Document r6qQwMk2G69rvQB1jpxL1wkyG

Material: Submitted: Required: Wheat Samples (from Denver Producing and Refining Company, Edmond, Oklahoma) 12^22-58 by Dr. K. V. Kitzmiller for Mr. Kearney J. Hurst, Ethyl Corporation, Oklahoma City 7> California Dead Analyses Sample Number 1 .-2. ' 3 .4 5 . .. ' 6 Results Analysis Number 58A-8395 58A-8396 58A-8397 58A-8398 58A-8399 58A-8400 Weight Grams 10.1 10.0 10.1 10.0 10.0 10.0 Lead PPM 1.4 1.2 1.4. 13.2 Reported: 1-15-59 IM TERP RE TATION Th e lead con ten t of each of sam p le s 1 th rou gh 5 is h igh er th an we w ould exp ect it to be in fr e sh , clean , u n con tam in ated gr ain , by a fac t o r of 5 to 6. Th at is we w ould n ot exp ect n o r m al v alu e s to be in e x c e ss of 0. 2 p a r t s p e r m illion . Sam p le 6 (d u plicate an a ly sis) w as d efin itely con tam i n at e d w ith le a d , an d in. o u r o p in ion w ou ld b e u n su it a b le fo r u se . Sam p le s 1 th rou gh 4 w ould n ot b e u n sa t isfa c t o r y fo r u se , w h ile sam p le s 5 an d 6, alth ou gh u n sa t isfa c t o r y , w ould n ot be h igh ly d an gerou s fo r m akin g b r ead or p ast r y fo r lim ited u se over a fair ly sh ort period of tim e On th e w h ole, th ese fin d in gs con firm ou r opin ion , e x p r e sse d r ep eated ly o v e r th e y e a r s, th at food m a t e r ia ls sh ou ld n ot be st o r e d in tan k s th at h ave been u sed fo r the st o r age of lead ed gaso lin e un til aft e r su ch tan k s h ad been clean ed by san d -b lastin g. Th e h igh v alu e foun d in sam p le 6 is r e a d ily exp lain ed a s th e r e su lt of co n t act of t h is sam p le w ith a r e la t iv e ly con tam in ated p a r t of th e tan k su rface. Sign ed : __ \X rtsh e R o b e r t A . Keh oe, jM , D.