Bidding 226688. Conducting An Open Request For Proposals In Order To Select Service Providers For Obtaining A Sez Of The Territorial Administration Of Rospotrebnadzor For The Placement Of Prto (P1), Organizing And Conducting Measurements Of Emf Levels From The Antennas Of The Res And Obtaining Positive Sez (Ez2) For The Placement And Operation Of The Res In The Office Of Rospotrebnadzor For Facilities Located In St. Petersburg And The Leningrad Region In 2026-28 Gg.