ADS detects Chicago leak in 36" watermain

• New leak technology pinpoints leaks without intrusion

HUNTSVILLE, AL, Dec. 11, 2007 -- ADS® LLC announced recently that The Pitometer Group of ADS™ has recently been successful in locating a leak for the city of Chicago in a 36" PCCP watermain. As service providers to the city of Chicago for over 40 years, ADS is now able to detect leaks in pipes as large as 60" thanks to a new large diameter leak detection technology.

This new technology pinpoints leaks in large diameter mains without the set-up intensive, and intrusive, techniques used by other technologies. ADS is the only authorized service provider of this technology, which utilizes the Echologics LD Leakfinder for large diameter leaks.

ADS was asked to locate a potential leak on a 36" concrete main on September 11, 2007. The leak was showing in a basement of a nearby building. Echologics Hydrophone sensors were placed on the hydrants off the 36" main at a distance of 829 feet. After implementing the signal processing algorithms, the leak came up instantly, and was located to within inches. The leak was found to be located at a concrete to iron adaptor with a torn gasket.

ADS has proven they can find leaks in large pipes without inserting equipment into the pipe. The accuracy of this technology in pinpointing the leak is also superior to other technologies. ADS provides leak detection services to the city of Chicago as part of a Hydraulic Engineering Services contract that also includes, loss of head tests, flow and pressure measurements, flow profiling, hydraulic gradients, fire flow tests and valve exercising.

ADS LLC develops and provides technology-based products and services for the water, wastewater, and hydroelectric industries through three divisions, ADS Environmental Services, Hydra-Stop®, and Accusonic Technologies®.

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