Table 5.

Sludge concentrations and changes of selected organic compounds between 1990 and 2012 in Germany.

Compounds	1990a	1996a	2001a	2012b	Change between 1990 (=100%) and 2012	Change between 2001 (=100%) and 2012
PCDD/F (ng/kg DM)	62	25	14	5.4	−91.3	−61.4
PCB (mg/kg DM)	2	0.2	0.09	0.05	−97.5	−44.4
AOX (mg/kg DM)	360	201	172	167	−53.6	−2.9

References:

^aAdapted from (Bergs, 2015).

^b(Wiechmann et al., 2013).