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Document ID (ISN)32027
CIS number 79-1758
ISSN - Serial title National Safety News
Year 1979
Convention or series no.
Title Atmospheres in sub-surface structures and sewers.
Bibliographic information Data Sheet I-550-79, Revised 1979, National Safety Council, 444 North Michigan Avenue, Chicago. Chicago, USA, Apr. 1979, Vol.119, No.4, p.79-83. Illus.
Abstract This data sheet, which supersedes the edition abstracted under CIS 1738-1971 Gzx Hbid Jyuz (203), applies to cellars, sump pits, open tanks, as well as sewers, which are subject to various contaminants. After describing the types of dangerous vapours and gases (fuels, fermentation gases, combustion products, drainage gases) and the hazards (explosible, flammable or poisonous gases, suffocating vapours), it contains recommendations for testing (instruments for combustible gases, oxygen deficiency, carbon monoxide or hydrogen sulfide), periodic inspection of manholes and ventilation (forced draft is preferred). Reference is made to the relevant legislation on manhole entry requirements. French translation may be obtained from INRS, 30 rue Olivier-Noyer, 75680 Paris Cedex 14, France.
Descriptors (primary) USA; work in sewers; underground work; harmful substances
Descriptors (secondary) carbon monoxide; hydrogen sulfide; flammable gases; toxic gases; manholes; periodical checks; oxygen deficiency; legislation; translation; data sheet; ventilation
Document type F - Information notes, codes of practice, standards
Subject(s) Other industries and occupations
Broad subject area(s)
Browse category(ies) Confined spaces