Document ppp2zkJ1ZB80L0v7V4VQm8YXX

Inter Ollice Personnel end Organization Staff Mr. J. D. Carney, Manager Sandusky Plant May 28, 1980 oe G. L. Cook R. D. Esch H. E. Snedden, M. D. D. Vaughn ' Subject* Industrial Hygiene Studies - Asbestos and Cotton Dusts As requested, the Industrial Hygiene Services Seotion evaluated employe expo sures to airborne asbestos fibers during maintenance repair of the #2 power house boiler. This monitoring was done in accordance with a previously extended OSHA citation which cited failure to perform employe asbestos exposure monitor ing during maintenance repair of powerhouse boilers. In addition to the powerhouse, samples were collected for asbestos fibers in Department 653 during assembly of water temperature switch gaskets and for cot ton dust in the oil filter build-up area. The results of air sampling, which were previously submitted to Mr. G. L. Cook in draft form per hiB request, are outlined on attachments I through 111. All asbestoB exposures were shown to be below permissible limits. Powerhouse employes would therefore, not be required to wear self-contained breathing apparatus during wet asbestos gasket demolition. However, as a matter of good industrial hygiene practice, employes should wear approved negative pressure air purifying dust respirators. Medical monitoring of powerhouse employes potentially exposed to asbestos must be continued. Precautionary sign posting, waste disposal, contaminated clothing and housekeeping requirements were fol lowed and must also be continued pursuant to 29 CFR 1910.1OO1. Regarding cotton dust in the oil filter areas, both cotton waste suppliers (Leigh Textile and Newco Fiber Co.) have informed our Toxicology Section that the cotton material in question iB "washed". Consequently, the newly promul gated OSHA cotton dust standard would not apply to Sandusky Plant oil filter operations. Additional details are outlined Attachment David S. Carruthers Industrial Hygienist Industrial Hygiene and Toxicology Department Employe Health Services SCF-FORD-1979 * PRODUCED BY FORD DISCUSSION A. Powerhouse Tw> employes entered the #2 powerhouse boiler to remove an asbestos rope gasket. One employe remained at the boiler entranoe as observer and waste handler. All employe asbestos exposures (Attachment 1) were shown to be below the current permissible exposure limit (PEL) of 2 fibers per eubic centimeter of air (f/cc). Further, employeeight-hour time weighted average exposures (TUAE) were below the OSHA program directive that requires medical examina tions at or above 0.1 f/oc. Based on sampling results and observations of work practices during this process, the following items muBt be performed when asbestos rope gaskets are removed: * 1. Continue the wet method of asbestos demolition by hosing the boiler rope gasket with water prior to removal. 2. The monitoring results indicate that a negative pressure air purifying respirator approved for use with asbestos dust will provide sufficient protection. Therefore, the -self-contained breathing apparatus (SCBA) is not essential. 3. Although the latest monitoring results indicate employe exposures below levels at which medical monitoring is required, past employe exposures cannot be defined. Since the likelihood of excessive employe exposure is present, it is recommended that medical monitoring of power house employes be continued. 4. Asbestos waste disposal and contaminated clothing handling procedures as well as posting precautionary warning signs must be continued when ever asbestos demolition occurs. 5. Every effort must be made to substitute non-aBbestos materials where applicable such as the #2 boiler replacement gasket (A-Best products, Style 500-1). 6. Any additional requirements under 29 CFR 1910.1001 such as housekeeping and monitoring must be followed. B. Department 653 One employe who assembles an asbestos laden gasket (ESF-M8G55-A) on water temperature sender switches was sampled for asbestos exposure. Ab shown on Attachment II, no detectable levels of asbestos were found. No apparent health hazard is present from this assembly. Medical monitoring of employes 5.6 not required. Should a process change ocour that may increase potential for asbestos exposures, a resurvey of this operation should be performed. C. Oil Filter Area Pursuant to the recently promulgated cotton dust standard, a general area sample was collected on the Gilman Innercan assembly. Additional samples could not be collected because of production delays. The sample results indicate airborne dust level below the then existing PEL. sOO7 Oil? ` PRODUCED BY FORD DISCUSSION -2- On March 27, 1980 OSHA reduoed the PEL by 5 percent which would indicate excessive exposure levels. However, our office has been informed by our suppliers that the cotton used in oil filter manufacturing is nprewashed" prior to shipment, and therefore, the hazard to employes is significantly reduced. Based on this information, the cotton dust standard does not apply. For comparison purposes, the PEL for nuisance dust baB been included. SOS' PRODUCED BY FORD ATTACHMENT I INDUSTRIAL HYGIENE SERVICES SECTION INDUSTRIAL HYGIENE AND TOXICOLOGY DEPARTMENT EMPLOYE HEALTH SERVICES SANDUSKY PLANT Powerhouse - Department 6*41 February 20, 1980 PERMISSIBLE OCCUPATIONAL EXPOSURE LIMITS TO AIRBORNE CONTAMINANTS: Contaminant . 8-Hour Time Weighted Average Exposure Limit (TWAE) Asbestos 2 fibers/cc RESULTS Employe/Description Operation Sample Time D. E. Hammer 284-32-6075 Inside No. 2 boiler (63 min.) D. V, Iden 293-34-1318 Inside No. 2 boiler (62 min.) - Nielson 298-12-9588 Operating coal hopper (79 min.) J. Thayer 299-24-9135 Observer end waste handler (68 min.) at boiler entrance General area bample on desk (ambient) #(52 min.) Average Airborne Concentration Asbestos (f/cc) 0.041 ND(1) 0.045 0.29 ND . DATA RETRIEVAL NUMBERS: DSC-8?0 through DSC-874 INSTRUMENTATION: Bendix BDX-41 personal sampling pumps with open faced membrane filters in plastio cassettee. ANALYSIS: Ford Motor Company Industrial Hygiene Laboratory; NIOSH fiber count method utilizing phase-contrast microscopy. ANALYSES PERFORMED BY: L. LaTorre, Senior Industrial Hygienist ND^ asbestos fibers "not detected" at an analytical sensitivity of )05 f/cc FOD lr.du:'ri;l I-!."'.* ' ' tabards'? Ac: .. . .. L</i American Indu.trial H, ;una Association B:07 0340 ; 1 PRODUCED BY FORD ATTACHMENT II industrial hygiene services section INDUSTRIAL HYGIENE AND TOXICOLOGY DEPARTMENT EMPLOYE HEALTH SERVICES SANDUSKY PLANT Department 653 February 21, 1980 PERMISSIBLE OCCUPATIONAL EXPOSURE LIMITS TO AIRBORNE CONTAMINANTS: Contaminant 8-Hour Time Weighted Average Exposure Limit (TWAE) Asbestos 2 fibers/cc Employe V. Willis 412-56-4972 RESULTS Operation Sample Time- Water temperature switch-gasket assembly (60 min.) Average Airborne Concentration Asbeetos (f/cc) DATA RETRIEVAL NUMBER: DSC-878 INSTRUMENTATION: Bendix BDX-4l personal sampling pump with membrane filter in open faced plastic cassette ANALYSIS: Ford Motor Company Industrial Hygiene Laboratory; NIOSH fiber count method using phase-contrast microscopy ANALYSIS PERFORMED BY: L. Latorre, Senior Industrial Hygienist ND('l1') asbestos fibers "not detected" at an analytical sensitivity of .004 f/oc .. row Mo:?* ccv-\\ny Industrial H," hr..! 0 " Amsricsn li.dusli.J As: ion IRQ3007 0541 PRODUCED BY FORD ATTACHMENT III INDUSTRIAL HYGIENE SERVICES SECTION INDUSTRIAL HYGIENE AND TOXICOLOGY DEPARTMENT EMPLOYE HEALTH SERVICES SANDUSKY PLANT Gilman Innercan Assembly Line February 21, 1980 PERMISSIBLE OCCUPATIONAL EXPOSURE LIMITS TO AIRBORNE CONTAMINANTS: Contaminant Cotton Dust (as measured by vertical elutriator) Nuisance Particulate 8-Hour Time Veighted Average Exposure Limit (TWAE) 1.0 mg/vfi (0.5 mg/$& effective 3/27/80) 10.0 mg^i3 Sample Description Area sample on panel of Gilman Innercan assembly No. 1 RESULTS Sample Time (1*8 min.) Average Airborne Concentration Dust (me/M') 0.53 DATA RETRIEVAL NUMBER: DSC-879 INSTRUMENTATION: BDX-41 personal sampling pumps with glass fiber filter in plastic cassette with 17 inch vertical elutriator ANALYSIS: Ford Motor Company Industrial Hygiene Laboratory; gravimetric analysis ANALYSIS PERFORMED BY: V. J. Falzone, Industrial Hygiene Technologist rov) r.oToa co: vn/ JndurliUl I!. i . * 7 ' : - ' I i..d Z Z:. ~ Z;> ?.meiicnn .tlon 007 042 ' PRODUCED BY FORD TODAY* s-hn-BO /vf ` . Data Sheet ' /Tff^Pato Typed %Q ^ A/j To Vriter for* 'j {^Signature & Maste* Erf To Roger for Approve! 5-off rvf'Id Vriter for t3-d-'r "&0 copies ' &} JLalod out 3fl-0 a fSa^icUjuwLuj ty&freAt^C&CCvvL \y<Mbc 3007 0343 ' PRODUCED BY FORD