This European Standard specifies a method for determining contamination as the content of undissolved substances in middle distillates containing up to 5 % (V/V) fatty acid methyl esters (FAME) and in 100 % (V/V) FAME. This method can be applied for contaminant content from 6 mg/kg to 30 mg/kg. NOTE 1 Excessive contamination in a fuel system can give rise to premature blocking of filters and / or hardware failure, and is therefore undesirable. This standard applies to liquid petroleum products having a kinematic viscosity not exceeding 8 mm 2 /s at 20 °C, or 5 mm 2 /s at 40 °C, e. g. diesel fuel as specified in EN 590[1] or light fuel oils. Although the test method precision has not been defined, the method described may also be used for blends containing more than 5% (V/V) FAME and for petroleum products having a viscosity exceeding the above. NOTE 2 For the purposes of this European Standard, the term "% (V/V)" is used to represent the volume fraction. WARNING - Use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.