2008-04-15_REVISION - M1980244 ‎(295)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 4/15/2008
• Doc Name: VOL II Appendix 2, Attachment C- Grassy Valley Hydrologic Monitoring DFata Summaries
• From: CC&V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

Table C1 GV-01 Water chemistry summary statistics
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Station Identification: GVOI
Location: Grassy Valley
Station type: Surface Water
Period of record start: March 28, 1997
Period of record end: November 8, 2007

Laboratory Parameters
Units
Number of analyses Number of
non-detected values Maxiumum
value Minimum
value
Average Standard
deviation
Field Parameters
Water Temperature C 22 0 20.7 0.1 11.8 6.1
Conductivity µmhos 22 0 480 45 215 125
pH, Field su 22 0 9.4 6.0 7.3 0.7
Dissolved Oxygen mg/l 20 0 11.40 4.40 7.29 1.81
General Parameters
Total Dissolved Solids mg/1 22 0 200 41 125 40
Acidity mg/l 20 20 <10 <10 <10 ID
Alkalinity as CaCO3 mg/l 7 0 33 10 20 9
Ammonia mg/1 22 17 0.12 <0.05 0.04 0.03
Hardness mg/l 22 0 61 24 45 l0
Total Suspended Solids mg/l 22 15 538 <10 53 143
Special Parameters
Cyanide, Free mg/l 22 22 <0.01 <0.01 <0.01 ID
WAD Cyanide mg/l 22 22 <0.01 <0.01 <0.01 ID
Major Anions
Bicarbonate ion (as CaCO3) mg/l 19 0 48 12 29 11
Carbonate ion (as CaCO3) mg/l 19 18 5 <0 5 l
Chloride, Total mgfl 22 1 19.00 <0.5 7.76 5.51
Fluoride, Total mg/l 22 0 1.98 0.66 1.19 0.33
Nitrate, Total mg/l 22 4 2.38 <0.05 0.64 0.64
Sulfate, Total mg/l 22 1 77.90 <10 42.09 17.31
Major Cations
Calcium, Total mg/1 22 0 18.1 6 12.8 3.0
Magnesium, Total mg/l 22 0 4.63 2.02 3.1 0.8
Potassium, Total mg/l 21 l 7.96 <0.5 3.57 2.24
Sodium, Total mg/l 21 0 28.3 4.61 17.67 6.75
Trace Metals
Arsenic, Total recoverable mg/l 22 20 0.009 <0.005 0.003 0.002
Cadmium, Dissolved mg/l 22 21 0.001 <0.001 0.001 0.0001
Chromium, Total recoverable mg/1 3 0 0.013 0.001 0.005 0.007
Copper, Dissolved mg/1 22 20 0.005 <0.005 0.003 0.001
Iron, Dissolved mg/l 22 1 1.16 <0.05 0.38 0.28
Iron, Total recoverable mg/l 22 0 14.70 0.18 1.63 3.01
Lead, Dissolved mg/l 22 9 0.0040 <0.001 0.0016 0.0012
Manganese, Dissolved mg/l 22 12 0.46 <0.022 0.10 0.13
Mercury, Total mg/l 22 22 <0.0002 <0.0002 <0.0002 ID
Nickel, Dissolved mg/l 22 18 0.01 <0.005 0.003 0.002
Selenium, Dissolved mg/l 22 22 <0.005 <0.005 <0.005 ID
Silver, Dissolved mg/l 22 22 <0.001 <0.001 <0.00 I ID
Zinc, Dissolved mg/l 22 21 0.08 <0.05 0.03 0.01
NA: Not analyzed
ID: Insufficient data
Nondetects set to `%, detection limit for calculations
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