And lead on the market.

It is the ade quate use of pure red-lead.

I feel quite certain it will be found that the urinary lead concentration is much the best measure of lead exposure.

DUTCH BOY WHITE-LEAD .....

Lead Evaluation/acceptance of other technologies in place of lead service line replacement o recent inquiry by consulting firms looking for approval of insitu technologies to serve in place of lead service line replacement, with costs being the driver (LSL replacement in a large community system is not cheap) o Rules do not allow for this "replacement", however, perhaps additional study by EPA into these technologies (effectiveness, longevity, effects on water quality) could decide the fate of such technologies as it pertains to the Pb/Cu rules and required LSL replacements Partial Lead Service Line Replacement versus No Replacement It is widely accepted that full lead service line replacements are more effective in limiting lead exposure to a customer than partial lead service line replacement.

The evidence shows /that the lead exposure involved la so slight that it can not be measured by any of the methods which we have employed and which have been effective in measuring the lead exposure of persons in dangerous lead trades.

On the assumption that you will probably receive some small mippXy of tetraethyl lead, I wish to point out the quit considerable danger of handling even small amounts of tetraethyl lead.

That is to say that the relationships between the lead concentration in the blood and that In the urine are very different In tetraethyl lead poisoning as compared vith inorganic lead poisoning.

NATIONAL LEAD COMPANY New York, III Broadway .

Label all paints which contain more than 1% lead in their non-volatile con tent.

COMPOSITION Tribasic lead sulfate Basic lead silicate sulfate Modified tribasic lead sulfate Dibasic lead phthalate Dibasic lead phosphite Lead chlorosilicate complex Tetrabasic lead fumarate Basic lead chlorosilicatesulfate complex Dibasic lead stearate Mol.

~xroolo to dccxx^in" lead cTfoct.

COMPOSITION Tribasic lead sulfate Basic lead silicate sulfate Modified tribasic lead sulfate Dibasic lead phthalate Dibasic lead phosphite Lead chlorosilicate complex Tetrabasic lead fumarate Basic lead chlorosilicatesulfate complex Dibasic lead stearate Mol.

1i ` NATIONAL LEAD COMPANY ATLANTIC KANCK 111 Broadway.

_SLA.JEJELS_ PRY TTBUS LEAD .