On lots of three (3) acres or greater, prior to adjustment for the capping fill, all undisturbed soils exhibiting a depth of twelve inches (12”) or greater to a brief seasonal water table, and/or a depth of sixteen inches (16”) or greater to an adjusted moderate seasonal water table, and/or a depth of twenty inches (20”) or greater to an adjusted long seasonal water table, shall utilize standard onsite wastewater systems as outlined in this part.