CLAIMED PRIVILEGED BY OCF SEQUENCE OF THE ACGIH TLV FOR ASBESTOS Year 1946 - 1961 1962 - 1967 1968 - 1969 1970 1971 Listing MINERAL DUSTS Asbestos - 5 mppcf MINERAL OUSTS Silicates (less than 11 crystalline silica) Asbestos - b mppcf MINERAL DUSTS SIlicates~Tless than 11 crystalline silica) **Asbestos - 5 mppcf **NOTICE OF INTENDED CHANGES Asbestos - 12 fibers/ml > 5 jj in length,J) or 2 mppcf1^ J) As determined by the membrane filter method at 430X phase contrast magnification.

ST085301 It' PLAINTIFF'S EXHIBIT DOW-1631 MANUAL OF ir'.'

3PT) ,Pebruary 23 1944 Mr.

3PT) ,Pebruary 23 1944 Mr.

FILE NAME: Trade Publications (TR) DATE: 1948 DOC#: TR028 DOCUMENT DESCRIPTION: Heating, Ventilating & Air Conditioning Guide H i f ' HEATING VENTILATING AIR CONDITIONING GUIDE 1948 An Instrument of Service Prepared for the Profession containing A TECHNICAL DATA SECTION o f r e f e r e n c e m a t e r ia l o n t h e DESIGN AND SPECIFICATION O F HEATING, VENTILATING AND AIR CONDI TIONING SYSTEMS BASED ON-- T H E TRANSACTIONS-- THE INVESTIGATIONS o f t h e R esea r c h L aboratory and Co o pera tin g I n st itu t io n s-- and t h e P r a ct ic e o f t h e M e m b e r s and frien ds o f t h e S o c ie t y ; A MANUFACTURERS' CATALOG DATA SECTION c o n t a in in g e s s e n t i a l AND RELIABLE INFORMATION CONCERNING MODERN E Q U IP M E N T : THE ROLL OF MEMBERSHIP OF THE SOCIETY; COMPLETE INDEXES t o T e c h n i c a l a n d C a t a l o g D a t a S e c t io n s . $ 7 .SO p er Copy P ublished Annually by Am erica n So c ie t y o f H ea tin g and Ven tilating Engineers 51 M adison Avenue I- labrary , C o p y r ig h t 1948 BY T H E A m er ic a n Society o f H e a t in g and V e n t il a t in g E n g in ee r s fc- A|TO RY IT D edicated To t h e A d v a n c e m e n t o f The P r o f e s s io n and I ts A l l ie d I n d u stries text and illu stra tio n s are fu l ly pr o t e c t e d BY COPYRIGHT AND NOTHING -THAT.

I9 .t Vol. 3 August, 1941 Staff Hygienist Covers 2700 Miles in 3 Days Three Field Ken Now Busy with Plant Surveys In helping member companies "keep precautions apace v.lth production," one of the Foundation'3 industrial hygienists has averaged 2,000 milos a month for the past year.

t F 0 TJ N DAT I ON F~A CTS* ~ 'V Vol. 3.

t F 0 TJ N DAT I ON F~A CTS* ~ ' V Vol. 3.

Twort and Fulton (59) 3tate that oils with a preponderance of paraffins have relatively little -3- carcinogenic activity, but that carcinogenesis is high in oils with a preponderance of isocyclic compounds, Pessano (41) found that some of the products of combustion in gasoline engines are in the group considered carcinogenic.

Aeronautical Research leads the way in payroll allocation, 9.30%, while Chemical Research is second in the participa tion column, 88.1%.

The Principles and Practice of INDUSTRIAL MEDICINE Edited, by FRED J.

THE LJSKARy OF CONGRESS WASHINGTON, DC. 20540 HIOTODUPLICATION SLRVICE I hereby certify that!

VOLUME I1 New York D .

Fieser and Hershberg (21) found that the behavior of polynuclear hydrocarbons in lead acetate oxidation, aldehyde reac^ n indicated that the most carcinogenic hydrocarbons of the s e n e s tested possessed special susceptibility to substitution.

Fieser and Hershberg (21) found that the behavior of polynuclear hydrocarbons in lead acetate oxidation, aldehyde reac^ n indicated that the most carcinogenic hydrocarbons of the s e n e s tested possessed special susceptibility to substitution.