1. 1. “Methods for Chemical Analysis of Water and Wastes”, 1986, US EPA, Washington, D.C.
2. 2. “Test Methods for Evaluating Solid Wastes”, Revision 2, 3rd ed., 1992, US EPA, Washington, D.C., SW-846.
3. 3. “Interlaboratory Study of Three Methods for Analysing Petroleum Hydrocarbons in Soils”, 1994, API Publication No. 4599, API, Washington, D.C.
4. 4. “Methods for Determination of Petroleum Hydrocarbons in Soil”, Revision 1, 1992, API, Washington, D.C.
5. 5. “Methods for Determination of Gasoline Range Organics”, Revision 5, 1992, API, Washington, D.C.