ADS Environmental Services FlowShark QR 775003 A2 - Manual (Page 110)

Communication 4-7
 Use urethane foam to seal the space between the conduit
and the corbel or manhole wall to prevent infiltration into
the manhole.
Running the cable and conduit from the manhole to the EMU location
7. Provide enough slack in the cable at the manhole end to allow
removal of the monitor from the manhole during service
activities.
Note:
Do not connect the communication cable to the
monitor at this time!
8. Provide approximately 40 (102 cm) inches of excess cabling at
the designated EMU location.
9. (applies only to applications requiring conduit) Use urethane
foam or a sealing fitting to form a seal between the
communication cable and conduit at each end of the conduit.
This will prevent sewer gases from entering the EMU
enclosure, moisture from entering the conduit during a
surcharge, and inflow from entering the manhole.