Add to ORKGTheoretical part of this bachelor thesis explains the terms concerning waste management in a power supply company. It further descibes the practice enforced in accordance with current law and resolves the origin, collection and disposal of waste. The practical part contains specific activities of a power supply company in cleaning a gas pipeline with resulting hazardous waste. It also specifies various types of waste, its quantity, classification in the catalogue of wastes and a detailed description of the technologies used and actions taken on waste disposal.This thesis aims to qualify the types of waste produced in a power supply company and to evaluate the procedures for waste storage and disposal according to current law