Individual systems with surface water discharge may be considered for approval for a permit pursuant to section nine of this article under the following conditions:
When installing a standard sewage disposal system, modified system, experimental system or other approved system, the reserve area shall consist of an area for the placement of the original system together with an area for replacement and upgrade of absorption field lines within the reserve area. Testing of the site for approval shall consist of a six foot hole and a percolation test of the soils.
W. Va. Code § 16-1-9b