Hazardous Materials Hazmat Storage and Segregation Protocol
This standard operating procedure defines the requirements for receiving, classifying, storing, and segregating hazardous materials (hazmat) in industrial workplaces. It covers TDG / WHMIS 2015 class-based segregation, approved containment, ventilation, grounding, spill response, and daily inspection procedures to maintain compliance with WorkSafeBC and CSA Z432.
The purpose of this SOP is to eliminate the risk of fire, explosion, toxic gas release, and chemical burns caused by improper storage or incompatible segregation of hazardous materials. By following this protocol, operators ensure that every hazmat container — from 20 L pails of Class 3 flammable liquids to 200 L drums of Class 8 corrosives — is stored in an approved cabinet or secondary containment system, separated from incompatible classes by the distances or barriers required by TDG Part 3 and NFPA 30. This procedure also ensures that ventilation, bonding/grounding, and spill response equipment are in place and inspected daily, reducing the likelihood of a reportable release and keeping the facility within WorkSafeBC OHS guidelines.
This SOP applies to all personnel involved in receiving, handling, storing, and inspecting hazardous materials at industrial facilities, warehouses, and maintenance shops under Canadian jurisdiction. It covers all dangerous goods falling under TDG Classes 1 through 9 as defined by the Transportation of Dangerous Goods Regulations and WHMIS 2015 hazard categories. Excluded from this protocol are consumer-packaged products in original retail packaging (less than 5 L) that are used immediately and not stored in bulk, radioactive materials requiring a specific CNSC license, and compressed gas cylinders in active use (which follow a separate cylinder storage SOP).
- Lockout/Tagout all ventilation and transfer equipment before performing maintenance or cleaning inside a hazmat storage cabinet or containment area. Verify zero energy state and test LEL detector response before re-entry.
- Mandatory minimum PPE for all hazmat storage area access: chemical splash goggles, nitrile gloves (0.4 mm minimum), flame-resistant coveralls for Class 3 and Class 4 materials, and steel-toe rubber boots. Double-glove when handling Class 6.1 toxic or Class 8 corrosive materials.
- No single container larger than 205 L (45 gal) may be stored without a dedicated secondary containment tray rated for 110 % of the container volume. All spill response equipment must be visually inspected and certified on a monthly basis with a dated inspection tag. Any release exceeding 5 L must be reported to WorkSafeBC within 24 hours.
- The storage area ventilation system must be verified operational before any hazmat is moved into the space. If the mechanical ventilation fails, all activities must cease, the area must be evacuated, and a portable 500 CFM explosion-proof fan must be deployed immediately. Re-entry is prohibited until LEL < 10 % and gas levels are within OEL.
- WHMIS / GHS compliant safety data sheets (SDS) for all stored chemicals
- Approved hazmat storage cabinets (FM / ULC listed) for flammable, corrosive, and toxic classes
- Secondary containment spill trays or pallets rated for the largest container volume (110 % capacity)
- Class-compatible segregation barriers (non-combustible, acid-resistant, or gas-tight as appropriate)
- Continuous mechanical ventilation (minimum 6 air changes per hour) with LEL / gas detection interlocks
- Grounding and bonding equipment for Class 1 flammable liquid transfers (clamps, wire, ground rod)
- Spill response kit (universal, acidic, basic, solvent) located within 10 m of storage area
- Personal protective equipment: chemical splash goggles, nitrile gloves (0.4 mm), acid suit, safety boots
- SafeDesk digital inspection platform on a mobile device or tablet for daily checklist completion