Accession Number:

ADA277988

Title:

Sampling of Breathable Air in U.S. Navy Sonar Domes

Descriptive Note:

Technical rept. 1991-1992,

Corporate Author:

NAVAL MEDICAL RESEARCH INST BETHESDA MD

Report Date:

1994-03-01

Pagination or Media Count:

28.0

Abstract:

The Naval Medical Research Institute NMRI was tasked in 1990 to conduct air sampling to obtain baseline air composition in U.S. Navy sonar domes. This data would be used to assess potential long-term effects on personnel who routinely conduct dome entries. To date, samples have been obtained from 6 ships that were subsequently analyzed for volatile hydrocarbons and fixed gases O2 CO2, and CO by gas chromatography coupled with either thermal conductivity, flame ionization, or mass spectrometry. Only 5 hydrocarbon species methane, butane, toluene, xylenes, and methyl chloroform were found at levels 1 part per million ppm in the 6 domes following a 24-hour period of non-ventilation. The levels of individual chemicals were well below their threshold limit values for hazardous exposure. These contaminants were reduced by up to 90 following 4 hours of ventilation at the flow rate normally used for dome entries. No hydrocarbons 0.1 ppm, other than methane, were found in any ships low pressure air supply used for dome ventilation. Air purity, Chemical contaminants, Diving atmospheres, Hyperbaric toxicology, Gas analysis, Gas chromatography, Mass spectrometry.

Subject Categories:

  • Personnel Management and Labor Relations
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE