1. EnNovative Technologies. Soil Collection, http://www.ennovativetech.com/collection.htm (accessed April 1999).
2. Environmental Protection Agency, 1996a. Method 5035: Closed-System Purge-and-Trap and Extraction for Volatile Organics in Soil and Waste Samples. Test Methods for Evaluating Solid Waste — Physical/Chemical Methods EPA/SW-846, 3rd ed., Revision 0, December.
3. Environmental Protection Agency, 1996b. Method 5015B: Nonhalogenated Organics using CD/FID. Test Methods for Evaluating Solid Waste — Physical/Chemical Methods EPA/SW-846, 3rd ed., Revision 2.
4. Environmental Protection Agency, 1996c. Method 5021B: Aromatic and Halogenated Volatiles by Gas Chromatography Using Photoionization and/or Electrolytic Conductivity Detectors. Test Methods for Evaluating Solid Waste — Physical/Chemical Methods EPA/SW-846, 3rd ed., Revision 2.
5. Environmental Protection Agency, 1996d. Method 8260: Volatile Organic Compounds by Gas Chromatography/Mass Spectrometry (GC/MS). Test Methods for Evaluating Solid Waste — Physical/Chemical Methods EPA/SW-846, 3rd ed., Revision 2, December.