Urol. 7:343, 1926.

Urol. 7:343, 1926.

The practical impetus for these investigations, as well as their economic justification and support, came out of certain problems posed by the introduction and use of tetraethyl lead as an antiknock additive in automotive gasoline.

Tlio-c -tih-lanecs which are mo-1 prevalent or mo-1 injurimi- to health, -uch a- benzene, lead, carbon monoxide, carbon tel racldoride. or -ilica. have received comprehensive con-ideralion.

DIRECTORS (1925-1926).

DIRECTORS (1925-1926).

PLAINTIFF'S EXHIBIT API-94 SC-API-2355 A P I MISCELLANEOUS CORRESPONDENCE 1953 through 1956 2l 'll!.

N y' Lead Ab s o r p t io n , Lead E xcr e t io n and Lead P o iso n in g by R o b e r t A.

Attention is accorded to discussion of effects of both inorganic lead and alkyl lead compounds used as gasoline additives. 12.3.1 Effects of Lead on Heme Biosynthesis The effects of lead on heme biosynthesis are very well known both because of their prominence and the large number of studies of these effects in humans and experimental animals.

WHERE DO THEY GO FROM HERE ?

On December 9, the Environmental Pro tection Agency (EPA) published revised regulations applicable to gasoline refiners designed to reduce the lead content of gasoline 60%-65% over a 5-year period, 1975-79.

CLAIMED PRIVILEGED BY OCF SEQUENCE OF THE ACGIH TLV FOR ASBESTOS Year 1946 - 1961 1962 - 1967 1968 - 1969 1970 1971 Listing MINERAL DUSTS Asbestos - 5 mppcf MINERAL OUSTS Silicates (less than 11 crystalline silica) Asbestos - b mppcf MINERAL DUSTS SIlicates~Tless than 11 crystalline silica) **Asbestos - 5 mppcf **NOTICE OF INTENDED CHANGES Asbestos - 12 fibers/ml > 5 jj in length,J) or 2 mppcf1^ J) As determined by the membrane filter method at 430X phase contrast magnification.

Urol. 7 '-343, 1926. 536 Ibrahim, A.

While year- DUP 1140204 DU 057738 -4- to-year figures are not strictly comparable due to changes in com panies reporting to the NSC, the organization's statistics show a decline in the frequency of injuries between 1926 and 1932.

Lead.