333 S. Meridian, Puyallup, WA 98371 - 253-841-4321

City of Puyallup

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AI- 4220   9.    
City Council Agenda
Meeting Date: 02/25/2014  
Subject:    Consultant Contract for the Water Pollution Control Plant Biosolids Dewatering Improvements
Presenter: Rob Andreotti
Department: Public Works  

Recommended Action
Approve and award the contract for the design and construction administration of the Water Pollution Control Plant Biosolids Dewatering Improvements to Gray and Osborne of Seattle in the amount of $698,810, and authorize the City Manager to execute the agreement in a form substantially as approved by the City Attorney.
Currently, sludge dewatering is performed using a 30-year-old belt press that was installed in the early 1980s. The building which houses the press was designed over 60 years ago in the mid-1950s. 
The process of dewatering sludge creates a harsh environment for not only the equipment, but also the building. Due to these conditions, both the belt press and the building have begun to show serious deterioration. In addition, the belt press has exceeded its expected 20-year service life by ten years. 
In 2013, the Water Treatment plant staff performed pilot testing of different types of dewatering devices. Four devices were tested in portable trailers. The objective of the pilot testing was to find a low-speed device that is easy to maintain, can largely run unattended, uses low horsepower, and has a lifespan of 20 to 30 years. Two of the devices tested were rotary press type systems, one was a screw press, and one was a centrifuge system. All four devices represented the most widely used and technologically advanced dewatering systems currently available.

In June of 2013, the Water Treatment plant had also undertaken an engineering study of three different biosolids dewatering technologies to assess the probable cost, operation and maintenance costs, and life cycle costs of the technologies.
From the pilot program and engineering study, Water Treatment plant staff, along with support from Public Works Engineering, advertised for engineering consultants to provide Statements of Qualifications for these types of projects. Gray and Osborne was subsequently selected as the most highly qualified and experienced firm for this type of work.
Previous Actions (Discussions/Presentations)
On June 4, 2013, Council approved a contract with HDR Engineering to perform a dewatering study for the purpose of assessing the probable cost, operation and maintenance costs, and life cycle costs for three different biosolids dewatering technologies.
Summary of Proposal
Under this proposal, the City Council will award a contract to Gray and Osborne for the Water Pollution Control Plant Biosolids Dewatering Improvements project in the amount of $698,810. Gray and Osborne will: review the results of the pilot testing and engineering and dewatering studies; recommend the type of device which is best suited to meet the city's needs; design the project; and administer its construction.
Accept and award the contract for this project:
As noted above, accepting the contract would allow Public Works to move forward with the design of the dewatering improvements.

No action alternative:
Council could choose not to proceed with the design of the project at this time.

Fiscal Impact
Amount Budgeted: $5,575,000
Bid Amount: $698,810
City Funding Needed for Project: $698,810
Funds from Other Sources: 0
Ongoing Staff Costs: 0
Fiscal Impacts:
Consultant's Scope of Work

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