Document BRjBZkzG8zvMdewYe06kYZVXj

Wilmington. Delaware 1989* CNOlstIlva SCNOTMINT ucuvtcws tuiLai^a December 12, 1979 L. F. PERCIVAL PLASTIC PRODUCTS AND RESINS WILMINGTON PLASTIC PRODUCTS AND RESINS - WILMINGTON OCCUPATIONAL ENVIRONMENTAL CONTROL GROUP GASKETS AND PACXZNG MATERIALS CONTAINING ASBESTOS AC your request, I have compiled information on gaskets commonly i used and their composition (Table I). I have also included ' information on packing materials and their composition (Table II). Most of the information was provided to me by G. F. Hickey (ESD Consultant). Specific work practices should be followed to minimize exposures when handling asbestos materials. These practices include but are not limited tot Use knife or punch press for cutting gaskets. Avoid sawing, grinding, os other dust-generating processes. As required by OSKA, any tools (hand-or power-operated) which may produea airborne fibers in excess of permissible exposure limits must be provided with e dust collection system. Vacuum the area immediately after the cutting operation with equipment previously reaommendad (my latter of December 3). Above ell else, use pf compressed air for cleanup or dry sweeping ie prohibited. For gasket cutting or any other operations where airborne asbestos concentrations may exceed ambient air concentrations, it is advised that monitoring be performed. Gaskets which are to be discarded should b^placad in impermeable . begs end be disposed of following asbestos waste disposal procedures. 720 6m DUP 0905677 DU 026846 Page 2 December 12, 1979 L. 7. Percival Special eases - it is recommended that when gaskets used for supplying breathing air systems are to be replaced under the regular maintenance schedule any compressed asbestos gaskets be replaced with non-asbestos substitutes. It has also been observed by G. 7. Hickey that'P-gaskets' in drying oven doors may generate airborne asbestos fibers due to wearing of gaskets when the oven doors are frequently opened and closed. Air sampling would be necessary to evaluate this. Please call me if I can be of any further assistance. ENGINEERING SERVICE DIVISION Occupational Environmental Control Group D. Meyer Engineer - Industrial Hygiene DM:sg Attachments 0U7 0905678 bins*' DU 026847