Safe work in sewer, gas wells and collectors

Work of the person in underground constructions, water, sewer and gas wells, and also collectors is dangerous in essence because of accumulation there combustible and toxic gases, or a shortcoming oxygen. In comparison with other accidents of poisoning by sewer gases meet infrequently. However, at non-compliance with requirements of labor protection, often these cases come to an end with a lethal outcome, and, as a rule, several people...