4. Inspecting and Testing Collection Systems Objectives

Following completion of this chapter, students should be able to:

  1. Inspect and test existing sewers for operation and maintenance problems and new and replacement sewers for proper installation. Examine line and grade, joint and junction adequacy, and proper installation of manholes and appurtenances. Use inspecting and testing tools and dye testing.
  2. Determine the severity of problems in joints, taps, sewers, and manholes of existing facilities; illegal, unauthorized, or improper connections; and inflow, infiltration, exfiltration, and diversion flows. Determine damage due to corrosion, cracking, crushing, subsidence (soil settling), root intrusion, stoppages, washouts, and improper connections.

  3. Provide reports to supervisors so they can assign priorities to develop cost-effective maintenance or corrective action programs.

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