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Wood preservation facilities, general recommendations: chapter A, table 23

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Table 23. Recommended Practices for Handling Liquid & Solid Wastes and Sludge (All Preservatives)

Feature	Recommendations
Objective: Minimize and safely process wastes.
PPE	Operators should wear the correct PPE when processing wastes and sludge. Preservative PPE requirements should be followed as determined by the concentration and the state (liquid, solid, sludge) of the material and in accordance with label instructions. (Table 8).
Minimization	Appropriately condition wood prior to treatment. Avoid the introduction of debris, soil, snow, ice and other foreign matter from wood and trams into the treatment vessel. Keep the treatment solution clean and ensure that solution concentrations and component balances are in accordance with acceptable standards (CAN/CSA O80). Minimize the frequency of switching from one preservative to another in a single treatment vessel: Avoid mixing trams. Thoroughly clean vessels, ancillary piping, etc., and trams prior to a switch. Do not exceed the stipulated limitations of process parameters (e.g. temperature). Thoroughly clean protective equipment after use. Thoroughly empty and clean preservative containers (if applicable): Rinse drums thoroughly (triple rinsed) with water prior to disposal in designated sanitary landfills subject to approval by the regulatory agency. Steam cleaning for oil based pesticides. Follow provincial instructions for any additional cleaning requirements and for disposal. Ensure proper stabilization or fixation methods prior to storage in the open environment Return containers to suppliers or reuse sound containers for storage of wastes or make the empty container unsuitable for further use and dispose in accordance with provincial requirements. If the discharge of contaminated runoff is required, specific approvals must be obtained from the appropriate provincial or municipal environmental regulatory agency. Reuse/ recycle all rinse waters for work solution preparation (for water-borne formulations)
Collection	To be carried out by personnel trained in potential chemical hazards and appropriate handling methods. All personal hygiene and general precautions as outlined in Section 6 should be followed (Tables 6 and 8). Prescribed practice for vessel entry should be observed (see Tables 20 and 22). Any runoff, recuperated spills or liquid wastes generated at the site must be contained and reused as much as possible. Collect, drain (where appropriate) and place wastes and sludge into sealed drums.
Storage	The contained area should be on a paved or concrete sealed surface. Appropriate signs identifying the storage area should be posted.
Records / reporting	Label all drums to indicate contents (type of waste). Maintain an up-to-date inventory of containers, including their volumes and contents. Undertake all labelling, reporting and disposal activities in accordance with WHMISrequirements and applicable regulations (municipalities, provinces, federal).
Transportation	All labelling, records and reporting should be in compliance with the TDGRrequirements. Classify waste in accordance with the TDGR. Follow reporting obligations in case of a spill or emergency (Section 12). Follow all instructions as outlined in Section 11, Table 27.
Disposal	Always consult with the provincial regulatory agency to determine acceptable disposal Do not burn contaminated wastes (toxic gases may be formed). Do not use treated wood wastes as compost or mulch. Dispose of contaminated solid waste in sanitary landfills is subject to approval by the provincial regulatory agency. Contain and reuse contaminated firefighting water runoff as makeup for work solutions (to the greatest possible extent).

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2017-09-10

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