External geological control and certification (CC) during the remediation and capping works at the Söles landfill in Glorenza, in accordance with the Quality Certification Plan (PCQ) required by Art. 4, Par. h) of DPP no. 17/2009 "Amendments to the technical regulations for waste landfills". Supervision of compliance with the PCQ, evaluation of materials and certifications, performance of acceptance tests on site and in the laboratory in contradictory manner, deliberation of the individual components of the waterproofing system.