On July 1, 2009, the Virginia Department of Health will begin regulating the operation and maintenance of alternative onsite sewage systems. Certain requirements, such as requiring owners of newly installed alternative systems to record notices in the land records and for owners to operate their alternative systems according to manufacturers' instructions, go into effect on July 1. Other requirements regarding alternative systems are under development and will be phased in as interim requirements, emergency regulations and final regulations go into effect.
Here is the specific link to the operation and maintenance manuals (e.g. "manufacturers' instructions"):
Protection from foodborne illness, waterborne diseases, and animal diseases