Collection Systems Discussion

PWO Seminar

August 7, 2014

Zachary B. Collins, PE, CWP, LEED AP, CDT

Introduction About Your Speaker

Education and Professional Credentials Work History Networking and Volunteering Family and Free Time

Presentation Topics What are the problems? How do we assess the problems? What are the solutions? What are the results?

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

What are the problems? Rainfall induced Inflow and Infiltration

Reduction in capacity Increased treatment Costs

Blockages Property Damage Sanitary Sewer Overflows

Money Being proactive has many unknowns Being reactive is expensive

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

What does the EPA Say? “Sanitary sewer collection systems are designed to remove

wastewater from homes and other buildings and convey it to a wastewater treatment plant. The collection system is a critical element in the successful performance of the wastewater treatment process. EPA estimates that collection systems in the U.S. have a total replacement value between $1 and $2 trillion. Under certain conditions, poorly designed, built, managed, operated, and/or maintained systems can pose risks to public health, the environment, or both. These risks arise from sanitary sewer overflows (SSOs) from the collection system or by compromised performance of the wastewater treatment plant. Effective and continuous management, operation, and maintenance, as well as ensuring adequate capacity and rehabilitation when necessary, are critical to maintaining collection system capacity and performance while extending the life of the system.” (EPA’s : Guide For Evaluating Capacity, Management, Operation, And Maintenance Programs At Sanitary Sewer Collection Systems)

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Assessment of Pipes Closed Camera Video Inspection Smoke Testing Dyed Water Testing Air Testing Mandrel Testing Allowable Leakage Testing Flow Monitoring Hydraulic Modeling

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

CCTV

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Smoke Testing

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Dyed Water Testing

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Air Testing

Collection Systems

4 psi start pressure with less than 0.6 drop

Testing time depends on diameter

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Rehabilitation and Repair of Sanitary Sewer Mains Jet Balling / Pressure Washing / Root Cutting Pipe Liners

Cure in Place Pipe PVC fold-n-form liner HDPE slipliner

Spot Repairs Shot-crete Joint Sealing Service Connection Rehabilitation

High Velocity Protection Pipe Replacement

Directional Drilling Open Excavation

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Jet Balling, Power Washing, & Root Cutting

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Pipe Liners

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Spot Repairs

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Assessment of Manholes Visual Inspection

Ring, Cover, and Grade Rings Access Hole and Steps Bench and Channels Pipe Connections and Invert Finish Base, Barrels, and Risers

Field Testing Vacuum Testing Allowable Leakage Test

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Ring, Cover, and Grade Rings Access Space Inflow and Structural Integrity

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Access Hole and Steps Steps or no steps?

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Benches and Channels Channel Geometry, Bench Drainage, etc.

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Pipe Connections and Invert Grouting

1-2” and smooth grouting for easy flow

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Base, Barrel, and Risers

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Vaccum Testing Minimum 10” Hg start pressure Less than 1” drop in 1 minute

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Rehabilitation and Repair of Manholes High velocity protection Structural Repairs Interior Lining Partial or Full Replacement

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

High Velocity Protection Incoming pipe at High Grade and/or

sharp change in alignment

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Structural Repair Combination of

Grout/Concrete patching and a spray-on or inserted liner

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Interior Lining Concrete/Grouting, Fiberglass, Plastic, etc.

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Partial or Full Replacement When the previous design or construction

was incorrect or the structure or pipe is just too deteriorated to rehabilitate…CALL the ENGINEER!

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT

Conclusion and Questions Pipe Assessment and Rehabilitation Manhole Assessment and

Rehabilitation Questions?

Collection Systems

August 7, 2014 Zachary B. Collins, PE, CWP, LEED AP, CDT