NewsNet5.comShell to build petrochemical plant in PennsylvaniaWashington PostShell Oil has tentatively chosen to put a new multi-billion dollar petrochemical plant in Pennsylvania to take advantage of an abundance of natural gas from the Marcellus shale. Both Ohio and West Virginia had tried hard to woo the company.Pittsburgh-area site is chosen for major refineryDailyFinanceShell Oil: Site Near Pittsburgh Chosen For Petrochemical Refinery -APFox BusinessAPNewsBreak: Pa.