RECENT MES PROJECTS

Algonquin Water Services: LPSCO Palm Valley WRF Upgrade
Litchfield Park is a planned residential community, two miles north of I-10 and 16 miles west of central Phoenix located in Maricopa County.  The Litchfield Park Service Company (LPSCO), an affiliate company of Algonquin Water, provides potable water and wastewater treatment services to residents of Litchfield Park and Goodyear.  LPSCO owns and operates the Palm Valley Water Reclamation Facility (WRF) which is a 4.2-mgd wastewater treatment plant that produces high quality recycled water (class A+).  The recycled water is used to irrigate the golf courses and greenbelt areas within the service area. 

The Palm Valley WRF was designed to be a completely contained facility designed to look like a high end office complex with lush desert landscaping along the street side of the facility.  Even though the facility had an award winning façade, the WRF was plagued with fugitive odors.  Complaints from nearby residents began within months of the plant start up.  After several studies and upgrades of the odor control system, LPSCO was directed by the Arizona Corporation Commission, the state regulatory agency to fix the odor problem by December 31, 2007. In March of 2007, LPSCO selected MES to design process performance enhancements and redesign the odor control system to solve the odor problems that had been plaguing the plant since its start-up in time to meet the ACC deadline. 

MES worked closely with LPSCO’s CM at Risk Contractor and Aerisa Air Technologies to design modifications to the plant’s wet scrubber and implement a full scale pilot of the Aerisa ion-exchange odor control system for the Headworks and Solids Handling buildings.  The pilot unit was installed and fully functional one week ahead of the deadline.  The new ion-exchange odor control equipment completely eliminated odors within the Headworks and Solids Handling building stopping the release of fugitive odors.

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Global Water Resources: 
Water Utilities of Greater Tonopah & Buckeye Water Improvements Project
Global Water, through its wholly-owned subsidiaries the Water Utility of Greater Tonopah (WUGT) and the Water Utility of Greater Buckeye (WUGB), owns a number of Water Distribution Centers (WDCs) that provide potable water to twelve service areas.  For this project MES was retained as program manager and engineer by Global Water Resources to assist in bringing the WDC facilities into compliance with local statutes and national water quality regulations.  Many of the WDCs had compliance issues related to water quality, while others had insufficient storage, insufficient well pumping, or insufficient booster pump station capacity.  Several WDCs required implementation of arsenic treatment systems to improve water quality.  As program manager, MES managed the design-build contractor, coordinated the permitting effort, and oversaw the construction of three arsenic treatment systems for the largest WDCs.  During construction MES was responsible for inspection, start-up, commissioning and validation sampling.  Additionally as part of this project, MES coordinated the first point-of-use permit for individual arsenic removal systems in Maricopa County, which included equipment selection, coordination of 99% homeowner approvals, development of the public informational program, coordination of installation, scheduling of regulatory inspections, and attainment of approvals from MCESD.

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Lennar Homes: Willow Springs WWRF Project
The Willow Springs Wastewater Reclamation Facility (WWRF) is a Membrane Bioreactor wastewater treatment facility being planned to serve a new development area near Oracle, AZ.  MES is the design engineer and construction administration consultant for this CM@R project, which involves the design and construction of a new 0.5-MGD facility expandable to 1.5-MGD.  The facility is being designed to produce A+ effluent for beneficial reuse for golf course irrigation and direct injection to the local aquifer.  The fully odor-controlled process train will include fine screens, MBR treatment, UV disinfection, and solids dewatering

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