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Abstract
As part of an environmental impact assessment for building a new town in Junk Bay, sulfur dioxide (SO2) concentrations were measured from 18 May to 9 June 1981 at three locations in Junk Bay. Hourly averaged samples were collected with an automatic sequential air sampler over the hours from 1100 to 2300 and analyzed with flame photometric detection technique for sulfur dioxide. It is found that mean SO2 concentrations at the three sites range from 18.6 μg.m−3 (7 ppb) to 45.0 μg.m−3 (17 ppb). Maximum hourly averaged value is 126 μg.m−3 (48 ppb). The SO2 level is approximately inverse proportional to the square root of wind speed. Analysis of the polar isopleth diagram suggests that the recorded high SO2 concentrations were likely due to emissions from a nearby ship‐breaking factory equipped with iron reheating furnaces. Concentrations of SO2 usually increased during the day and were highest in the evening.