This lead GE to seek understanding of the scope, reproducibility, reliability and validity of the analytical procedures used by various investigators who reported finding PCB In concentrations as low as parts per billion.

CMA is talcing the lead in reviewing and commenting on these criteria. 2. 5112 of the Clean Air Act.

Lead compounds, quartz, carbonate minerals, clays, halite (NaCl). graphite, micas and alpha-iron were also identified in vari ous samples.

Cuyler Hammond of the Na tional Cancer Society, a leading authority on cancer epidemi ology, responded similarly to the same question: "\ycl!

Congress has taker ward ecp\ pollution at meetings leading to n>attorna lh;Uia qpfne manner as DDT. qn<dhe^ steps to curb the most obvious oil spills.

/ INTEROFFICE TO Mr.

Uhrathin sections were cut. stained with aqueous uranyl nitrate and lead acetate, and examined with an AEI-OEC 6B electron microscope.

Our results seem to lead to routine and SCE -- are equall mutagenicity in vivo.

L-749 Manufacturing Chemists Association * MINUTES OF MEETING LABELS AND PRECAUTIONARY INFORMATION COMMITTEE June 14-15, 1973 Windsor Park Hotel Washington, D.

to. c. i/ Comments made by Glenn E.

Strangely enough, it was the industry's search for an answer to the cause of acroosteolysis that eventually lead to the discovery of the carcinogenic risk oT vinyl chloride.

Strangely enough, it was the industry's search for an answer to the cause of acroosteolysis that eventually lead to the discovery of the carcinogenic risk of vinyl chloride.

COFIFU FROM THE COLLECTIONS IN THE CENTER FOR AMERICAN iTHF.

R&S 136418 Vinyl Chloride Cytogenetics Dante ).

(The National Cancer Institute reports the leading causes of cancers today are diet, tobacco, and radiation in the form of sunshine and x-rays.)