A system and method for treatment of a contaminated liquid is described. Such collective properties are distinct from type-member properties of the collection that follow from the types and type qualifiers of its members. Next, a patterned circuit layer is formed on each of the surfaces by using the via as an alignment target. redatuming the combination of a first causal part of the first new redatuming dataset and an anti-causal second part of the second redatuming dataset to go from the target horizon back to the surface using hyperbolic one-way traveltime operators to provide a dataset that is referenced to the surface without an imprint of the anomaly. The workstation is arranged in such a manner as to enable a seated user to place the legs beneath the structure, at least when the window is horizontal.