A flocculation/sedimentation combination basin in a conventional drinking water treatment plant is to be constructed of cast-in-place reinforced concrete. The horizontal flow rectangular basin will be located in New Jersey, USA. The client must decide whether or not to pay to have the basins covered with a concrete slab or,alternatively, left open. Discuss all the factors that the client should consider when deciding whether or not to cover the floc/sed basin. Discuss all the advantages, disadvantages and considerations that the client should think about. Be clear and complete so the client understands what the choices are and any ramifications of the decision.