In addition to sediments, other deleterious substances such as hydrocarbons used for equipment operation and maintenance, substances used for road maintenance (road salts, herbicides and pesticides), and chemicals and debris from construction or maintenance (paint, sandblasting residue) may cause direct egg or fish mortality, negatively affect fish health and development, or reduce food availability.
Les eaux d’infiltration, pompées de l’intérieur de la berme pendant les activités de construction, pourraient être polluées ou avoir des concentrations élevées de sédiments en suspension.