Saudi Basic Industries (SABIC) & ExxonMobil (XOM) are building a grass roots ethylene cracker on the South Texas Gulf Coast, which will undoubtably process some of the surfeit of NGL's the fracking boom has brought to market. I think I know the brownfield spot this will likely be built at : a now defunct former Fina crude oil terminal and dock facility.
http://news.exxonmobil.com/press-release...project-us-gulf
http://news.exxonmobil.com/press-release...project-us-gulf