Part I is a supplement to the EMSL-Cincinnati publication "e;Methods for the Determination of Metals in Environmental Samples"e; and was prepared to revise and place in the Environmental Monitoring Management Council (EMMC) format certain spectrochemical methods used for metals. Part II, the EMSL-Cincinnati publication "e;Methods for the Determination of Inorganic Substances in Environmental Samples"e; was prepared as the continuation of an initiative to gather together a compendium of standardized laboratory analytical methods.