a porous membrane assembly includes , in an exemplary embodiment , a porous membrane substrate having hydrophobic properties . the membrane substrate includes a first side , an opposing second side and a plurality of pores extending therethrough . the membrane substrate also includes a discontinuous layer of an oleophobic coating applied to the first side so that the plurality of pores in the first side are substantially free of the oleophobic coating , and a continuous layer of an amine containing hydrophilic polymer coating applied to the second side of the membrane substrate .