Arbutus Mountain Estates – Wastewater Treatment

Arbutus Mountain Estates Sewer System services the residential development Estates of Shawnigan Station located south of Shawnigan Lake on Shawnigan Lake Road in Area B. There are 123 customers located in the service area. The Wastewater treatment system is owned and operated by the CVRD under existing Permit PE- 14798. The permit is authorized from a 120-unit modular home park, with maximum discharge of 137 m3/d, discharging Class A effluent to ground, with seasonal phosphorous removal requirements.

The plant upgrades included the addition of a new SLB 848 preliminary screening system to enhance solids and biological removal for treatment improvements. The addition of a new 15,500 gal (40m3) Polyethylene EQ tank located outside to provide a buffer for incoming flows, and allow equalization of peak hour flows. Aeration provided with duplex air compressors from within the building, with a loss of air alarm provided back to the Programmable Logic Controller (PLC). Time dosed duplex pumps will operate on a Time On – Time Off sequence which is adjustable at the main Programmable Logic Controller (PLC) to allow flows to equalize over the 24-hour period.

Client: Performing Equity Shawnigan Limited Partnership C/O Dale Bellavance
Location: Shawnigan Station
Project Manager: Mike Seymour