B.: Symposium on Environmental Lead Contamination.

First, the elimination of lead from gasoline would not eliminate all lead from the atmosphere, because the lead in the atmosphere comes from many sources.

Arc welding on terne plate, lead pots in heat-treat operations, and lead pots for miscel laneous leading operations are other examples of possible sources of ex posure to lead.

That of lead excretion is one such problem.

If you doubt this, examine our data in the two last articles on lead ingestion.

LEAD DETERMINATIONS MADE SEPARATELY ON DRAININGS AND SLUDGE AND LEAD CONTENT AT EACH DRAINING DETERMINED BY THE ADDITION OF THE TWO. .

Joseph Lead Co.

In ray opinion, they can all be covered by the same regulations, except that I would consider it advisable that the concentrations of tetramethyl lead, trimethyl-monoethyl lead, and di-methyl - di-ethyl lead in gasoline singly or in combination, should not exceed the equivalent, in lead content, of 3 m l , of TEL.

The researcher explained that the high lead levels-- in workers' blood "occurred in the parts of the plant with the high .lead levels.

Rational Lead Co.

Monthly tests for bloo-d lead, urine lead, hemoglobin count, porpborine and. stippling should be required for all workers exposed to lead. 5.

MacGregor Lead Co.

However this method was never suitable for use In determining quantities of lead less than 0.1 milligrams.

Quality Seal Other Lead free and Leaded 191,200 Lbs. 11,300 Lba. 687.900 Lba. 1.090,tOO Lba.

Quality Seal Othar Lead Brea and Leaded 191.200 Lbs. 11,300 Lbs. 687.900 Lbe. 1,090,400 Lbe.