Call or Email us for a Quick, Fair Quote Honest Work. Fair Prices. For copies of WCB and Liability insurance, please email : [email protected] Safety. Oneclean Safe Work Practices We exceed WorkSafe BC Standards. WCB# 725234. Clearance Letter by Request. Oneclean is covered by a $5,000,000 Commercial Liability policy from Northbridge Insurance. C2018 Oneclean Building Maintenance Ltd. WorkSafe BC# 725234. Intact Insurance $5Million Liability.