— fourthly, enterprises that have a technology of possible separation of surface drains (these are enterprises of the first group in the classification of the Research Institute of Vodgeo), it is proposed to consider the possibility of mounting the technological scheme of the local treatment structure intended for stormwater using flowing regimes or persuade their choice towards accumulation wastewater in accumulating containers. This will make it possible for the production of subsequent cleaning of the drain directly on the treatment plant in complete factory readiness, which are made of fiberglass.