Document 6R5R62NRNabJQgXo13qrjDBY1

--3-- standard to 500,000 Fibers per cubic meter oC air. In 1976, VilOSH recommended! lowering the standard to 100,000 fibers. ... _ NI0SH and OSHA. established an Asbestos Work. Group In the fall of 1979. Its charge was to review all health effects data since the 1976 NIOSH & recqmmended standard was transmitted to OSHA and to determine whether any i Kj'O''' .sflA V changes to that recommendation were warranted. Was there health . . vt'cr occurring at the level of the current standard? The Work Group Qjansiste^riif; four experts from NIOSH and three from OSHA. ... . ^Cv'' ~c\Q The' Work Group has completed its report and NIOSHf haJ^Jfo/> vi recommended that OSHA adopt the Work Group's fnd(ing|pk A capjsjof the report Is in your press kit. , X* 'sJP The Group reconfirmed that there Is naSjprafte eeDxcnpBujSfsururre level for asbestos. . vOs Xiw1 Although data suggest that lower exposuuitr^S?> res^iil^t\ih !lower risks of developing W cancer,'th^re' is no known level belojAwhlchvj|sbestos-related diseases do not c b- occur. k v' 's"t The Group reconfirmed , that all/commercial and several non-commercial . forms of asbestos cay^p^lseatffeA There has at times been debate over which types of asbestos^ (fUs^rs cat^s^ disease. The Group found strong evidence that ail forms arfvs1Wa^Sg^c''rvonu"`s,^^' 4' nc^u^:n2 chrysotile; crocidollte; and fibrous cmnmlngtonite-grmteJj.ce Including amosite, fibrous tremollte, fibrous actlnalite, and\^ibrous anthophyllite. The Work Group found no basis for 'Os regulating(one type o'f fiber and not another. r- .jrjfc^-iAhese two premises in mind, let me enumerate some of the specific findings of the Work Group: j t,t . . . . . .. . o Optical microscopy continues to be the most reliable and economically feasible method for determining airborne levels of -more- EAB 008570