The Certificate of Quality is the final stage or validation of the fuel being produced for sale or distribution. The quality control manager of a fuel production site must be responsible for the development, maintenance and improvement processes and initiatives regarding the quality of output.
The manager may and probably should take samples from dispensers/fillers, as well as conducting a visual check of fuel samples. He must test the membrane filtration and measure the pressure on filter vessels. Renewable fuels from non-fossil sources have many advantages. For a start, they are more eco-friendly, producing fewer greenhouse gases.