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 C5 CAM-1 B Water chemistry summary statistics
1]
•
Station Identification: CAM 1B
Location: Grassy Valley
Station type: Groundwater
Period of record start: January 31, 1997
Period of record end: October 31, 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 43 0 62.11 53.40 56.06 1.87
Water Temperature C 39 0 10.7 2.7 6.4 2.0
Conductivity pmhos 38 0 399 56 108 56
PH su 39 0 11.5 6.2 7.2 LO
Dissolved Oxygen Mg/l 38 0 10.40 0.50 6.00 2.16
General Parameters
Total Dissolved Solids Mg/l 30 0 80 41 52 13
Acidity mg/l 32 32 <10 <10 <10 ID
Alkalinity as CaC03 mg/1 10 0 46 33 37 3
Ammonia mg/l 32 31 0.06 <0.05 0.03 0.01
Hardness mg/1 32 0 40 21 32 4
Total Suspended Solids mg/1 32 5 217 <10 42 46
Special Parameters
Cyanide, Free Mg/l 32 32 <0.01 <0.01 <0.01 ID
WAD Cyanide mg/l 32 32 <0.01 <0.01 <0.01 ID
Major Anions
Bicarbonate ion (as CaC03) mg/1 30 0 56 38 44 3
Carbonate ion (as CaC03) Mg/l 30 29 5 <0 5 1
Chloride, Total Mg/l 31 17 1.50 <0.5 0.41 0.26
Fluoride, Total mg/l 32 1 0.32 <0.05 0.25 0.05
Nitrate, Total mg/l 32 0 0.86 0.10 0.27 0.12
Sulfate, Total mg/1 32 27 16.60 <10 6.38 3.33
Major Cations
Calcium, Total Mg/l 32 0 12.50 6.00 9.74 1.52
Magnesium, Total mg/1 32 0 2.30 1.40 1.86 0.29
Potassium, Total mg/I 32 0 3.87 0.66 1.25 0.62
Sodium, Total Mg/l 32 0 7.19 4.89 6.04 0.45
Trace Metals
Arsenic, Total recoverable mg/1 30 28 0.059 <0.005 0.005 0.011
Cadmium, Dissolved Mg/l 32 31 0.001 <0.001 0.001 0.0001
Chromium, Total recoverable mg/1 0 0 NA NA NA NA
Copper, Dissolved mg/1 32 32 <0.005 <0.005 <0.005 ID
Iron, Dissolved Mg/l 32 25 0.43 <0.05 0.05 0.07
Iron, Total recoverable Mg/l 30 1 2.07 <0.05 0.64 0.53
Lead, Dissolved mg/l 32 29 0.0025 <0.001 0.0006 0.0004
Manganese, Dissolved Mg/l 32 28 0.36 <0.01 0.04 0.06
Mercury, Total Mg/l 32 32 <0.0002 <0.0002 <0.0002 ID
Nickel, Dissolved mg/l 32 32 <0.005 <0.001 <0.005 ID
Selenium, Dissolved mg/l 32 32 <0.005 <0.005 <0.005 ID
Silver, Dissolved mg/1 32 30 0.003 <0.001 0.001 0.0004
Zinc, Dissolved Mg/l 32 31 0.06 <0.05 0.03 0.01
NA: Not analvzed
ID: Insufficient data
Nondetects set to % detection limit far calculations