When major control facilities, such as retention basins, requiring
a PADEP permit, are planned, soil structures and characteristics shall
be investigated. Plans and data prepared by a licensed professional
engineer or geologist with experience and education in soil mechanics
shall be submitted. These submissions should consider and offer design
solutions for frost heave potential, shrink/swell potential, soil
bearing strength, water infiltration, soil settling characteristics,
fill and backfilling procedures and soil treatment techniques as required
to protect the improvements or structures.