Specifications include, but are not limited to: A. The strip diffuser system shall have the capability to transfer the specified amount of oxygen at standard conditions, Standard Oxygen Transfer Rate or SOTR at standard conditions (14.7 psia, 20° C, zero dissolved oxygen) at the side water depth and maximum allowed air rate and pressure specified below. B. Required Performance (based on 15.00 ft immersion depth) C. Pressure at the top of the drop leg without any influence of valves or other factors of head loss shall not exceed 7.8 psi based on 15.00 ft immersion depth. An additional 0.5 psi of fouling loss shall be incorporated into blower design given this application, plus applicable losses from the top of drop to the blower. D. Strip diffusers system must be capable of operating at 0.6 to 4.8 scfm/sq ft flux rate continuously and at a rate of 0.3 to 0.6 and 4.8 to 7.0 scfm/sq ft for several hours per day in mixed liquor. The low membrane fluxes are required to allow turndown and to minimize mixing limitations and subsequent over-aeration. The high membrane fluxes are required for operational flexibility, i.e., to take zones or a basin out of service. The manufacturer to provide written certification that these operating conditions are acceptable, and that the system is warranted when operated within that range. E. The system shall be capable of intermittent operation without negative effects. F. The design shall allow a complete flexing cycle to be performed to maintain the membrane and its perforations in a clean state. When the pressure in the air distribution system is brought below the hydrostatic pressure at the depth of the diffusers, then the pressure on the inside of the membrane shall also be below the hydrostatic pressure and the membrane shall collapse on to the flat base plate causing a flexing movement of the membrane. G. Strip diffusers shall be AEROSTRIP® T3.0-EU-18 Type as supplied by Ovivo or comparable. The proposed fine bubble strip diffuser shall be a flat strip design using a flexible membrane installed on the basin floor to utilize the full side water depth. H. Diffusers shall be mounted directly to the floor of the tank to allow for maximum SOTE and to minimize mixing energy requirements and eliminate dead zones at the bottom of the tank. For sloped floors, the diffusers shall be mounted at the elevation, such that membrane is no more than 3 inches, from the highest point of the floor which will establish the level plain the diffuser system will be installed at +/- 1/4 inch.”.