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)
20
20
<10
<10
5
ND
<10
Alkalinity, Bicarbonate (mg/I as CaCO3)
22
0
47.6
11.5
27.5
11.2
22.8
Alkalinity, Carbonate (mg/I as CaCO3)
22
0
0
0
0
0
0
Alkalinity, Total (mg/I as CaCO3)
7
0
32.8
10.2
20.0
8.6
16.7
Aluminum, Dissolved (mg/I as Al)
20
2
1.09
<0.05
0.41
0.35
0.30
Arsenic,Total Recoverable in Water as As mg /I
22
20
0.009
<0.005
0.003
0.002
<0.005
Cadmium, Dissolved (mg/I as Cd)
22
21
0.001
<0.001
0.001
0.000
<0.001
Calcium, Total (mg/I as Ca)
22
0
18.1
6
12.8
3.0
12.2
Chloride,Total in Water mg/I
22
1
19
<0.5
7.8
5.5
6
Chromium, Dissolved (mg/I as Cr)
19
19
<0.001
<0.001
0.0005
ND
<0.001
Chromium,Total Recoverable in Water as Cr mg/I
3
0
0.013
0.001
0.005
0.007
0.001
Copper, Dissolved (mg/I as Cu)
22
20
0.005
<0.005
0.003
0.001
<0.005
Cyanide Free, mg/I
22
22
<0.01
<0.01
0.005
ND
<0.01
Cyanide, Total (mg/I as CN)
22
22
<0.01
<0.01
0.005
ND
<0.01
Flow, Rate Gallons /Min
69
0
150
0
12.1
30.0
0
Fluoride, Total (mg/I as F)
22
0
1.98
0.664
1.19
0.33
1.14
Hardness, Total (mg /I as CaCO3)
22
0
61.4
24.1
44.8
9.6
45.2
Iron, Dissolved (mg/I as Fe)
22
1
1.16
<0.05
0.38
0.28
0.3
Iron,Total Recoverable in Water as Fe mg/I
22
0
14.7
0.18
1.63
3.01
0.90
Lead, Dissolved (mg/I as Pb)
22
9
0.004
<0.001
0.002
0.001
0.001
Magnesium, Total (mg /I as Mg)
22
0
4.63
2.02
3.14
0.76
3.02
Manganese, Dissolved (mg/I as Mn)
22
12
0.464
<0.05
0.098
0.128
<0.05
Mercury, Total (mg /I as Hg)
22
22
<0.0002
<0.0002
0.0001
ND
<0.0002
Nickel, Dissolved (mg /I as Ni)
22
18
0.01
<0.005
0.003
0.002
<0.005
Nitrate Nitrogen, Total (mg /I as N)
22
4
2.38
<0.05
0.64
0.64
0.55
Nitrite Nitrogen, Total (mg/I as N)
22
20
0.064
<0.05
0.028
0.010
<0.05
Nitrite plus Nitrate, mg /I as Nitrogen
18
3
2.38
<0.05
0.72
0.66
0.573
Nitrogen, Ammonia, Total (mg/I as N)
22
17
0.124
<0.05
0.040
0.030
<0.05
Oil and Grease Visual (No =0, Yes =1)
20
0
0
0
0
0
0
Oxygen, Dissolved mg /L
20
0
11.4
4.4
7.3
1.8
7.2
pH, Field, Standard Units
23
0
9.41
5.96
7.31
0.73
7.29
Potassium, Total mg/I as K)
21
1
7.96
<0.5
3.57
2.24
2.88
Selenium, Dissolved (mg/I as Se)
22
22
<0.005
<0.005
0.0025
ND
<0.005
Silver, Dissolved (mg/I as Ag)
22
22
<0.001
<0.001
0.0005
ND
<0.001
Sodium, Total (mg/I as Na)
21
0
28.3
4.61
17.67
6.75
18.5
Specific Conductance,Field (umhos /cm @ 25C)
23
0
480
45
210
125
181.5
Sulfate, Total (mg/I as SO4)
22
1
77.9
<10
42.1
17.3
41.6
Temperature, Water (Degrees Centigrade)
23
0
20.7
0.1
11.7
6.0
11
Total Dissolved Solids, mg/I
22
0
200
41
125
40
128.5
Total Suspend Solids, mg /I
22
15
538
<10
53
143
<10
Weak Acid Dissociable Cyanide, mg /I
22
22
<0.01
<0.01
0.005
ND
<0.01
Zinc, Dissolved (mg /I as Zn)
22
21
0.079
<0.05
0.027
0.012
<0.05
TABLE 6 -1
SAMPLE LOCATION: GV -01
DRAINAGE: GRASSY VALLEY
PERIOD OF RECORD: 1997 -2011
ND = Not determined. Applicable in two cases: number of analyses = 1, or all analyses are non -detec
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