The City of Delta has issued a request for proposals for an engineering consultant to come up with proposed better odour mitigation measures for a major sanitary pump station located in a residential area.
Built in 1968, the Manor North Sanitary Pump Station, located at 5051 Central Ave., is one of the major stations that pumps sanitary flows out of the Ladner area.
The city notes that as the station manages more effluent and is located within a local neighbourhood, odour control has been a concern.
Upgrades were completed in 1983 and one of the odour control means is a biological filter that is located east of the pump station.
Another means for odour control that Delta is carrying out is conducting H2S (hydrogen sulfide) dosing around the upstream.
The pump station also has an UV-based unit inside that helps with odour control, however, the city notes the unit is at the end of its service life, so Delta is seeking other means of odour control that is more efficient and cost effective.
Odour control options for the pump station could include replacing the odour control unit, changing the aerobic or anaerobic environment, better air circulation, bio-filters, activated carbon, dosing or scrubbers.
A final report is to be submitted to the city by the end of June.
Meanwhile, the city has also issued a request for proposals for the design and construction management of upgrades for the Beharrell Drainage Pump Station, located at the end of Beharrell Ditch and Boundary Bay Dike Road, near 3808, 96 St.
It is one of the pump stations in the Boundary Bay area that drains the low-lying farm areas of East Ladner. The original pump station was built in the early 1920s and it was replaced in 1994 with the existing pump station.
The city is looking to increase the capacity of the station and add a generator for backup power.
