Title
AUTHORIZATION TO ENTER INTO AMENDMENT NO. 1 TO THE PROFESSIONAL SERVICES AGREEMENT WITH HDR ENGINEERING, INC., FOR ASSESSMENT OF THE WEST AREA WATER RECLAMATION FACILITY RECHARGE STORAGE
Staff Contact: Craig Johnson, P.E., Director, Water Services
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Purpose and Recommended Action
Recommendation
This is a request for City Council to authorize the City Manager to enter into Amendment No. 1 of the Professional Services Agreement C-10515 with HDR Engineering, Inc., (HDR) for assessment of the recharge options available for the West Area Water Reclamation Facility. This amendment provides for detailed analysis of the hydrologic recharge capabilities of the Heroes Park site; and increases the original agreement compensation by $54,100.
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Background
The West Area Water Reclamation Facility (WAWRF) commenced operations in 2001. This facility has a capacity of processing 11.5 Million Gallons per day (MGD) of wastewater. Currently it treats approximately 5.5 MGD but it is expected to see a gradual and steady increase of flow due to growth in the west area of the city. As part of the treatment process, Class A+ effluent is discharged from the facility. The majority of this reclaimed water is sent to Glendale’s West Area Aquifer Recharge Facility (ARF) and the New River Agua Fria Underground Storage Project (NAUSP) managed by SRP. A small portion of the reclaimed water produced is delivered to reuse customers.
In 2010, the city developed a master plan for the West Area Water Reclamation Facility. The 2010 study examined wastewater treatment demands, and evaluated potential recharge options. The study determined there would be a need for additional recharge capacity in the future, and identified the Western Area Regional Park (now known as Heroes Regional Park) as a potential location for a new recharge facility. The 2010 study recommend a series of individual wells as the preferred method of recharge at the park site.
In December 2015 HDR was contracted to update the 2010 park site evaluation. This included an assessment of increasing the recharge capacity of the West Area Recharge Facility and adding a new recharge facility at Heroes Park. Based on preliminary research conducted to date, the consultant has determined that capacity could be increased at the existing aquifer recharge facility and recharge capacity added at Heroes Park. The initial research concluded that recharge at Heroes Park may be best conducted using multi-purpose lakes. Recharge wells also continue to be a viable option.
Based on the positive initial research results, a hydrologic field assessment of the park site must be performed to determine the physical capacity of the site to receive reclaimed water from the West Area facility. Specifically, the hydrogeologic investigation needs to collect detailed field data to analyze if the Heroes Park site will be favorable for basin/lake recharge activities.
Analysis
Staff advertised a request for proposal (RFP) Project 141509 for engineering services to assess the recharge storage options. There were three respondents. HDR was selected to perform the services for an amount not to exceed $186,354. Because the outcome of the evaluation could not be predetermined, the original proposal did not include field investigations. Now that the initial research has determined that basin recharge appears feasible at Heroes Park, field verification is needed. HDR has the capability to perform the additional scope of work for $54,100 through an amendment of the contract C-10515.
Previous Related Council Action
On December 8, 2015, Council approved a professional services agreement with HDR to provide an assessment of West Area water reclamation facility recharge storage.
On January 27, 2009, City Council approved the professional services agreement for the West Area Water Reclamation Facility, Phase IV Expansion Study.
Community Benefit/Public Involvement
The final report of the 2012 Ad Hoc Citizen Task Force on Water and Sewer recommended that the City should maximize the use of existing water resources through water reclamation and aquifer storage. Development of long-term recharge storage credits from expanded recharge capacity will help the City maintain a sustainable water supply. Coordinating storage methods in collaboration with the Community Services Department will ensure that potential recharge options are compatible with current conceptual design elements at Heroes Park.
Budget and Financial Impacts
Funding is available in the Water Services FY2016-17 capital budget.
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Cost |
Fund-Department-Account |
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$54,100 |
2400-61052-551200, Recharge Storage Assessment |
Capital Expense? Yes
Budgeted? Yes
Requesting Budget or Appropriation Transfer? No
If yes, where will the transfer be taken from?