Methods for determining, measuring and evaluating maximum allowable concentrations of harmful substances in workplace air Jurisdiction Czechoslovakia - Czech Socialist Republic Year 1979 Published in Czech Original/other title [Czech] Metodické opatření ke stanovení, měření a hodnocení nejvyšších přípustných koncentrací škodlivin v pracovním ovzduší Source Avicenum, zdravotnické nakladetelství, Malostranské náměstí 28, Praha 5, Czechoslovakia, 1979. Vol.45. 24p. Price: Kcs.0.95. Descriptors [Primary] Czech Socialist Republic, Czechoslovakia, determination of exposure limits, harmful substances, threshold limit values, toxicity evaluation [Secondary] air sampling, determination in air, directive, respirable dust, synergism, toxic substances Subject category Chemical safety Abstract Instructions issued by the Chief Hygienist of the Czech Socialist Republic to supplement Directives No.46: regulations for industrial hygiene conditions in the working environment, section IV "maximum allowable concentrations of harmful substances in workplace air" (CIS 80-2070). Contents: required data for determining or revising maximum allowable concentrations; air sampling and evaluation of hazards due to the presence of chemical substances and dust in workplace air (definitions, scope, analysis methods, sampling plan, sampling procedures and sampling time, protocol, principles of evaluation); modification of maximum allowable concentrations of noxae in workplace atmosphere in the following cases: shift exceeding 8h, potentiation by simultaneous action of several noxae, arduous physical effort of exposed person. CIS No. 83-133 Database ID 39067