The occurence of TCS and other organic
contaminants has been reported in Canadian municipal
sewage sludge and biosolids samples (Lee and Peart, 2002;
Chu and Metcalfe, 2007; Mackay and Barnthouse, 2010;
Table 1). Thus the two main sources of TCS release into the
environment are: (1) discharge of WWTP effluent into receiving
waters; and (2) land application of biosolids containing
residues of the antimicrobial.