2008-04-15_REVISION - M1980244 ‎(318)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 4/15/2008
• Doc Name: VOL II Appendix 2, Attachment A- Main Project Area Hydrologi Monitoring Data Summaries
• From: CC&V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

Table A11 T-2 Water chemistry summary statistics
Station Identification:
Location
Station Type:
Period of Record Start:
Period of Record End:
I i
T-2
North Fork of Wilson Creek
Surface Water
April 15, 1986
March 12, 2008

Parameters
Units Number of

analytes Number of

nondetected values Maximum

value Minimum

value
Average Standard

deviation
Field Parameters
Flow gpm 38 20 1000.00 <0 44.55 164.12
Water Temperature C 27 0 45.1 5.0 13.3 7.7
Conductivity gmhos 32 0 1440.00 150.00 810.50 267.56
pH su 26 0 7.6 6.4 7.1 0.3
Dissolved Oxygen mg/l 18 0 11.80 4.00 6.62 1.76
General Parameters
Total Dissolved Solids mg/l 28 0 1100 253 622 196
Acidity mg/l 18 16 16.0 <1 4.8 3.3
Alkalinity as CaCO3 mg/l 14 0 120 26 48' 23
Ammonia mg/l 24 20 0.40 <0.05 0.08 0.08
Hardness mg/l 19 0 580.00 180.00 352.16 98.12
Total Suspended Solids mg/l 25 18 138.00 <5 12.28 27.32
Special Parameters
CN, Free mg/l 38 26 0.31 <0.005 0.04 0.06
WAD CN mg/l 26 13 0.26 <0.005 0.03 0.06
Major Anions
Bicarbonate ion (as CaCO3) mg/1 23 0 150 31 59 23
Carbonate ion (as CaCO3) mg/l 22 22 <10 <5 4 ID
Chloride mg/l 24 0 16.80 4.00 9.47 3.36
Fluoride mg/1 25 5 1.20 <0.5 0.67 0.30
Nitrate mg/l 20 0 13.00 0.11 4.87 4.17
Sulfate mg/l 36 0 540.00 55.00 322.81 122.52
Major Cations
Calcium mg/l 22 0 170.00 51.70 103.53 28.69
Magnesium mg/1 21 0 39.00 12.30 25.60 7.45
Potassium mg/l 20 0 7.60 1.78 3.22 1.27
Sodium mg/l 20 0 78.00 21.50 47.06 13.50
Trace Metals
Arsenic, (total recoverable) mg/l 23 15 0.018 <0.001 0.004 0.004
Cadmium, (dissolved) mg/1 27 26 <0.005 <0.0001 0.001 0.001
Chromium, (total recoverable) mg/l 10 6 0.016 <0.001 0.005 0.005
Copper, (dissolved) mg/l 26 23 0.009 <0.005 0.003 0.002
Iron, (dissolved) mg/l 25 11 0.38 <0.02 0.08 0.10
Iron, (total recoverable) mg/1 19 0 5.92 0.05 0.80 1.34
Lead, (dissolved) mg/l 27 27 <0.005 <0.001 0.0015 ID
Manganese, (dissolved) mg/l 24 4 0.80 0.02 0.22 0.22
Mercury, (total) mg/1 25 22 0.0007 <0.0001 0.0001 0.0001
Nickel, (dissolved) mg/1 25 22 <0.05 <0.005 0.01 0.005
Selenium, (dissolved) mg/l 25 25 <0.005 <0.005 0.0025 ID
Silver, (dissolved) mg/l 27 24 0.001 <0.000 1 0.0004 0.0002
Zinc, (dissolved) mg/1 28 14 0.16 <0.005 0.03 0.03
NA: Not analyzed
ID: Insufficient data
Nondetects set to % detection limit for calculations
The dates of operation for this station encompass a period in which solution released by an operation not controlled by CC&V
reported to the North Fork of Wilson Creek Drainage up-gradient of this station. This release is reflected in values within this dataset as
monitored by CC&V.
•