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 A30 GRMW-2A Water chemistry summary statistics
Station Identification:
Location:
Station type:
Period of Record Start:
Period of Record End:
•
•
GRMW-2A
Gold Run
Groundwater
June 22, 1998
August 17, 2004
Parameters Units Number of
analytes Number of
nondetected values Maximum
value Minimum
value Average Standard
deviation
Field Parameters
Water Level ft bgl 31 0 76.72 54.10 65.69 5.80
Water Temp, C C 30 0 11.7 7.3 9.5 0.9
Conductivity µmhos 30 0 3400.00 351.00 2492.07 749.74
pH su 30 0 7.3 6.8 7.0 0.1
Dissolved Oxygen mg/l 28 2 4.20 <0 0.48 0.96
General Parameters
Total Dissolved Solids mg/1 28 0 2787 2557 2679 61
Acidity mg/l 30 0 18.0 10.0 12.3 1.7
Alkalinity as CaC03 mg/1 10 0 90 81 85 3
Ammonia mg/l 30 30 <0.05 <0.05 0.03 ID
Hardness mg/l 30 0 1930 1597 1794 89
Total Suspended Solids mg/1 30 17 64 <10 12 12
Special Parameters
CN, Free mg/l 30 30 <0.01 <0.01 0.01 ID
WAD CN mg/l 30 30 <0.01 <0.01 0.01 ID
Major Anions
Bicarbonate ion (as CaC03) mg/1 19 0 106 95 101 3
Carbonate ion (as CaC03) mg/1 19 19 <10 <0 5 ID
Chloride mg/1 30 0 25.00 4.50 10.18 5.49
Fluoride mg/1 30 0 4.15 3.40 3.78 0.20
Nitrate mg/1 30 25 0.14 <0.05 0.03 0.02
Sulfate mg/1 30 0 1903.00 1504.00 1722.57 86.13
Major Cations
Calcium mg/1 30 0 672.00 499.00 573.47 37.54
Magnesium mg/l 30 0 106.00 71.10 88.59 8.59
Potassium mg/l 30 0 4.89 3.61 4.26 0.33
Sodium mg/l 30 0 41.80 31.50 34.47 2.56
Trace Metals
Arsenic, (dissolved) mg/1 10 10 <0.005 <0.005 0.003 ID
Cadmium, (dissolved) mg/1 30 30 <0.001 <0.001 0.001 ID
Chromium, (dissolved) mg/1 30 25 0.003 <0.001 0.001 0.001
Copper, (dissolved) mg/I 30 20 0.012 <0.005 0.004 0.002
Iron, (dissolved) mg/1 30 1 1.48 <0.05 0.98 0.36
Lead, (dissolved) mg/1 30 21 0.0030 <0.001 0.0009 0.0007
Manganese, (dissolved) mg/l 30 l 4.69 <0.05 3.26 0.85
Mercury, (dissolved) mg/l 1 1 <0.0002 <0.0002 0.0001 ID
Nickel, (dissolved) mg/l 30 23 0.02 <0.005 0.004 0.004
Selenium, (dissolved) mg/l 30 23 0.0150 <0.005 0.0042 0.0036
Silver, (dissolved) mg/1 30 29 0.001 <0.001 0.001 0.0001
Zinc, (dissolved) mg/1 30 25 0.14 <0.05 0.03 0.02
NA: Not analyzed
ID: Insufficient data
Nondetects set to %z detection limit for calculations