RCRA Hazardous Waste Regulations, Hazardous Waste Determination
SW-846 Test Method 9095B: Paint Filter Liquids Test
The document available at https://www.epa.gov/sites/production/files/2015-12/documents/9095b_0.pdf contains information on the method used to detect the presence of free liquids in a representative sample of waste to determine compliance with Title 40 of the Code of Federal Regulations, Sections 264.314 and 265.314. This method is an SW-846 Method-Defined Parameter (MDP), meaning that it may not be modified when used for Resource Conservation and Recovery Act (RCRA) testing. For more information, see the Methods Innovation Rule page.
The US EPA approved test method (EPA 9095B), referred to as "the paint filter test", is used to determine the presence of free liquids in a representative sample of waste.  It is referenced in the regulations pertaining to hazardous waste landfills (40 CFR 264.314 & 40 CFR 265.314) A 100 mL or 100 g sample of the material to be disposed in the landfill is placed in a a standard conical  [60 +/- 5% (fine meshed size) paint filter.  If any portion of the sample passes through and drops from the filter within a five (5) minute period, the material is deemed to contain free liquids, and material is deemed to contain free liquids for purposes of 40 CFR 264.314 and 265.314.
