From these findings, recommendations can be made for improvement in controls leading to prevention of occupational disease.

Kehoe: The Lead I ndust r i es Associ at i on has pr epar ed a dr af t r ecommendat i on t o Z 37 of USASI whi ch set s t he TLV f or Lead Chr omat e at 0. 5 mgms per cubi c met er . 1 have been asked t o par t i ci pat e i n t he del i ber at i ons on t hi s.

factor 0.5 500 0.5 400 * Collected by electro- static precipitator If vapors involved apply appro- priate TLV 500 A6 10 mg % Resp free 102 alternative mass formula Respirable free Si-as defined by Arcodynamic Diameter Minimal unt density sphere % micra Collected < 2.0 90 2.5 75 3.5 50 5.0 25 10.0 ) Stoddard solvent 500 200 Tetraethyl lead Tetramethyl lead 0.075 0.075 Downward revision " 28282 OOO BOSC Se Be BO 2 2 Se 624 24222 2ES C782 SFSER PINES SED On We eewe eee Fae ?

My schedule of activities has been dislocated almost hopelessly by the demands made on my time during the past year, by the problems of air pollution in relation to lead.

Tho milestone concept leads into tho safety engineer's participation.

Will or at any other time leading up to 12 your deposition today, were you ever shown that?

A ruptured tank or line could lead to a serious explo sion and fire.

Lead fumes from this operation were observed entering the open plant windows, and a large puddle of lead was later found in the burned-out drum.

or mppcf Benzene Butyl mercaptan Cristobalite* Tridymite* Ethyl mercaptan Heptane Methyl mercaptan Octane Oil Mists* Pentane Petroleum distillates Quartz Stoddard solvent Tetraethyl lead Tetramethyl lead C 25 10 250 mppcf 10 0.5 *Downward revision by a factor % siOo+5 10 200 id 200 of 2.5 ?

Lead Le v e ls in Urin e an d Blood 1.

But PVC with lead silicate and Cadmium stearate forms little color and has much chloride formation. 2.

The new roof shall be 4 ply asphalt and gravel roof complete with new composition flashing at parapet and the following sheet metal items: 26 gauge galvanized iron gutter (4" x 4" box) 26 gouge galvanized iron downspout 26 gauge galvanized iron base flashing 26 gauge galvanized iron heater vent Lead roof drain flashings Lead vent pipe flashings We also propose to furnish new siding on one of the pent houses.

Again the fire resistance characteristics of the PCBs leads to this use as e substitute for other flammable oils.

If vapors involved, apply appro 1000,, 250 mppcf priate TLV 500 A& 10 mg/mr $ SiOg +5 $ Resp. ree SiC>2*+2 (alternative mass formula) Respirable free SiOg as defined by: Areodynamic Diameter Minimal (uiit density sphere) % micra < 2.0 Collected 90 2.5 75 3.5 50 5.0 25 10.0 0 Stoddard solvent Tetraethyl lead Tetramethyl lead 500. 0.075 0.075 200 Downward revision ?

My schedule of activities has been dislocated almost hopelessly by the demands made on my time during the past year, by the problems of air pollution in relation to lead.