PAH concentrations in feed soils (black bars), slurry from the monthly-fed bioreactor (grey bars) and slurry from weekly-fed bioreactor (white bars). Values for feed soil are from samples at days 0 and 56, and values for the slurries are from samples at days 28, 56, and 84. Measurements are pooled averages and standard deviations of triplicate soil aliquots at each time point. NAP Naphthalene, ACE acenaphthene, FLU fluorene, PHN phenanthrene, ANT anthracene, FLA fluoranthene, PYR pyrene, BaA benz[a]anthracene, CHR chrysene, BbF benzo[b]fluoranthene, BkF benzo[k]fluoranthene, BaP benzo[a]pyrene, DBA dibenz[a,h]anthracene, BgP benzo[g,h,i] perylene