indeed, no customers for any grade of Aroclor were named for fear of leading the discussion into an area that would have been embarrassing vis-a-vis the NCR and Wiggins Teape position, even though in prior consult ation with the major fluids and plasticizer customers they had agreed to be named, if need be.

MOTOR LEAD WIRES cont.

It appears most likely at this point, that the VC Panel will be asked to continue their support although the above leads will be followed-up.

WEBSTER 2 SUMMARY mesothelioma cannot be accepted as an occupational Seventy consecutive patients suffering from mesothelioma of the pleura were referred to the National Research Institute for Occupational Diseases In only 1 case was it not possible to elicit a history of significant exposure to asbestos dust An occupational and environmental history must be taken by a knowledgeable person before it is possible to conclude that there has been no asbestos exposure disease since in so many cases the cause is unknown and presumably not related to asbestos exposure The need to obtain a clear picture of the association between asbestos exposure and mesothelioma has been stressed by Selikoff et al who recommend that research leading to clarification and resolution of the foregoing statistical uncertainty be treated as a matter of considerable concern To under- line this concern two recent articles have reported groups ~ S.

Although brake linings contain silica and lead and the effects of overexposure are correctly stated, we do not believe that ac the present time there is any evidence that would indicate that silica and lead are common hazards in brake relining operations.

TOXICOLOGY NIOSH/CDC will take the lead role in determining needs for experi mental animal toxicologic studies.

. #325 Sieve Alkalinity as Nao0 Acid Soluble Iron as Feo0o Arsenic as As ~ Lead an Pb Soluble Matter in N/2 HC1 Microbial Contamination Bacteria Count Fibrous Asbestos (Serpentine, t Aaiphibole) SPECIFICATION See below (l) Odorless or Very Slightly See below (2) T0o.o8?

It appears most likely at this point, that the VC Panel will be asked to continue their support although the above leads will be followed-up.

The overall objective of the NASA program is soundly based, that is, increased awareness leads to fewer injuries. 4.

It is required to allow a one month lead time between the appearance of a regulation in the Federal Register and the date that it takes effect so OSHA plans to have the permanent standard published by September 5, 1974.

The proportional mortality table does not lead to the same conclusion.

Ethylene dichloride also is used widely as a scavenging agent in tetraethyllead fuel additive compounds to prevent lead salts and lead oxide from deposition on engine cylinder walls.

O'Y Personnel Exposure, ppm VCM Week o Week Of Lead Operator Utility Man Yard Man & Service Man -- Office Staff: /. a.

Supply shortages, and lead-time for ordering and instal ling various types of equipment to reduce vinyl chloride concentrations in the workplace were addressed at length throughout the course of the Hearings.

` By leading the discussion away ;from sensitive areas, by prolonging the further exchange of analytical techniques, and by encouraging debate as to why the PCB residues commonly found in nature more closely resembled pentachloro- MON S \X 03V203 TOWOLDMONOQ46380 -2- diphenyl, we were able to preclude the direct question "who are the main userB of PCB1s and where are they' located?".