• All debris and potential contaminants generated from construction of the structure will be properly sited and contained to prevent debris from entering the watercourse, and all debris will be properly disposed of off-site.
  
  
• All activity will be controlled so as to prevent entry of any petroleum products, debris or other potential contaminants/deleterious substances, in addition to sediment as outlined above, to any waterbody. No storage, maintenance or refueling of equipment will be conducted near any waterbody. A Spills Prevention and Response Plan will be developed by the Contractor and kept on site at all times.

4.2.9 Enhancement Measures Following Construction

• All of the areas disturbed during construction will be restored, stabilized and re-vegetated as soon as the works are completed to prevent migration of fine material to the watercourses during runoff events, as well as minimizing the opportunity for colonization of the area by non-native, invasive species.

• Only native plants, compatible with site conditions will be used. Detailed landscaping plans will be prepared during subsequent design phases.

• Specific attention will be directed at naturalized re-construction, stabilization, inspection and re-vegetation (where light is present) of all disturbed channel and bank transition zones, valley slopes and floodplains, to ensure there is no potential for erosion and to re-naturalize these areas.

• Temporary/biodegradable erosion control fabric or other passive means of providing temporary erosion control will be installed on the re-constructed bank zones, as well as on the disturbed embankment areas draining to the watercourses as required, to provide temporary protection until vegetative cover is fully re-established. All disturbed areas should be reseeded with appropriate native seed mixtures wherever feasible.

4.2.10 Site Inspection and Monitoring

• An environmental inspector experienced in working around watercourses will be responsible for inspecting the erosion and sediment control measures and identifying deficiencies.

• The inspector will also assess all of the other general mitigation measures to ensure they are implemented as intended.

• The inspector will ensure all environmental mitigation and design measures are properly installed/constructed and maintained, and appropriate contingency and response plans are in place and implemented if required.