Comments The information summarized above leads to the conclusion that the case of pneumoconiosis reported by Dr.

I have suggested getting one complete unit equipped for respirable dust and lead analyses, plus two basic units which can be adapted by the Lab according to the attached paper to determine vinyl chloride exposures.

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.

This leads to the possibility--still in the future, however--of developing a neutralizing antihedy tc the Duffy positive antigen that would block in vasion by the malaria parasite.

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

Currently, M-500 exhausts at the loading rack level which leads to exposure problems under certain wind conditions.

Since the macrophages are relatively short lived, their breakdown in the alveoli can lead to digestion of the thin walls of the alveoli leading to emphysema, etc.

Originally thought to be caused by hand reactor cleaning, cases in lead operators and other non-cleaners now proves that AOL is caused Dy repeated exposure to low concentrations of vcm (50 ppmJ.

John Fox has reported that the only requirement is that a notice be placed on the doors leading into an area where a microwave oven is in use.

FDA-ers hope that the pilot test will lead to conclusions about random sampling of plants and products, and about the kinds of attention needed by specific segments of industry.

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.

Currently, M-500 exhausts at the loading rack level which leads to exposure problems under certain wind conditions.

/,,o ,0.9, y*y.- Personnel Exposure, ppm VCM Week Of Week Of r Lead Operator Utility Man Yard Man & Service Man 0,3 0.9, o,9,vT. 3.

Measurements of the general room air flow were also made during the sample period and indicated that air was flowing in from the paint mixing area and out through the door which leads to the warehouse storage area.

Louis ' i C 0NF I D ENT I A L "SUMMARY^ I 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- \X HONS 03V203 WATER_PCB-SDOOOO018136 -2- diphenyl, we were able to preclude the direct question "who are the main users of PCB1s and where are they' located?".