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

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 containment^Footnote1 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

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Date modified:: 2017-09-10

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

Table 10. Recommended Design Features for Chemical Delivery Areas

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