Many studies have shown that the public typically spend around
90% or more of their time indoors (Harrison et al., 2009). Despite this,
air quality standards in the UK currently apply to outdoor air. There is
consequently a case for developing guidelines for the quality of indoor
air. To do so requires sound knowledge of the pollutants present and
the health risks which they pose. However, currently there is very
limited information, especially for the United Kingdom on the
concentrations and profile (i.e. relative abundance ratios of individual
PAH compounds, relative to BaP) of PAH compounds indoors