Health hazard evaluation report: HETA-92-0316-2339, Washington Metropolitan Area Transit Authority, Washington, D.C.
Weber-AM; Hurrell-JJ Jr.; Moss-CE
NIOSH 1993 Aug; :1-32
In response to a management request, an evaluation was conducted of recurring symptoms in workers in the communications room at the Washington Metropolitan Area Transit Authority (SIC-4111), Washington, DC. Workers in the communications room had reported eye, throat, and upper respiratory tract irritation. Carbon-dioxide (124389) levels ranged from 375 to 510 parts per million (ppm) throughout the sampling period. A number of deficiencies were noted in the ventilation system. Methylene-chloride (75092) was detected as a trace contaminant of a contact cleaner used on a daily basis. Dry itching or tearing eyes, dry throat, stuffy nose/sinus congestion, headache, fatigue and sleepiness were the most common complaints reported by workers. In a follow up evaluation of electric and magnetic fields, one area of concern was near the transformers and the Data Service Units. Magnetic field measurements ranged from 0.1 to 3000 milligauss. Illumination levels ranged from 27 to 460 lux. The authors conclude that no specific health hazard was identified. However, the authors recommend that improvements be made in indoor environment, including balancing the ventilation system, improving lighting and further examining the presence of methylene-chloride.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-92-0316-2339; Hazard-Confirmed; Region-3; Indoor-air-pollution; Air-quality; Cleaning-compounds; Ventilation-systems; Transportation-industry; Chlorinated-hydrocarbons; Electromagnetic-fields; Indoor-environmental-quality
Hazard Evaluation and Technical Assistance; Field Studies
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-92-0316-2339, 32 pages, 36 references