An amendment to Chapter 1066 of the county's codified ordinances addresses the structural soundness and water tightness of tanks used for on-site sewage systems.
To further address soundness and water tightness, the Health Department will observe either a water test or a vacuum test at the time of the construction inspection.
In locating the tanks on site, they shall not be placed in low areas or swales subject to drainage, channeling of rainfall, or ponding of water. Tanks shall be protected with controlled backfill when shrink-swell soil is present. If water table indications are observed or measured above penetrations or lank seams, a water table reduction system must be installed to lower the water table below the seam or penetration.
The Loudoun County Health Department has developed the Loudoun On-Site Wastewater Tank Structural Requirements (PDF) to provide more detail to manufacturers. View a list of accepted tanks (PDF).
Additional information can be obtained by contacting the Health Department at 703-777-0234 or by emailing our office.