Language selection

Government of Canada / Gouvernement du Canada

Search

Wood preservation facilities, general recommendations: chapter A, table 10

Previous page 
Table of contents 
Next page

Table 10. Recommended Design Features for Chemical Delivery Areas

Delivery format: Bulk liquid (delivered by truck or rail tanker)
Objective: Provide an off-loading area that enhances spill prevention and containment.

Design feature Recommendations
National Fire Code of Canada 2010
  • For flammable and combustible liquids, refer to acceptable solutions in Division B, Subsection 4.1.6 - Spill Control and Drainage Systems, Section 4.7 - Bulk Plants, and Section 4.11 - Tank Vehicles.
  • Install acceptable provisions for electric bonding to prevent static as per the NFCC.
Off-loading pad
  • Provide an impervious pad that drains to a containment area.
  • Secondary containmentFootnote1 for pads is required.
  • Design to prevent settling or cracking of the pad.
  • All delivery and transfer equipment should be contained with curbs or dykes (e.g. piping and entire concentrate truck)
  • Ensure containment for a worst-event spill (e.g. 1 truck load).
Sump
  • Provide a tertiary containment for sumps (e.g. steel lining or other suitable materials or devices) in addition to the concrete containment and impermeable liner or coating.
  • Provide overflow protection if sump is not in containment area (e.g. install independent high-level alarms).
Surfaces
  • Seal surfaces to prevent leakage and make them easier to clean.
Joints
  • Provide liquid-tight joints.
Drip control
  • Provide local drip catchment to minimize contamination of the containment system.
  • Provide for wash down of minor drips or spills with recovery of washwater (or infiltrating precipitation) for reuse.
Access
  • Locate off-loading area away from high yard traffic routes.
  • Restrict access to all unnecessary personnel during delivery.
Delivery system piping
  • Install permanent delivery systems with rigid, accessible, visible delivery lines (not buried).
  • Protect delivery systems from mechanical damage.
  • Provide mechanically secure connections between the tanker and delivery hook-up point.
  • Flexible hosing used for Tank car/truck unloading requires shielding.
  • Clearly identify all delivery lines.
  • Use top delivery to concentrate storage tanks.
Backflow prevention
  • Install check valve on delivery lines.
  • Install backflow preventer on the water lines into facility prior to any process water connection lines.
Security
  • Install locking valves on delivery lines.
  • Proper lighting should be provided throughout the facility to ensure a secure, free movement of personnel and to carry out proper inspections.
Overflow prevention
  • Provide maximum visibility of the delivery system from the point of off-loading.
  • Use audible alarms to detect tank overflow during delivery.
Emergency response
  • Provide accessible storage for spill-response equipment, absorbent and personal protection equipment.
  • Provide appropriate measures for fire detection and suppression, as well as for rapid, effective fire control with containment of liquid firefighting residues and treatment to required limits before discharge.
  • Provide appropriate signalization of fire control equipment.
  • Install a telephone or other voice communication system and manual alarm switch near the off-loading area.

Delivery format: Containerized liquid(drums)
Objective: Provide an off-loading area that enhances spill prevention and containment.

Design feature Recommendations
National Fire Code of Canada 2010
  • For flammable and combustible liquids, refers to acceptable solutions in Division B, Subsection 4.1.6 - Spill Control and Drainage Systems,
Off-loading pad/shelter
  • Provide an off-loading area near the storage area.
Containment
  • Ensure containment for a worst-event spill (e.g. 4 drums or 1 pallet load).
Surfaces
  • Provide a sealed surface; can be considered as a secondary containment for pad requirement.
  • Provide for containment with smooth surfaces for easy cleanup.
Container handling
  • Design for safe manipulation of containers.
Access
  • Locate off-loading area away from high yard traffic routes.
  • Restrict access to all unnecessary personnel during delivery.
Emergency response
  • Provide accessible storage for spill-response equipment, absorbent and personal protection equipment.
  • Provide appropriate measures for fire detection and suppression, as well as for rapid, effective fire control with containment of liquid firefighting residues and treatment to required limits before discharge.
  • Provide appropriate signalization of fire control equipment.
  • Install a telephone or other voice communication system and manual alarm switch near the off-loading area.

Delivery format: Bulk Solid (bags, containers for flakes or solid blocks)
Objective: Provide an off-loading area that promotes spill prevention and provides containment for and facilitates cleanup of spilled material

Design feature Recommendations
National Fire Code of Canada 2010
  • For flammable and combustible solid, refers to acceptable solutions in Division B, Subsection 4.1.6 - Spill Control and Drainage Systems,
Off-loading area/shelter
  • Provide a dry, paved/concrete off-loading area with protection from the weather, preferably near the storage area.
Containment
  • Provide for containment of a worst event spill of solids chemical (e.g. from dropped pallet load).
Area cleanup
  • Provide a vacuum cleaner system (with proper filtered exhaust) for cleanup of solids spilled during unloading and transfer operations
Previous page 
Table of contents 
Next page

Page details

2017-09-10