Sources of ignition: Fires, open flames and similar sources of ignition shall be eliminated from the space under fumigation or thermal insecticidal fogging. Heating, where needed, shall be of an approved type.
Electricity: The structure’s electrical service shall be disconnected and locked out at the main service disconnect during fumigation or thermal insecticidal fogging operations.
Exception: Circulating fans that have been specifically designed for utilization in hazardous atmospheres and installed in accordance with the Oregon Electrical Specialty Code.
Warning signs: Approved warning signs indicating the danger, type of chemical involved and necessary precautions shall be posted on all doors and entrances to the premises. Requirements for notices include the following:Printed in red ink on a white background
Letters in the headlines shall be at least 2 inches in height
Date and time of the operation
Name and address of the person in charge
Warning stating that the occupied premises shall be vacated at least 1 hour before the operation begins and shall not be reentered until the danger signs have been removed by the proper authorities.Breathing apparatus: Persons engaged in the business of fumigation or thermal insecticidal fogging shall maintain and have available approved protective breathing apparatus.
Watch personnel: During the period fumigation is in progress, except when fumigation is conducted in a gas-tight vault or tank, a capable, alert watcher shall remain on duty at the entrance or entrances to the enclosed fumigated space until after the fumigation is completed and the premises properly ventilated and safe for occupancy. Sufficient watchers shall be provided to prevent persons from entering the enclosed space under fumigation without being observed.
Thermal insecticidal fogging liquids: Thermal insecticidal fogging liquids with a flash point below 100ºF (38ºC) shall not be utilized.
Sealing of buildings: Paper and other similar materials that do not meet the flame propagation performance criteria of NFPA 701 shall not be used to wrap or cover a building in excess of that required for the sealing of cracks, casements and similar openings.
Venting and cleanup: At the end of the exposure period, fumigators shall safely and properly ventilate the premises and contents; properly dispose of fumigant containers, residues, debris and other materials used for such fumigation; and clear obstructions from gas-fired appliance vents.
Flammable fumigants restricted: The use of carbon disulfide and hydrogen cyanide shall be restricted to agricultural fumigation.