Decision on Use of ASTM Method D7575
The EPA published a decision in 2013 on the use of an alternative laboratory analytical method for oil and grease. (Refer to CWA Methods Regulatory History.)
- NPDES Chemistry Limited Use Alternate Test Procedure Application (fillable form) (docx)
- NPDES Chemistry Limited Use Alternate Test Procedure Method Documentation Form (fillable form) (docx)
- Performance Comparison Form (Clean Matrix, Laboratory Pure Water) (fillable form) (docx)
- Performance Comparison Form - Effluent Matrix (fillable form) (docx)
- Oil and Grease ATP Comparison Worksheet (spreadsheet) (xlsx)