In the restricted procedure public tender negotiated for adaptation of the gas meters in service, class Gconditions, in line with the obligations as per resolution ARG/GAS 155/08, for a tender amount of around Euro 5.3 million, of the 30 points reserved for the technical component, 9 points were reserved for social sustainability (possession of OHSAS18001 certification, safety training, accident and injury rate) and 5 points were reserved for environmental sustainability (possession of ISO 14001 environment certification, and environmental impact of vehicles used).