title: Blood benzene concentrations in workers exposed to oxygenated fuel in Fairbanks, Alaska.
abstract: OBJECTIVE
  In November 1992 residents of Fairbanks, Alaska became concerned about the potential health effects of an oxygenated fuel program during which 15% (by volume) methyl tertiary butyl ether (MTBE) was added to gasoline. To address those concerns, we earlier completed a survey of occupational exposure to MTBE. We conducted a follow-up survey of workers' exposure to benzene from gasoline in Fairbanks.
  
  
  METHODS
  Cross-sectional exposure survey.
  
  
  METHODS
  We examined blood concentrations of benzene from a convenience sample of workers taken in December 1992 during the oxygenated fuel program and from another convenience sample of workers taken in February 1993 after the program was suspended.
  
  
  RESULTS
  In December, the median blood benzene concentration of samples taken from four mechanics after their workshift (postshift) was 1.32 micrograms/l (range, 0.84-2.61 micrograms/l), and seven nonmechanics (drivers and other garage workers) had a median postshift blood benzene concentration of 0.27 microgram/l (range, 0.09-0.45 microgram/l). In February, nine mechanics had a median postshift blood benzene concentration of 1.99 micrograms/l (range, 0.92-3.23 micrograms/l), and nine nonmechanics had a median postshift blood benzene concentration of 0.26 microgram/l (range, 0.2-0.46 microgram/l).
  
  
  CONCLUSIONS
  Mechanics had higher blood benzene concentrations than did nonmechanics, but further study is needed to determine the impact of the oxygenated fuel program on exposure to benzene.
authors.affiliation: Centers for Disease Control and Prevention (CDC), Atlanta, GA 30333, USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Moolenaar
authors.forename: B J
authors.initials: BJ
authors.lastname: Hefflin
authors.forename: D L
authors.initials: DL
authors.lastname: Ashley
authors.forename: J P
authors.initials: JP
authors.lastname: Middaugh
authors.forename: R A
authors.initials: RA
authors.lastname: Etzel
mesh_terms: D001554:Benzene / Q000032:analysis*; D015986:Confounding Factors, Epidemiologic; D003430:Cross-Sectional Studies; D006801:Humans; D008738:Methyl Ethers / Q000009:adverse effects / Q000097:blood; D016273:Occupational Exposure / Q000009:adverse effects / Q000032:analysis; D014186:Transportation; D001335:Vehicle Emissions / Q000009:adverse effects / Q000032:analysis*
chemical_list: D008738:Methyl Ethers; D001335:Vehicle Emissions; C043243:methyl tert-butyl ether; D001554:Benzene