Another option for meeting current EPA fuel vapor emissions requirements is fluorination of mono- layer HDPE fuel tanks. This secondary fluorination process (out-sourced to a third-party supplier) improves the barrier properties of the tank surface to meet current fuel vapor emissions standards. Fluoro-Seal International LLC (fluorination treatment supplier) has located a treatment facility just 25 miles from our manufacturing site. This close proximity to Fluoro-Seal means that our customers can minimize the added freight costs involved with this secondary process and assembly.