New Sewer & Water Assessment and Pipe Rehabilitation Certification Guidelines Unveiled at 2016 NASTT Show
Electro Scanning Inspection Recommended to Certify Trenchless Lining and New Installations
Sacramento, Calif. – March 11, 2016 – Electro Scan, Inc. announced that it will unveil new certification standards for sewer and water pipe rehabilitation at the 2016 NASTT Show.
New guidelines emerged after finding that major defects were consistently not found using Closed Circuit Television (CCTV) inspection, prior to the acceptance of Cured-in-Place Pipe (CIPP) lining and Sewer Survey Evaluation Studies (SSES) projects.
Defects not identified or accurately measured by visual inspection, include accelerator burns, bad service connections, cracks, cuts, defective inverts, over-cooking, and wrinkles – causing increased maintenance and severely reducing the useful life of the asset, if not properly fixed by the Contractor.
In contrast, new guidelines recommend locating and estimating the size of each defect – in gallons per minute – by measuring the variation in electric current able to pass through each defect or opening, in accordance with ASTM F2550.
New standards of practice were recently added to Chapter 4, Inspecting and Testing Collection Systems, in the industry’s leading manual, Volume 1, Operation and Maintenance of Wastewater Collection Systems, Seventh Edition, recommending the use of Electro Scanning Inspection, published December 2015.
Co-authored by the late Ken Kerri, Ph.D., P.E., Office of Water Programs, Dr. Kerri concluded that while CCTV inspection provides good visual documentation of sewer maintenance issues, like grease, roots, and debris, CCTV is not the best choice to provide an accurate structural assessment of sewer mains or service laterals, especially given the advantages of Electro Scanning Inspection for certifying CIPP rehabilitation and SSES projects.
Volume 1 & 2 of the O&M Wastewater Collection manual, originally introduced in the 1970s, is referenced in the EPA’s Capacity, Management, Operation, and Maintenance (CMOM) Program.
A key advantage of using Electro Scanning Inspection is its ability to automatically differentiate between superficial surface cracks – that do not leak – and cracks or defects that extend completely through a pipe or liner – that represent major leaks.
Common remedies to fix defects identified by Electro Scanning Inspection include liner or pipe removal & replacement and trenchless point repair.
Utilities are recommended to reference ASTM F2550-13, Section 8.5.1 and the Operation and Maintenance of Wastewater Collection Systems manual, Section 4.40-4.45, to certify any pipe repair, relining, or renewal project.
During the conference, Electro Scan will also discuss its new Water Leak Detection Services – incorporating its low voltage conductivity expertise as part of its patent-pending Multi-Sensor Water Probe – designed for pressurized water mains and transmission pipes.
Electro Scanning Inspection, also called Low Voltage Conductivity Testing, is expected to be included in the upcoming AWWA M77 Water Main Condition Standard of Practice later this year.
Founded in 1990, the North American Society for Trenchless Technology (NASTT) promotes responsible ways to manage underground infrastructure.
The conference will be held March 20-24, 2016 at the Gaylord Texan Convention Center, Grapevine, Texas.
About Electro Scan
Founded in 2011, the Company develops and markets smart pipe condition assessment products and services that automatically locate, measure, and report defects in water, sewer, storm drains, culverts, and gas pipelines.
Contact
Carissa Boudwin, Tel: +1 916 779 0660, Email: carissa@electroscan.com