This handbook of Level 2 procedures presents the results of a laboratory evaluation of specific detailed method for analysis of organic chemicals in particular compound categories. The report supplements the earlier Level 2 procedures Manual and provides an initial experimental data base as a resource for laboratories undertaking Level 2 studies. The Level 2 methods were designed to provide more detailed ad more accurate data concerning specific compounds whose presence in the sample could be inferred on the basis of the categorical analysis of Level 1.