Document mbrrDv2Xj9rJEOEjZ7vrRZ8Rg

NORTON COMPANY SA^mr **aoucrs orvrsov sooo AtArAMLO wa ou^rev m oaaao fhonk mgu 04a~44aa rmjtxarrsat May 5, 1982 RECEIVED Dr. Burford V. Culpepper E. . DuPont de Nemours ERD N-11400 Wilmington, DZ 19898 V UA 8>**9CiMm*S*9Pe?r7AD, Deer Dr. Culpepper: Ac che requeec of Mr. John Gillsspis, I u sending you chli leccer end che ecceched documents In order co relcerece che position Morton Coaptay hee taken regarding che uee of non-powered air-purifying reeplrecori in asbeecoe-concalaing atmosphere*. Mn nan-noM.r.d air-purifying reeplracor tocellr eliminate* eebeetot fibere. N or any ocher hacardou* aacerlale, from che breaching rone. Negaclve-preeaure I reepiracore provide varying level* of proeeecloa co che wearer depending on J their deaiga criteria; i.e., a quareer-aaak duat/nlec reeplracor provides I leas proceecion than does a self-contained breaching apparatus. / The Norton 7170 respiraeor is approved under TC-21C-170A for use in asbescos- concainlng acaospheres. However, che filter media used in this or similar dusc/mlsr rasplraeora does aoc provide the saae degree of efficiency of parti cle removal at does a high-efflclency filter designed far such use in accordance vleh 30CFK 11.140-11. In addition, none of che MIOSH/tBHA appsoved reepiracore manufactured la Che industry coday for aabeseos use were approved by NIOSH with che ides in aiad of protecting against aesothelioaa or any ocher cypas of carcinoma associated with reepirable asbestoe fibers. In fact, these respirators vers approved with rh. <nr--r n* wearers from the possibility of coa- Cractlns a aon-aallsnant lung dlses-- asbestosis. ^.--- IC is Norton Company's policy co recommend co our customers the best respiratory protection available baaed on the current knowledge level of industrial disease prevention end- state-of-the-art reepirator technology. The use of high-efficiency filters os an elastomeric facepiece, such at the Horton 7380, represents che beat non-powarsd air-purifying negative-preseure respirator available fro* any manufacturer for protection from eebeatoe fibere. If you have any furthar queeriona ragarding che poelcion Horton Company hae taken regarding tha uae of non-powartd air-purlfylng raspiratore in asbcscoa-contalning aemoapharaa, plaaaa do not haaicaea to contact me. kag WOHurd (Tel; (213)-688-4646) RHitchcock Product Manager DQP 0933917 DU 036472