Within any area served by a separate sanitary sewer
system, no stormwater shall be allowed to enter soil, waste or vent
pipes from any building. Within any such area, no down spout or leader,
gutter or other pipe, drain or channel which may at any time carry
stormwater surface drainage derived from hydraulic pressure or from
well points, cooling water or seawater shall be connected with any
sanitary sewer. Every joint in the connection to a sanitary sewer
shall be made watertight so that no leakage into or from such connection
shall occur.