Document 6GzX9OoOMp2MVK0G2ZEKeGG4

AMERICAN SOCIETY f o r TESTING a n d MATERIALS C O M M ITTE E D -2 2 O N M E TH O D S O F A T M O S P H E R IC S A M P L IN G A N D A N A LY S IS m O Organized in 1951 C H A IR M A N : P. M . G JE V E R , IN S T IT U T E O F IN D U S T R IA L H E A L T H , RO O M 1 6 2 0 , S C H O O L O F P U B L IC H E A L T H , U N IV E R S IT Y O F M IC H IG A N , A N N A R B O R , M IC H , 4 B I0 4 V ic e -C h a ir m a n ; b . T. h , L E V A D rE , d iv is io n o f in d u s t r ia l h y g ie n e , S T A T E O F V E R M O N T D E P A R T M E N T O F H E A L T H , 0 O X 3 3 3 , B A R R E , V T . 056.41 S E C R E TA R Y : S. F . E T R IS , A S T M , 191 RACE S T .. P H IL A D E L P H IA , P A. 19103 Address reply to **-> I ndust r i al Hygi ene Di vi si on P. O. Box 607 Bar r e, Vt . Oct ober 18, 1967 Dr . Rober t A. Kehoe Ket t er i ng Labor at or y Uni ver si t y of Ci nci nnat i Col l ege of Medi ci ne Eden and Bet hesda Av es . Ci nci nnat i , Ohi o 95219 Dear Dr . Kehoe: Your ear l y r epl y t o my l et t er i s much appr eci at ed, f hope t hat 2 37 wi l l not be hast y i n i t s act i on and i nt end t o cont i nue encour agi ng a caut i ous posi t i on on t hi s l i mi t . Cor d i a 11y, Bl_: Imb N13931 KE 0012184