Westlake Chemical Corp is converting the feedstock for its Calvert City, Kentucky ethylene plant from propane to ethane along with increasing ethylene capacity from 450 mln lbs per year to 630 mln lbs per year. This expansion and feedstock conversion will enhance Westlake's vinyl chain integration and leverage low cost ethane being developed in the Marcellus shale area. Westlake also plans to expand its the existing PVC plant in Calvert City by about 200 mln lbs per year at its existing 1,100 mln lbs of annual capacity. This expansion allows Westlake to take advantage of the increased ethylene production at the site and to provide additional PVC resin to meet the growing demands of global customers. The construction costs for these projects are estimated to range between US$210-240 mln. The ethylene expansion and feedstock conversion project is targeted for start-up in Q2-2014 and the PVC expansion is projected to start up in late 2014.