Detective Work

Ultrasonic sensors and level-velocity logger help locate illegal hookups creating excessive flows at an Ontario wastewater treatment plant

Excessive flows at the Glen Walter (Ont.) Water Pollution Control Plant were preventing developers from expanding the township of South Glengarry.

Six years after its construction in 1989, the 138,700-gpd treatment plant averaged 124,700 gpd with peak flows of 419,000 gpd,...

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