Specifications include, but are not limited to: 1. Ultrafiltration membrane modules suitable for use in OWNER’s existing Columbia Heights Membrane Plant. a. The plant has 40 membrane units, each housing one hundred (100) membrane modules. 1) The current modules in use are the X-Flow XIGA 40 (CAPFIL SXL–225) and dizzer® L 0.9 MB 40 PB. 2) The existing pressure vessel/housings are ProTec PRO 8N-75-SP (75 psi rated, side port). 2. Modules shall be ANSI/NSF 61 certified. 3. Modules shall be ANSI/NSF 419 certified for 4.3-log or greater removal of Cryptosporidium 4. Modules of same model proposed shall have been in use at the Owner’s plant during the 2017 demonstration project (as provided under City of Minneapolis OP 8399 and related price quotations).