Fumigations in vaults
 61. (0.1) In this section, “licensed engineering practitioner” means a person who holds a licence, limited licence or temporary licence under the Professional Engineers Act. O. Reg. 134/20, s. 27 (2). (1) The person responsible for a vault shall not cause or permit a fumigation performed by means of a fumigant gas to be performed in the vault unless the vault has been confirmed to be gas-tight by the report of a licensed engineering practitioner issued within the previous five years or, if any work has been done on the vault during the previous five years that could affect whether the vault is gas-tight, by the report of a licensed engineering practitioner issued since the work was done.  O. Reg. 63/09, s. 61 (1); O. Reg. 134/20, s. 27 (1). (2) The person responsible for a vault shall not cause or permit a fumigation to be performed in the vault if he or she is aware that the vault is not gas-tight.  O. Reg. 63/09, s. 61 (2). (3) Within 10 days after receiving a report mentioned in subsection (1), the person responsible for the vault shall submit to the Director a copy of the report.  O. Reg. 63/09, s. 61 (3). (4) An exterminator who performs a fumigation in a vault shall comply with the following rules: 1. Before the fumigation begins, the exterminator shall inspect the vault and not proceed with the fumigation unless he or she is satisfied that, i. the vault has been confirmed to be gas-tight by the report of a licensed engineering practitioner mentioned in subsection (1), ii. the vault is free of any obvious damage that would suggest that the vault is not gas-tight, and iii. the vault is equipped with, A. a sheet metal lining having soldered joints and covering the walls and ceilings, or any other lining that is equivalent in the opinion of the Director, B. a floor that is made of material impervious to fumigant gases, C. a gasket that is non-reactive to the fumigant gas, D. an exhaust fan that is, 1.  controlled by a switch from outside the vault, 2.  capable of performing 10 changes of air per hour, and 3.  capable of discharging exhaust gases into the outside atmosphere in a manner that ensures that the exhaust gases will not enter any door, window or opening, and E. a means of introducing gas from outside the vault. 2. The exterminator shall search the vault before the fumigation begins to ensure that the vault contains no person. 3. The exterminator shall post Sign A, referred to in the Table to subsection 1 (5), on the vault entrance at the beginning of the fumigation and shall ensure that the sign remains posted at all times during the fumigation. 4. The exterminator shall have adequate respiratory protection at all times during the fumigation. 5. The exterminator shall lock the door of the vault by means of an external lock before the fumigation begins, keep the door locked until the airing out phase of the fumigation begins, and keep the keys or other means of unlocking the door in his or her possession at all times during the fumigation. 6. The exterminator shall, if he or she determines during the fumigation that the vault is not gas-tight, take reasonable steps to temporarily seal the leaks and, within 24 hours after the fumigation is complete, give written notice of the presence of the leaks to the person responsible for the vault and to the Director. 7. The exterminator shall ensure that no person enters the vault until the fumigation is complete. 8. The exterminator shall be present at the vault during the airing out phase of the fumigation. 9. The exterminator shall perform tests at representative locations in the vault to determine whether the airing out phase of the fumigation is complete.  O. Reg. 63/09, s. 61 (4); O. Reg. 134/20, s. 27 (1).