Document JrDyjKv9E88wrdpexY1Rmorbv

INTERIM A,L CORRESPONDENCE JUL 2 ~ 1985 UNION CARBIDE CORPORATION P C BOX BOOd. 5QUTH CHARu.EETON. V. V 2530- siucones and urethane intermediates SOUTH CHARLESTON ECANT J. R. Dean P. D. Gossage B. G. Stump June 28, 1985 C. E. Fry D. A. Gosselin R. W. Holland, Jr., M.D. D. J. McNeil T. G. Swanson Managers Department Asbestos Exposure Effects Potential of Non-Insulator Crafts Asbestos dust measurements in the plant are consistently below OSHA permissible exposure limits (see attached summary). However, when we detect even a fraction of those limits in our air samples I get a feeling of apprehension because I question if any level of inhalation exposure is safe in absence of respiratory protection. Airborne asbestos dust measurements are expressed in terms of the number of fibers that are 5 microns or more in length in one cubic centimeter of air. Numerical estimates should be evaluated with caution according to OSHA, because air concentrations used are a matter of convenience and "should not be evalu ated without interpreting the meaning of the units.For example, the OSHA permissible limit for an 8-hour day is 2.0 fibers (5ji or longer) per cc of air. This may seem like a small amount of asbestos which is conventionally determined using a microscope, but in my opinion represents a potentially hazardous condition. Ip physical terms 2.0 f/cc equals 2,000,000 fibers per cubic meter of air (f/nr). Humans inhale about one cubic meter of air per hour, depending on degree of activity. Thus, at this concentration a worker would inhale roughly 16,000,000 fibers 5 microns in length over an 8-hour day disregarding the possibility of an infinite number of shorter fibers being present under some conditions. Based on our measurements such conditions rarely exist in plant workplace environments. Nevertheless, existing, natural defense mechanisms alone (respiratory system mucous and nasal hair) may be inadequate for even concen trations at the lowest reliable detection limits. I feel good about the manner in which exposure control has improved among Insulator craft groups due to establishment and maintenance of adequate standards. My feeling of apprehension, however, is due to concern about potential chronic health effects among all other crafts whose exposure concen tration may be comparatively lower, perhaps less frequent but, in any case, generally without the benefit of respiratory protection. (1) Bureau of National Affairs, Occupational Safety & Health Reporter. November 11, 1983. UCC 008287 2 As you know, total elimination of asbestos-contained materials in the plant is unlikely and impractical because of cost, safety or lack of suitable replace ment material-reasons. A gasket failure, for example, due to use of an un suitable substitute could potentially cause a far more hazardous condition than any conceivable one related to use of asbestos-contained gasket material. Occupational exposure to asbestos can be effectively controlled in most plant situations by using wet-method handling procedures and an appropriate dust mask commonly used by Insulators throughout the plant. I urge you to consider taking action necessary for strict enforcement of mandatory use of respiratory protection by all employees who use or handle any asbestos-contained materials, e.g., gasket fabrication/removal/disposal, brake lining replacement or even inspections, insulation removal/disturbance related to a wide variety of job tasks performed by various craft groups, etc. Such action would virtually prevent occurrence of any inhalation exposure. Please call me if you have any questions or comments. Thank you. WCY:bl Attachment UCC 008288 JOB CLASS!FICATION/EEO CODE CLASS AUTOMECH BLKSMITH BLRMAKR C DRIVER C FMAN C MAINT C OPER CARPNTR CAR UNLD CHEMIST CORRTECH ELECTN XPDITR EN6R F S ATT FMAN GEN FMAN H E OPER I H TECH INDHYGST INSP T&I INST MECH INSUL LAB ASST LAB TECH LABORER MACH METL WKR MILWRT OPER PAINTER PIPE FITR P M OPER P L MECH Q C ANAL KEL OPER RIGGER SALVMECH SD BLSTR SR CLERK S&R CLK SUPRVISR TOOL CLK TK DRIVR UTIL MECH WELDER WGHMASTR --JO--B--C-O-D-Er u B C 0 D E E 0E 40 41 42 43 H 5Z H 9Z H 9Z1 J4Z BFH2 JMZ3 H 1Z2 HDZ KX Z C 3Z DXZ2 HBZ GX2 C7Z LSZ BFH 1 BDZ H2Z DXZ 1 CPZ JFQ HAZ HQZ D3Z1 D3Z2 KBZ HSZ1 HVZ HSZ2 H 1Z1 HN Z HRZ HXZ 1 H XZ2 DFZ H1Z3 HLZ JMZ 2 HXZ GXZ GXZ2 BFZ GXZ3 J4Z 1 JMZ 1 H7Z JGZ Automobile Mechanic Blacksmith Boilermaker Non-Plant Truck Driver Non-Plant Foreman or Shift Leader Non-Plant Maintenance People (Contract, SCWTW, Etc.) Non-Plant Operator Carpenter Car Unloader Chemist Corrosion Technician Electrician Expediter Engineer Fire Station Attendant Foreman, Supervisor of Hourly Personnel General Foreman, Shift Super Heavy Equipment Operator Industrial Hygiene Technician Industrial Hygienist Inspector TAI Instrument Mechanic Insulator Laboratory Assistant Laboratory Technician Laborer Machinist Sheetmetal Worker Millwright Operator (Chemical, Plant 514 Only, Including Pumper Operator) Painter Pipefitter Pipeline Machine Operator Pipeline Mechanic Quality Control Analyst Vacation Relief Operator Rigger Salvage Mechanic Sandblaster Senior Clerk Stores A Receiving Clerk Supervisor Non Technical (Does Not Supervise Hourly People) Tool Clerk Truck Driver - Plant 514 Only Utility Mechanic Welder Welghmaster UCC 008289 SUBJECT ClHRKLES 3.2.2.3 LINES 400-490: PERSONNEL DATA Entries and Comments *- __ i j Cannot be blank; Z=none. If a respirator is worn, use the appropriate code letter from the following list: A-Supplied Air, Full Face Mask B-Supplied Air, Full Face Mask, Positive Pressure Demand C-Supplied Air, Half Face Mask D-Supplied Air, Half Face Mase, Positive Pressure Demand E-Supplied Air, Abrasive Blasting Hood F-Gas Mask, General Purpose . G-Gas Mask, Specific H-Cartridge, Dust, Nuisance, Full Face Mask I-Cartridge, Dust, Nuisance, Half Face Mask 0-Cartridge, Dust, Specific ' K-Cartridge, Acid Gas, Full Face Mask L-Cartridge, Acid Gas, Half Face Mask M-Cartridge, Organic Vapor, Full Face Mask N-Cartridge, Organic Vapor, Half Face Mask 0-Cartridge, Specific, Full Face Mask P- Cartridge, Specific, Half Face Mask Q-Dust Mask R-Dust Mask-Disposable S-Dust Mask, Jqxic T-Supplied Air, Hood X-Other Z-None UCC 008290 5>03| oq oo caooqooo oqoodooqooa oqooqoocooo oooooooao'iiQoooooraoioooooodoaoocooaooiifoOl^owooowaoMCofMMo< iOOOOOOQOOOOO^OOOOO OO cjoaoaoooraaoojooolooooo 1 lj1 rjrviMrgrj(Nifvrsi(Sy NMNitVMVNMNIMruN^ apooooaooorJooooooiaoQooooooooooocaooooooooooooooooc' odoOCjONfHNKlt<iO^lfi1t-r<4-NOOO0O'0^rt^N'<,.rNtt>'0't^^^WOrnrg4 4loa^KN ^inWQrOOnrQjOr-Ot"*^^OK^OT*aarKOtrCij^jO"rdJMqiOKi(O,'iiMb<tf0'O^-^a5OM^OOMOKoirdy(o\i^Or-Or^^ONO-oO^lOON{O> Oin Knt Mr]Qf'r0a< COj 'OONr^OO i-sf 29 1 U4 Zu49 fauXi j oj *! |v nJ ifl io O Q (.*) n Q O N *o o ^ o O- o^ifOfOto*otniriioiniioiAkOrin i;i o o n o O o to m ia iri ia it v*i in i_ 4_^ A1 I 1 I 11*j< * 1 1 ! 1 v3| p V*l Ui * VI * A a 4 -J o a * 4 1 a LJ o 4 4- V| 4 iM ai 4 vy 4 4 f>* f> 4 Oo 4 4 nn m ^000000<1<-- <4 * 4 oa 4 o tq o o o o o o o Cj o o o o o o o o o 4 4 O Oi * r 4 4 4 N> N 4 4 M4 4 ad * * 4 -1 4 o 4i 4 4 4 ,4 >- 4 4 4| OrJ a 4 4 . 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