ENSR (1992). Sun Company, Inc (R_M), Philadelphia Refinery, Philadelphia, PA, Results of a RCRA Facility Investi Posted February 20, 2019 by dev & filed under . ENSR (1992). Sun Company, Inc (R_M), Philadelphia Refinery, Philadelphia, PA, Results of a RCRA Facility Investi Leave a Reply Click here to cancel reply. You must be logged in to post a comment.