Niagara River Sediment Study Phase 3
Golder Associates Ltd. 2390 Argentia Road Mississauga, Ontario, Canada L5N 5Z7 Telephone: (905) 567-4444 Fax: (905) 567-6561 REPORT ON NIAGARA RIVER AREA OF CONCERN CONTAMINATED SEDIMENT SITE ASSESSMENT PHASE III Submitted to: Niagara Peninsula Conservation Authority 250 Thorold Road West, 3rd Floor Welland, Ontario L3C 3W2 DISTRIBUTION: 10 Copies - NPCA 2 Copies - Golder Associates Ltd. May 2005 03-1112-059 OFFICES ACROSS NORTH AMERICA, SOUTH AMERICA, EUROPE, AFRICA, ASIA AND AUSTRALIA May 2005 - i - 03-1112-059 EXECUTIVE SUMMARY The Phase I/II study identified three areas within the Niagara Area of Concern (AOC) where contaminated sediment concerns warranted detailed assessment of potential impacts on biota: • Lyon’s Creek West, due to contamination of sediments and stream bank soils by arsenic, zinc and PCBs; • Welland River, where elevated levels of copper, chromium, nickel and PAHs occurred; and • Frenchman’s Creek due to cadmium and chromium in the southwest branch of the creek and dioxins and furans in the southeast branch. In addition, elevated levels of copper in the Welland River near Thompson’s Creek in 2003, and in earlier studies by Environment Canada in 1996, warranted additional investigation of sediments in Thompson’s Creek. Therefore, this site was included for sediment assessment and possible biological assessment in order to determine whether further consideration of remediation would be warranted. The basis of the Phase III investigation was the assessment of biological effects, since only where contaminants are resulting in adverse effects on biota would there be a likely benefit to the environment from remediation. These sites are the basis of the Phase III investigation that forms the subject of this report.
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