Document renQqYNjL2Z9zEoabqOynM4jv

M ar ch 20, 1962 v'ir . J . G . M a c k e n z ie C hief, D ivision of A ir Pollution ubile H ealth Service W ashington 25, D, C. h e a r M r, M ackenzie? I ap p reciated the opportunity of m eeting you and p artici 'at in g in th e d is c u s s io n on th e u s a of T e tr a m e th y llc a d fo llo w in g D r . .'.Cohoe' s p r e s e n t a t i o n o f th e r e s u l t s of th e f ie ld m e d ic a l s tu d y . hi connection w ith our d iscu ssio n on m ixed lead alkyls yea in d icated you w ould lik e a copy of the com position, of th e se a n tik n o c k s , w h ic h y o u w ill fin d a t t a c h e d . Ix y ou w ill r e f e r to th e r a p w h ic h W3 u s e d to d i s c u s s th e a r e a s of u s e o f X M L a n d m ix e d lead alk y ls you w ill see we did not show th e use of the individual antiknocks, but grouped them to g eth er under M LA's, The re a so n for th is is th a t at th is tim e M L A 500 is the only one being u sed , and th is is b ased upon the econom ics of antiknock use w hich we d isc u sse d . If th e re a re any q u estio n s p le ase do n ot h e sita te to get in touch w ith m e. Tours very tru ly . [G :b a tt. c c i D r, Vf. C , C o o p e r Dan M . Guy N9591 i. 1 X4' * * rf T GL imfe M o t o r M ix C o m p o sitio n ('W eight P e r C ent) T otal T e tra a ik y l l*ead TKL (Ca) t^Vic (C ^) a,t2lvie2(C g ) * , { ..) TiviL t c 4 r C thyleac D ibroroide Cthylona D icliioride X>ye In-arts 6 1 .4 3 6 1 ,4 0 1?. 66 1U*6 1 C ranga- 0.0621 1.79 im p o r t N o. R T - l 12 U /2S /60 N9591.01 M IX F 1...L/S A 250 oto r M ix /'v.i A v)0 M otor M is M Li.A ?3 M otor M ix TM i. M otor M ix 5?, Si 19. 05 2 4 .2 ? .sy Z. 45 0 . 19 17.47 18.40 O rases- 0.0631 C.'+ '* 6*:D 3.67 13.9? 2 0 . 01 12.71 3.02 16.97 17.08 Cf}? *`1Si,; 0.0647* n .? 49,42 . 22 2. 55 10.94 20. S H . 80 16.50 17, 33 G rande U3 16,63 45.74 N)4 --- *-- 45,74 16.07 16.94 .- x*d 1 0 0 - 0.0153 21.23 \H 30 CJ O O O vu.