Wastewater does contain bacteria and other microorganisms. These may have biodegraded the components of Aroclor 1260 and compound with retention time of 10.0 and 11.8 might have been the products. The compounds presented have retention times which are different from those shown in Figure 2 (the standard). Chlorobenzoates have been reported to have retention times ranging from 7.6 to 14.5.
Figure 3: HPLC Chromatogram obtained after an experiment to analyse PCB degradation in unsterilized wastewater (Control 1).