Oil-based drilling fluid is prepared for further processing to recover the drilling fluid by pumping the drilling fluid through a flow meter. A first portion of the graphical program may be disabled, which may include preventing the first portion of the graphical program from being compiled andor preventing the first portion of the graphical program from being executed. The step refers to a routing rule of a design rule corresponding to a connection between the first interconnection pattern and the second interconnection pattern, when the first interconnection pattern and the second interconnection pattern would be routed in a same layer and connected each other. The opening between the chambers permits the surface water to flow into and through the lamella separator.