Sustainability Matrix/Off gas CH4 leakage

the CH4 leakage are relavant to CO2eq total emissions. So CH4 leakage in off gas must be considered when producing biomethane. RED2 Directive only consider the combustion of the off gas, not providing data for low emission upgrading systems. Some national regulations, on the opposite, provide emission values for the off gas coming from low emission systems. Using RED2 data every CH4 emission level without combustion is simply considered as "no combustion". So it is possibile to choose one of the provided solutions.