Document 9L6kMq377R7ba2jevdM67Z3MV

cc ?. K. Hodgson * Marshall las. 2. A. Andre * Marshall Lab. 4 - H. A. Wrey - Marshall.. Lob. Map id, im *. a. h aaf f . a r. upf. MARSHALL LAS. Him mo u c p l a^ w-/iflT spcartf Ref* Your letter of April 33, 1971 All oaterials in RC-112S7 ere approved for ue is can coatings except the preservative, bensyi trinetbyl asaoniua hydroxide. 3iace there le only 0*13# preservative in the resin, solvent cleaning of the reactor end thin tanks would reduce the aaount of potential crose-cootanination to virtually sere. Therefore, as long as the vessels are sol vent cleaned before Manufacture of an ISA approved resin, thtre is no precis* with the Manufacturing of HC-112h7 in the sane vessel. wwM/ps WILLIAM V, MfTTJce TOXICITY COOBS2HASOR N38441