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 C13 GVMW-5A Water chemistry summary statistics
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Station Identification: GVMW SA
Location: Grassy Valley
Station type: Groundwater
Period of record start: July 14, 1997
Period of record end: October 25, 2007

Laboratory Parameters
Units
Number of analyses Number of
non-detected values Maxiumum
value Minimum
value Average Standard deviation
Field Parameters
Depth to Water
Water Temperature ft
C 69
39 0
0 218.65
12.2 185.88
5.2 202.66
7.9 8.86
1.6
Conductivity µmhos 37 0 526 56 363 86
pH
Dissolved Oxygen su
mg/l 39
35 0
0 7.2
8.00 5.4
0.10 5.9
3.57 0.4
1.93
General Parameters
Total Dissolved Solids mg/I 31 0 369 203 282 43
Acidity mg/l 33 25 16.0 <10 6.6 3.0
Alkalinity as CaC03 Mg/l l0 3 17 <10 10 4
Ammonia mg/l 33 31 0.07 <0.05 0.03 0.01
Hardness mg/l 33 0 145 86 115 15
Total Suspended Solids mg/I 33 3 1013 <10 181 214
Special Parameters
Cyanide, Free mg/l 34 34 <0.02 <0.0I <0.02 ID
WAD Cyanide Mg/l 34 1 0.05 <0.01 0.03 0.01
Major Anions
Bicarbonate ion (as CaC03) mg/l 30 5 21 <10 12 4
Carbonate ion (as CaC03) mg/l 30 29 5 <0 5 1
Chloride, Total mg/l 33 0 20.50 3.50 8.73 4.31
Fluoride, Total mg/l 33 0 0.20 0.06 0.11 0.03
Nitrate, Total mg/l 33 0 18.50 5.83 10.69 1.99
Sulfate, Total Mg/l 33 0 142.00 78.10 111.41 14.81
Major Cations
Calcium, Total mg/I 33 0 43.90 24.30 34.44 5.08
Magnesium, Total Mg/l 33 0 8.93 5.09 7.23 1.08
Potassium, Total mg/I 33 0 8.65 2.69 4.05 1.66
Sodium, Total Mg/l 33 0 34.50 17.60 26.58 4.62
Trace Metals
Arsenic, Total recoverable Mg/l 30 28 0.008 <0.005 0.003 0.001
Cadmium, Dissolved mg/I 33 11 0.002 <0.001 0.001 0.001
Chromium, Total recoverable mg/l 0 0 NA NA NA NA
Copper, Dissolved mg/l 33 29 0.008 <0.002 0.003 0.001
Iron, Dissolved Mg/l 33 15 0.38 <0.05 0.08 0.09
Iron, Total recoverable Mg/l 30 0 7.71 0.12 1.88 1.86
Lead, Dissolved mg/l 33 28 0.0030 <0.001 0.0008 0.0007
Manganese, Dissolved mg/l 32 16 0.24 <0.05 0.06 0.04
Mercury, Total mg/l 32 26 0.0013 <0.0002 0.0002 0.0002
Nickel, Dissolved mg/I 33 5 0.03 <0.005 0.01 0.01
Selenium, Dissolved mg/I 33 32 0.0050 <0.005 0.0026 0.0004
Silver, Dissolved mg/l 33 33 <0.00I <0.001 <0.001 ID
Zinc, Dissolved mg/1 33 24 0.10 <0.05 0.04 0.02
NA: Not analyed
ID: Insufficient data
Nondetecis set to '/: detection limit for calculations
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