i MEMORANDUM DEPARTMENT of health, EDUCATION, AND we PUBLIC HEALTH SERVICE enon pm otscAsa contkoc mahomal iMrmnt pm occupational safety and meal The Assistant Secretary for Health Through: ES/PHS_________ - Director, OlC DATE: DEC 1 5 1976 < FROM : Director, National Institute for Occupational Safety and Health Evaluation, of Data on Health Effects of Asbestos Exposure and Revised Recommended Numerical Environmental Limits 11 i i > A ;i U 'i\I The National Institute for Occupational Safety and Health (NIOSH) reconmenc that occupational exposure to all types of asbestos be controlled so chat no worker will be exposed to an airborne concentration of asbescos In excess of 100,000 fibers over 5 inr in length per cubic meter on an 6-hour time-weighted average (TWA) basis.

.4 V* # /* VIMASCO.

March 13, 1373 Me.

A REPORT SCIENTIFIC EVALUATION OF THE REVIEW OF TIE ENVIRONMENTAL EFFECTS OF ASBESTOS BY AN AD HOC STUDY GROUP TO THE HAZARDOUS MATERIALS ADVISORY COMITTEE SCIENCE ADVISORY BOARD U.

FROM M.

' FDOM SiNKLE BADIN WORKS TO MR.

FROM THOMAS B.

tom FLORES ENVTP.ONMENTAL CONTROL ; J--' lW 1' < ' MR.

<D JUL i 3 1978 r' j ^ pc f'T*cp7,nftic / - 3-\ - ' r ^ ' - 3 - - ' -- I `"' '*^ i' 4.

'--ROM THOMAS B.

1 'll Recognizing Environmental Conditions And Pwk\ A HEALTH AND SAFETY NEWSLETTER EDITOR ...

THE MONTREAL STAR - March 20, 1975 Chief doctor says he tried -l Ho be human' By CLAUDE AltPfff The central figure in the current controversy surrounding health hazards faced by asbestos workers in Thelford Mines is a C7-ycar-oId doctor whose policy was "In dp as mnrh ynnd for the workers as pos-^ sible without harming them.1' Dr.

IM.A1 STIFF'S EXHIBIT K.W.Nalaon Vico President Environmental Affairs February 6# 1976 cr Docket Officer Docket H-033 U.S.

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Ij Asbestos Information Association/North America 22 East 40th Street New York.