Finely divided lean oxide C'ld&d 'dsqui oxide, FogC-g) Is. produced by burning a restore .of propane* air and tetraethyl lead.'

I believe the tetraethyl lead area has a maximum approved specification of 0.002 milligrams of lead per cubic foot of air about the area.

Kehoe. ' T o ... . 2 rATK 15-1-37 It has been agreed amongst the oil companies in Germany that they shall not use more than 0.2 c.c. tetraethyl lead per litre of locally produced gasoline (as opposed to imported gasoline).

It maybe that his request for leaded isooctane of certified quality was unjustified.

Tn view of the difference between the percutaneous absorption of tetramethyl lead and tetraethyl lead, it would certainly be interesting to evaluate our two compounds in this regard.

D. 0020648 mmimm o k ib v t h ig a ^iq k o f iiAgAEPg OF U oT" "vTlOh'* OK BilHALF W TiiOSIfSbK Fh<^UCfga IKC. 1 -us investigation as contemplated by ourselves end agreed upon in principle at a conference in Cleveland* Ohio, on April 2j , 1*43* is to be pursued in two general end complementary phases, namely; (a; determination of the potential hazard of contact of the skin with the "Vitola mixture containing * sal. of tetraethyl lead per gallon* by subjecting experimental animals to such cutaneous contact with the product under conditions and by means comparable to those employed In the investigation of the potential hazards of cutaneous contact with gasoline containing j) ml. of tetraethyl lead per gallon* Ibj termination of the apparent hazards of lead absorption on the part of persons who nave been,and are to be, exposed to such hazards in the conduct of work which involves the preparation* handling and use of "Vitoi% by carrying out a systematic program of clinical and analytied examinations of available personnel, (the lattax' work is to be carried out by methods comparable to those used in the investiguti of the hazards associated with the manufacture, distribution and us of leaded gasoline* with such improvements in technique as have been found to be useful in recent years.; It would appear from our experience that the proper execu tion of these investIg&tions may be expected to yield a fairly definitive answer to the queeiion of the degree of hazard associated with such exposure as may occur among garage mechanics, other main tenance personnel, and filling station handlers of the pxoduot.

W I;hQMPgh ^Oeffi, iSS* 'ills investigation a contemplated by ourselves fend agreed upon In principle at a conference in Cleveland# Ohio, on April 2o, 1:943, is to be pursued in two general and complementary phases, namely; (a; determination of the potential hasard of contact of the skin with the "vitol'* mixture containing 3 ml. of tetraethyl lead per gallon# by subjecting experimental animals to such cutaneous contact with the product under conditions and by means comparable to those employed in the investigation of the potential hasarda of cutaneous contact with gasoline containing $ ml. of tetraethyl lead per gallon; lb; determination of the apparent hasards of lead absorption on the part of persons who nave been,and are to be, exposed to such hasarde in the conduct of work which involves the preparation# handling and use of "Vitol'', by carrying out a systematic program of clinical and analytical examinations of available personnel.

First, we have no way of predicting what the valde for organic lead will be in any tank and consequently it won*t be of muoh help to a workman, to know that the mean value is 0.0h2 when the tapk which he is cleaning at the moment happens to Contain very much more tetraethyl lead.

But to get to your main questions, let me say that, so far as tetraethyl- and tetrarnethyl-lead are concerned, we have little information, and there is little likelihood that we shall obtain much more.

stractions to all distributors of gasoline containing tetraethyl lead* in which they were making use of the type of regulations which were originally employed In our book of regulations*.

First, we have no way of predicting what the valhe for organic lead will be in any tank and consequently it won*t be of muoh help to a workman, to know that the mean value is 0.0M-2 when the tapk which he is cleaning at the moment happens to Contain vary much more tetraethyl lead.

Kitzmiller Dear Doctor Kitzmiller: I greatly appreciate your letter of November 17, 1953 which arrived in time for the meeting of our Smog Committee on November 19* I was very much i:nterested in reading the relative lead concentrations in the group o.f individuals who have worked at the Ethyl Terminal In Wilmington and especially the fact that they had worked there for over five years One of the real concerns of our Committee Is this: We have been told that betwee n 10 and 12 tons of lead are emitted daily in this area through the burning of tetraethyl in our fuels.

There are obvious questions raised by the re port* One of these is that only about 0.73 eo. of tetraethyl lead was found in the Ethyl gasoline* I do not know of any Ethyl gasoline carrying as little lead as this* The other is the apparent assumpt ion that all of the combustion products wore analysed* A rough calculation on my part would indicate that about ZbO cubic feet of air is necessary to burn one pound of gasoline and, therefore* the estimates given in the report of the percentage of lead removed are in error.

But to get to your main questions, let me say that, so far as tetraethyl- and tetramethyl-lead are concerned, we have little information, and there is little likelihood that we shall obtain much more.

A TK IN S, PIRST VICS-PRESIDENT Senodntbhaeckfohlleorweoinf,gwmheiscshagaere, shuebrjeebcyt atogrteheed tteorms HEW YORK N T 009*' 9 1 98 4 SEARROTMOAfNlgRTOHRIO HABLYDHGURSCTOLUMBUS OHIO REGARDING THREE DEATHS INSANITY EIGHT WORKERS FROM TETRAETHYL BEAD i STANDARD O IL NEW JERSEY PROFESSOR HENDERSON WIRES US SALE TO PUBLIC I m*- .0 ?