Summary and recommendation

The different methods for determining Kd/KOC are compared in Table 6. Further details and references are given in Appendix C.

The preferred method for Kd/KOC determination is the current gold standard, the OECD guideline 106 (OECD, 2000b). This recommendation concurs with the current EMA recommendation found in the EMA Questions and answers document (EMA, 2010). Determinations should be made with the appropriate matrix for the corresponding trigger (sludge KOC for terrestrial; soil KOC for groundwater/ water). Reading across matrices using KOC should be avoided in determining whether a particular trigger has been exceeded.