Document gZxyZqQk3jNNNByQLep4k5LJ

COPY August 23, 3956 Yedical Department 3ure.'.u of VJbrfcmen's Compensation Columbus, Ohio Gentlemen: RE: 6531-22 Carl Konrad In August 21, 1956, a visit was made to the National Tube Company, Lorain, Ohio, to check the conditions under which the above claimant had worked. This company manufactures steel. The claimant started working for thi3 company on February 9, 1931 and is still working, having lost no time. It is reported that this claimi*s filed for the record only. The claimant was employed as a bricklayer but on July 1, 195U was classifi-d as an extra foreman. As a bricklayer he would lay silica and fireclay brick in blast furnaces, coen hearths, and checker works. Counts taken in other plants indicate a dust exposure in this employwent from 2 to 20 million particles per cubic foot of air. Qist from silica brick would contain a high percentage *f free silica. Very truly yours, DeWitt Huffman Industrial Hygiene Engineer