This desk study was financed by the EUROPEAN COMMISSION, Joint Research Centre, Ispra. It gives an overview of the occurrence of these organic compounds in sewage sludge, basic toxicological data, a review on persistence of organic contaminants in soils and risk assessments for the various pathways. The attempt was made to identifiy additional substances or substance groups which might cause hazards and should be regulated. Thus it is recommendended that the benzo(a)pyrene concentration in soil is regulated. To do the review a literature search was run in January 2001 and experts were asked for literature or references, members of ISO.
