N.J. Admin. Code § 19:6-2.63
The soil material directly underlying all footings, foundation piers, and foundation walls shall be inspected by an architect or engineer after excavation and immediately prior to construction of the footings. If such inspection indicates that the soils conditions do not conform to those assumed for purposes of design as described on the plans, or are unsatisfactory due to disturbance, then additional excavation, reduction in allowable bearing pressure, or other remedial measures shall be adopted, as required. A copy of a report or reports on such inspection or inspections describing the conditions found and any necessary modification of the design, and bearing the signature of the architect or engineer making the inspections, shall be filed with the chief engineer. In addition, notification shall be received by the chief engineer at least two working days prior to construction of the footing, pier, or foundation walls, that the subgrade is ready for inspection, if desired, and the subgrade shall be kept open for inspection by the chief engineer until the date and time specified in the notice.
N.J. Admin. Code § 19:6-2.63