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Phased Assessment Strategy for Sewers


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Do you want to understand your sewer system condition quicker with fewer resources?

Envirosight is excited to share a white paper about a new sewer assessment workflow called Phased Assessment Strategy for Sewers, or PASS.

Adopting PASS helps you prioritize which lines need the most attention, and allows you to update your assessments more regularly.

If you’re faced with deteriorating infrastructure and dwindling budgets, download this white paper now to learn more about the PASS workflow.

Published in: Government & Nonprofit
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Phased Assessment Strategy for Sewers

  1. 1. Phased Assessment Strategy for Sewers (PASS) A Plan for Understanding Sewer Condition Quicker, With Fewer Resources
  2. 2. Are deteriorating infrastructure and dwindling budgets forcing you to reevaluate your sewer inspection program? If so, it can be hard to know where to start, especially with limited bandwidth and resources. Here you’ll learn about a new workflow; one that will save your department money, help optimize resource utilization, and allow your inspection crews to focus their attention on the sewer assets that need it most. Introduction
  3. 3. Expectations/Responsibilities Municipalities are required to: •Maintain an up-to-date understanding of collection system condition. •Meet environmental regulations. •Prevent infrastructure failures (SSOs, residential backups, wet weather discharges, costly and unpleasant emergency backups). •Prioritize maintenance activities. •Reduce maintenance costs •Reduce environmental impact All with fewer and fewer resources
  4. 4. For decades we’ve used costly, time consuming CCTV as our sole tool for understanding pipe condition. We can no longer afford to “do it the way we’ve always done it”. This presentation outlines a game plan- to use our diminishing resources more effectively, using technology, resulting in greater productivity and better results. Inspecting/Cleaning Smarter Read the complete paper at
  5. 5. Step 1: Technology Zoom Camera Zoom survey cameras employ a video camera mounted on a telescopic pole to view deep within pipes from an adjacent manhole, as well as inspect the manhole itself. The technology uses high-powered optics and focused illumination Zoom cameras don’t replace conventional CCTV inspection, but rather identify exactly which pipes need further investigation. Sewer lines don’t need to be cleaned before a zoom survey, and therefore can be assessed quickly by a single operator. Read the complete paper at
  6. 6. Step 1: Technology Zoom Camera During Phase 1, you survey all your sewer pipes with a zoom camera. When defects are observed or the view is obstructed in a particular pipe, flag it for the next inspection phase. • Determines next step for a section of pipe o In good condition o Needs cleaning o Needs further inspection o Needs rehab • Helps determine proper tooling for cleaning and ensures efficient use of resources Read the complete paper at
  7. 7. Phase 1: Workflow Read the complete paper at
  8. 8. Step 2: Technology HD Video Nozzle Cleaning is an important part of pipe maintenance, and an essential prerequisite for CCTV inspection. Any line that doesn’t pass Phase 1 needs to be cleaned to remove the grease and debris that interfere with a CCTV crawler. In many cases these obstructions are the only problem with the pipe, and a quick post-cleaning video nozzle assessment can confirm that no additional crawler CCTV is needed. A video nozzle is a water-propelled HD camera that threads on the jetter hose, allowing rapid collection of detailed visual information about a pipe’s condition post- cleaning. Read the complete paper at
  9. 9. Step 2: Technology HD Video Nozzle On average, only 65% of pipes surveyed with a zoom camera will require additional attention, which starts with cleaning. Once the cleaning crew finishes cleaning the line they can quickly assess if any defects are present in the sewer lines and make a recommendation as to whether the pipe segment should be thoroughly inspected using a CCTV Crawler, or marked as PASS. Read the complete paper at
  10. 10. Read the complete paper at
  11. 11. Phase 2: Workflow Read the complete paper at
  12. 12. Step 3: Technology CCTV Inspection Crawler For lines where a Phase 2 video nozzle inspection reveals pipe defects, a final CCTV camera crawler inspection is warranted. Crawler inspections reveal the highest level of detail. CCTV inspections are essential for identifying and characterizing breaks, root intrusions, leaking water, and other kinds of deterioration. No inspection program can operate without a CCTV Crawler because of its unique ability to fully understand the problems inside a sewer pipe. Read the complete paper at
  13. 13. Step 3: Workflow Read the complete paper at
  14. 14. Benefits To understand the benefits of this workflow, look at the productivity and cost advantages of a phased approach compared to comprehensive CCTV inspection. Read the complete paper at
  15. 15. Productivity Benefits Read the complete paper at
  16. 16. Cost Benefits Read the complete paper at
  17. 17. PASS in Review PASS consists of a three assessment phases: • Zoom camera survey for 100% of pipes. • Video nozzle for 65% of pipes that need it. • CCTV crawler inspection for 25% of pipes that need it. By implementing PASS, you can: • Boost productivity 17% • Reduce costs 34% Read the complete paper at
  18. 18. Will You PASS? • Reduce costs • Improve response time for inspection • Reduce emergency call-outs • Channel resources to where they’re needed most • Make the best possible impact on the infrastructure, environment and community you serve Read the complete paper at
  19. 19. Learn more … Want to learn more about PASS? Visit to download the complete white paper. Learn more about the technology behind PASS and request a free in-field demo by clicking below: • Quickview airHD zoom camera • Jetscan video nozzle • ROVVER X sewer inspection camera Read the complete paper at