Document NE5BKj2Q2x8o9DEKxGr5x0gOE

A'JG I 0 1379 V.o. JL/Iirmv i 1 \jr LADUK Occupa<ionl Safety amJ Health AJminiatration WASHINGTON, D.C iOMQ . Dena Meyer Engineer - Industrial Hygiene Engineering Department Louviers Building ' E.I. du Pont de Nemours and Company Wilmington, Delaware 19398 t ` Dear Ms. Meyer: ^ This is in reply to your inquiry regarding the interpretation of respiratory protection required by OSHA's asbestos* standard, 29 CFR 1910.1001 (c) (2)(iii) . Employees about to engage in the spraying of asbestos, in the removal or demolition of pipes, .structures, or equipment covered or insulated*with 'asbestos, or in the removal or demolition of asbestos insulation or coverings, shall be provided with and shall use a type "C" continuous flow or pressure-demand, supplied-air respirator. This requirement holds `true unless the employer has positively established in advance that the airborne concentrations of asbestos the employees will >nfront will wot exceed 100 either of the permissible exposure limits; i.e., 8-hour time-weighted average and' ceiling limits. ;* If the employer has conclusively established the upper concentration of airborne asbestos that employees could confront during spraying, demolition or removal, then any of the respirators presented in 29 CFR 1910.1001 (d) (2) (i) , (ii) and (iii) that afford adequate protection at such ' upper concentration of airborne asbestos may be used. I trust that this answers your question, and confirms what Ms. Garrahan discussed with you previously. If wc cun n in the future, we shall be glad to do SO. f W*-'- -- v- Sincerely, Grover Wrenn in I eel in , Federal iVr.sjd iuni'O Uhl M.ile Pi DUP 0906822 SC-DP-05970