Reading the township's geology description
Deptford's 2006 stormwater plan identifies the Woodbury and Marshalltown formations as confining units, along with Navesink and Hornerstown. It also locates Englishtown and Wenonah-Mount Laurel aquifer outcrops within the township. Those descriptions concern the ground across an area, not the condition of an individual foundation.
For a leaking wall, we trace the wet marks and inspect the surface drainage outside that part of the house. A visible crack calls for a separate look at the wall's condition. We explain what supports a drainage recommendation and what needs a foundation repair assessment.