Document MeBpZqkM32znwOZJnyV9eYXj

Mr. C. Fr&nkeriberger Linde Division Speedway Factory 4801 West 16th Street Indianapolis, Indiana 46224 Mr. J. E. Bertraid Mr. K. Earl Mr. D. Jenkins Mr. R. M. Neary Mr. R. Oldford Mr. H. L. Phillips Mr. L. G. Suelter Dr. J. J. Welsh/Dr. K. S. Lane August 23, 1974 Medical Department Dear Mr. Frankenbergen A follow-up industrial hygiene survey to evaluate the changes made in the acetylene cylinder filling building was performed on August 6-7, 1974. The results of the air samples for asbestos are shown on the attached table. At the time of the first addition of asbestos to the mix tank it was noted that the exhaust blower for the shredder was inoperative. It was decided to take samples anyway. As can be seen the results are 2-3 times the ceiling limit value of 10 fibers greater than 5 microns per milliliter. Respiratory protective equipment was worn by the operator and myself. The time of this operation requires about 10 minutes. UCC 009402 ...-- K Mr* C* Frankeriberger 2* * August 23, 1974 Foliow-up samples after the blower was repaired Indicated concentrations at the limit value of 2 fibers* This also points up that routine periodic checking of equipment of this nature should be performed. It is also questionable whether or not is is wise to perform these operations a&en such conditions exist. The shredder itself could be improved so that the present methods of charging after breaking the bale outside the unit could be eliminated* All other operations checked and the general area samples were below the limit of 5 fibers and the limit of 2 fibers which becomes effective July 1, 1976. For the present it is suggested that these areas be chedked oma monthly basis. If results continue to be below limits, then a six month interval would be sufficient. It would also be desirable to sample when a cylinder is cut open in the machine shop* This operation has not been performed during one of my visits* With regard to cylinder dean-out 1 would suggest mounting two or three sampling heads connected to a cefatral vacuum source to determine levels in this building* 1 would not expect to find much if any since this is predominantly a wet system. However, the data should be collected for record purposes. This was discussed with Messrs. Phillips and Wooldridge* &21696 Mr* C* Frahkeriberger -3- August 23, 1974 The rest of the plant was inspected as time permitted and no other operations were noted where air sampling was felt necessary for evaluation* Thanking you for your courtesy extended, I remain. Very truly yours. LJLslk Attachment Leo J. LaFrance Industrial Hygienist UCC 009404 A2 1 697 Asbestos in Air Concentrations Unton Carbide Corporation Linde Division Speedway Factory Indianapolis, Indiana August 6-7, 1974 Location Asbestos Number of Fibers 5 microns t>er milliliter Acetylene Cylinder Fill Building New Shredder room operator 30 New Shredder general area 20 New Shredder room on operator 2 New Shredder room general area At top of mix tank ,* 0 Plug drill (on operator) 1 Top clearance Inspection (on operator) 1 Wire brush fill plugs (on operator) 1 General area-walk around depts. 1 General air-top of power cabinet below old rest room 1 Remarks Exhaust blower inoperati Exhaust blower in operation While charging asbestos usual operation usual operation usual operation usual operation V A21698 UCC 009405 '