Another matter I might call to your attention is the fact that the finding of some lead in the urine of the claimant by Mayo's was several years, at least two or three after he was employed.

Devan purporting to relate to the additional b-th cc. of tetraethyl lead per U.C. gallon that has recently had the approval of the U.S. burgeon General.

39--Chemical Hazards hydroxytoluenes cresols monomethyl aniline methyl aniline 2-hydroxytnethylamine diethylamino ethanol motor fuel antiknock compound tetraethyl lead iso-butyl carbinol iso-propanol iso-propyl benzene iso-propyl carbinal 1 1k muriatic acid hydrochlonc acid munatic ether ethyl chlonde l-amyl alcohol N iso-propyl alcohol cumene naphtha 76 naphtha (petroleum) 1-butanol nitrating acid acids, mixed nitrochlorobenzene chloronitrobenzene 0 ilgroin liquefied petroleum gas LOX lye M naphtha (petroleum) LP-gas oxygen, liquid sodium hydroxide oil, fuel oil of mirbane oil of vitriol pr fuel oil nitrobenzene sulfuric acid pentanol acetate MBK methyl butyl ketone pentanols MDI isocyanates 2-pentanone MEK methyl ethyl ketone perchloroethylene methanal formaldehyde petroleum ether methanethiol methyl mercaptan phenyl amine methanol methyl alcohol phenyl chlonde 3-methoxy-1 -butanol amyl alcohols phenyl ethane 2-methoxy ethanol phenyl ethylene ethylene glycol monomethyl ether phenyl methane methyl Cellosolve acetate 2-phenyl propane ethylene glycol monomethyl ether acetate phorone, iso methyl acetic ester methylacetpaitme etic ketone methyl acetylene propyne polonium amyl acetate amyl alcohols methvl propyl ketone tetrachloroethv lene naphtha (petroleum) aniline chlorobenzene ethylbenzene styrene monomer toluene cumene isophorone cyclohexanone radon methyl acrylate methyl benzene 2-methyl butane 3-methyl-1-butanol 3-methyl-1-butanol acetate 2-methyl butyl ethanoate acrylate,metphryolpane toluene 1,2-propanediol pentane 1,2,3-propane tnol l-amylalcophroolpanols amylacet2a-tperopanone amylacetpartoepene oxide LP-gas propylene glycol glycenne propyl alcohols acetone propylene oxide methvl n-butyl methane hexane 2-propen-l-ol allyl alcohol methyl Cellosolve propyl acetone methyl butvl ketone ethylene glvcol monomethyl ether propyl carbinol butanol methyl Cellosolve acetate propylene dichlonde 1,2-dichloropropane ethylene glycol monomethyl ether acetate propyl methanol butanol methyl chlonde methylene chlonde pnissic acid hvdrocvamc acid methyl cyanide methylenebis (4-phenyl isocyanate) acetonitrile isocyanates Q methvlene chlorobromidebromochloromethane quick lime lime (quick) methvlene dimethyl ether methylal R methvl ethyl carbinol methvl ethylene glycol 2-methvl hexane methyl iso-butyl carbinol butanol propvlene glycol heptane methvl amyl alcohol red fuming nitric acid refrigerants mtnc acid (red fuming) see chemical name c9 methyl methacrylate acrylate, methyl methvl methanoate methyl formate 4-methvl-2-pentanol methyl aim 1 alcohol 4-methyl-2-pentanone methyl iso-butyl ketone 4-methyl-3-pentene-2-one mesitvl oxide sodium evanide sodium pentachlorophenate sulfuric ether Ti cyanides pentachlorophenol ethsl ether methvlphenols eresols TDI isocyanates methyl propanol butanol Teflon poK'tetrafluoroeths lene mineral spirits naphtha (petroleum) TEL tetraethyl lead monochlorobenzene chlorobenzene tetrabromoethane acetylene tetrabromide monoethanolamine ethanolamine tetrachloromethane carbon tetrachloride monoethyl amine ethvlamine tetrahvdronaphthalene Tetralin monomethyl hydrazine methyl hydrazine tetramethylene oxide tetrahydrofuran 1210

Machle on tetraethyl lead since he will find there a,rather complete description of the methods of treatment which we are using at the present time, and with fairly good results.

Devan purporting to relate to the additional 4th cc. of tetraethyl lead per U.D. gallon that has recently had the approval of the U.3.

N29574 11 Data and Correspondence Sludge, Scale and f'ater Bottoms -s from Gasoline Storage Tanks oo CO 02 o Ur Required: March 4 I9I4B Determination of lead compounds present Results Per Cent Per Cent Lead as Lead as Lead Tetraethyl Triethyl Lead <0.00001 O.OOO3 Per Cent Lead as Diethyl Lead Halides Q.OOI7 Per Cent Lead as Di- and TriethylLead Halides and Carbonates 0*00045 Per Cent Lead as Inorganic Lead 0.225 Reported: 3-24-48 0009888 SUBJECT Standard Oil Company - Steel EL Segundo, California DATE April 23, 1948 I regret very much not having answered your letter of March 31st sooner, regarding scale from side plates of a gasoline tank which you analyzed.

Com m ittee on A ir P o llu tio n from A utom otive Engine Exhaust C ity of C in cin n a ti REPORT TO THE CITY MANAGER from COMMITTEE ON AIR POLLUTION from AUTOMOTIVE EXHAUSTS CHAIRMAN Dean Cornelius Wandraacher College of Engineering University of Cincinnati SECRETARY Chas.

Regardless of general business, how ever, and barring any dnutfc reces sion, it appear* that some of lea-fa major consumers, like storage battenca, tetraethyl lead and cable, should consume as much or a little more lead in 1961 than in I960.

Collop as showing no avidenco or signs of absorption of tetraethyl lead* Capsur again visited Dr.

Regardless of general business, how ever, and barring any dnutfc reces sion, it appear* that some of lea-fa major consumers, like storage battend, tetraethyl lead and cable, should consume as much or a little more lead in 1961 than in I960.

Its most important toxic effect is depres In an investigation of workmen in a sion of the central nervous system In ex foundry who had been exposed to 0 1 to 10 perimental exposures of human subiects, mg of tellunurn per 10 cu m of air, a large those exposed to concentrations greater percentage of the men showed die garlic than 200 ppm promptly suffered central ner odor of the breath and sweat and also com vous system symptoms, while those exposed plained of dryness of the mouth and a to about 100 ppm did not metallic taste Men with the highest expo sures, who also had the highest rate of tel lurium excretion, showed drowsiness start See Hygienic Ginde Tetraethyl lead--see Lead ing in the early afternoon and later becoming more severe Complaints of loss of appetite and nausea at these relatively low exposures were less common Tetrahydrofuran (tetramethylene oxide) is used in chemical reactions and as a sol vent for resins and plastics Both acute and chrome exposures constitute a moderate 1'EPP (tetraethyl pyrophosphate) is the health hazard Symptoms of overexposure active ingredient in an insecticide mixture that goes by the same name Since the esti mated fatal dose for a human being is ap proximately 600 mg taken orally, it ls in the class of highly toxic materials --nausea, dizziness, and headache--soon dis appear when fresh air is inhaled Kidney effects reported in early studies were prob ably due in part to impurities m the com pounds tested In Us use, toxic dust respirators or sup See Hygtemc Guide plied air respirators and protective clothing which will completely prevent skin contact should be worn Anyone with a severe headache or a feeling of tightness or con striction in the chest should be removed immediately from the exposure Tetryl (2,4,6-tnnitrophenyl-methylrutramine) is a high explosive notable for its ability to produce a severe dermatitis by di rect contact and a high grade of sensitiza tion in some persons There is some evi dence of a slight systemic toxicity, not as 1,1^2-Tetrabromoethane (acetylene tet- important in practice as the dermatitis rabronude) is a high-baling, heavy, yellow The systemic toxicity seems to consist of ish liquid used as an indicator liquid m general central nervous system symptoms gauges and for separating minerals by densi and anemia, although there is some evidence ty.

Change as follows;----- "Lead and Its compounds can b taken into the body by inhalation or by ingestion (swallowing), (Tetraethyl lead Is readily absorbed through the skin.

Little York Hospital at noon on September 20, i960, to establish whether he had absorbed a significant amount of organic lead, (tetraethyl lead) and!

There are a number of peculiarities, however, in the case of tetraethyl lead poisoning, and one of these is that the lead compound is lost from the body at a more rapid rate than in the case of inorganic lead compounds.

John Camacho in Little York Hospital at noon on September 20, i960, to establish whether he had absorbed a significant amount of organic lead, (tetraethyl lead) and|to offer advice in the management of any toxicity problems that might be present. !