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 C4 CAM-1A Water chemistry summary statistics

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Station Identification: CAM 1A
Location: Grassy Valley
Station type: Groundwater
Period of record start: January 31, 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
Depth to Water ft 40 0 194.33 42.72 164.25 26.85
Water Temperature C 38 0 11.8 3.5 6.4 1.9
Conductivity µmhos 37 0 1493 75 634 203
pH su 38 0 9.8 6.3 7.1 0.7
Dissolved Oxygen ML I 0 11.80 0.50 6.06 2.29
General Parameters -
Total Dissolved Solids mg/I 31 0 533 308 444 72
Acidity mg/l 32 32 <10 <10 <10 ID
Alkalinity as CaCO3 mg/l 11 0 93 34 54 22
Ammonia mg/1 33 33 <0.05 <0.05 <0.05 ID
Hardness mg/l 33 0 363 203 306 38
Total Suspended Solids mg/l 33 10 406 <10 32 69
Special Parameters
Cyanide, Free mg/l 33 33 <0.01 <0.01 <0.01 ID
WAD Cyanide mg/l 33 33
<0.01
<0.01
<0.01
ID
Major Anions
Bicarbonate ion (as CaCO3) mg/l 32 0 121 27 66 29
Carbonate ion (as CaCO3) mg/l 32 32 <10 <0 <10 ID
Chloride, Total mg/l 32 t 8.00 <0.5 1.27 1.35
Fluoride, Total mg/l 33 0 0.98 0.21 0.34 0.14
Nitrate, Total mg11 33 0 1.29 0.38 0.74 0.21
Sulfate, Total mg/l 33 0 323.00 195.00 265.73 36.07
Major Cations
Calcium, Total mg/1 33 0 104.00 60.30 88.78 10.46
Magnesium, Total mg/1 33 0 26.80 12.80 20.60 3.92
Potassium, Total mg/1 33 0 4.32 0.97 1.79 0.63
Sodium, Total mg/l 33 0 14.00 9.60 11.82 1.10
Trace Metals
Arsenic, Dissolved mg/l 1 I
<0.005
<0.005
<0.005
ID
Cadmium, Dissolved mg/1 33 33
<0.001
<0.001
<0.001
ID
Chromium, Dissolved mg/l 33 25 0.004 <0.001 0.001 0.001
Copper, Dissolved mg/l 33 32 0.005 <0.005 0.003 0.0004
Iron, Dissolved mg/l 33 29 0.13 <0.05 0.03 0.02
Lead, Dissolved mg/l 33 33 <0.001 <0.001 <0.001 ID
Manganese, Dissolved mg/l 33 22 0.4150 <0.026 0.0592 0.0870
Mercury, Dissolved mg/l 0 0 NA NA NA NA
Nickel, Dissolved mg/1 33 32 0.0070 <0.001 0.0026 0.0009
Selenium, Dissolved mg/l 33 33 <0.005 <0.005 <0.005 ID
Silver, Dissolved mg/l 33 32 0.0010 <0.001 0.0005 0.0001
Zinc, Dissolved mg/l 33 26 0.08 <0.05 0.03 0.02
NA: Not anal wed
!D: Insufficient data
Nondetects set to '/: detection limit for calculations
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