what is a permit required confined space

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# §5157. Permit-Required Confined Spaces, Appendix C - Examples of Permit-required Confined Space Programs. (cont.) ## A. ENTRY WITHOUT PERMIT/ATTENDANT (cont.) dangerous air contamination or engulfment. Not all laterals to sewers or storm drains require blocking. However, where experience or knowledge of industrial use indicates there is a reasonable potential for contamination of air or engulfment into a occupied sewer, then all affected laterals shall be blocked. If blocking and/or isolation requires entry into the space the provisions for entry into a permit-required confined space must be implemented. Surveillance. The surrounding area shall be surveyed to avoid hazards such as drifting vapors from the tanks, piping, or sewers. Testing. The atmosphere within the space will be tested to determine whether dangerous air contamination and/or oxygen deficiency exists. Detector tubes, alarm only type gas monitors and explosion meters are examples of equipment that may be used to test permit space atmospheres. Testing shall be performed by the LEAD WORKER who has successfully completed the Gas detector training for the monitors he will use. The minimum parameters to be monitored are oxygen deficiency, LFL, and hydrogen sulfide concentration. A written record of the pre-entry test results shall be made and kept at the work site for the duration of the job. The supervisor will certify in writing, based upon the results of the pre-entry testing, that all hazards have been eliminated. Affected employees shall be able to review the testing results. The most hazardous conditions shall govern when work is being performed in two adjoining, connecting spaces. Entry Procedures. If there are no non-atmospheric hazards present and if the pre-entry tests show there is no dangerous air contamination and/or oxygen deficiency within the space and there is no reason to believe that any is likely to develop, entry into and work within may proceed. Continuous testing of the atmosph…

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This information is provided free of charge by the Department of Industrial Relations from its web site at www.dir.ca.gov. These regulations are for the convenience of the user and no representation or warranty is made that the information is current or accurate. See full disclaimer at https://www.dir.ca.gov/od_pub/disclaimer.html. Subchapter 7. General Industry Safety Orders Group 16. Control of Hazardous Substances Article 108. Confined Spaces Return to index New query # §5157. Permit-Required Confined Spaces, Appendix C - Examples of Permit-required Confined Space Programs. Example 1. Workplace. Sewer entry. Potential hazards. The employees could be exposed to the following: Engulfment. Presence of toxic gases. Equal to or more than 10 ppm hydrogen sulfide as measured as an 8-hour time weighted average. If the presence of other toxic contaminants is suspected, specific monitoring programs will be developed. Presence of explosive flammable gases. Equal to or greater than 10% of the lower flammable limit (LFL). Oxygen Deficiency. A concentration of oxygen in the atmosphere equal to or less than 19.5% by volume. ## A. ENTRY WITHOUT PERMIT/ATTENDANT Certification. Confined spaces may be entered without the need for a written permit or attendant provided that the space can be maintained in a safe condition for entry by mechanical ventilation alone as provided in Section 5157(c)(5). All spaces shall be considered permit-required confined spaces until the pre-entry procedures demonstrate otherwise. Any employee required or permitted to pre-check or enter an enclosed/confined space shall have successfully completed, as a minimum, the training as required by the following sections of these procedures. A written copy of operating and rescue procedures as required by these procedures shall be at the work site for the duration of the job. The Confined Space Pre-Entry Check List must be completed by the LEAD WORKER before entry into a confined space. This list ver…

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# §5157. Permit-Required Confined Spaces, Appendix C - Examples of Permit-required Confined Space Programs. (cont.) ## B. ENTRY PERMIT REQUIRED (cont.) Space Ventilation. Mechanical ventilation systems, where applicable, shall be set at 100% outside air. Where possible, open additional manholes to increase air circulation. Use portable blowers to augment natural circulation if needed. After a suitable ventilating period, repeat the testing. Entry may not begin until the testing has demonstrated that the hazardous atmosphere has been eliminated. Entry Procedures. The following procedure shall be observed under any of the following conditions: - 1.) Testing demonstrates the existence of dangerous or deficient conditions and additional ventilation cannot reduce concentrations to safe levels; - 2.) The atmosphere tests as safe but unsafe conditions can reasonably be expected to develop; - 3.) It is not feasible to provide for ready exit from spaces equipped with automatic fire suppression systems and it is not practical or safe to deactivate such systems; or - 4.) An emergency exists and it is not feasible to wait for pre-entry procedures to take effect. - All personnel must be trained. A self contained breathing apparatus shall be worn by any person entering the space. At least one worker shall stand by the outside of the space ready to give assistance in case of emergency. The standby worker shall have a self contained breathing apparatus available for immediate use. There shall be at least one additional worker within sight or call of the standby worker. Continuous powered communications shall be maintained between the worker within the confined space and standby personnel. - If at any time there is any questionable action or non-movement by the worker inside, a verbal check will be made. If there is no response, the worker will be moved immediately. Exception: If the worker is disabled due to falling or impact, he/she shall not be removed from the confined …

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U.S. DEPARTMENT OF LABOR # Occupational Safety and Health Administration - Part Number: 1926 - Part Number - Title: Safety and Health Regulations for Construction - Subpart: 1926 Subpart AA - Subpart Title: Confined Spaces in Construction Standard - Number: - 1926.1204 - Title: Permit-required confined space program. - GPO Source: e-CFR Each entry employer must: 1926.1204(a) - Implement the measures necessary to prevent unauthorized entry; ## 1926.1204(b) Identify and evaluate the hazards of permit spaces before employees enter them; ## 1926.1204(c) Develop and implement the means, procedures, and practices necessary for safe permit space entry operations, including, but not limited to, the following: ## 1926.1204(c)(1) Specifying acceptable entry conditions; ## 1926.1204(c)(2) Providing each authorized entrant or that employee's authorized representative with the opportunity to observe any monitoring or testing of permit spaces; 1926.1204(c)(3) Submit Feedback

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# Occupational Safety and Health Administration (cont.) ## B. Entry Permit Required - Permits. Confined Space Entry Permit. All spaces shall be considered permit-required confined spaces until the pre-entry procedures demonstrate otherwise. Any employee required or permitted to pre-check or enter a permit-required confined space shall have successfully completed, as a minimum, the training as required by the following sections of these procedures. A written copy of operating and rescue procedures as required by these procedures shall be at the work site for the duration of the job. The Confined Space Entry Permit must be completed before approval can be given to enter a permit-required confined space. This permit verifies completion of items listed below. This permit shall be kept at the job site for the duration of the job. If circumstances cause an interruption in the work or a change in the alarm conditions for which entry was approved, a new Confined Space Entry Permit must be completed. - Control of atmospheric and engulfment hazards. - Surveillance. The surrounding area shall be surveyed to avoid hazards such as drifting vapors from tanks, piping or sewers. - Testing. The confined space atmosphere shall be tested to determine whether dangerous air contamination and/or oxygen deficiency exists. A direct reading gas monitor shall be used. Testing shall be performed by the SUPERVISOR who has successfully completed the gas detector training for the monitor he will use. The minimum parameters to be monitored are oxygen deficiency, LFL and hydrogen sulfide concentration. A written record of the pre- entry test results shall be made and kept at the work site for the duration of the job. Affected employees shall be able to review the testing results. The most hazardous conditions shall govern when work is being performed in two adjoining, connected spaces. - Space Ventilation. Mechanical ventilation systems, where applicable, shall be set at 100% outside air. Wh…

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# §5157. Permit-Required Confined Spaces, Appendix C - Examples of Permit-required Confined Space Programs. (cont.) ## B. ENTRY PERMIT REQUIRED (cont.) Slips and falls. Remove residual grease before entering cooker/dryer. Attendant. The supervisor shall be the attendant for employees entering cooker/dryers. Permit. The permit shall specify how isolation shall be done and any other preparations needed before making entry. This is especially important in parallel arrangements of cooker/dryers so that the entire operation need not be shut down to allow safe entry into one unit. Rescue. When necessary, the attendant shall call the fire department as previously arranged. Example 3. Workplace. Workplaces where tank cars, trucks, and trailers, dry bulk tanks and trailers, railroad tank cars, and similar portable tanks are fabricated or serviced. A. During fabrication. These tanks and dry-bulk carriers are entered repeatedly throughout the fabrication process. These products are not configured identically, but the manufacturing processes by which they are made are very similar. Sources of hazards. In addition to the mechanical hazards arising from the risks that an entrant would be injured due to contact with components of the tank or the tools being used, there is also the risk that a worker could be injured by breathing fumes from welding materials or mists or vapors from materials used to coat the tank interior. In addition, many of these vapors and mists are flammable, so the failure to properly ventilate a tank could lead to a fire or explosion. Control of hazards. Welding. Local exhaust ventilation shall be used to remove welding fumes once the tank or carrier is completed to the point that workers may enter and exit only through a manhole. (Follow the requirements of California Code of Regulations, Title 8, welding standards at all times.) Welding gas tanks may never be brought into a tank or carrier that is a permit entry confined space. Application of i…