2008 Progress Report - Bassetlaw District Council

2.5 Progress on Sulphur Dioxide EmissionsNational Air Quality Objectives350 µg/m 3 not to be exceeded more than 24 times a yearmeasured as a 1-hour mean125 µg/m 3 not to be exceeded more than 3 times a yearmeasured as a 24-hour mean266 µg/m 3 not to be exceeded more than 35 times a yearmeasured as a 15-minute meanBassetlaw District Council no longer carries out direct monitoring for sulphur dioxidewithin the district. Previous assessments and progress reports have identified that thebackground levels within the district are low. The maximum estimated backgroundconcentration for 2001 was 15.1 µg/m 3 , with an average of 5.1 µg/m 3 .Historically, the most significant industrial sources of sulphur dioxide within Bassetlawhave been the coal powered power stations alongside the River Trent. Howeveremissions from these sources has been significantly reduced following the installation offlue gas desulphurisation (FGD) plant at the two remaining stations.No new industrial sources that are likely to emit significant amounts of sulphur dioxidehave been developed or proposed in the Bassetlaw District since the previous updatingand screening assessment.Based on a review of all available information it is considered highly unlikely that the airquality objective for sulphur dioxide will be exceeded.Page 12 of 22