ML13289A169

Summary of Water Quality Results for TRM 490.5, 2000 Through 2011

ML13289A169
Person / Time
Site:	Sequoyah
Issue date:	12/31/2011
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
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Summary of Water Quality Results for TRM 490.5, 2000 through 2011 No. of Analytical No. of  % Summary of Detected Results Parameter Samples Detection Units Detections Detection Min Max Average Stdev Alkalinity 45 1 10 mg/L 45 100% 44 89 66.3 9.4 Aluminum 15 0.10 mg/L 8 53.3% 0.1 0.61 0.23 0.16 Ammonia Nitrogen 78 0.01 0.10 mg/L 39 50.0% 0.01 0.22 0.04 0.04 Arsenic, Total 16 0.001 0.020 mg/L 4 25.0% 0.0010 0.0016 0.0014 0.0003 Photic Zone Compossited Samples (typically surface to 4 meters)

Cadmium, Total 16 0.0005 0.0050 mg/L 0 0% NA NA NA NA Calcium, Total 27 0.1 0.5 mg/L 27 100% 17 24 20.9 1.9 Chromium, Total 16 0.0010 0.010 mg/L 0 0% NA NA NA NA Copper, Total 16 0.0010 0.0200 mg/L 5 31.3% 0.0012 0.0026 0.0016 0.0006 Chlorophyll A 74 1 mg/m3 74 100% 2 25 12.5 5.5 Dissolved Solids 18 10 mg/L 18 100% 90 130 107.8 10.0 Iron, Total 16 0.1 mg/L 8 50% 0.12 0.74 0.25 0.20 Total Kjeldahl Nitrogen 78 0.02 0.5 mg/L 69 88.5% 0.12 0.63 0.33 0.11 Lead, Total 16 0.001 0.005 mg/L 1 6.3% 0.001 0.001 NA NA Magnesium, Total 27 0.01 0.10 mg/L 27 100% 4.3 6.7 5.5 0.6 Manganese, Total 15 0.01 mg/L 15 100% 0.026 0.068 0.043 0.012 Mercury, Total 3 0.0002 mg/L 0 0% NA NA NA NA Nickel, k l Totall 16 0.001 0.020 mg/L

/ 4 25.0% 0.0011 0.0018 0.0015 0.0003 NitrateNitrite, Total 80 0.01 0.10 mg/L 55 68.8% 0.01 0.58 0.20 0.10 Organic Nitrogen 78 0.02 0.5 mg/L 69 88.5% 0.1 0.63 0.31 0.12 Phosphorus, Total 75 0.002 0.003 mg/L 75 100% 0.01 0.07 0.03 0.01 Selenium, Total 16 0.001 0.020 mg/L 0 0% NA NA NA NA Sulfate, Total 14 15 mg/L 14 100% 12 16 14.6 1.3 Suspended Solids 73 1 mg/L 73 100% 2 12 4.9 2.3 Total Organic Carbon 79 0.2 1.0 mg/L 79 100% 1.2 3.2 2.3 0.4 Hardness, Total 27 mg/L as CaCO3 60 87 74.8 7.2 Zinc, Total 16 0.01 0.03 mg/L 0 0% NA NA NA NA Secchi 73 m 0.5 2.25 1.4 0.3 Water Column Water Temperature 617 C 12.64 30.6 23.5 4.4 pH 617 stand. units 6.5 9 7.5 0.4 Profiles Conductivity 617 µS/cm 117.9 225.2 178.2 21.9 Dissolved Oxygen 617 mg/L 0.87 12.45 6.7 2.2