If a storage tank has contained leaded gasoline subsequent to its last thorough cleaning, follow instructions of manu facturers of tetraethyl lead 2 Have available the required personal protective equipment fresh air hose masks approved flashlights, safety belts and life lines, rubber boots and gloves 3 Remove all sources of ignition (matches, open flames, smoking, gas engines, welding, exposed electrical wiring and equipment) from the vicinity of the tank 4 Where gas or vapor that is likely to be ignited by a spark is present, use tools and equipment of spark-resistant mate rial such as wood, fiber, bronze, stain less steel.

* ^ m 1-the use of ';Brat.ish' tetraethyl lead /pois|| find out.the present Stibn :in^re^rd?

Obviously when such a tank is cleaned, the workmen may have serious exposure to liquid lead compounds in addition to tho dusty decomposition products of tetraethyl load# I do not intend to discuss all of the possibilities or suppositions in this letter* but no hope to have tho facts available as the result of our observations here and we should then be able to do what Is necessary to solve this problem even if it seems taking the whole matter of tank cleaning under our supervision essentially# It is quite apparent here that the mechanism of putting into effect tho instructions which we have issued on this subject has been unsatisfactory.

Kehoe, I enclose copy of a letter together with a summary of results of inhalation experiments that were carried' out at Porton by Miss Cremer on TetraEthyl Lead and TetraMethyl Lead in rats.

According to the chemist* the fluid was described as fifty per cent tetraethyl lead in a carrier to which dye had been added.

(Tetraethyl lead) (03115)4 Pb, load tetraethyl.

The pump m- had, however, previously been used to pump tetraethyl lead, the pumping hav ing been done by hand.

The pump | had, hjowever, previously been used to pump tetraethyl lead, the pumping hav ing been done by hand.

TEST PROGRAM TO OBTAIN DATA FOR SURGEON GENERAL Purpose: To evaluate the increased hazard, if any, to petroleum workers engaged in blending and handling of gasolines containing TML compared to that of gasolines containing tetraethyl lead (TEL).

TEST PROGRAM TO OBTAIN DATA FOR SURGEON GENERAL Purpose: To evaluate the increased hazard, if any, to petroleum workers engaged in blending and handling of gasolines containing TML compared to that of gasolines containing tetraethyl lead (TEL).

~ / Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL - dacUioa* tad trad* OCTOBER, 19S9 <Vol. 23, No. 101 ' r ' INDUSTRIAL HYGIENE FOUNDATION MELLON INSTITUTE 4400 FIFTH AVENUE PITTSBURGH 13.

~ / Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL - dacUioa* tad trad* OCTOBER, 19S9 <Vol. 23, No. 101 ' t INDUSTRIAL HYGIENE FOUNDATION MELLON INSTITUTE 4400 FIFTH AVENUE PITTSBURGH 13.

~ / Industrial Hygiene Digest INDUSTRIAL HEALTH NEWS LITERATURE ABSTRACTS MEDICAL ENGINEERING CHEMICAL TOXICOLOGICAL LEGAL - dacUioa* tad trad* OCTOBER, 19S9 <Vol. 23, No. 101 ' t INDUSTRIAL HYGIENE FOUNDATION MELLON INSTITUTE 4400 FIFTH AVENUE PITTSBURGH 13.

The early experimental work In this laboratory indicated the character of the hazards of the mixing operations and of all other operations associated with the industry* It became apparent that the compound tetraethyl lead was an exceedingly treacherous lead compound and that It wohld be necessary to rigidly regulate the handling of the material* From time to time* therefore* we have issued instructions based on the continued observations of Industrial conditions* Tie have improved the equipment through the engineering facilities of the Corporation in such a way as tomake the industry safe.

The early experimental work In this laboratory indicated the character of the hazards of the mixing operations and of all other operations associated with the industry* It became apparent that the compound tetraethyl lead was an exceedingly treacherous lead compound and that It wohld be necessary to rigidly regulate the handling of the material* From time to time* therefore* we have issued instructions based on the continued observations of Industrial conditions* Tie have improved the equipment through the engineering facilities of the Corporation in such a way as tomake the industry safe.