Concord Pacific redeveloped and built 514 market residential units over two high- rise towers, 70 market rental units, and a 37 space day-care within a six and a half story mid-rise building. The new multi-building complex has a gross area of more than 455,000 square feet plus 411 underground parking spaces. This redevelopment is located at the heart of a development plan for increased density by way of towers, creating a transit-oriented hub that is adjacent to the Marine Drive Canada Line station. Treatment of stormwater for this development was critical due to the site's proximity to the Fraser River and the various fish that navigate its waters including: the White Sturgeon, Salmon, and Steelhead Trout.
This redevelopment was required to meet the Green Buildings Policy for Rezonings,including a minimum of 63 points in the LEED® rating system, at least six optimize energy performance points, one water efficiency point, and one storm water point. These requirements for water quality treatment initiated the need for the Jellyfish® Filter. This project also required a filtering treatment device to fit within a limited footprint in the parking garage of the building. Imbrium used the Jellyfish model JF8-10-2-40C to meet the water quality objectives by treating a maximum flow of 41.7 L/s, which meets or exceeds 90% of the average annual runoff based on 11 years of Vancouver rainfall data for this site. This model has a sediment capacity of 462 kg, which meets or exceeds the estimated average annual sediment load from the 0.82 ha site. It is estimated that the Jellyfish Filter will keep approximately 0.8 lbs of total phosphorus, 0.6 lbs of lead and zinc, and 700 lbs of sediment from running off into the Fraser River annually (based on USA EPA Typical Pollutant Loading for Urban Land Use, Horner et al, 1994).
The above ground, free standing Jellyfish Filter was designed to meet the limited space and height restrictions presented in the below deck parking lot location. To further reduce the treatment footprint, instead of using upstream control manhole strctures, a simple bypass piping plumbing configuration proposed by Imbrium engineering was implemented to ensure large storm event generated flows bypassed around the Jellyfish system. The Jellyfish Filter was installed in a 8-foot diameter pre-cast concrete manhole, engineered and tested for water tightness. The installation was completed in less than fours hours, which was expedient given the provided working space.