Building wastewater mostly scattered countries of the concrete mixing process, wash water for equipment and equipment for construction and the process of excavating the land construction. The composition of wastewater mostly cement, sand, suspended solids ... This sewage if there is no control measures and proper handling will pollute surface water sources in the area. Therefore, the entire amount of sewage will be treated by temporary sedimentation pit preliminary before receiving source emissions. Thus, the degree of impact on water environment in the area will be negligible.
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