Oil and Grease Measurements Frequent Questions US EPA

Withdrawal of Approved Methods Employing CFC-113Recommended Method For Testing Oil and Grease and Total Petroleum HydrocarbonsMethod 418.1Source For N-Hexane For Use with EPA Method 1664AUse of Repetitive Amounts of Silica Gel with EPA Method 1664AReports on Replacement of Freon with Hexane as The Extraction SolventDocumentsMethods that employ CFC-113 as the extraction solvent and that were approved for testing of oil and grease in water at 40 CFR Part 136 are EPA Method 413.1 and Standard Methods No. 5520B. EPA withdrew these methods in the final rule published March 12, 2007. The only method approved for testing oil and grease in wastewater is EPA Method 1664A. Meth...