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Technical Assistance Report No. TA-79-25, Detroit Canada Tunnel, Detroit, Michigan.

Authors
Schutte N; Tharr DG
Source
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, TA 79-25, 1980 Feb; :1-9
Link
https://ntrl.ntis.gov/NTRL/dashboard/searchResults/titleDetail/PB80192065.xhtml
NIOSHTIC No.
00132240
Abstract
An environmental survey was conducted at the Detroit Canada Tunnel in Detroit, Michigan on August 18 to 20, 1979. Environmental measurements were made to determine employee exposures to carbon- monoxide (630080), lead (7439921), sulfuric-acid (7664939), total particulates, benzene (71432), and noise. Carboxyhemoglobin (COHb) tests were given to employees before and after work shifts. OSHA standards for total particulates were 15 milligrams per cubic meter (mg/m3), 0.1mg/m3 for lead, and 1mg/m3 for sulfuric-acid. For benzene, the OSHA limit was 10 parts per million (ppm) and for noise, 90 decibels on the A-weighted sound scale. All exposure limits were based on an 8 hour time weighted average. Sampling indicated no detectable concentrations of sulfuric-acid and very low concentrations of 0.02ppm benzene. Noise was well within the recommended limit. Total particulate was 0.08mg/m3 and lead was the 2 survey days; in survey smokers, COHb increased by 2 and 1.5 percent on the 2 days tested. Carbon-monoxide exceeded the 35ppm standard on one occasion, but the time weighted 8 hour average was always less than 35ppm. The authors conclude that even though carbon-monoxide exposures are not in excess of standards, the increased COHb employees dictates the rotation of inspectors to avoid potentially high exposures.
Keywords
NIOSH-Author; NIOSH-Technical-Assistance-Report; Hazards-Unconfirmed; Tunnel-workers; Air-quality-measurement; Air-sampling; Dust-exposure; Airborne-particles; TA-79-25; Region-5
CAS No.
630-08-0; 7439-92-1; 7664-93-9; 71-43-2
Publication Date
19800201
Document Type
Field Studies; Technical Assistance
Fiscal Year
1980
NTIS Accession No.
PB80-192065
NTIS Price
A02
Identifying No.
TA-79-25
NIOSH Division
DSHEFS
Source Name
National Institute for Occupational Safety and Health
State
MI; OH
Page last reviewed: November 20, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division