1. Method 5021, Rev. 0;EPA SW‐846,1986
2. Method 5030;EPA SW‐846,1986
3. Flores , P. and
Bellar , T. 1992. Determination of volatile organic compounds in soils using equilibrium headspace analysis and capillary column gas chromatography/mass spectrometry, 1–59. Cincinnati, OH: U.S. EPA, Office of Research and Development, Environmental Monitoring Systems Laboratory. EPA/600/R‐93/030