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PROJECT NOTE WESTON SOLUTIONS, INC. To: Canadian Radium & Uranium Corp. Site File Date: June 5, 2014 W.O. No.: 20405.012.013.2222.00 From: Denise Breen, Weston Solutions, Inc. Subject: Determination of Significant Lead Concentrations in Sediment Samples References 1. New York State Department of Environmental Conservation. Technical Guidance for Screening Contaminated Sediments. March 1998. [45 pages] 2. U.S. Environmental Protection Agency (EPA) Office of Emergency Response. Establishing an Observed Release – Quick Reference Fact Sheet. Federal Register, Volume 55, No. 241. September 1995. [7 pages] 3. International Union of Pure and Applied Chemistry, Inorganic Chemistry Division Commission on Atomic Weights and Isotopic Abundances. Atomic Weights of Elements: Review 2000. 2003. [120 pages] WESTON personnel collected six sediment samples (including one environmental duplicate sample) from five locations along the surface water pathway of the Canadian Radium & Uranium Corp. (CRU) site in May 2014. The sediment samples were analyzed for Target Analyte List (TAL) Metals and Stable Lead Isotopes. 1. TAL Lead Interpretation: In order to quantify the significance for Lead, Thallium and Mercury the following was performed: 1. WESTON personnel tabulated all available TAL Metal data from the May 2014 Sediment Sampling event. 2. For each analyte of concern (Lead, Thallium, and Mercury), the highest background concentration was selected and then multiplied by three. This is the criteria to find the significance of site attributable release as per Hazard Ranking System guidelines. 3. One analytical lead result (2222-SD04) of 520 mg/kg (J) was qualified with an unknown bias. In accordance with US EPA document “Using Data to Document an Observed Release and Observed Contamination”, 2222-SD03 lead concentration was adjusted by dividing by the factor value for lead of 1.44 to equal 361 mg/kg. 4. Additionally, each lead result was then compared to the New York State Department of Environmental Conservation’s (NYSDEC) technical guidance for Screening Contaminated Sediments criteria of 110 ppm for severe effect level. WESTON personnel concluded that there are three release samples (2222-SD04, -SD03, and - SD06) which meet the HRS guideline criteria as an observed release of lead. Additionally, four Page 1 of 149 PROJECT NOTE WESTON SOLUTIONS, INC. release sample locations (2222-SD04, -SD03, -SD06, and -SD01) meet NYSDEC technical guidance for screening contaminated sediments criteria. There were no elevated concentrations of thallium or mercury which exceeded 3x the highest background concentrations within the May 2014 sediment sampling event. Complete validated analytical data, adjusted concentration for 2222-SD04 lead analyte, and significant analytical results, established in accordance with the aforementioned criteria, can be found on Table 1 of this Project Note. 2. Isotopic Lead Interpretation: In order to quantify the significance of the stable lead isotope analyses of Pb-204, Pb-206, Pb-207, and Pb-208, following was considered the relationship between mass percentages between all four lead analyses (Pb-204, Pb-206, Pb-207, and Pb-208) and the comparison to the numbers of natural abundance. Average natural abundance according to International Union of Pure and Applied Chemistry (IUPAC): 204 – 1.4% 206 – 24.1% 207 – 22.1% 208 – 52.4% For the sediment samples, all of the samples are slightly elevated (approximately 1.25% - 1.75%) for Pb-206 above the average natural abundance and slightly depressed for Pb-204, Pb-207, and Pb-208. This might suggest that the parent material is richer than average in U-238/Ra-226. However, this is the case for all samples, including background samples. The highest percentage of Pb-206 is from sample location 2222-SD05, which is closest to the site. This anomaly may be due to the closer proximity to the site, even though it is located upstream of the probable point of entry (PPE). This might indicate greater relative impact to this “background” location, but the numbers show greater absolute impact at the PPE and at 2222-SD03 (i.e., more discharge through the storm sewers and ditch than overland runoff across/under the RR tracks). Complete analytical data can be found on Table 2 of this Project Note. The stable lead isotope concentrations and mass percentages along with the TAL lead concentrations support the conclusion that there is an observed release to the perennial drainage ditch that is at least partially attributable to the site. Denise Breen Assistant Project Scientist Page 2 of 149 Canadian Radium Uranium Corp. site - May 2014 Table 1. Complete TAL Metal Results for Sediment Samples 3x the Maximum Maximum Location ID 2222-SD02 (Background) 2222-SD05 (Background) 2222-SD01 2222-SD03 2222-SD06 (Duplicate of -SD03) 2222-SD04 Background Background Report Report Report Report Report Report Result Qualifier Limit Unit Result Qualifier Limit Unit Result Qualifier Limit Unit Result Qualifier Limit Unit Result Qualifier Limit Unit Result Qualifier Limit Unit Aluminum 5000 240 mg/kg 4200 260 mg/kg 10000 270 mg/kg 11000 350 mg/kg 10000 310 mg/kg 9100 J 690 mg/kg 5000 15000 Antimony 3.7 UJ 12 mg/kg 4 UJ 13 mg/kg 4.1 UJ 13 mg/kg 5.7 J 18 mg/kg 5.3 J 15 mg/kg 11 UJ 35 mg/kg 4 12 Arsenic 2.8 U 12 mg/kg 3.1 U 13 mg/kg 4.2 J 13 mg/kg 5.7 J 18 mg/kg 5.6 J 15 mg/kg 26 J 35 mg/kg 3.1 9.3 Barium 41 J 60 mg/kg 16 J 65 mg/kg 150 J 66 mg/kg 100 J 89 mg/kg 99 J 77 mg/kg 100 J 170 mg/kg 41 123 Beryllium 0.89 U 6 mg/kg 0.97 U 6.5 mg/kg 1 U 6.6 mg/kg 1.3 U 8.9 mg/kg 1.2 U 7.7 mg/kg 2.6 UJ 17 mg/kg 0.97 2.91 Cadmium 0.4 U 6 mg/kg 0.44 U 6.5 mg/kg 0.8 U 6.6 mg/kg 1.2 J 8.9 mg/kg 2 J 7.7 mg/kg 3.5 J 17 mg/kg 0.44 1.32 Calcium 26000 3000 mg/kg 16000 3200 mg/kg 5200 3300 mg/kg 17000 J 4400 mg/kg 29000 J 3900 mg/kg 17000 J 8600 mg/kg 26000 78000 Chromium 26 12 mg/kg 18 13 mg/kg 44 13 mg/kg 610 18 mg/kg 510 15 mg/kg 70 J 35 mg/kg 26 78 Cobalt 8.3 J 60 mg/kg 9 J 65 mg/kg 10 J 66 mg/kg 16 J 89 mg/kg 18 J 77 mg/kg 19 J 170 mg/kg 9 27 Copper 42 30 mg/kg 38 32 mg/kg 41 33 mg/kg 140 44 mg/kg 180 39 mg/kg 210 J 86 mg/kg 42 126 Iron 12000 120 mg/kg 15000 130 mg/kg 16000 130 mg/kg 23000 180 mg/kg 22000 150 mg/kg 28000 J 350 mg/kg 15000 45000 Lead 71 12 mg/kg 42 13 mg/kg 120 13 mg/kg 290 18 mg/kg 390 15 mg/kg 520* J* 35 mg/kg 71 213 Magnesium 10000 1200 mg/kg 6500 1300 mg/kg 5000 1300 mg/kg 7900 1800 mg/kg 8500 1500 mg/kg 7000 J 3500 mg/kg 10000 30000 Manganese 150 12 mg/kg 130 13 mg/kg 220 13 mg/kg 300 18 mg/kg 260 15 mg/kg 320 J 35 mg/kg 150 450 Nickel 16 J 48 mg/kg 17 J 52 mg/kg 20 J 53 mg/kg 40 J 71 mg/kg 38 J 62 mg/kg 58 J 140 mg/kg 17 51 Potassium 1000 J 6000 mg/kg 940 U 6500 mg/kg 1100 J 6600 mg/kg 1800 J 8900 mg/kg 1600 J 7700 mg/kg 2500 UJ 17000 mg/kg 1000 3000 Selenium 2.5 U 18 mg/kg 2.7 U 19 mg/kg 2.7 U 20 mg/kg 3.7 U 27 mg/kg 3.2 U 23 mg/kg 7.1 UJ 52 mg/kg 2.7 8.1 Silver 0.83 U 12 mg/kg 0.91 U 13 mg/kg 0.93 U 13 mg/kg 1.2 U 18 mg/kg 1.1 U 15 mg/kg 2.4 UJ 35 mg/kg 0.91 2.73 Sodium 140 J 1200 mg/kg 110 J 1300 mg/kg 150 J 1300 mg/kg 180 J 1800 mg/kg 170 J 1500 mg/kg 900 J 3500 mg/kg 140 420 Thallium 2.3 U 24 mg/kg 2.5 U 26 mg/kg 2.5 U 27 mg/kg 3.4 U 35 mg/kg 2.9 U 31 mg/kg 6.6 UJ 69 mg/kg 2.5 7.5 Vanadium 14 J 60 mg/kg 13 J 65 mg/kg 24 J 66 mg/kg 33 J 89 mg/kg 31 J 77 mg/kg 23 J 170 mg/kg 14 42 Zinc 140 60 mg/kg 130 65 mg/kg 170 66 mg/kg 430 89 mg/kg 550 77 mg/kg 760 J 170 mg/kg 140 420 Mercury 0.043 J 0.05 mg/kg 0.11 0.038 mg/kg 0.097 0.041 mg/kg 0.18 0.061 mg/kg 0.24 0.056 mg/kg 0.045 J 0.1 mg/kg 0.11 0.33 Reference 42 p. 13 p. 17 p. 12 p. 14 p. 18 pp. 15-16 U = The substance or analyte was analyzed for, but no quantifiable concentration was found at or above the CRQL.
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