Emission Factor Development for Intermittent Workplace Sources

Details

• Personal Author:
  Conroy LM ; Franke JE ; Scheff PA ; Wadden RA
• Description:
  A study was performed to develop a method for generalizing the design of engineering control of workplace hazards. The authors proposed to develop a library of emission factors, based on field observations, for a series of commonly encountered, hazardous, unit operations. Four types of open tank processes were considered: vapor degreasing, chromium and copper electroplating, offset printing, and wave soldering. A total of 13 evaluations were performed: three tests of offset printing operations, four of degreasers, three of wave soldering and three of electroplating. Determinations were made of emissions from 16 different units which discharged hazardous materials at ten different sites. Each test consisted of 12 1 hour sampling periods and measurements of general and local exhaust ventilation. Average total emissions from three uncontrolled methylchloroform (71556) degreasers were between 0.39 an 0.74 kilogram/hour. Total emissions from a terpene degreaser were 0.69 kilograms limonene (138863) per hour. Methylene-chloride (75092) emissions into the workplace were monitored. Uncontrolled emissions from all three lead (7439921) wave soldering lines in the same space averaged 86 milligrams of lead/hour. The copper emission factor for releases into the workspace from electroplating was 0.5 to 2.7 micrograms/ampere x hour. Daily emission of 79 to 82 kilograms of volatile organic compounds were measured from one print room in a large commercial concern which contained three web fed, heat set lines served by catalytic air pollution control devices. The authors note that the value of the emission factor approach is that the effect of the particular interior space in which the data are collected is removed. The results of the study provided: a compilation of activity based emission factors for the four mentioned processes; a measure of the variability in emissions to be expected from such processes; actual determination of control device performance for each process studied based on an emission mass balance; a generalized basis for estimating workplace concentrations from these types of sources; and a mass balance basis for evaluating control design alternatives. [Description provided by NIOSH]
• Subjects:
  Environmental Monitoring Occupational Health Risk Assessment Safety Solvents
• Keywords:
  Air-quality-monitoring Air-sampling Control-technology Industrial-emission-sources Industrial-hygiene NIOSH-Grant Risk-analysis Solvent-vapor-degreasing
• Series:
  Grant Final Reports
• Publisher:
  National Institute for Occupational Safety and Health
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Final Grant Report
• Place as Subject:
  Illinois ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OEP - Office of Extramural Programs
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-14
• NIOSHTIC Number:
  nn:00228745
• Citation:
  Atlanta, GA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, R01-OH-002804, 1995 Mar; :1-14
• Contact Point Address:
  University of Illinois at Chicago, School of Public Health (M/C 922), Environmental and Occupational Health Sciences, 2121 West Taylor Street, Chicago, IL 60612
• CAS Registry Number:
  1,1,1-Trichloroethane (CAS RN 71-55-6) ; Dichloromethane (CAS RN 75-09-2) ; Lead (CAS RN 7439-92-1) ; Limonene (CAS RN 138-86-3)
• Federal Fiscal Year:
  1995
• Performing Organization:
  University of Illinois at Chicago
• Peer Reviewed:
  False
• Start Date:
  19901201
• Source Full Name:
  National Institute for Occupational Safety and Health
• End Date:
  19941130
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:2d173c0418b3a2b637ce9d54013bf9873376c70366cc9c0c1f54e504ba93051da76583265eed73ecb1c0c7cd39911a3d1adf99a0b825c019a782fcd91b97426f
• Download URL:
  https://stacks.cdc.gov/view/cdc/217854/cdc_217854_DS1.pdf
• File Type:
  [PDF - 343.79 KB ]