Document MZEy8xmQG9x0gQkML2788nG7

& Q> MEMORANDUM To: Mr. R, F. Hunt Mr. R. S. Jones Mr. G. B. Leroy Mr. W. R. Thompson Mr. F. A. Woods April 26, 1972 From: Fred Williams Subject: M---a--c--h--i-n--i-n--g---A--s-b--e--s-t-o--s---M---a--t-e--r-i-a--ls----in----B--u--i-l-d-i-n--g----7-4--0-------1--1--2--8 / The attached memo shows results of air samples that were collected while machining 3" asbestos discs in Building 740 - 1128. Not only do the air samples show the operation to be a potential health problem to unprotected operating personnel, but personal observations revealed that even though precautions were taken to contain the cuttings on newspapers, a serious contamination problem exists at the machine. This con tamination can present a potential health hazard to others in the area. Realizing that this is not a continuous operation and that the asbestos exposure to operating personnel may be kept within regulations that have been ' established which state "concentrations not to exceed 10 fibers per milliliter may be permitted up to a total of 15 minutes in an hour for up to 5 hours in an 8-hour day," the potential exists for much greater concentrations to become airborne, especially, from the contaminated machine. If it is necessary to do asbestos machining in-house, it is recommended that a vacuum cleaner capable of containing dusts from asbestos be utilized near the cutting edge of the machine to pick up dusts during machining and to clean up after machining is finished. A wet-type collector would be highly desirable. Plans should include isolating the asbestos cutting and machining in an area with a filter exhaust system or replace asbestos with a less hazardous in sulating material. buria I . Asbestos wastes should be put in plastic bags and sent to landfill for F .Williams/ebc Att. UCC 000327 Industrial Hygienist MEMORANDUM To: Mr. R . F . Hunt Mr. R . S. Jones Mr. G . B. Leroy Mr. W. R. Thompson Mr. F. A. Woods April 25, 1972 From: Industrial Hygiene Subject: Air Sampling Results During the Machining of "Marinite 23" / SUMMARY Two "personal" air samples were collected during a machining operation involving asbestos containing material. The operation was performed in the Engineering Measurement and Control Shop located in Building 740, room 1128. Both air samples show results that are in excess of the Threshold Limit Value of 5 fibers per milliliter greater than 5jj in length. DISCUSSION On April 12, 1972, the Industrial Hygiene group monitored airborne asbestos fiber incident to a machining operation performed on a lathe in Building 740 - 1128. The methods and equipment are normally used for the machining of a metal. Due to the nature of the operation performed, the operator was required to remain in close proximity to the equipment and material being used. The material being machined was "Marinite 23," a Johns Manville product containing asbestos. The "Marinite 23," one-inch thick, was cut into circles 3 inches in diameter on a separate piece of shop equipment. This operation may also require the monitoring of airborne particulate during the time in which it is being performed. The 3-inch diameter circles were secured in the lathe chuck and an area 1.75 inches in diameter was machined from the center. During the entire operation, a total of 41 circles were machined by^ who wore respiratory protection. The samples were collected by the use of "personal" air sampling equipment. The sample collecting device was suspended around the neck of the operator as close to the breathing zone as was practical. The airborne fibers were collected using membrane paper. Type AA, 0.8jj pore diameter, white, 37 mm in size, at 2 I pm flow rate. The samples were delivered to the R&D Environmental Health Laboratory for anal ysis. UCC 000328 2- RE5ULTS AND CONCLUSIONS The attached data sheet shows asbestos fibers to be airborne in concentrations greater than the Threshold Limit Value of 5 fibers per milliliter of air greater than 5jj in length as a result of the machining of "Marinite 23." The results indicate that immediate attention should be given to the continued health protection of the operator involved. R .O.M./ebc Att. UCC 000329 MACHINING OF "MARINITE 23" BUILDING 740, ROOM 1128 Date: A/\2/Tl Sampling Time Flow Rate 8:55a.m. -9*10 a.m. 2 1pm 9:12 a.m. - 9:18 a.m. 2 1pm Sampled by: R. O. Midkiff / Fiber/ml >5p in length Pcs. Machined 8.7 28 8.0 13 Operater: Respiratory Protection Dustfoe 77 Respirator UCC 000330 Mr. J. M. Butcher Mr. R. F. Hunt Mr. A . C. Kemerer Mr. A. faulty Mr. M, E. Perty April 2j, 1-72 Gentlemen: I am of the opinion that serious consideration should bn 9! n to nploc9 asbestos and fiberglass Insulation In fi Technical Cantor with Ion haxardou materials. Tha hazards associated with asbestos have boon hiyhllghted by C :HA but old, hootad fiberglass Is, In my opinion, almost equally as bad * especially from acute conditions created by the dusty, short fibers that became airborne during demolition. There is an (mutation "`Ceromospray Bulk Fibers' that may meet most of our requirements. It contains no asbestos and I was informed by Charlie Carman that practically no dust was observed during a demonstration at their site, information may be obtained from; Atbestosproy Corporation 605 Brood Street Newark, New Jersey 07102. Yours very truly, F .vVHIiame/ebc Industrial Hygienist UCC 000332 INTERNAL CORRESPONDENCE UNION CARBIDE CORPORATION ?7o park avenue, new york, new york 10017 To (Hast*) Dlrision IwadtB Copy to Mr. N. H. Ketcham Chemicals and Plastics South Charleston J. T. Brumley H. H. Frazier B. L. Murray J. E. Neff R. E. Peele Fred Williams D. E Deese S. V. Lucas C. S. McKinley. M. D R. W. Cope F. J Garcia-Sharp Ocio Otigfoatiitgt>*pu Aniwiting Uttor dalo Svbjod March 16, 1972 Medical Department .f I have received the minutes of the meeting on Measurement of Employee Exposure to Asbestos to Meet Requirements of Proposed OSHA Standard which I understand resulted from urgent requests from R. E. Peele and B. L. Murray for prompt action on the subject in question. It is appropriate that the meeting was held, but unfortunate D. E. Deese and others had no opportunity to contribute to the deliberations. While this might suggest that the decisions for action derived from the meeting really apply only to the Kanawha Valley plants, I think the decisions are sound and deserve a broad based application throughout Group I. I would urgently advise that each location in Group I be included in this activity because I am sure it is an area which will be subject to close scrutiny in the event of any plant inspections. Careful study now and appropriate corrective action for any unsatisfactory conditions found in the study will go far toward avoiding citations by OSHA. . CUD: lk Very truly yours, c. C. U. Dernehl, M. D. Associate Medical Director UCC 000333