Document KKoDk47YyL6m8ZnNJZVVnNeQ

PLAINTIFF'S EXHIBIT DUP-700 t Ceeembsr 21, 1967 CC: S. 8. L H. 0. IBoyce J. C. ILang R. X. >Mason V. c. C. J. 'IL< a4vTrsIPnee, Jr. R. J. fHaa TO: T. H. KACKIX p. FROM: I. X. KEUPER DUST EXPOSURE - SUR7ZT RESULTS AND POLICT RECOffiSIICATIONS W recently concluded the asbestos dust survey whieh ns eondueted at Chaabars Works Construction over tha past year. Tht surrey ns performed- under tha guidance of A. L. Lined, Kedieal Saetion, Chaabars Works Riant. Results of tha environmental surrey ahov that eaployeaa ara being exposed to a total dust partiele count that does not exceed 1 per cent of the currant Threshold Lialt Value (TL7) established for asbestos dust by the Aasriean Conference of Governmental Industrial Hygienist*. These results were obtained in shops where dosigned ventilation systems ware installed on all power equipment and a controlled cleanliness program existed. Tha total particle count is many orders of magnitude lass than tha established TL7 of 5,000,000 partieles ,/ par cubie foot for asbestos dust. a Tha acquired results would indicate that presently we.jj net hare a problea of concern. However, Federal and State legislation enacted over the past few years has placed on the eaployer the burden of proof for continuous eonforaaneo with established TLV's. Zn view of this responsibility snd trends in decisions of compen sation claims, it becoese imperative that an effective industrial hygiene prograa be adopted. The need for sueh a program becomes acute when ore-employment medical examinations ara not required for the employees. 107 DUP 0900896 DU 022294 f. H. Kaekie December 21, 1967 Vt With the aboOe mentioned responsibility In mind, the eurviy results would indicate that a permanent quality control program b* inltiatad to provide not only quantitative data for Internal evaluation of dust control efficiency but also to document air quality analysis needed to demonstrate confomance with cstabllshtd TLT's and provide effective defense in litigation easts, environ mental monitoring once a month should suffice for general work; arias. If circumstances should arise which involve unusual dust generation, special monitoring will be required to evaluate the potential exposure severity. Equipment performance and ventilation specifications should be established for effective dust emission control. York procedures and protective equipment requirements also should be Initiated. Ye request that you consider adopting the following recommendations to be applieds all eita locations to aequira satisfactory environ ments from dust exposure: 1. Maintain an air sampling program with documented results, this Is essential for the over-all health exposure and possible litigation suits. Perform random personnel-sampling on a frequency ef ones a month at eaeh field shop location where there is knowledge exposure to aobestoo dust. The slto Safety Supervisor should bo responsible for acquiring the air sample and all technical information associated with the sample. Arrangements can ba made through Dr. Lapp, Ciroctor, Haskell Laboratory, for a qualified interpretation of tho aaaplo. Results should thon bo doeuaantsd at eaeh site loeatioa. To acquire the sample, the following instrument is reeer-e.-.isd: "Mighty-Mite Air Sampler" - Unieo Model 4L0-A-SP with miereimpinger. The approad-mate cost of tha instrument is $180.00. 2. Equipment a. Isolate power equipment operations in tho shops from other shop facilitioo. b. Install exhaust ventilation on all power equipment to remove dust particles at point of origin and ' maintain atmosphere total dust count below tho / Threshold Limit Value of 5,000,000 partlclaa per cubic foot. All possible dust from cutting and shaping functions should bs collactad by an effective exhaust and collector systems Collector should not ont off eolloetod dust particles to tho atmosphere. nr \ r; DUP 0900897 DU 022295 H-Hisr '"iaBSiwiiOTW 3 f. H. ?kcicis December 21, 196? t Applied etethoda In forking Vith Materials a. Initiate a eor.trollad shop cleanliness program. Use a vacuum to remove dust particles from shop equipment, work tables, ledges, floors, ete. Hand cutting should be done so that vhererer possible scrap and dust particles fall into a container. b. Open eartone of material with care. Dust is shaken loose from shipping abuse and is one of the most severe sources of asbestos dust quantities with which wo are presented. The carton can be vacuumed prior to opening by cutting a hole la the earton and introducing a vacuum hose. c. Asbestos cements must be handled with great care. A system to avoid man handling and miJdng by hand is beneficial. This say be accomplished by procurement of the cement in small plastic bags where water say be introduced and the cement kneeded without dust exposure. d. The apray applleatien of materials containing asbestos fiber should bt prevented. Several states have enaeted legislation outlawing this application of Limpit insula; lng material. I*. Smoking should bo prohibited in shops with asbestos dust exposure and when operating tools and equipment performing work which produces dust. 5. Respiratory Protection Severe conditions may dictate the need for respiratory protective devices. However, every attempt should be cade to avoid those devices since they never adequately protect tha people in adjacent areas. Respiratory protaotivs devices art. whan required, an admission of a problem. Sines the lav accepts even a casual exposure as hasardous, the environment should bo maintained so that protoetiT* respiratory devleaa etn bs avoided. Approximate eost of surrey - $2200.00 Equipment Purchased 330.00 ' rotation 1S70.00 (Dr. R. J. Kartells - University of Pittsburgh) nr. i DUp 090039a DU 022296