CH2M Hill to design advanced water purification facility for city of Oxnard

April 25, 2007
The advanced water purification facility (AWPF) project is a part of the city of Oxnard's Groundwater Recovery Enhancement and Treatment (GREAT) program, whose focus is to use existing water resources more efficiently. A major component of the GREAT program is the use of recycled water for multiple beneficial uses including irrigation of edible food crops, landscape irrigation, injection into the groundwater basin that forms a barrier to seawater intrusion and other possible industrial uses...

OXNARD, CA, April 25, 2007 -- CH2M Hill, a global full-service engineering, construction, and operations firm based in Denver, has been chosen to manage the design of an advanced water purification facility (AWPF) for the City of Oxnard, CA. The facility will provide the city with reclaimed water that can be used for landscape and agricultural irrigation, industrial process water and groundwater recharge.

The APWF project is a part of the City of Oxnard's Groundwater Recovery Enhancement and Treatment (GREAT) program, whose focus is to use existing water resources more efficiently. A major component of the GREAT program is the use of recycled water for multiple beneficial uses including irrigation of edible food crops, landscape irrigation, injection into the groundwater basin that forms a barrier to seawater intrusion and other possible industrial uses.

The recycled water for reuse will be generated by the new AWPF. The source of the recycled water will be the existing city water pollution control facility which has a capacity of 32.5 million gallons per day. The AWPF will treat the secondary water from the city water pollution control facility using a multiple-barrier treatment train consisting of microfiltration/ultrafiltration, reverse osmosis and ultraviolet -light based advanced oxidation processes.

The project will be constructed in two phases, with capacity of the initial phase at 6.25 million gallons per day. The capacity during the build-out phase is expected to reach 25 million gallons per day.

The City of Oxnard has purchased a 4.65-acre parcel located east of Perkins Road and north of a railroad line owned by Ventura County Railroad Company. The City's water pollution control facility occupies land on the west side of Perkins Road. The feed water for the AWPF will be directed from the secondary effluent channel at the WPCF to an inlet structure at the AWPF site.

In addition to agricultural and landscape irrigation, water will be available for local industrial users and groundwater recharge. Farms in Pleasant Valley and along the Santa Clara River will be supplied with the AWPF high-quality water for agricultural irrigation. Additional water will be distributed across the City for landscape irrigation using the remodeled Redwood sewage trunk line.

Groundwater recharge will be conducted by injecting the water into the ground using injection wells along Hueneme Rd. east of the AWPF. The groundwater injection will protect the aquifer from seawater intrusion and provide credit to the City against penalties for over-pumping groundwater. All of the end users (agricultural irrigation, landscape irrigation, injection in the aquifer and industrial) will be served with the highest water quality of the AWPF, which meets the groundwater recharge criteria.

In addition to the key objective of producing purified water, the AWPF will be open to the public and have educational, visitor, and research functions. A portion of the site will contain a demonstration wetland. The wetland feature complete with vegetation. In addition, the wetland system will build upon results from previous pilot wetland studies conducted by CH2M HILL in 2003-2005. The use of this natural system will provide an opportunity for community education, further research and the potential to use such wetland biota for community wetlands restoration.

The initial phase is expected to be fully operational by the end of 2009.

With headquarters in Denver, CO, employee-owned CH2M Hill (www.ch2m.com) is a global leader in engineering, construction, and operations for public and private clients. With $4.5 billion in revenue, it's an industry- leading program management, construction management for fee, and design firm, as ranked by Engineering News-Record (2006). The firm's work is concentrated in the areas of transportation, water, energy, environment, communications, construction, and industrial facilities. The firm has long been recognized as a most-admired company and leading employer by business media and professional associations worldwide. CH2M Hill has over 19,000 employees in regional offices around the world.

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Also see: "CH2M Hill to help lead five year research program on nutrient removal from wastewater"

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