All new parking lots or other new paved and drained areas where the
collected stormwater load would surpass that of the sewer system into
which it would discharge shall have a complete stormwater retention
system designed by an architect or engineer and approved by the Chief
Plumbing Inspector and the Sewer Authority, as part of their construction.
In all cases where a change in the potential peak amount of stormwater
collected from a paved and drained parking lot, other paved and drained
area, or drained collection area would create a new stormwater load
that would be larger than the load capacity of the storm drainage
system through which, or the sewer system into which, it discharges,
a complete stormwater retention system designed and drawn by an architect
or engineer and approved by the Chief Plumbing Inspector and the Sewer
Authority shall be installed.