Fresh air c9nfined space

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## Ventilation and purging - 53 (1) If the atmospheric testing under section 52 identifies that a hazardous atmosphere exists or is likely to exist in a confined space, an employer must ensure that the confined space is ventilated, purged or both before a worker enters the confined space. - 53 (2) If ventilating or purging a confined space is impractical or ineffective in eliminating a hazardous atmosphere, the employer must ensure that a worker who enters the confined space uses personal protective equipment appropriate for the conditions within the confined space. - 53 (3) If mechanical ventilation is needed to maintain a safe atmosphere in a confined space during the work process, an employer must ensure it is provided and operated as needed. - 53 (4) If mechanical ventilation is required to maintain a safe atmosphere in the confined space, the employer must ensure that - (a) the ventilation system incorporates a method of alerting workers to a failure of the system so that workers have sufficient time to safely leave the confined space, and - (b) all workers within the confined space have received training in the evacuation procedures to be used in the event of a ventilation system failure. - 53 (5) All workers must evacuate a confined space or use an alternative means of protection if a ventilation system fails. ## Inerting 54 (1) An employer must ensure that a confined space is inerted if it is not reasonably practicable to eliminate an explosive or flammable atmosphere within the confined space through another means. - 54 (2) If a confined space is inerted, an employer must ensure that - (a) every worker entering the confined space is equipped with supplied air respiratory protective equipment that complies with Part 18, - (b) all ignition sources are controlled, and - (c) the atmosphere within the confined space stays inerted while workers are inside. ## Emergency response - 55 (1) An employer must ensure that a worker does not enter or remain in a con…

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Division 2 AO 2-2017 Oregon Administrative Rules Oregon Occupational Safety and Health Division - (12) Specific ventilation requirements. If continuous forced-air ventilation is used, it must begin before entry is made and must be maintained long enough for the employer to be able to demonstrate that a safe atmosphere exists before employees are allowed to enter the work area. The forced-air ventilation must be so directed as to ventilate the immediate area where employees are present within the enclosed space and must continue until all employees leave the enclosed space. - (13) Air supply. The air supply for the continuous forced-air ventilation must be from a clean source and may not increase the hazards in the enclosed space. - (14) Open flames. If open flames are used in enclosed spaces, a test for flammable gases and vapors must be made immediately before the open flame device is used and at least once per hour while the device is used in the space. Testing must be conducted more frequently if conditions present in the enclosed space indicate that once per hour is insufficient to detect hazardous accumulations of flammable gases or vapors. Note to paragraph (14): See the definition of "hazardous atmosphere" for guidance in determining whether a specific concentration of a substance is hazardous. Note to [redacted phone] : Entries into enclosed spaces conducted in accordance with the requirements of [redacted phone] (4) through (11), Confined spaces, are considered as complying with [redacted phone] of Division 2/RR. Stat. Auth.: ORS 654.025(2) and 656.726(4) Stats. Implemented: ORS 654.001 through 654.295. Hist.: OR OSHA Admin. Order 3 2015, f. 10/9/15, ef. 1/1/16. - - ## [redacted phone] Excavations Excavation operations must comply with Division 3/P. Stat. Auth.: ORS 654.025(2) and 656.726(4) Stats. Implemented: ORS 654.001 through 654.295. Hist.: OR OSHA Admin. Order 3 2015, f. 10/9/15, ef. 1/1/16. - - ## [redacted phone] Personal protective eq…

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## 29 CFR 1910 (OSHA) - (F) The atmosphere within the space shall be periodically tested as necessary to ensure that the continuous forced air ventilation is preventing the accumulation of a hazardous atmosphere. Any employee who enters the space, or that employee's authorized representative, shall be provided with an opportunity to observe the periodic testing required by this paragraph. - (G) If a hazardous atmosphere is detected during entry: - ( 1 ) Each employee shall leave the space immediately; - ( 2 ) The space shall be evaluated to determine how the hazardous atmosphere developed; and - ( 3 ) Measures shall be implemented to protect employees from the hazardous atmosphere before any subsequent entry takes place. - (H) The employer shall verify that the space is safe for entry and that the pre-entry measures required by paragraph (c)(5)(ii) of this section have been taken, through a written certification that contains the date, the location of the space, and the signature of the person providing the certification. The certification shall be made before entry and shall be made available to each employee entering the space or to that employee's authorized representative . - (6) When there are changes in the use or configuration of a non-permit confined space that might increase the hazards to entrants, the employer shall reevaluate that space and, if necessary, reclassify it as a permit-required confined space. - (7) A space classified by the employer as a permit-required confined space may be reclassified as a non-permit confined space under the following procedures: - (i) If the permit space poses no actual or potential atmospheric hazards and if all hazards within the space are eliminated without entry into the space, the permit space may be reclassified as a non-permit confined space for as long as the non-atmospheric hazards remain eliminated. - (ii) If it is necessary to enter the permit space to eliminate hazards, such entry shall be performed under pa…