EPA Region 9 has developed technical guidelines to help ensure that sampling and analyzing for Volatile Organic Compounds (VOCs) in soil and solid matrices are conducted in a manner that achieves accurate, technically defensible data. Region 9’s guidelines, which are intended to apply whenever VOC sampling in and analysis of soil and solid matrices are conducted, are consistent with United States Environmental Protection Agency (USEPA) Office of Solid Waste test methods. These are included as part of a compendium of over 200 documents in “Test Methods for Evaluating Solid Wastes and Physical/Chemical Methods, SW-846” (hereafter “SW-846”), which.