INTERNAL CORRESPONDENCE UNION CARBIDE CORPORATION 270 PARK AVENUE, NEW YORK, NEW YORK 10017 rofNom.j om,iob location Mr.

UNION CARBIDE AND ENVIRONMENTAL AFFAIRS James S.

The carcinogen 3 *. 4 benzpyrene is present in only small amounts in cigarette tar condensates (Hoffmann and Wyndcr, 1963) and this fact, together with the evidence from the gas works studies, lead s one to think that perhaps this compound has received too.much attention in the consideration of tire aetiology of lung cancer. . , Although pollution by coal smoke has declined during the last decades, contamination of the air by exhaust products from motor vehicles has increased and merits consideration as a factor in the pfoduction of lung cancer.

The presence of PCBs in the fly aslt can also lead to the existence of PCBs in gaseous emissions from incinerators; however, they are not detected in gaseous emissions from the incinerator available during this study.

The streams of air and vinyl chloride were combined at appropriate rates of flow by a glass Y-tube leading through further rubber tub ing to the animal chamber inlet, to deliver a continuing stream in the desired proportions.

The world pro duction of PVC in 1972 is estimated to have been about 16 000 million pounds, with the USA as a leading PVC producer (4300 million pounds).

Humble markets petroleum products on the West Coast under the trade mark ENCO, a name derived from the Company's slogan "America's Leading ENergy COmpany".

To be useful, an econ omic statement should be based on extensive study of demand factors and lead-lag relationships.

|MA, May 3, 1965 Vol 192, No 5 SCF-FA-5675 159 420 BENIGN ASBESTOS PLEURISY--EISENSTADT ly, extensive destruction of lung tissue leads to respiratory and cardiac failure.

PCB Metabolism in Kats Following Prolonged Exposure to Aroclor 1242 and Aroclor 1016 by Viulyn W.

Inhalation tests on animals indicate that maximum concentrations of chlorinated biphenyls as vapor which arc "safe" is 1.0 mg/m3 for the lower chlorinated biphenyls and 0.5 mg/m3 for the more highly chlorinated biphenyls (Huiidaro. 1964), Continuous or repeated skin contact with chlorinated biphenyl leads to a condition called "chloracnc" which has been reported repeatedly with industrial workers handling products containing chlorinated biphenyls (Mligs el al., 1953).

ence of men Is all tbat Is needed to lead a rational and prudent person to the crmciutlna that certain conditions of em tog eoo&rlbutlons of toe private and pub lic organiaaslons which are generally aooeptod a* preeminent to this 5dd PART 50-304--SAFETY AND HEALTH STANDARDS POR FEDERAL SUPPLY ployment ere Incompatible with the safety and health of employee*, no de fense is providtd by the statutory Among these are the publications at Amtricaa Btuulis^t AMOCAtioBt Stt* American Society of Mechanical Engi CONTRACTS "prima-facle evident*" rule merely be- neer*.

distributor leading manufacturermsanufacturersmanufacturers for PLUMBING -- HEATING -; INDUSTRIAL SUPPLIES SOLD TO SHIP TO Firestone Tire & Rubber Co.

The streams of air and vinyl chloride were combined at appropriate rates of flow by a glass Y-tube leading through further rubber tub ing to the animal chamber inlet, to deliver a continuing stream in the desired proportions.

It is the intention of the committee to recognize the differing govern mental and practical problems eje isting in the several states but to lead all of the states to take affir mative action with respect to all of. the various aspects of the highway, safety problem."