Onsite Wastewater Systems Seminar If you want to learn more about alternative onsite wasterwater options, join the Virginia Onsite Wastewater Recycling Association (VOWRA) on October 6 – 8, 2004 at the Holiday Inn Select in Chantilly, VA. The VOWRA has put together a very comprehensive program that offers participants a variety of informational sessions to choose from, including an all day Wastewater Systems Basics A-Z and an NSF Test Review session. To sign up, use the registration form included with the flyer.