Petrol station operators in Germany need to consider several safety characteristics of ethanol and automotive petrol mixtures as demand for renewable energy sources increases. Some of the safety characteristics that petrol station operators need to consider include upper explosion point (UEP) of the mixtures and maximum experimental safe gap (MESG) and auto ignition temperature (AIT). Some of the other safety characteristics that need to be considered while handling ethanol and automotive petrol mixtures include lower explosion limit (LEL), upper explosion limit (UEL), and initial boiling point. All storage tanks need to be fitted with flame arresters when the ethanol amount exceeds 60 volume% and storage tanks for automotive petrol and ethanol are ventilated at petrol stations. The tanks also need to be equipped with flame arresters of type IIA to transport ethanol and petrol mixtures having ethanol amounts up to 85 volume%.