Engineering service for the drafting of six projects for the following actions: - Membrane verification unit for a membrane cleaning system and for the osmosis membrane cleaning system of the ITAM Tordera (LI-00147). - Improvement of accessibility and maneuverability for maintenance to the closed filters of the 1st and 2nd stage of ITAM TORDERA (LI-00389). - Repair of the distribution chamber of the decanters to the mixing chamber of the ETAP Ter (LI-00275). - Renovation of shutters in the South Network (LI-00370). - Adaptation of existing overhead cranes and study, design and calculation of new ones at ITAM Llobregat and the Taigua pumping station in Abrera (LI-00395). - Installation of a trihalomethane removal system in the ATL Network tanks (LI-00367). These actions are distributed across the ATL distribution network and the drafting of these projects requires technicians in various specialties, such as: - Civil works, hydraulic regulation elements and instrumentation equipment. - Automation and telecontrol installations. - Electrical installations, such as electrical services with a company. - Service or auxiliary installations, such as overhead cranes or reagent tanks. These independent construction projects to be presented must define and value: - An alternatives study - The materials, equipment and means necessary to execute the chosen solution. - The estimated planning of the works. - The prior permits and administrative authorizations before the start of the works. The projects will be drafted in accordance with the instructions of the "IPO-002 General technical bases for the drafting of ATL projects" for project drafting, as well as those established in the specific technical specifications (PPTP) of the projects, always adhering to the most restrictive criterion.