EPA published a decision in 2013 on the use of an alternative laboratory analytical method for oil and grease. (See CWA Methods Regulatory History.)
- NPDES Chemistry Limited Use Alternate Test Procedure Application (docx; fillable form)(2 pp, 35 K, March 2013)
- NPDES Chemistry Limited Use Alternate Test Procedure Method Documentation Form (docx; fillable form)(4 pp, 60 K, March 2013)
- Performance Comparison Form (Clean Matrix, Laboratory Pure Water) (docx; fillable form)(6 pp, 56 K, March 2013)
- Performance Comparison Form - Effluent Matrix (docx; fillable form)(5 pp, 51 K, March 2013)
- Oil and Grease ATP Comparison Worksheet (spreadsheet)(36 K, February 2013)
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Clean Water Act Analytical Methods Update Rule - Decision on Alternative Oil and Grease Method; Fact Sheet (PDF)(2 pp, 43 K,
March 2013)
Decision on use of ASTM Method D7575
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Guidance for Limited Use Alternate Test Procedure Applications for ASTM Method D7575 for Oil and Grease (PDF)(22 pp, 127 K,
March 2013,
821-R-13-006)
Instructions for demonstrating comparability between EPA-approved methods for measurement of oil and grease in wastewater and ASTM D7575, an alternate method