Mar ch 1 1 , D r .

November l6, 19$7 Dr, William F.

July 7, 1361 Personal and Confidential Joseph C.

4 S e p te m b e r 2 J , 19W> Hr.

A VA / \ J y v' ^A - \ V ETHYL CORPORATION IK T E R -O F F IC E MEMORANDUM 1.

: k

* ,!

N22277 3f rm r.

December 5, 19^0 Dr.

ETHYL CORPORATION 100 PARK AVENUE NEW YORK 17, NEW YORK October 10, i960 Product Service Circular Letter No.

H E AS S OCIATED ETH YL COMPAN Y LIMITED T r ' - R/engist'eredOffice: t h e a d e l p h i ,L o n d o n ,v k c .2 ^id d m ss a il com m unications u n t ilJu r ih e r notice to: A R T I L L E R Y I^ OTISE, A R T I L L E R Y R OW , L O N D O I , S .

\; IN TER -OFFICE C D S IlE M N D E N C B i v r i i v i . ( a s i !

L i l S-'C TE UIITED STATES POTTERS ASSOCIATIOIJ o br a h ic biime r x j a r s sup.vsim .nc3 pr o g r a m t ps t pr o c e e u k s The United S ta te s Food and Brug A dm inistration Method LTB`-83a h a ll bo th e procedure fo r determ ining the re le a se of heavy m etals from ceramic su rfa c e s l-SX'^TXOIJ: In stead of s i x u n ii's i r ^ v i d u a l i y analysed .> act in d ic a te d in f the Ic&eli&to from 3 u n its s h a l l bo blended f o r the cloternanatisn of hoary motsJL r e le a s e .

/ May 29, 3' 37 To: Mont ana Pet r ol eum Associ at i on Boar d of Gover nor s Cont act s on Ai r and Wat er Conser vat i on Re: Act i on by t he St at e Boar d of Heal t h on Ambi ent Ai r St andar ds The Mont ana Boar d of Heal t h hel d a hear i ng Fr i day, May 26, begi nni ng at 7: 30 p. m and concl udi ng Sat ur day, May 27, at 11: 30 a. m. on pr oposed ambi ent ai r qual i t y st andar ds.

January llj., 193?