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City of Los Angeles: Closing the Curtain on Sewer Ventilation

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Abstract:

The City of Los Angeles, Bureau of Sanitation has a long history of implementing proactive and innovative measures to control sewer odors from its wastewater collection system. The North Outfall Replacement Sewer has presented challenges to the City due to on-going air pressurization generated from within the sewer, which have migrated to the surrounding communities. The City has examined and identified mitigation measures to address the positive ventilation conditions on the NORS. These measures include: Hydraulic Flow Management; Construction and operation of air treatment facilities (ATF), Installation of air curtains, and Replacement and upgrade of trap maintenance holes. Implementation of these mitigation measures have significantly reduced and controlled the air pressure from the NORS and has alleviated the odor impacts to the surrounding communities.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864712811741386

Publication date: 2012-01-01

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