Document dD9No6wNprx9xQqY3gonyb9M6

r ? Lit sT.VI LS GUViRNMENT m aitoraudum DEPARTMENT OF 11 EAI.TI 1. > m.'CATJON. AND WELFARE rttuc m. vLlit >LR\ict National Institute of Environmental Health Sciences P.0. Box 12233, Research Triangle Park, X.C. 277C9 Tf* Mr, Andrew nosey. Director b\te: September 24, 1969 Di.vi.siou cf Criteria and Standards Development, BOSH FROM : 0r> UousUs H. K> Lve Associate Director for Scientific Information and Comunication, NIEHS SLBJICT: Proposed criteria for asbestos 3. Thank you fur your kind words. That is one advantage of being the lazy type -- you pick out the essentials and throw the rest away so chat you will not have to read it again! 1 showed the croit methods to Drs. Payne and Flshbein. The latter could find no criticism of the analytical methodology. Dr. Payne suggested that the sec:ion on "principles of sampling" might be superfluous since experts would be taking the samples; but I am not so sure that that is always the case. Ills comments are attached for your information. It occurred to re, when 1 got to thinking about it, that perhaps the logic leading from observed effects up to a decision on vhne -levels to set is a bit weak. It is hard to tell without seeing the finished product, but I'- 1 am afraid chat one might get the impression that, in spite of all the discussiv>n on asbestos' and its effects, the recommended levels ware essentially picked out of thin air. lli l-- O 1 would like to see the argument developed somewhat along these lines: j a. The 12 fiber/ul level recommended by the British still seems to result iu seme asbestosis; b. It Is difficult to say just how low the count would have to be to reduce the risk of asbestosis to minimal proportions; THIS DOCUMENT WAS NOT A RECORD OF PPG INDUSTRIES, INC. DID NOT COME FROM IT'S FILES AND CANNOT BE AUTHENTICATED BY PPG INDUSTRIES, INC. ted, asbestos has carcinogenic low dosages would involve soma '.cretc evidence, it is deemed ..ili-wabl* concentrations just as' l jDJi jll ..i ; i >uch & Ayer paper indicates that average .ruhceuiratic. . ... il below the 12 iber/ml level are entirely ra.I cal; " h In the light of these considerations it is recommended that---- .r _______ i\ nr j\nn HUf UlMlNAtC WASH . COJT tiDUCTION moo ------------ :--LTL51A/---------------- 7"bb"o022-^-- 37S7 .