1. School of Resource and Environmental Management, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6, Contaminant Sciences, Institute of Ocean Sciences, Fisheries and Oceans Canada (DFO), 9860 West Saanich Road, Sidney, British Columbia, Canada, V8L 4B2, AXYS Analytical Services Ltd, 2045 Mills Road, Sidney BC Canada, V8L 5X2