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This document specifies the long-term sampling of PCDDs/PCDFs/PCBs. There are three different sampling methods, which are based on the three different principles described in EN 1948-1, but partially modified for long-term sampling requirements:

— filter/condenser method;

— dilution method;

— cooled probe method.

Each sampling method is illustrated in detail in Annex D. The sampling methods described in this document are designed for a sampling duration of typically up to four weeks.

Additionally, this document specifies a framework of quality control requirements for any long-term sampling method.

With the methods described, experiences were gained for a concentration range up to 4,0 ng TEQ/m3 at various stationary sources (e.g. waste incinerators, sinter plants, cement kilns).

For complete implementation of the measurement method, the use of EN 1948-2 and EN 1948-3 describing extraction, clean-up, identification, and quantification, respectively, is necessary in order to determine PCDDs/PCDFs. Additionally, EN 1948-4 is necessary for PCBs.