U.S. EPA Methods
The EPA method can be downloaded here.
ASTM (American Society of Testing and Materials) Methods
Standard Practice for Closed Vessel Microwave Solvent Extraction of Organic Compounds from Solid Matrices
Standard Practice for Solvent Extraction of Total Petroleum Hydrocarbons from Soils and Sediments Using Closed Vessel Microwave Heating
The ASTM methods can be downloaded for a fee at www.astm.org
Standard Operating Procedure for Determination of Phthalates
CPSC methods can be downloaded here.