Na t io n a l Le a d Co mp a n y 1 1 I BROADWAY NEW YORK 6.

green bay, ms.

A &au 5Traiuii?

Monsanto ORGANIC chemicals division PUBLIC RELATIONS REPORT OCTOBER, 1969 H.

PROPOSAL FOR A HISTORICAL PROSPECTIVE MORTALITY STUDY Of POLYCHLORINATED BIPHENYL EXPOSED WORKERS BACKGROUND The polychlorinated biphenyl* (PCB'a) have attracted much attention since the late 1960's when technological developments in gas chromatography and mass spectrometry made the detection of PCB's at low levels in the environment possible.

PCB Found Type Amount Anal.

* r. r il < !

0 - /^i 9 m 'f Polychlorinated Biphenyls Another Long-Life Widespread Chemical in the Environment David B.

Monsanto AIRMAIL Montanto Company 800 N.

booi Stan Shaw DaoaUbar 7, 1967 Nr.

Ml HU DR.

INST.'

H.

Monsanto >N |N* ft i.

Monsanto ,* * >1 e. p,.