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Significance and Use
4.1 Vapor inhalation is the primary hazard encountered in the use of chlorinated solvents. The greatest potential for over exposure to these solvent vapors occurs where the employee is exposed to the high concentrations of vapor that may be found in confined areas. The seriousness of this hazard is often underestimated by those performing this type of work.
4.2 This practice is designed for use by employers in developing their own specific standards for vessel or confined area entry.
4.3 Many of these areas are considered as permit-required confined spaces as defined by OSHA (29 CFR 1910.146). The determination of the applicability of these requirements is the responsibility of the user.
4.4 This practice represents the minimum requirements for entry into any confined area containing halogenated solvents.
4.5 This practice does not address all of the requirements contained in the OSHA confined spaces standard. Development and implementation of training programs, recordkeeping, and other additional requirements of the OSHA standard are the responsibility of the user.
1.1 This practice covers recognized procedures necessary to protect the health and safety of workers required to enter confined spaces. These procedures are particularly applicable to entry into the confined areas associated with the use of halogenated organic solvents.
1.2 Confined areas addressed in this practice include, but are not limited to: vapor degreasers, cold cleaning tanks, storage vessels, tank cars and trucks, van trailers, ships or barges, pits or sumps, and unventilated rooms.
1.3 This practice does not necessarily address entry into all confined spaces nor does it address the decision strategy involved in requiring such entry.
1.4 Although this practice describes specific safety steps to be taken for entry into confined spaces, it is not intended to preclude the use of any additional measures that may be deemed necessary for a particular situation.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Code of Federal RegulationsCFR 1910.146 U.S. Department of Labor, Occupational Safety and Health Standards, Permit-Required Confined Spaces
ICS Number Code 13.100 (Occupational safety. Industrial hygiene)
UNSPSC Code 12352101(Organic halogenated compounds)
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ASTM D4276-02(2020), Standard Practice for Confined Area Entry, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top