Wastewater and sewage include bacteria, viruses, and parasites etc. Health effects include vomiting, headache, diarrhea, fever cramps amongst others
Building materials that are porous include plasterboard, timber, wood. Such materials can absorb sewage contamination into the material.
NLR have specialized methods of removing the contamination and testing to ensure these materials are safe. Materials like carpet and underlay need to be removed when there is sewage contamination. However other materials can be assessed and methods such as blasting, laser cleaning, antimicrobial cleaning etc can be used to recover these surfaces.