Accession Number:

ADA128537

Title:

Investigation of the Hazards Posed by Chemical Vapors Released in Marine Operations - Phase II.

Descriptive Note:

Final rept. May 79-Oct 83,

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX

Report Date:

1983-04-01

Pagination or Media Count:

471.0

Abstract:

The flammability and toxicity hazards associated with 1 chemical vapors emitted from tankers and barges during product loading, and 2 man entry into empty tanks was studied. Analytical models have been developed to descrive 1 the downwind concentration contours of heavier-than-air product vapors emitted during tank loading, and 2 the vapor concentrations in an empty tank during ventilation and evaporation of residual chemicals. The analytical models have been validated through an extensive series of field tests on tankers and barges in marine terminals. For the plume model validation, 103 independent tests covering numerous products, loading rates, vent geometries, tank geometries, and atmospheric conditions were conducted. Source concentrations at the tank vent and downwind concentrations on the deck at man breathing height were measured for each test for both model validation and hazard assessment. Validation of the tank ventilation models was accomplished through 26 independent gas freeing tests. Tank gas concentrations were measured for a range of tanker and barge tank configurations, chemical products, blower flowrates, and residual cargo conditions. A hazardous chemical vapor handbook for marine tank vessels has been developed including a users manual which will allow Coast Guard specialists to integrate the analytical models into the USCG HACS system. Personal exposure and biological monitoring was also accomplished to provide a direct indication of occupational exposure.

Subject Categories:

  • Toxicology
  • Physical Chemistry
  • Safety Engineering
  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE