Reliable on- and/or off-line monitoring is essential for ensuring good performance of any effluent treatment plant; specific analysis are conducted either within the existing tannery process and quality control laboratory or (in the case of larger plants and certainly Common Efflent Treatment Plants, CETPs) in speicialized laboratories.

This manual (originally prepared in French and tranlated into English, Chinese and Spanish) provides a rather detailed overview of analysis, methods and equipment needed to conduct the main (C)ETP peformance tests. Suggestions about the type and frequencies of analysis are also given. Given the fact that the manual was prepared in 1994 it is highly recommendable to get acquainted with changes in procedures and equipment that took place since then.