Wood preservation facilities, general recommendations: chapter A, table 16

Table 16. Recommended Design Features for Treated Wood Storage Areas (All Preservatives)

Objective: Minimize and control releases of contaminated surface waters from treated wood storage areas.

Design feature

Recommendations

Storage areas

Where applicable, fix or stabilise the preservative or dripping must be stopped prior to yard storage.
Store treated wood under roof or wrap and provide impermeable flooring where leaching may cause excessive runoff or ground contamination.
Elevate treated wood packages above the ground by placing them on supports (stringers) to avoid treated wood contact with runoff water. Stringers must be a minimum of 6 inches high for CEPA toxic preservatives. Lower stringers are possible if the storage ground is paved and well maintained (no excessive depressions and bumps, well plowed in winter) as this will minimize contact with runoff water.
Maintain minimum inventories of treated wood.
Segregate treated wood storage areas from untreated wood storage areas to minimize potential impacts to soil, groundwater or surface water.
Locate unsurfaced ground storage areas away from surface water bodies.
Routinely monitor contaminant levels in storage area runoff.
Evaluate options for storage area surfaces on the basis of factors such as groundwater, usage, probability of bleeding/leaching and expected levels of precipitation (large paved areas will result in large quantities of runoff waters but may be necessary if groundwater is used for drinking water supply).
Refers to acceptable solutions in Division B, Part 3 - Indoor and Outdoor Storage of the National Fire Code of Canada 2010.