Oil and Grease

Method 1664, Revision A: N-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated N-Hexane Extractable Material (SGT-HEM; Non-polar Material) By Extraction and Gravimetry

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• Fact sheet (February 1999) about the test method.
• Test method published in the Federal Register (May 14, 1999)
• Method 1664, Revision A | Print Version (PDF) (28 pp, 213K)
• Guidance on implementation and use (PDF) (44 pp, 238K)
• Questions and Answers
• Modifications to Method 1664A

  Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Proposal

• Proposed method published in the Federal Register (January 23, 1996)
• Errata Sheet