304 SE EVERETT MALL WAY PANERA BREAD 2025-07-25

B. Filter Cartridges: External shell of the filter cartridges shall be substantially constructed of polyethylene or equivalent material acceptable to the manufacturer. Filtration media shall be arranged in a layered fashion to maximize available filtration area. An orifice plate shall be supplied with each cartridge to restrict flow rate to a maximum of 30 gpm. C. Filter Media: Filter media shall be by BaySaver Technologies Inc. or approved alternate. Filter media shall consist of the following mix. Sand media shall have an effective particle size of not more than 0.49mm, it shall have an angular grain shape, a hardness of 7, be 99% silica, and not leach nutrients. The media shall also include a blend of Perlite and Activated Alumina. 2.2 PERFORMANCE A. The stormwater filter system shall be capable of treating 100% of the required treatment flow at full sediment load conditions. B. The stormwater filter system's cartridges shall have no moving parts. C. The stormwater treatment unit shall be designed to remove at least 80% of the suspended solids load. Said removal shall be based on full-scale testing using SIL-CO-SIL 106 media gradation with a d50 of 23 microns (manufactured by US Silica) or equivalent. Said full scale testing shall have included sediment capture based on actual total mass collected by the stormwater filtration system. D. The stormwater filtration system shall reduce incoming turbidity (measured as NTUs) by 50% or more and shall not have any components that leach nitrates or phosphates. E. The stormwater filtration cartridge shall be equipped with a hydrodynamic backwash mechanism to extend the filter's life and optimize its performance. Inlet flow shall be upflow. F. The stormwater filtration system shall be designed to remove a minimum of 50%of the incoming Total Phosphorus (TP) load. G. The stormwater filtration system's cartridges shall have the following minimum flow and sediment load capacities: BaySaver Technologies, Inc. 2 03/31i09-Version 2.0