Standard Industrial Classification Manual, 1987, Office of Management and Budget.

Standard Methods for the Examination of Water and Wastewater, 18th, 19th, 20th and 21st Editions, 1992, 1995, 1998 and 2005, American Public Health Association.

Method 8015B, Nonhalogenated Organics Using GC/FID, Revision 2, December 1996, U.S. Government Printing Office.

Method 8015C, Nonhalogenated Organics Using GC/FID, Revision 3, November 2000, U.S. Government Printing Office.

Method 8015C, Nonhalogenated Organics Using GC/FID, Revision 3, February 2007, U.S. Government Printing Office.

Method 8015D, Nonhalogenated Organics Using GC/FID, Revision 4, June 2003, U.S. Government Printing Office.