Witherspoon Special Considerations: EPA is setting a standard for lead in the atmosphere.

I remark on this, not because this man is in danger, for he is not, but rather because (i) he has sustained somewhat more than the usual exposure to inorganic lead 'within recent weeks or months, or (2) he was engaged sometime ago in an occupation involving a considerable exposure to lead, or (3) the sample which yielded these two results (which check within the analytical error) was slightly contaminated with lead from external sources (perhaps a tube not as clean as it should have been).

LEAD INDUSTRIES ASSOCIATION, INC. ** MADtlON AVINUI .Nrw y o h k it . h v.

Sample 6 (duplicate analysis) was definitely contami nated with lead, and ip. our opinion would be unsuitable for use.

Tto laboratory la currently oaklm Initial tests oa a short serial of solution eoetlnrs tosed on Hypeloo cured with red lead, rao<luf freu kO parts per 100 at Hypalon to appraEtnately 100 parts cf rad lead.

Further exposure to excessive lead levels should be avoided.

This technique could readily be applied to animals in metabolic studies of lead, although lead-203 would probably be a better choice of isotope because of its shorter half-life.

Would one from Lead Industries A;sociaticn be timely in 1967?

Lead ic Smelting Co, St.'

The blood lead level shows that your exposure to lead in recent months has not been dangerous in degree.

CONOCO CHEMICALS - ABERDEEN PVC PLANT DOSIMETRY CARD (A) N2SAMPLE 037* Hazard: VCM ( Lead { ) Noise ( ) Name Department Job Clas 11Instrument NoA Time Start AM( ) PM Noise Cell No.

On the contrary, we have had him specifically examined for lead poisoning by other doctors on previous occasions with negative reports.

Witherspoon Special Considerations: EPA is setting a standard for lead in the atmosphere.

Please feel free to mark it'up "with any comments you care to make. ^ a m enclosing the entire section on Occupational Diseases but since you probably will not, w a n t to^ wade through-all. of t h i s , you yn.ll note that the, sections on Lead Poisoning run from page li+P to 152, and from 1P7 ^o 160* I would particularly like your opinion as to whether or not lead might be stored in the bones in sufficient quantity before pregnancy to give rise to an acute attack of lead poisoning later during pregnancy.

I wish to correct one point in your comments on the dangers involved in handling leaded gasoline.