StwoK+5

=StwoK= Sewage - Sewage is the mainly liquid waste containing some solids produced by humans which typically consists of washing water, faeces, urine, laundry waste and other material which goes down drains and toilets from households and industry. Percolates - To cause (liquid, for example) to pass through a porous substance or small holes; filter. Assimilate - To absorb into a system. Purification - The process of rendering something pure, i.e. clean of foreign elements and/or pollution, and may refer to: Contamination - The process of contaminating. Hazardous - Put simply, a waste that poses substantial or potential threats to public health or the environment. Excavations - Excavation is the best-known and still the most commonly used technique ithin the science of archaeology. In this sense it is the exposure, processing and recording of archaeological remains. Calcium Carbonate - A chemical compound, with the chemical formula CaCO3. It is a common substance found as rock in all parts of the world. Next