*Wf ETHYL CORPORATION W ESTERN REGION 1141 H U N T L E Y D R I V E L O S A N G E L E S 26, C A L I F O R N I A January 21, 1958 Dr.

Et hyl Gaso l ine Corporat ion Ch r y s l e r Bu il d in g 405Lexingt on Avenue Ne w Yo r k May 18, 1958.

December 18, 1952 Dr.

A June 30, 1959 Mr.

January, il, 1950 Dr.

E T H Y L C 0 B P 0 RA T I 0 It H ite y-Offlce Haroorandim ac: s* Bertaolemsw C, H.

Ic abl e a d d r es s w i ppo D EPA RTM EN T OF RESEA RCH O DEVELO PM EN T AZUSA, CA LI FO RN I A December 19, 1958 Robert A.

REPORT ON THE NATURE OF THE PARTICULATE MATTER PRESENT IN THE ATMOSPHERE IN A NUMBER OF AREAS WHERE CERAMIC BRAKE LININGS ARE PRODUCED This report describes the results of a general hygiene survey, and of an environmental investigation undertaken to determine the extent of the pollution of the atmosphere in certain parts of the plant of the Bendix Products Division, Bendix Aviation Corporation, South Bend, Indiana, vith dust produced in the manufacture of ceramic brake linings.

June 30, 1953 Mr.

Blind copies: Dr. & F.

ANDREW F LETCH ER, PRESIDENT K.

LEAD INDUSTRIES ASSOCIATION 420 Lexin gton Aven ue New York 17, N.

c 0 P T MA3SACHUS"'TTS GTKERAL HOSPITAL 30STCH Ut 0 O November 10 1955* Mr.

Octo b e r 2 9 ,. 1957 D r .

A p ril 15, 1958 M r, J. 3 .