HomeMy WebLinkAbout04. Approve agreement with Carollo Engineers for design of the Mechanical and Concrete Renovations, DP 7351, and planning for the Influent Pump Electrical Improvements, DP 7328 Page 1 of 3
Item 4.
CENTRAL SAN BOARD OF DIRECTORS
' POSITION PAPER
MEETING DATE: MARCH 1, 2018
SUBJECT: AUTHORIZE THE GENERAL MANAGER TO EXECUTE A PROFESSIONAL
ENGINEERING SERVICES AGREEMENT IN AN AMOUNT NOT TO EXCEED
$850,000 WITH CAROLLO ENGINEERS INC. FOR DESIGN OF THE
MECHANICALAND CONCRETE RENOVATIONS, DISTRICT PROJECT
7351 AND PLANNING FOR THE INFLUENT PUMP ELECTRICAL
IMPROVEMENTS, DISTRICT PROJECT 7328
SUBMITTED BY: INITIATING DEPARTMENT:
NANCY MOLINA, ASSOCIATE ENGINEER ENGINEERINGAND TECHNICAL SERVICES-
CAPITAL PROJECTS
REVIEWED BY: CRAIG MIZUTANI, SENIOR ENGINEER
EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER
JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL
SERVICES
Roger S. Bailey
General Manager
ISSUE
Board of Directors' (Board) authorization is required for the General Manager to execute a professional
engineering services agreement in an amount greater than $100,000.
BACKGROUND
The gates, concrete, and other miscellaneous equipment and surfaces within the Headworks, Pre-
Aeration, and Primary Treatment areas of the treatment plant are exposed to corrosive environments.
Many of these areas contain slide gates and equipment that are essential to isolate and re-direct flows for
preventative maintenance of facilities and for emergency or wet weather scenarios. Additionally, there are
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some structures and concrete surfaces that have spalling concrete, corroded reinforcing bars, and show
signs of significant cracking or are leaking. This project is to address these aging infrastructure needs and
improve the safety and reliability of the existing equipment and structures.
To date, several major project elements have already been identified as follows:
• Replace the embedded floor primary tank rails and upper rails;
• Replace grit piping and improve redundancy for grit washers;
• Replace or rehabilitate influent structure gates, pre-aeration gates, primary influent gates, and primary
effluent channel stop plates;
• Minor odor control improvements; and
• Structure repairs at the west gallery and dry pump room in Headworks to address leaks.
I n addition, the variable frequency drives (VFD) and the motors for the influent pumps will also be
evaluated under this project. Operations has reported multiple issues with the current VF Ds and
replacement will most likely be recommended. If the VFD issues continue, staff may return to the Board
requesting an amendment to design a long-term solution.
On January 4, 2018, a Request for Proposals (RFP)was publicly advertised on Central San's website
and PlanetBids, a service Central San uses to advertise electronically for solicitation of proposals. Two
firms responded with qualified and responsive proposals. After evaluating the proposals based on
qualifications, and proximity to Central San, staff invited both firms to participate in an oral interview. The
two firms were Carollo Engineers, Inc. (Carollo) and HDR Engineering, Inc. Based on the combined
score of the RFP and interview, staff selected Carollo.
Carollo's scope for the agreement will generally include a detailed investigation and assessment on
multiple locations where concrete corrosion has been identified and provide recommendations for
rehabilitation. The condition of multiple gates and other mechanical equipment in the Headworks, Influent
Pumping Station, Pre-Aeration, and Primary Treatment areas will also be assessed and recommendations
will be provided for rehabilitation or replacement. Lastly, Carollo's design services will include the pre-
design, final design, and detailed construction cost estimate for this project.
CEQA:
Staff has concluded that this project is exempt from the California Environmental Quality Act (CEQA)
under Central San CEQA Guidelines Section 15301, since it involves minor alterations to existing public
facilities involving no expansion of use. Approval of this project will establish the Board's independent
finding that this project is exempt from CEQA.
ALTERNATIVES/CONSIDERATIONS
On August 3, 2017, the Board authorized a construction contract change order to repair the Primary
Sedimentation Tanks (PST). The work included replacement of the embedded rails on PST Nos. 1 and 2
and new chains/flights for PST Nos. 2 and 3. This project included the scope of work under the repair;
however, due to several failures and issues, staff recommended to immediately repair the tanks prior to the
upcoming wet weather season. The remainder of the scope within the primary tanks will be addressed
under this project.
FINANCIAL IMPACTS
The agreement cost ceiling is $850,000, which includes preliminary and final design services. This
agreement will be funded under the Mechanical and Concrete Renovations listed in the Fiscal Year(FY)
2017-18 Capital I mprovement Budget (Cl B) on page 163, which has an estimated total project budget of
$6,906,000, which includes $100,000 for planning and $950,000 for design. To date, approximately
$797,000 has been spent due to the urgent change order work performed late last year in the Primary
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Sedimentation Tanks. The VFD evaluation will be paid for by the Influent Pump Electrical Improvements,
District Project(DP) 7328.
This agreement will span into next fiscal year and construction is anticipated to take place between the dry
weather seasons of FY 2018-19 to FY 2019-20.
Financial Impact Table: Amount
0 Funds budgeted this FY 2017-18 for this project $560,000
❑ Funds taken from current FY 2017-18 C I B contingency $ 0
Funds transferred from current FY 2017-18 projects:
❑ a. Updated forecast; estimated savings from project available $ 0
D b. Acceleration of funds for project that is budgeted in future year $190,000
0 c. Combined project scope for bidding purposes: DP 7328 $100,000
d. Potential future year budget impact
❑ (May be mitigated through (1) savings from close-outs of current $ 0
year projects; (2) reprioritizing future year projects; (3) cost
savings on future year projects)
Total Current Year Cost $850,000
COMMITTEE RECOMMENDATION
The Engineering and Operations Committee reviewed this agreement at the meeting on February 20,
2018, and recommended approval.
RECOMMENDED BOARD ACTION
Authorize the General Manager to execute a professional engineering services agreement with Carollo
Engineers, I nc. in an amount not to exceed $850,000 under the Mechanical and Concrete Renovations,
DP 7351 and the Influent Pump Electrical Improvements, DP 7328.
Strategic Plan Tie-In
GOAL TWO: Strive to Meet Regulatory Requirements
Strategy 1 - Strive to Achieve 100%Permit Compliance in Air, Water, Land and Other Regulations
GOAL FIVE: Maintain a Reliable Infrastructure
Strategy 2- Facilitate Long-term Capital Renewal and Replacement
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