Independent Environmental Monitoring Program: Elliot Lake historical mine sites

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Publication date: August 30, 2019

Rio Algom Limited and Denison Mines Limited are licensed by the Canadian Nuclear Safety Commission (CNSC) to operate historical mine sites in Elliot Lake, Ontario. Uranium mining was conducted in the area for approximately 40 years, from the late 1950s to the mid-1960s, and again from the early 1970s until the early 1990s, when most of the mines ceased operations.

The results of the Independent Environmental Monitoring Program (IEMP) for 2015 and 2018 confirm that the public and the environment around the Elliot Lake historical mine sites are protected and that there are no expected health or environmental impacts.

Legend

[ ] Guideline/Reference Level

Elliot Lake historical mine sites

Sample Type Sample Description Parameter 2015 2018 Guideline/
Reference Level		 Expected Health Impact (Yes/No) Sample Code
Sediment 0-5 cm Uranium 2.00 mg/kg dry weight 3.81 mg/kg dry weight N/A No EL01-SE01
Sediment 0-5 cm pH N/A 6.5 No EL01-SE01
Sediment 0-5 cm Copper 8.88 mg/kg dry weight 12.21 mg/kg dry weight 16 - 110 mg/kg dry weight No EL01-SE01
Sediment 0-5 cm Lead 12.13 mg/kg dry weight 17.27 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL01-SE01
Sediment 0-5 cm Nickel 11.32 mg/kg dry weight 14.65 mg/kg dry weight 16 - 75 mg/kg dry weight No EL01-SE01
Sediment 0-5 cm Zinc 34.69 mg/kg dry weight 61.51 mg/kg dry weight 123 - 315 mg/kg dry weight No EL01-SE01
Sediment 0-5 cm Iron 12076 mg/kg dry weight 15499 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL01-SE01
Sediment 0-5 cm Arsenic 1.90 mg/kg dry weight 2.35 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL01-SE01
Sediment 0-5 cm Radium-226 19.2 Bq/kg dry weight 31.6 Bq/kg 4852 Bq/kg dry weight No EL01-SE01
Sediment 0-5 cm Selenium 0.23 mg/kg dry weight 0.99 mg/kg dry weight N/A No EL01-SE01
Sediment 0-5 cm Molybdenum 0.23 mg/kg dry weight 0.50 mg/kg dry weight N/A No EL01-SE01
Sediment 0-5 cm Cobalt 7.71 mg/kg dry weight 9.82 mg/kg dry weight N/A No EL01-SE01
Water Surface Water Uranium 0.11 µg/L 0.19 µg/L 15 µg/L No EL01-W01
Water Surface Water pH 7.5 7.0 6.5-9.0 No EL01-W01
Water Surface Water Copper 0.89 µg/L 0.64 µg/L 2 - 4 µg/L No EL01-W01
Water Surface Water Lead <0.1 µg/L 0.06 µg/L 1 - 7 µg/L No EL01-W01
Water Surface Water Nickel 0.36 µg/L 0.39 µg/L 25 - 150 µg/L No EL01-W01
Water Surface Water Zinc 2.82 µg/L 0.53 µg/L 30 µg/L No EL01-W01
Water Surface Water Iron 70.40 µg/L 216 µg/L 300 µg/L No EL01-W01
Water Surface Water Arsenic 0.21 µg/L 0.36 µg/L 5 µg/L No EL01-W01
Water Surface Water Total Dissolved Solids 22.1 mg/L N/A 500 mg/L No EL01-W01
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL01-W01
Water Surface Water Selenium 0.11 µg/L 0.08 µg/L 1 µg/L No EL01-W01
Water Surface Water Molybdenum 0.18 µg/L 0.11 µg/L 73 µg/L No EL01-W01
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL01-W01
Water Surface Water Total Organic Carbon 5.17 mg/L N/A N/A No EL01-W01
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL01-W01
Water Surface Water Total Suspended Solids 1.1 mg/L N/A N/A No EL01-W01
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL01-W01
Water Surface Water Chloride 0.32 mg/L N/A 250 mg/L No EL01-W01
Water Surface Water Cobalt <0.1 µg/L 0.14 µg/L N/A No EL01-W01
Water Surface Water Nitrite + Nitrate 0.26 mg/L N/A 13 mg/L No EL01-W01
Sediment 0-5 cm Uranium 2.55 mg/kg dry weight N/A N/A No EL02-SE02
Sediment 0-5 cm Copper 21.33 mg/kg dry weight N/A 16 - 110 mg/kg dry weight No EL02-SE02
Sediment 0-5 cm Lead 46.49 mg/kg dry weight N/A 35 - 91.3 mg/kg dry weight No EL02-SE02
Sediment 0-5 cm Nickel 23.49 mg/kg dry weight N/A 16 - 75 mg/kg dry weight No EL02-SE02
Sediment 0-5 cm Zinc 74.99 mg/kg dry weight N/A 123 - 315 mg/kg dry weight No EL02-SE02
Sediment 0-5 cm Iron 14502 mg/kg dry weight N/A 20,000- 40,000 mg/kg dry weight No EL02-SE02
Sediment 0-5 cm Arsenic 3.72 mg/kg dry weight N/A 5.9 - 17 mg/kg dry weight No EL02-SE02
Sediment 0-5 cm Radium-226 53.0 Bq/kg dry weight N/A 4852 Bq/kg dry weight No EL02-SE02
Sediment 0-5 cm Selenium 0.99 mg/kg dry weight N/A N/A No EL02-SE02
Sediment 0-5 cm Molybdenum 0.69 mg/kg dry weight N/A N/A No EL02-SE02
Sediment 0-5 cm Cobalt 19.82 mg/kg dry weight N/A N/A No EL02-SE02
Water Surface Water Uranium <0.1 µg/L N/A 15 µg/L No EL02-W02
Water Surface Water pH 7.0 N/A 6.5-9.0 No EL02-W02
Water Surface Water Copper 0.71 µg/L N/A 2 - 4 µg/L No EL02-W02
Water Surface Water Lead 0.11 µg/L N/A 1 - 7 µg/L No EL02-W02
Water Surface Water Nickel 0.84 µg/L N/A 25 - 150 µg/L No EL02-W02
Water Surface Water Zinc 8.70 µg/L N/A 30 µg/L No EL02-W02
Water Surface Water Iron 114.79 µg/L N/A 300 µg/L No EL02-W02
Water Surface Water Arsenic 0.24 µg/L N/A 5 µg/L No EL02-W02
Water Surface Water Total Dissolved Solids 217 mg/L N/A 500 mg/L No EL02-W02
Water Surface Water Radium-226 <0.03 Bq/L N/A 0.5 Bq/L No EL02-W02
Water Surface Water Selenium <0.1 µg/L N/A 1 µg/L No EL02-W02
Water Surface Water Molybdenum <0.1 µg/L N/A 73 µg/L No EL02-W02
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL02-W02
Water Surface Water Total Organic Carbon 4.25 mg/L N/A N/A No EL02-W02
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL02-W02
Water Surface Water Total Suspended Solids 2.6 mg/L N/A N/A No EL02-W02
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL02-W02
Water Surface Water Chloride 91.14 mg/L N/A 250 mg/L No EL02-W02
Water Surface Water Cobalt 1.79 µg/L N/A N/A No EL02-W02
Water Surface Water Nitrite + Nitrate <0.1 mg/L N/A 13 mg/L No EL02-W02
Sediment 0-5 cm Uranium N/A 1.76 mg/kg dry weight N/A No EL03-SE03
Sediment 0-5 cm pH N/A 6.4 No EL03-SE03
Sediment 0-5 cm Copper N/A 20.99 mg/kg dry weight 16 - 110 mg/kg dry weight No EL03-SE03
Sediment 0-5 cm Lead N/A 16.05 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL03-SE03
Sediment 0-5 cm Nickel N/A 12.19 mg/kg dry weight 16 - 75 mg/kg dry weight No EL03-SE03
Sediment 0-5 cm Zinc N/A 25.12 mg/kg dry weight 123 - 315 mg/kg dry weight No EL03-SE03
Sediment 0-5 cm Iron N/A 13416 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL03-SE03
Sediment 0-5 cm Arsenic N/A 0.88 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL03-SE03
Sediment 0-5 cm Radium-226 N/A 14.5 Bq/kg 4852 Bq/kg dry weight No EL03-SE03
Sediment 0-5 cm Selenium N/A 0.46 mg/kg dry weight N/A No EL03-SE03
Sediment 0-5 cm Molybdenum N/A 0.21 mg/kg dry weight N/A No EL03-SE03
Sediment 0-5 cm Cobalt N/A 4.76 mg/kg dry weight N/A No EL03-SE03
Water Surface Water Uranium <0.1 µg/L <0.1 µg/L 15 µg/L No EL03-W03
Water Surface Water pH 7.5 7.3 µg/L 6.5-9.0 No EL03-W03
Water Surface Water Copper 0.54 µg/L 0.43 µg/L 2 - 4 µg/L No EL03-W03
Water Surface Water Lead <0.1 µg/L <0.01 µg/L 1 - 7 µg/L No EL03-W03
Water Surface Water Nickel 0.21 µg/L 0.23 µg/L 25 - 150 µg/L No EL03-W03
Water Surface Water Zinc 2.84 µg/L <0.11 µg/L 30 µg/L No EL03-W03
Water Surface Water Iron 11.38 µg/L 4.30 µg/L 300 µg/L No EL03-W03
Water Surface Water Arsenic 0.14 µg/L 0.15 µg/L 5 µg/L No EL03-W03
Water Surface Water Total Dissolved Solids 18.0 mg/L N/A 500 mg/L No EL03-W03
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL03-W03
Water Surface Water Selenium <0.1 µg/L 0.05 µg/L 1 µg/L No EL03-W03
Water Surface Water Molybdenum <0.1 µg/L 0.01 µg/L 73 µg/L No EL03-W03
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL03-W03
Water Surface Water Total Organic Carbon 2.82 mg/L N/A N/A No EL03-W03
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL03-W03
Water Surface Water Total Suspended Solids 0.2 mg/L N/A N/A No EL03-W03
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL03-W03
Water Surface Water Chloride 1.35 mg/L N/A 250 mg/L No EL03-W03
Water Surface Water Cobalt <0.1 µg/L <0.01 µg/L N/A No EL03-W03
Water Surface Water Nitrite + Nitrate 0.21 mg/L N/A 13 mg/L No EL03-W03
Sediment 0-5 cm Uranium N/A 3.79 mg/kg dry weight N/A No EL04-SE04
Sediment 0-5 cm pH N/A 6.6 No EL04-SE04
Sediment 0-5 cm Copper N/A 28.09 mg/kg dry weight 16 - 110 mg/kg dry weight No EL04-SE04
Sediment 0-5 cm Lead N/A 32.07 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL04-SE04
Sediment 0-5 cm Nickel N/A 18.88 mg/kg dry weight 16 - 75 mg/kg dry weight No EL04-SE04
Sediment 0-5 cm Zinc N/A 101.6 mg/kg dry weight 123 - 315 mg/kg dry weight No EL04-SE04
Sediment 0-5 cm Iron N/A 15989 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL04-SE04
Sediment 0-5 cm Arsenic N/A 3.28 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL04-SE04
Sediment 0-5 cm Radium-226 N/A 48.2 Bq/kg 4852 Bq/kg dry weight No EL04-SE04
Sediment 0-5 cm Selenium N/A 1.42 mg/kg dry weight N/A No EL04-SE04
Sediment 0-5 cm Molybdenum N/A 1.13 mg/kg dry weight N/A No EL04-SE04
Sediment 0-5 cm Cobalt N/A 12.64 mg/kg dry weight N/A No EL04-SE04
Water Surface Water Uranium 0.10 µg/L <0.1 µg/L 15 µg/L No EL04-W04
Water Surface Water pH 7.4 7.4 6.5-9.0 No EL04-W04
Water Surface Water Copper 1.48 µg/L 1.29 µg/L 2 - 4 µg/L No EL04-W04
Water Surface Water Lead <0.1 µg/L 0.01 µg/L 1 - 7 µg/L No EL04-W04
Water Surface Water Nickel 0.34 µg/L 0.31 µg/L 25 - 150 µg/L No EL04-W04
Water Surface Water Zinc 2.57 µg/L 0.46 µg/L 30 µg/L No EL04-W04
Water Surface Water Iron 18.33 µg/L 12.8 µg/L 300 µg/L No EL04-W04
Water Surface Water Arsenic 0.19 µg/L 0.23 µg/L 5 µg/L No EL04-W04
Water Surface Water Total Dissolved Solids 19.8 mg/L N/A 500 mg/L No EL04-W04
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL04-W04
Water Surface Water Selenium 0.11 µg/L 0.07 µg/L 1 µg/L No EL04-W04
Water Surface Water Molybdenum <0.1 µg/L 0.06 µg/L 73 µg/L No EL04-W04
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL04-W04
Water Surface Water Total Organic Carbon 4.99 mg/L N/A N/A No EL04-W04
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL04-W04
Water Surface Water Total Suspended Solids 0.2 mg/L N/A N/A No EL04-W04
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL04-W04
Water Surface Water Chloride 1.31 mg/L N/A 250 mg/L No EL04-W04
Water Surface Water Cobalt <0.1 µg/L 0.02 µg/L N/A No EL04-W04
Water Surface Water Nitrite + Nitrate 0.24 mg/L N/A 13 mg/L No EL04-W04
Sediment 0-5 cm Uranium N/A 20.90 mg/kg dry weight N/A No EL06-SE06
Sediment 0-5 cm pH N/A 6.4 No EL06-SE06
Sediment 0-5 cm Copper N/A 25.10 mg/kg dry weight 16 - 110 mg/kg dry weight No EL06-SE06
Sediment 0-5 cm Lead N/A 161.1 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL06-SE06
Sediment 0-5 cm Nickel N/A 25.93 mg/kg dry weight 16 - 75 mg/kg dry weight No EL06-SE06
Sediment 0-5 cm Zinc N/A 63.60 mg/kg dry weight 123 - 315 mg/kg dry weight No EL06-SE06
Sediment 0-5 cm Iron N/A 18045 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL06-SE06
Sediment 0-5 cm Arsenic N/A 2.97 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL06-SE06
Sediment 0-5 cm Radium-226 N/A 215.0 Bq/kg 4852 Bq/kg dry weight No EL06-SE06
Sediment 0-5 cm Selenium N/A 0.92 mg/kg dry weight N/A No EL06-SE06
Sediment 0-5 cm Molybdenum N/A 0.67 mg/kg dry weight N/A No EL06-SE06
Sediment 0-5 cm Cobalt N/A 13.24 mg/kg dry weight N/A No EL06-SE06
Water Surface Water Uranium 0.50 µg/L 0.52 µg/L 15 µg/L No EL06-W06
Water Surface Water pH 7.5 7.5 6.5-9.0 No EL06-W06
Water Surface Water Copper 0.91 µg/L 0.71 µg/L 2 - 4 µg/L No EL06-W06
Water Surface Water Lead <0.1 µg/L 0.04 µg/L 1 - 7 µg/L No EL06-W06
Water Surface Water Nickel 0.53 µg/L 3.45 µg/L 25 - 150 µg/L No EL06-W06
Water Surface Water Zinc 2.76 µg/L 2.11 µg/L 30 µg/L No EL06-W06
Water Surface Water Iron 44.77 µg/L 10.8 µg/L 300 µg/L No EL06-W06
Water Surface Water Arsenic 0.16 µg/L 0.19 µg/L 5 µg/L No EL06-W06
Water Surface Water Total Dissolved Solids 46.4 mg/L N/A 500 mg/L No EL06-W06
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL06-W06
Water Surface Water Selenium <0.1 µg/L 0.06 µg/L 1 µg/L No EL06-W06
Water Surface Water Molybdenum <0.1 µg/L 0.09 µg/L 73 µg/L No EL06-W06
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL06-W06
Water Surface Water Total Organic Carbon 4.77 mg/L N/A N/A No EL06-W06
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL06-W06
Water Surface Water Total Suspended Solids 0.1 mg/L N/A N/A No EL06-W06
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL06-W06
Water Surface Water Chloride 10.57 mg/L N/A 250 mg/L No EL06-W06
Water Surface Water Cobalt <0.1 µg/L 0.25 µg/L N/A No EL06-W06
Water Surface Water Nitrite + Nitrate 0.41 mg/L N/A 13 mg/L No EL06-W06
Sediment 0-5 cm Uranium 6.78 mg/kg dry weight N/A N/A No EL11-SE11
Sediment 0-5 cm Copper 25.11 mg/kg dry weight N/A 16 - 110 mg/kg dry weight No EL11-SE11
Sediment 0-5 cm Lead 17.49 mg/kg dry weight N/A 35 - 91.3 mg/kg dry weight No EL11-SE11
Sediment 0-5 cm Nickel 18.73 mg/kg dry weight N/A 16 - 75 mg/kg dry weight No EL11-SE11
Sediment 0-5 cm Zinc 25.53 mg/kg dry weight N/A 123 - 315 mg/kg dry weight No EL11-SE11
Sediment 0-5 cm Iron 19725 mg/kg dry weight N/A 20,000- 40,000 mg/kg dry weight No EL11-SE11
Sediment 0-5 cm Arsenic 2.13 mg/kg dry weight N/A 5.9 - 17 mg/kg dry weight No EL11-SE11
Sediment 0-5 cm Radium-226 55.9 Bq/kg dry weight N/A 4852 Bq/kg dry weight No EL11-SE11
Sediment 0-5 cm Selenium <0.1 mg/kg dry weight N/A N/A No EL11-SE11
Sediment 0-5 cm Molybdenum 0.21 mg/kg dry weight N/A N/A No EL11-SE11
Sediment 0-5 cm Cobalt 7.85 mg/kg dry weight N/A N/A No EL11-SE11
Water Surface Water Uranium 3.26 µg/L 1.12 µg/L 15 µg/L No EL11-W11
Water Surface Water pH 7.4 7.2 6.5-9.0 No EL11-W11
Water Surface Water Copper 1.33 µg/L 0.17 µg/L 2 - 4 µg/L No EL11-W11
Water Surface Water Lead <0.1 µg/L 0.02 µg/L 1 - 7 µg/L No EL11-W11
Water Surface Water Nickel 0.72 µg/L 1.07 µg/L 25 - 150 µg/L No EL11-W11
Water Surface Water Zinc 2.44 µg/L 6.40 µg/L 30 µg/L No EL11-W11
Water Surface Water Iron 228.35 µg/L 97.4 µg/L 300 µg/L No EL11-W11
Water Surface Water Arsenic 0.30 µg/L 0.21 µg/L 5 µg/L No EL11-W11
Water Surface Water Total Dissolved Solids 165 mg/L N/A 500 mg/L No EL11-W11
Water Surface Water Radium-226 0.052 Bq/L <0.030 Bq/L 0.5 Bq/L No EL11-W11
Water Surface Water Selenium <0.1 µg/L 0.06 µg/L 1 µg/L No EL11-W11
Water Surface Water Molybdenum 0.30 µg/L 0.06 µg/L 73 µg/L No EL11-W11
Water Surface Water Fluoride 0.03 mg/L N/A 0.12 mg/L No EL11-W11
Water Surface Water Total Organic Carbon 9.99 mg/L N/A N/A No EL11-W11
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL11-W11
Water Surface Water Total Suspended Solids 5.0 mg/L N/A N/A No EL11-W11
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL11-W11
Water Surface Water Chloride 9.8 mg/L N/A 250 mg/L No EL11-W11
Water Surface Water Cobalt 0.21 µg/L 0.90 µg/L N/A No EL11-W11
Water Surface Water Nitrite + Nitrate <0.1 mg/L N/A 13 mg/L No EL11-W11
Sediment 0-5 cm Uranium 2.47 mg/kg dry weight 2.73 mg/kg dry weight N/A No EL12-SE12
Sediment 0-5 cm pH N/A 7.3 No EL12-SE12
Sediment 0-5 cm Copper 16.69 mg/kg dry weight 18.41 mg/kg dry weight 16 - 110 mg/kg dry weight No EL12-SE12
Sediment 0-5 cm Lead 22.81 mg/kg dry weight 25.41 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL12-SE12
Sediment 0-5 cm Nickel 16.4 mg/kg dry weight 17.44 mg/kg dry weight 16 - 75 mg/kg dry weight No EL12-SE12
Sediment 0-5 cm Zinc 28.81 mg/kg dry weight 33.87 mg/kg dry weight 123 - 315 mg/kg dry weight No EL12-SE12
Sediment 0-5 cm Iron 16671 mg/kg dry weight 16068 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL12-SE12
Sediment 0-5 cm Arsenic 1.61 mg/kg dry weight 1.07 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL12-SE12
Sediment 0-5 cm Radium-226 26.8 Bq/kg dry weight 35.4 Bq/kg 4852 Bq/kg dry weight No EL12-SE12
Sediment 0-5 cm Selenium <0.1 mg/kg dry weight 0.52 mg/kg dry weight N/A No EL12-SE12
Sediment 0-5 cm Molybdenum <0.1 mg/kg dry weight 0.17 mg/kg dry weight N/A No EL12-SE12
Sediment 0-5 cm Cobalt 7.18 mg/kg dry weight 9.21 mg/kg dry weight N/A No EL12-SE12
Water Surface Water Uranium 1.39 µg/L 0.67 µg/L 15 µg/L No EL12-W12
Water Surface Water pH 8 8.6 6.5-9.0 No EL12-W12
Water Surface Water Copper 1.16 µg/L 1.47 µg/L 2 - 4 µg/L No EL12-W12
Water Surface Water Lead 0.15 µg/L 0.04 µg/L 1 - 7 µg/L No EL12-W12
Water Surface Water Nickel 0.88 µg/L 0.88 µg/L 25 - 150 µg/L No EL12-W12
Water Surface Water Zinc 2.06 µg/L <0.11 µg/L 30 µg/L No EL12-W12
Water Surface Water Iron 140.01 µg/L 13.5 µg/L 300 µg/L No EL12-W12
Water Surface Water Arsenic 0.21 µg/L 0.23 µg/L 5 µg/L No EL12-W12
Water Surface Water Total Dissolved Solids 219 mg/L N/A 500 mg/L No EL12-W12
Water Surface Water Radium-226 <0.03 Bq/L <0.030 Bq/L 0.5 Bq/L No EL12-W12
Water Surface Water Selenium <0.1 µg/L 0.06 µg/L 1 µg/L No EL12-W12
Water Surface Water Molybdenum 0.20 µg/L 0.20 µg/L 73 µg/L No EL12-W12
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL12-W12
Water Surface Water Total Organic Carbon 6.02 mg/L N/A N/A No EL12-W12
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL12-W12
Water Surface Water Total Suspended Solids 1.6 mg/L N/A N/A No EL12-W12
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL12-W12
Water Surface Water Chloride 27.12 mg/L N/A 250 mg/L No EL12-W12
Water Surface Water Cobalt <0.1 µg/L 0.05 µg/L N/A No EL12-W12
Water Surface Water Nitrite + Nitrate <0.1 mg/L N/A 13 mg/L No EL12-W12
Sediment 0-5 cm Uranium 45.41 mg/kg dry weight 43.18 mg/kg dry weight N/A No EL13-SE13
Sediment 0-5 cm pH N/A 7.0 No EL13-SE13
Sediment 0-5 cm Copper 65.53 mg/kg dry weight 40.00 mg/kg dry weight 16 - 110 mg/kg dry weight No EL13-SE13
Sediment 0-5 cm Lead 37.82 mg/kg dry weight 32.18 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL13-SE13
Sediment 0-5 cm Nickel 51.35 mg/kg dry weight 34.26 mg/kg dry weight 16 - 75 mg/kg dry weight No EL13-SE13
Sediment 0-5 cm Zinc 179.7 mg/kg dry weight 109.7 mg/kg dry weight 123 - 315 mg/kg dry weight No EL13-SE13
Sediment 0-5 cm Iron 20335 mg/kg dry weight 19044 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL13-SE13
Sediment 0-5 cm Arsenic 9.47 mg/kg dry weight 8.38 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL13-SE13
Sediment 0-5 cm Radium-226 299.0 Bq/kg dry weight 284.0 Bq/kg 4852 Bq/kg dry weight No EL13-SE13
Sediment 0-5 cm Selenium 0.69 mg/kg dry weight 1.02 mg/kg dry weight N/A No EL13-SE13
Sediment 0-5 cm Molybdenum 1.27 mg/kg dry weight 0.74 mg/kg dry weight N/A No EL13-SE13
Sediment 0-5 cm Cobalt 71.52 mg/kg dry weight 39.50 mg/kg dry weight N/A No EL13-SE13
Water Surface Water Uranium 0.32 µg/L 0.82 µg/L 15 µg/L No EL13-W13
Water Surface Water pH 8.1 7.1 6.5-9.0 No EL13-W13
Water Surface Water Copper 1.65 µg/L 1.40 µg/L 2 - 4 µg/L No EL13-W13
Water Surface Water Lead <0.1 µg/L 0.06 µg/L 1 - 7 µg/L No EL13-W13
Water Surface Water Nickel 1.25 µg/L 1.13 µg/L 25 - 150 µg/L No EL13-W13
Water Surface Water Zinc 2.51 µg/L <0.11 µg/L 30 µg/L No EL13-W13
Water Surface Water Iron 27.90 µg/L 264 µg/L 300 µg/L No EL13-W13
Water Surface Water Arsenic 0.17 µg/L 0.24 µg/L 5 µg/L No EL13-W13
Water Surface Water Total Dissolved Solids 210 mg/L N/A 500 mg/L No EL13-W13
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL13-W13
Water Surface Water Selenium <0.1 µg/L 0.06 µg/L 1 µg/L No EL13-W13
Water Surface Water Molybdenum 0.13 µg/L 0.17 µg/L 73 µg/L No EL13-W13
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL13-W13
Water Surface Water Total Organic Carbon 6.31 mg/L N/A N/A No EL13-W13
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL13-W13
Water Surface Water Total Suspended Solids 1.6 mg/L N/A N/A No EL13-W13
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL13-W13
Water Surface Water Chloride 69.36 mg/L N/A 250 mg/L No EL13-W13
Water Surface Water Cobalt <0.1 µg/L 0.10 µg/L N/A No EL13-W13
Water Surface Water Nitrite + Nitrate 0.32 mg/L N/A 13 mg/L No EL13-W13
Water Surface Water Uranium 0.70 µg/L 0.59 µg/L 15 µg/L No EL14-W14
Water Surface Water pH 7.9 7.5 6.5-9.0 No EL14-W14
Water Surface Water Copper 0.93 µg/L 0.74 µg/L 2 - 4 µg/L No EL14-W14
Water Surface Water Lead 0.12 µg/L 0.03 µg/L 1 - 7 µg/L No EL14-W14
Water Surface Water Nickel 0.58 µg/L 0.59 µg/L 25 - 150 µg/L No EL14-W14
Water Surface Water Zinc 3.27 µg/L <0.11 µg/L 30 µg/L No EL14-W14
Water Surface Water Iron 64.12 µg/L 53.8 µg/L 300 µg/L No EL14-W14
Water Surface Water Arsenic 0.17 µg/L 0.21 µg/L 5 µg/L No EL14-W14
Water Surface Water Total Dissolved Solids 61.4 mg/L N/A 500 mg/L No EL14-W14
Water Surface Water Radium-226 <0.03 Bq/L <0.030 Bq/L 0.5 Bq/L No EL14-W14
Water Surface Water Selenium <0.1 µg/L 0.07 µg/L 1 µg/L No EL14-W14
Water Surface Water Molybdenum 0.12 µg/L 0.11 µg/L 73 µg/L No EL14-W14
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL14-W14
Water Surface Water Total Organic Carbon 4.73 mg/L N/A N/A No EL14-W14
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL14-W14
Water Surface Water Total Suspended Solids 0.4 mg/L N/A N/A No EL14-W14
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL14-W14
Water Surface Water Chloride 16.2 mg/L N/A 250 mg/L No EL14-W14
Water Surface Water Cobalt 0.10 µg/L 0.03 µg/L N/A No EL14-W14
Water Surface Water Nitrite + Nitrate 0.31 mg/L N/A 13 mg/L No EL14-W14
Sand 0-5 cm Uranium 1.49 mg/kg dry weight N/A N/A No EL15-SA15
Sand 0-5 cm Copper 11.58 mg/kg dry weight N/A 16 - 110 mg/kg dry weight No EL15-SA15
Sand 0-5 cm Lead 14.11 mg/kg dry weight N/A 35 - 91.3 mg/kg dry weight No EL15-SA15
Sand 0-5 cm Nickel 12.11 mg/kg dry weight N/A 16 - 75 mg/kg dry weight No EL15-SA15
Sand 0-5 cm Zinc 18.69 mg/kg dry weight N/A 123 - 315 mg/kg dry weight No EL15-SA15
Sand 0-5 cm Iron 12428 mg/kg dry weight N/A 20,000- 40,000 mg/kg dry weight No EL15-SA15
Sand 0-5 cm Arsenic 1.05 mg/kg dry weight N/A 5.9 - 17 mg/kg dry weight No EL15-SA15
Sand 0-5 cm Radium-226 17.2 Bq/kg dry weight N/A 4852 Bq/kg dry weight No EL15-SA15
Sand 0-5 cm Selenium <0.1 mg/kg dry weight N/A N/A No EL15-SA15
Sand 0-5 cm Molybdenum <0.1 mg/kg dry weight N/A N/A No EL15-SA15
Sand 0-5 cm Cobalt 4.57 mg/kg dry weight N/A N/A No EL15-SA15
Water Surface Water Uranium 0.70 µg/L 0.54 µg/L 15 µg/L No EL15-W15
Water Surface Water pH 7.8 7.3 6.5-9.0 No EL15-W15
Water Surface Water Copper 1.12 µg/L 0.79 µg/L 2 - 4 µg/L No EL15-W15
Water Surface Water Lead <0.1 µg/L 0.03 µg/L 1 - 7 µg/L No EL15-W15
Water Surface Water Nickel 0.68 µg/L 0.52 µg/L 25 - 150 µg/L No EL15-W15
Water Surface Water Zinc 3.02 µg/L <0.11 µg/L 30 µg/L No EL15-W15
Water Surface Water Iron 92.44 µg/L 18.1 µg/L 300 µg/L No EL15-W15
Water Surface Water Arsenic 0.18 µg/L 0.19 µg/L 5 µg/L No EL15-W15
Water Surface Water Total Dissolved Solids 59.8 mg/L N/A 500 mg/L No EL15-W15
Water Surface Water Radium-226 <0.03 Bq/L <0.030 Bq/L 0.5 Bq/L No EL15-W15
Water Surface Water Selenium <0.1 µg/L 0.06 µg/L 1 µg/L No EL15-W15
Water Surface Water Molybdenum 0.10 µg/L 0.11 µg/L 73 µg/L No EL15-W15
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL15-W15
Water Surface Water Total Organic Carbon 5.10 mg/L N/A N/A No EL15-W15
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL15-W15
Water Surface Water Total Suspended Solids 0.8 mg/L N/A N/A No EL15-W15
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL15-W15
Water Surface Water Chloride 15.61 mg/L N/A 250 mg/L No EL15-W15
Water Surface Water Cobalt 0.25 µg/L 0.01 µg/L N/A No EL15-W15
Water Surface Water Nitrite + Nitrate 0.34 mg/L N/A 13 mg/L No EL15-W15
Sediment 0-5 cm Uranium N/A 3.66 mg/kg dry weight N/A No EL16-SE16
Sediment 0-5 cm pH N/A 7.1 No EL16-SE16
Sediment 0-5 cm Copper N/A 16.46 mg/kg dry weight 16 - 110 mg/kg dry weight No EL16-SE16
Sediment 0-5 cm Lead N/A 15.70 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL16-SE16
Sediment 0-5 cm Nickel N/A 17.28 mg/kg dry weight 16 - 75 mg/kg dry weight No EL16-SE16
Sediment 0-5 cm Zinc N/A 29.14 mg/kg dry weight 123 - 315 mg/kg dry weight No EL16-SE16
Sediment 0-5 cm Iron N/A 18194 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL16-SE16
Sediment 0-5 cm Arsenic N/A 2.78 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL16-SE16
Sediment 0-5 cm Radium-226 N/A 41.1 Bq/kg 4852 Bq/kg dry weight No EL16-SE16
Sediment 0-5 cm Selenium N/A 0.48 mg/kg dry weight N/A No EL16-SE16
Sediment 0-5 cm Molybdenum N/A 0.09 mg/kg dry weight N/A No EL16-SE16
Sediment 0-5 cm Cobalt N/A 7.50 mg/kg dry weight N/A No EL16-SE16
Water Surface Water Uranium 0.34 µg/L 1.88 µg/L 15 µg/L No EL16-W16
Water Surface Water pH 7.7 7.0 6.5-9.0 No EL16-W16
Water Surface Water Copper 1.58 µg/L 0.51 µg/L 2 - 4 µg/L No EL16-W16
Water Surface Water Lead <0.1 µg/L 0.04 µg/L 1 - 7 µg/L No EL16-W16
Water Surface Water Nickel 1.14 µg/L 1.14 µg/L 25 - 150 µg/L No EL16-W16
Water Surface Water Zinc 2.35 µg/L <0.11 µg/L 30 µg/L No EL16-W16
Water Surface Water Iron 25.56 µg/L 440 µg/L 300 µg/L No EL16-W16
Water Surface Water Arsenic 0.17 µg/L 0.25 µg/L 5 µg/L No EL16-W16
Water Surface Water Total Dissolved Solids 108 mg/L N/A 500 mg/L No EL16-W16
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL16-W16
Water Surface Water Selenium <0.1 µg/L 0.07 µg/L 1 µg/L No EL16-W16
Water Surface Water Molybdenum 0.13 µg/L 0.05 µg/L 73 µg/L No EL16-W16
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL16-W16
Water Surface Water Total Organic Carbon 6.39 mg/L N/A N/A No EL16-W16
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL16-W16
Water Surface Water Total Suspended Solids 1.6 mg/L N/A N/A No EL16-W16
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL16-W16
Water Surface Water Chloride 71.18 mg/L N/A 250 mg/L No EL16-W16
Water Surface Water Cobalt <0.1 µg/L 0.17 µg/L N/A No EL16-W16
Water Surface Water Nitrite + Nitrate 0.37 mg/L N/A 13 mg/L No EL16-W16
Sediment 0-5 cm Uranium N/A 5.07 mg/kg dry weight N/A No EL17-SE17
Sediment 0-5 cm pH N/A 6.7 No EL17-SE17
Sediment 0-5 cm Copper N/A 13.51 mg/kg dry weight 16 - 110 mg/kg dry weight No EL17-SE17
Sediment 0-5 cm Lead N/A 13.24 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL17-SE17
Sediment 0-5 cm Nickel N/A 14.91 mg/kg dry weight 16 - 75 mg/kg dry weight No EL17-SE17
Sediment 0-5 cm Zinc N/A 25.56 mg/kg dry weight 123 - 315 mg/kg dry weight No EL17-SE17
Sediment 0-5 cm Iron N/A 34700 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL17-SE17
Sediment 0-5 cm Arsenic N/A 5.44 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL17-SE17
Sediment 0-5 cm Radium-226 N/A 42.1 Bq/kg 4852 Bq/kg dry weight No EL17-SE17
Sediment 0-5 cm Selenium N/A 0.56 mg/kg dry weight N/A No EL17-SE17
Sediment 0-5 cm Molybdenum N/A 0.29 mg/kg dry weight N/A No EL17-SE17
Sediment 0-5 cm Cobalt N/A 6.12 mg/kg dry weight N/A No EL17-SE17
Water Surface Water Uranium <0.1 µg/L 0.83 µg/L 15 µg/L No EL17-W17
Water Surface Water pH 7.7 6.7 µg/L 6.5-9.0 No EL17-W17
Water Surface Water Copper 1.86 µg/L 0.16 µg/L 2 - 4 µg/L No EL17-W17
Water Surface Water Lead <0.1 µg/L 0.01 µg/L 1 - 7 µg/L No EL17-W17
Water Surface Water Nickel 0.84 µg/L 0.51 µg/L 25 - 150 µg/L No EL17-W17
Water Surface Water Zinc 3.30 µg/L 0.41 µg/L 30 µg/L No EL17-W17
Water Surface Water Iron 146.03 µg/L 1762 µg/L 300 µg/L No EL17-W17
Water Surface Water Arsenic 0.34 µg/L 0.30 µg/L 5 µg/L No EL17-W17
Water Surface Water Total Dissolved Solids 25.2 mg/L N/A 500 mg/L No EL17-W17
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL17-W17
Water Surface Water Selenium <0.1 µg/L 0.04 µg/L 1 µg/L No EL17-W17
Water Surface Water Molybdenum <0.1 µg/L 0.05 µg/L 73 µg/L No EL17-W17
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL17-W17
Water Surface Water Total Organic Carbon 3.48 mg/L N/A N/A No EL17-W17
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL17-W17
Water Surface Water Total Suspended Solids 2.5 mg/L N/A N/A No EL17-W17
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL17-W17
Water Surface Water Chloride 0.84 mg/L N/A 250 mg/L No EL17-W17
Water Surface Water Cobalt 0.42 µg/L 1.03 µg/L N/A No EL17-W17
Water Surface Water Nitrite + Nitrate <0.1 mg/L N/A 13 mg/L No EL17-W17
Water Surface Water Uranium 1.54 µg/L N/A 15 µg/L No EL19-W19
Water Surface Water pH 7.5 N/A 6.5-9.0 No EL19-W19
Water Surface Water Copper 1.2 µg/L N/A 2 - 4 µg/L No EL19-W19
Water Surface Water Lead 0.10 µg/L N/A 1 - 7 µg/L No EL19-W19
Water Surface Water Nickel 0.44 µg/L N/A 25 - 150 µg/L No EL19-W19
Water Surface Water Zinc 2.43 µg/L N/A 30 µg/L No EL19-W19
Water Surface Water Iron 43.38 µg/L N/A 300 µg/L No EL19-W19
Water Surface Water Arsenic 0.18 µg/L N/A 5 µg/L No EL19-W19
Water Surface Water Total Dissolved Solids 57.6 mg/L N/A 500 mg/L No EL19-W19
Water Surface Water Radium-226 0.048 Bq/L N/A 0.5 Bq/L No EL19-W19
Water Surface Water Selenium 0.11 µg/L N/A 1 µg/L No EL19-W19
Water Surface Water Molybdenum 0.2 µg/L N/A 73 µg/L No EL19-W19
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL19-W19
Water Surface Water Total Organic Carbon 3.37 mg/L N/A N/A No EL19-W19
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL19-W19
Water Surface Water Total Suspended Solids 1.4 mg/L N/A N/A No EL19-W19
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL19-W19
Water Surface Water Chloride 3.42 mg/L N/A 250 mg/L No EL19-W19
Water Surface Water Cobalt 0.14 µg/L N/A N/A No EL19-W19
Water Surface Water Nitrite + Nitrate 0.28 mg/L N/A 13 mg/L No EL19-W19
Sediment 0-5 cm Uranium N/A 157.3 mg/kg dry weight N/A No EL20-SE20
Sediment 0-5 cm pH N/A 6.7 No EL20-SE20
Sediment 0-5 cm Copper N/A 25.49 mg/kg dry weight 16 - 110 mg/kg dry weight No EL20-SE20
Sediment 0-5 cm Lead N/A 40.52 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL20-SE20
Sediment 0-5 cm Nickel N/A 17.76 mg/kg dry weight 16 - 75 mg/kg dry weight No EL20-SE20
Sediment 0-5 cm Zinc N/A 36.58 mg/kg dry weight 123 - 315 mg/kg dry weight No EL20-SE20
Sediment 0-5 cm Iron N/A 18845 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL20-SE20
Sediment 0-5 cm Arsenic N/A 4.47 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL20-SE20
Sediment 0-5 cm Radium-226 N/A 748.0 Bq/kg 4852 Bq/kg dry weight No EL20-SE20
Sediment 0-5 cm Selenium N/A 1.55 mg/kg dry weight N/A No EL20-SE20
Sediment 0-5 cm Molybdenum N/A 5.94 mg/kg dry weight N/A No EL20-SE20
Sediment 0-5 cm Cobalt N/A 15.15 mg/kg dry weight N/A No EL20-SE20
Water Surface Water Uranium 0.80 µg/L 1.29 µg/L 15 µg/L No EL20-W20
Water Surface Water pH 7.5 7.4 6.5-9.0 No EL20-W20
Water Surface Water Copper 0.86 µg/L 0.58 µg/L 2 - 4 µg/L No EL20-W20
Water Surface Water Lead <0.1 µg/L 0.03 µg/L 1 - 7 µg/L No EL20-W20
Water Surface Water Nickel 0.30 µg/L 0.26 µg/L 25 - 150 µg/L No EL20-W20
Water Surface Water Zinc 3.39 µg/L <0.11 µg/L 30 µg/L No EL20-W20
Water Surface Water Iron 20.04 µg/L 30.7 µg/L 300 µg/L No EL20-W20
Water Surface Water Arsenic 0.17 µg/L 0.30 µg/L 5 µg/L No EL20-W20
Water Surface Water Total Dissolved Solids 31.7 mg/L N/A 500 mg/L No EL20-W20
Water Surface Water Radium-226 0.03 Bq/L 0.10 Bq/L 0.5 Bq/L No EL20-W20
Water Surface Water Selenium 0.11 µg/L 0.08 µg/L 1 µg/L No EL20-W20
Water Surface Water Molybdenum 0.1 µg/L 0.29 µg/L 73 µg/L No EL20-W20
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL20-W20
Water Surface Water Total Organic Carbon 3.07 mg/L N/A N/A No EL20-W20
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL20-W20
Water Surface Water Total Suspended Solids 0.4 mg/L N/A N/A No EL20-W20
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL20-W20
Water Surface Water Chloride 2.97 mg/L N/A 250 mg/L No EL20-W20
Water Surface Water Cobalt <0.1 µg/L 0.02 µg/L N/A No EL20-W20
Water Surface Water Nitrite + Nitrate 0.23 mg/L N/A 13 mg/L No EL20-W20
Sediment 0-5 cm Uranium N/A 6.38 mg/kg dry weight N/A No EL21-SE21
Sediment 0-5 cm pH N/A 6.3 No EL21-SE21
Sediment 0-5 cm Copper N/A 52.9 mg/kg dry weight 16 - 110 mg/kg dry weight No EL21-SE21
Sediment 0-5 cm Lead N/A 45.08 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL21-SE21
Sediment 0-5 cm Nickel N/A 18.58 mg/kg dry weight 16 - 75 mg/kg dry weight No EL21-SE21
Sediment 0-5 cm Zinc N/A 57.14 mg/kg dry weight 123 - 315 mg/kg dry weight No EL21-SE21
Sediment 0-5 cm Iron N/A 10896 mg/kg dry weight 20,000 - 40,000 mg/kg dry weight No EL21-SE21
Sediment 0-5 cm Arsenic N/A 3.16 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL21-SE21
Sediment 0-5 cm Radium-226 N/A 74.6 Bq/kg 4852 Bq/kg dry weight No EL21-SE21
Sediment 0-5 cm Selenium N/A 1.62 mg/kg dry weight N/A No EL21-SE21
Sediment 0-5 cm Molybdenum N/A 1.28 mg/kg dry weight N/A No EL21-SE21
Sediment 0-5 cm Cobalt N/A 4.58 mg/kg dry weight N/A No EL21-SE21
Water Surface Water Uranium <0.1 µg/L 0.11 µg/L 15 µg/L No EL21-W21
Water Surface Water pH 7.4 6.9 6.5-9.0 No EL21-W21
Water Surface Water Copper 1.61 µg/L 0.69 µg/L 2 - 4 µg/L No EL21-W21
Water Surface Water Lead 0.29 µg/L 0.12 µg/L 1 - 7 µg/L No EL21-W21
Water Surface Water Nickel 0.53 µg/L 0.42 µg/L 25 - 150 µg/L No EL21-W21
Water Surface Water Zinc 10.17 µg/L 0.91 µg/L 30 µg/L No EL21-W21
Water Surface Water Iron 67.82 µg/L 210 µg/L 300 µg/L No EL21-W21
Water Surface Water Arsenic 0.18 µg/L 0.27 µg/L 5 µg/L No EL21-W21
Water Surface Water Total Dissolved Solids 496 mg/L N/A 500 mg/L No EL21-W21
Water Surface Water Radium-226 <0.03 Bq/L <0.030 Bq/L 0.5 Bq/L No EL21-W21
Water Surface Water Selenium <0.1 µg/L 0.05 µg/L 1 µg/L No EL21-W21
Water Surface Water Molybdenum <0.1 µg/L 0.03 µg/L 73 µg/L No EL21-W21
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL21-W21
Water Surface Water Total Organic Carbon 5.62 mg/L N/A N/A No EL21-W21
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL21-W21
Water Surface Water Total Suspended Solids 1.9 mg/L N/A N/A No EL21-W21
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL21-W21
Water Surface Water Chloride 208.5 mg/L N/A 250 mg/L No EL21-W21
Water Surface Water Cobalt 0.19 µg/L 0.44 µg/L N/A No EL21-W21
Water Surface Water Nitrite + Nitrate <0.1 mg/L N/A 13 mg/L No EL21-W21
Sediment 0-5 cm Uranium N/A 11.39 mg/kg dry weight N/A No EL22-SE22
Sediment 0-5 cm pH N/A 6.4 No EL22-SE22
Sediment 0-5 cm Copper N/A 49.25 mg/kg dry weight 16 - 110 mg/kg dry weight No EL22-SE22
Sediment 0-5 cm Lead N/A 42.81 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL22-SE22
Sediment 0-5 cm Nickel N/A 51.60 mg/kg dry weight 16 - 75 mg/kg dry weight No EL22-SE22
Sediment 0-5 cm Zinc N/A 125.7 mg/kg dry weight 123 - 315 mg/kg dry weight No EL22-SE22
Sediment 0-5 cm Iron N/A 36036 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL22-SE22
Sediment 0-5 cm Arsenic N/A 4.77 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL22-SE22
Sediment 0-5 cm Radium-226 N/A 323.0 Bq/kg 4852 Bq/kg dry weight No EL22-SE22
Sediment 0-5 cm Selenium N/A 1.23 mg/kg dry weight N/A No EL22-SE22
Sediment 0-5 cm Molybdenum N/A 1.94 mg/kg dry weight N/A No EL22-SE22
Sediment 0-5 cm Cobalt N/A 26.53 mg/kg dry weight N/A No EL22-SE22
Water Surface Water Uranium 0.22 µg/L 0.26 µg/L 15 µg/L No EL22-W22
Water Surface Water pH 7.7 7.4 6.5-9.0 No EL22-W22
Water Surface Water Copper 0.81 µg/L 0.79 µg/L 2 - 4 µg/L No EL22-W22
Water Surface Water Lead <0.1 µg/L 0.03 µg/L 1 - 7 µg/L No EL22-W22
Water Surface Water Nickel 0.59 µg/L 1.22 µg/L 25 - 150 µg/L No EL22-W22
Water Surface Water Zinc 2.84 µg/L 0.42 µg/L 30 µg/L No EL22-W22
Water Surface Water Iron 29.54 µg/L 6.25 µg/L 300 µg/L No EL22-W22
Water Surface Water Arsenic 0.18 µg/L 0.20 µg/L 5 µg/L No EL22-W22
Water Surface Water Total Dissolved Solids 71.1 mg/L N/A 500 mg/L No EL22-W22
Water Surface Water Radium-226 <0.03 Bq/L <0.030 Bq/L 0.5 Bq/L No EL22-W22
Water Surface Water Selenium <0.1 µg/L 0.08 µg/L 1 µg/L No EL22-W22
Water Surface Water Molybdenum <0.1 µg/L 0.10 µg/L 73 µg/L No EL22-W22
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL22-W22
Water Surface Water Total Organic Carbon 5.12 mg/L N/A N/A No EL22-W22
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL22-W22
Water Surface Water Total Suspended Solids 0.4 mg/L N/A N/A No EL22-W22
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL22-W22
Water Surface Water Chloride 10.66 mg/L N/A 250 mg/L No EL22-W22
Water Surface Water Cobalt <0.1 µg/L 0.08 µg/L N/A No EL22-W22
Water Surface Water Nitrite + Nitrate 0.58 mg/L N/A 13 mg/L No EL22-W22
Sediment 0-5 cm Uranium 1.79 mg/kg dry weight 4.24 mg/kg dry weight N/A No EL24-SE24
Sediment 0-5 cm pH N/A 6.8 No EL24-SE24
Sediment 0-5 cm Copper 7.96 mg/kg dry weight 12.70 mg/kg dry weight 16 - 110 mg/kg dry weight No EL24-SE24
Sediment 0-5 cm Lead 13.06 mg/kg dry weight 12.99 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL24-SE24
Sediment 0-5 cm Nickel 15.58 mg/kg dry weight 18.78 mg/kg dry weight 16 - 75 mg/kg dry weight No EL24-SE24
Sediment 0-5 cm Zinc 20.9 mg/kg dry weight 38.60 mg/kg dry weight 123 - 315 mg/kg dry weight No EL24-SE24
Sediment 0-5 cm Iron 15814 mg/kg dry weight 19541 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL24-SE24
Sediment 0-5 cm Arsenic 1.01 mg/kg dry weight 1.24 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL24-SE24
Sediment 0-5 cm Radium-226 14.7 Bq/kg dry weight 39.0 Bq/kg 4852 Bq/kg dry weight No EL24-SE24
Sediment 0-5 cm Selenium <0.1 mg/kg dry weight 0.62 mg/kg dry weight N/A No EL24-SE24
Sediment 0-5 cm Molybdenum <0.1 mg/kg dry weight 0.24 mg/kg dry weight N/A No EL24-SE24
Sediment 0-5 cm Cobalt 8.34 mg/kg dry weight 8.71 mg/kg dry weight N/A No EL24-SE24
Water Surface Water Uranium 0.31 µg/L 0.44 µg/L 15 µg/L No EL24-W24
Water Surface Water pH 7.6 7.1 6.5-9.0 No EL24-W24
Water Surface Water Copper 0.82 µg/L 1.90 µg/L 2 - 4 µg/L No EL24-W24
Water Surface Water Lead <0.1 µg/L 0.10 µg/L 1 - 7 µg/L No EL24-W24
Water Surface Water Nickel 0.53 µg/L 2.35 µg/L 25 - 150 µg/L No EL24-W24
Water Surface Water Zinc 2.20 µg/L 3.18 µg/L 30 µg/L No EL24-W24
Water Surface Water Iron 49.16 µg/L 12.8 µg/L 300 µg/L No EL24-W24
Water Surface Water Arsenic 0.21 µg/L 0.24 µg/L 5 µg/L No EL24-W24
Water Surface Water Total Dissolved Solids 54.3 mg/L N/A 500 mg/L No EL24-W24
Water Surface Water Radium-226 <0.01 Bq/L <0.030 Bq/L 0.5 Bq/L No EL24-W24
Water Surface Water Selenium <0.1 µg/L 0.07 µg/L 1 µg/L No EL24-W24
Water Surface Water Molybdenum <0.1 µg/L 0.15 µg/L 73 µg/L No EL24-W24
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL24-W24
Water Surface Water Total Organic Carbon 4.92 mg/L N/A N/A No EL24-W24
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL24-W24
Water Surface Water Total Suspended Solids 0.8 mg/L N/A N/A No EL24-W24
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL24-W24
Water Surface Water Chloride 4.61 mg/L N/A 250 mg/L No EL24-W24
Water Surface Water Cobalt <0.1 µg/L 0.35 µg/L N/A No EL24-W24
Water Surface Water Nitrite + Nitrate 0.69 mg/L N/A 13 mg/L No EL24-W24
Sediment 0-5 cm Uranium 204.7 mg/kg dry weight 294.5 mg/kg dry weight N/A No EL25-SE25
Sediment 0-5 cm pH N/A 6.8 No EL25-SE25
Sediment 0-5 cm Copper 81.66 mg/kg dry weight 79.97 mg/kg dry weight 16 - 110 mg/kg dry weight No EL25-SE25
Sediment 0-5 cm Lead 30.01 mg/kg dry weight 37.75 mg/kg dry weight 35 - 91.3 mg/kg dry weight No EL25-SE25
Sediment 0-5 cm Nickel 33.78 mg/kg dry weight 35.00 mg/kg dry weight 16 - 75 mg/kg dry weight No EL25-SE25
Sediment 0-5 cm Zinc 353.5 mg/kg dry weight 367.7 mg/kg dry weight 123 - 315 mg/kg dry weight No EL25-SE25
Sediment 0-5 cm Iron 27690 mg/kg dry weight 28450 mg/kg dry weight 20,000- 40,000 mg/kg dry weight No EL25-SE25
Sediment 0-5 cm Arsenic 3.67 mg/kg dry weight 2.87 mg/kg dry weight 5.9 - 17 mg/kg dry weight No EL25-SE25
Sediment 0-5 cm Radium-226 656.0 Bq/kg dry weight 1120.0 Bq/kg 4852 Bq/kg dry weight No EL25-SE25
Sediment 0-5 cm Selenium 1.39 mg/kg dry weight 2.47 mg/kg dry weight N/A No EL25-SE25
Sediment 0-5 cm Molybdenum 1.24 mg/kg dry weight 2.31 mg/kg dry weight N/A No EL25-SE25
Sediment 0-5 cm Cobalt 21.31 mg/kg dry weight 19.99 mg/kg dry weight N/A No EL25-SE25
Water Surface Water Uranium 0.39 µg/L 0.29 µg/L 15 µg/L No EL25-W25
Water Surface Water pH 7.6 7.1 6.5-9.0 No EL25-W25
Water Surface Water Copper 1.06 µg/L 0.58 µg/L 2 - 4 µg/L No EL25-W25
Water Surface Water Lead <0.1 µg/L 0.02 µg/L 1 - 7 µg/L No EL25-W25
Water Surface Water Nickel 0.44 µg/L 0.28 µg/L 25 - 150 µg/L No EL25-W25
Water Surface Water Zinc 3.65 µg/L <0.11 µg/L 30 µg/L No EL25-W25
Water Surface Water Iron 42.69 µg/L 58.0 µg/L 300 µg/L No EL25-W25
Water Surface Water Arsenic 0.16 µg/L 0.20 µg/L 5 µg/L No EL25-W25
Water Surface Water Total Dissolved Solids 30.1 mg/L N/A 500 mg/L No EL25-W25
Water Surface Water Radium-226 <0.03 Bq/L <0.030 Bq/L 0.5 Bq/L No EL25-W25
Water Surface Water Selenium <0.1 µg/L 0.07 µg/L 1 µg/L No EL25-W25
Water Surface Water Molybdenum <0.1 µg/L 0.02 µg/L 73 µg/L No EL25-W25
Water Surface Water Fluoride <0.02 mg/L N/A 0.12 mg/L No EL25-W25
Water Surface Water Total Organic Carbon 4.52 mg/L N/A N/A No EL25-W25
Water Surface Water Phosphate <0.15 mg/L N/A N/A No EL25-W25
Water Surface Water Total Suspended Solids 1.8 mg/L N/A N/A No EL25-W25
Water Surface Water Ammonia <0.1 mg/L N/A 0.3 mg/L No EL25-W25
Water Surface Water Chloride 1.55 mg/L N/A 250 mg/L No EL25-W25
Water Surface Water Cobalt <0.1 µg/L 0.01 µg/L N/A No EL25-W25
Water Surface Water Nitrite + Nitrate <0.1 mg/L N/A 13 mg/L No EL25-W25

1 The < symbol indicates that a result is below the provided laboratory analytical detection limit.

2 N/A – not available

Background

Under the Nuclear Safety and Control Act, licensees of nuclear facilities are required to implement an environmental monitoring program (EMP) to demonstrate that the public and the environment are protected from emissions related to the facility's nuclear activities. The results of these monitoring programs are submitted to the CNSC to ensure compliance with the  applicable guidelines and limits, as set out in the regulations that govern Canada's nuclear industry.

The CNSC has implemented its IEMP to verify that the public and the environment around licensed nuclear facilities are protected. The IEMP is separate from, but complementary to, the CNSC's ongoing compliance verification program. The IEMP involves taking samples from public areas around the facilities, and measuring and analyzing the level of radioactive and hazardous substances in those samples. CNSC staff collect the samples and send them to the CNSC's state-of-the-art laboratory for testing and analysis. Since the IEMP was implemented, areas outside the perimeter of the Elliot Lake historical sites were sampled in 2015 and 2018.

2015 and 2018 results

The 2015 and 2018 IEMP sampling plans for the Elliot Lake historical mine sites focused on both radioactive and hazardous substances. A site-specific sampling plan was developed based on the licensee’s approved environmental monitoring program, CSA Group standards and the CNSC’s regulatory experience with the sites. In 2015 and 2018, samples were collected in publicly accessible areas outside the perimeter of the Elliot Lake historical mine sites, including samples of water and sediment. View detailed sampling data.

The concentrations of radioactive and hazardous contaminants in the water samples were all below guidelines. At two sediment sampling locations, heavy metal concentrations exceeded the sediment quality guideline issued by the Canadian Council of Ministers of the Environment (CCME), but remained below the CCME’s probable effect level and below the severe effect level established in Ontario’s Provincial Sediment Quality Guidelines. Although finding elevated heavy metal concentrations in sediment is common near sites of historical industrial activities, CNSC staff will continue to ensure these locations are monitored.  The levels of heavy metals in the water samples taken at these locations were below those set out in the water quality guidelines, indicating that the public and the environment remain protected.

Focus on health

The CNSC also conducts studies and reviews third-party research to assess the health of the public near nuclear facilities. For example, the CNSC funded a study conducted by Cancer Care Ontario to examine the risk of lung cancer mortality among miners who worked at the Elliot Lake, Bancroft and Agnew historical mine sites from 1954 to 1996. The study concluded that in general, for all causes of death, male mine workers were healthier than the general male population, and their health was similar to that of the general male population, considering all causes of cancer death. However, uranium miners did have an excess lung cancer than the general male population, due to working in conditions prior to radon protection measures. As radon exposure increases, the likelihood of developing lung cancer increases. Ontario miners also had higher rates of silicosis, from exposure to ore with high silica content.

Find out more about the health of past miners, including those from Elliot Lake mines, in the Ontario Uranium Miners Cohort Study Report.

CNSC staff have also reviewed the Algoma Public Health Unit’s community health profile which includes the Elliot Lake region and found that disease rates were comparable to those in other regions of northeastern Ontario where there are no nuclear facilities. 

CNSC staff collecting water samples near an Elliot Lake historical mine site in 2018.

Conclusions

The IEMP results from 2015 and 2018 indicate that the public and the environment in the vicinity of the Elliot Lake historical mine sites are protected and that there are no expected health impacts. These results are consistent with the results submitted by Rio Algom Limited, demonstrating that the licensee's EMP protects the health and safety of people and the environment.

To obtain the full technical IEMP report, contact us at cnsc.info.ccsn@cnsc-ccsn.gc.ca or call 613-995-5894 or 1-800-668-5284 (in Canada). Please provide the name of the facility and the report year.

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