Specifications include, but are not limited to: The City of Chandler (City) owns and operates two water reclamation facilities, the Airport Water Reclamation Facility (AWRF), and the Ocotillo Water Reclamation Facility (OWRF). The AWRF, located at the southwest corner of McQueen Road and Queen Creek Road, has a permitted capacity of 27 million gallons per day (MGD). The AWRF receives gravity flows from domestic users and a blend of domestic and industrial flows from the OWRF Influent Pump Station (IPS). The AWRF produces Class A+ reclaimed water using a Modified Ludzak -Ettinger (MLE) process. The OWRF, located at the southeast corner of Old Price Road and Queen Creek Road, has a permitted capacity of 18 MGD. The OWRF has two treatment trains that produce Class A+ reclaimed water – MLE train, referred to as MLE, permitted at 11.4 MGD and Membrane Bioreactor (MBR) train at 6.6 MGD.; Various components of AWRF and OWRF are in need of repair, rehabilitation, replacement, and other improvements in order for the water reclamation facilities to operate in a safe, reliable and energy-efficient manner. The City has performed numerous risk and condition assessments to determine the highest priority improvements to both facilities. Examples of some of the necessary improvements for this project include but are not limited to: the replacement of the Aeration Basins fine bubble aeration system, the rehabilitation of secondary clarifiers; addition of a sixth Disc Filter, odor control improvements at the Headworks, improvements of the chemical feed facilities, addition of stairs at Prestage Basin No. 2, and other associated upgrades.; This project also includes upgrades to the AWRF SCADA system to include upgrades to legacy hardware and software. The project will replace the existing Foxboro I/A Distributed Control System (DCS) with Modicon PLCs and Wonderware Human Machine Interface (HMI). This effort may entail hardware replacement and upgrades to operational technology (OT). The project will include procurement and installation of new virtual machine servers, software packages, and creation of SCADA software screens.
