
0.006
<0.05
Oil and Grease Visual (No =0, Yes =1)
41
0
0
0
0
0
0
Oxygen, Dissolved mg/L
62
0
9.5
3.2
6.7
1.3
6.85
pH, Field, Standard Units
64
0
8.84
6.44
6.88
0.44
6.75
Potassium, Total mg/I as K)
55
0
2.45
0.72
1.33
0.33
1.3
Selenium, Dissolved (mg/I as Se)
55
55
<0.005
<0.005
0.0025
ND
<0.005
Silver, Dissolved (mg/I as Ag)
55
55
<0.001
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
55
0
33.1
14.9
22.2
3.1
22.2
Specific Conductance,Field (umhos /cm @ 25C)
64
0
543
197
318
52
312.5
Sulfate, Total (mg/I as SO4)
55
0
180
53.1
86
22
83
Temperature, Water (Degrees Centigrade)
63
0
15.6
6.7
9.3
2.0
9
Temperature, Water (Degrees Fahrenheit)
21
0
57.7
44.2
50.0
3.1
50.4
Total Dissolved Solids, mg/I
54
0
368
176
223
40
216
Total Suspend Solids, mg/I
55
38
191
<10
14
27
<10
Water Level,Distance From Measuring Point (Feet)
74
0
45.85
10.05
32.09
8.40
33.63
Weak Acid Dissociable Cyanide, mg/I
55
55
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg/I as Zn)
55
55
<0.05
<0.05
0.03
ND
<0.05
TABLE 6 -25
SAMPLE LOCATION: GVMW -8B
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