Abstract
We present estimates of the downwind inhalation health hazard to humans arising from large-scale releases of pressurised liquefied chlorine based on data from the Jack Rabbit II chlorine dispersion field campaign. For chlorine releases in the range of 7 to 9 metric tons, lethal, severe, and mild health effects are expected up to 1 km, between 2 and 5 km, and more than 11 km downwind from the release, respectively. The AEGL-3, AEGL-2, and AEGL-1 acute inhalation hazard thresholds are expected to be exceeded between 2 and 5 km, up to 11 km, and beyond 11 km downwind from the release, respectively. Since these hazard distance estimates are based on chlorine concentrations that were directly measured (i.e., not modelled), their accuracy depends only on the quality of the health effects models, and not on the quality of any atmospheric transport and dispersion model or container release (chemical source term) model.
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