Document MGw1dLov2QaqKoav64wvGZgMM

Pont de Nemours Si Company CHAMBERS WORKS OKKPWATt*. NKW JC*9CY WU J. Stopps, K.D., Haskell Laboratory A. Zapp, Jr., X.D., Haskell Laboratory V. Thatcher, Construction M. Deputy, Ing.-l Censtruetion L. NeXnany, Jr., Ada. Bid#. L. Richmond, Ada. Bldg.) In Laursen, Ada. Bldg. } Turn ember 9, 1966 A. D'Alonzo, M.D. .leal Division tours Building 11400 mington BSTOS Tcuspmomc aha Com o-msooo C-C CZZ.1 encloied subject aatter ms developed to inner your letter Ko.ember 8, 1966, concerning asbestos. Humber of full-time insulators: Chambers Vorlca Construction Engineering NfcC 18 40 Total 58 lumber of eaployeei doing part-t.'ne insulating: Chambers Works Construction Engineering KhC 23 0 Total 23 U61 Three most prevalent type insulating materials used: DUP 0900716 T"Uhheirbaeaestoile" Fiberglass Wool ^ j-- _ ~ C. L CL V t U / 1QCF HASKS "ORY \ :ember 9, 1966 A. D'Alonzo, K.D. >estot Spraying of insulating materials: Done rarely; practically nil. Baploys "Limpet," an asbestoscontaining insulating material in a vet form while being sprayed. umber of cases of the following diagnoses; . 1. Asbestosis 2. Mesothelioma 3- Carcinoma (among insulators) 0 0 0 Preventive measures or safety equipment required: 1. Sawing insulating materials': All power driven cutting machines are used in a special room. The atmosphere is exhausted by e Torlt Cyclone Collector. Air analysis for dust and asbestos reveals ltvels are well below presently eetablished threshold safsty limits of concentration, five million particles/ m3. 2. Removing obsolete insulation: Hone. 3- Spraying insulating materials: This is only done in a remote area far removed from operations. The spraying modality is infrequently employed. Yhen used, the operator wears a slmpls dust respirator mask and works with the wind to his back. All other personnel are prohibited in and around the area at the time of spraying. hough relatively simple replies have been made to your stioanalre, additional explanatory information is in order. letter to you of August 19, 1966, spelled out the names of loyees who have worked as pipe-coverers, their A.S.S., and ir medical classifications (or other health status). This ered the years 1950 through 1965* Included was a list of >estos-containing materials known to be used at this site. CUP 0900717 Fsge 3 December 5, i960 C. A. D'Alomo, M.D. Asbestos To supplement that letter end to elaborate further on each question la your questionnaire, X tubalt tat following: . Occasionally ntcbsnlcs froa other crafts art used as part-time Insulators. These men can vary froa day to day but practically all mechanics get sane exposure to asbestos during field vorx. There is constant handling, cutting, installation, removal and replacement going on to varying degrees by stay employees vho are not classified as plpecoverers. C. It Is difficult to determine, with any degree of accurecy, the most prevalent type aabestos-containing insulation matarlal used. Oreat quantities of asbestos-containing materials are used on Chambers Vorxs. These materials coas In any number of sixes, shapes, rolls, drums, mixtures with other nonasbeatos-containing materials, wet, dry, powdered, paper, siding, floor covering, cloth, etc. Thus to aseaee quantity la difficult when one triea to compare. The type used for the insulation, ita thickness, handling, locale, and means of application are all factors In the assessing. More than ons supplier is used to obtain our materials and tha type material used varies with the Chambers Vor:cs Construction group and the Chambers Worts Engineering MfeC group. Baaed on quantities purchased for use by tha latter group during 1365 as coepared with 1366, there is a distinct over-all decrease in use in 1966 of asbestoa-containing materials. X. With s total of 1,420 wage roll men in Class XX, XXX or XV, ICO are to classified for pulmonary reasons. Of ttua 100, two art pipecoverare. (Sea letter of 8/19/66.) Since the year 1950 through 1966 to data, wa list 1,319 aoployees as deceased. Of thaae, 130 died froa pulmonary reasons and of this 130, 53 war# froa carcinoma of the lung. Of the total deaths, only 5 ware ever plpecoverers. One of theta insulators died listed as "cor pulmonale'--tha remaining 4 ware nonpulsonary causes. .l'*r*eld, Jr., M.D. Director, Medical Division Enclosures (3) t>Vt 0900718 mdzcal CLuaznemot or wax xou xxtujuxs _______________ zxClMl ciui in out zr ' Total AJl_Cgu 1,043 375 __________2 1,430 Mubitt XfiUODl . . 36 U J& 100 Ttlf 1950 1951 1952 1953 195* 1955 1956 1957 1958 1959 I960 1961 1962 1963 1964 1965 1966 to dot* Total goUl 51 \ 5 62 4l 67 6l 88 73 79 68 79 86 100 100 84 118 108 1.319 rulaoBanr 2 2 5 2 3 .8 6 5 5 9 14 9 8 15 10 18 _2 130 CA of Lone (2) (2) (2) (2) (2) (5) W (2) (2) (3) (5) (1) <*) (7) (3) (6) Ml (53) DUP 0900720