PolyOne closing 3 more plants- PVC compounding plants in Burlington and Farmingdale, NJ, and a polyethylene compounding plant in Valleyfield, Quebec, will close by the end of 2002, eliminating about 300 jobs. PVC compounding also will be stopped in St. Remi de Napierville, Quebec, although powder compound and plasticizer production will continue at that site. PolyOne’s engineering films business in Burlington will not be affected by the closing of the PVC compounding plant there. Laboratory operation at Burlington and Farmingdale also will close. PolyOne expects about 25 lab employees to transfer to Avon Lake, where the company will expand its existing lab facilities.