HomeMy WebLinkAbout06. (Amended) Award a construction contract and execute service agreement and amendments for Electric Blower Improvements, Treatment Plant Piping Renovations-Phs 10, DPs 100015 & 7369 Page 1 of 8
Item 6.
Amended (Handout)
CENTRAL SAN BOARD OF DIRECTORS
WE VS.101 M POSITION PAPER
MEETING DATE: JULY 15, 2021
SUBJECT: AMENDED AWARD A CONSTRUCTION CONTRACT IN THE AMOUNT OF
$9,594,300 TO AUBURN CONSTRUCTORS, LLC, THE LOWEST
RESPONSIVE AND RESPONSIBLE BIDDER FOR THE ELECTRIC
BLOWER IMPROVEMENTS, DP 100015 AND TREATMENT PLANT PIPING
RENOVATIONS, PHASE 10, DP 7369; FIND THESE PROJECTS ARE
EXEMPT FROM THE CALIFORNIA ENVIRONMENTAL QUALITYACT; AND
AUTHORIZE THE GENERAL MANAGER TO EXECUTE THE CONTRACT,
SUBJECT TO CONTRACTOR COMPLIANCE WITH SUBMITTAL
REQUI REMENTS, AND:
• AMEND TWO EXI STI NG AGREEMENTS WITH 1) HDR, I NC. I N THE
AMOUNT OF $450,000, INCREASING THE COST CEILING TO
$5,776,000, AND 2) LEE & RO, INC. IN THE AMOUNT OF $300,000,
INCREASING THE COST CEILING TO $800,000; AND
• EXECUTE A PROFESSIONAL ENGINEERING SERVICES
AGREEMENT I N AN AMOUNT NOT TO EXCEED $800,000 WITH
CAROLLO ENGINEERS, INC. TO PROVIDE CONSTRUCTION
MANAGEMENT SERVICES
SUBMITTED BY: INITIATING DEPARTMENT:
NANCYA. MOLINA, ASSOCIATE ENGINEER ENGINEERING AND TECHNICAL SERVICES-
CHATHURAABEYRATHNA, ASSOCIATE CAPITAL PROJECTS
ENGINEER
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
July 15, 2021 Regular Board Meeting Agenda Packet- Page 48 of 118
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ISSUE
The Board of Directors (Board) must award the contract or reject bids within 50 days of the bid opening.
Authorization is required for the General Manager to execute the Contract Documents subject to submittal
requirements and include up to a 15-percent contingency. Authorization is also required to amend an
existing agreement and execute an agreement in an amount over$200,000.
BACKGROUND
Novel Coronavirus (COVI D-19) 1 mpact: I n the midst of COVI D-19, Central San continues construction
activities as an essential service and infrastructure provider under guidelines provided by Contra Costa
Health Services, Occupational Safety and Health Administration, state and federal agencies. The
construction contract includes strict provisions to mitigate the spread of COVI D-19, such as personal
protective equipment, handwashing stations, and other safety items, practices, and procedures as
guidelines become more restrictive or lessen.
Electric Blower Improvements, District Project (DP) 100015 (Blower Project): On July 16, 2020, the
Board authorized the Blower Project and on November 19, 2020, authorized the procurement of three new
electric blowers and associated electrical systems. The new blowers are to be District-supplied equipment
to an installing contractor and manufactured byAPG-Neuros Inc. (APGN). As part of the procurement
contract with APGN, the engineering requirements and design was closely coordinated with Central San's
design engineer, HDR, Inc. (HDR), to create technical bid documents for the installation of the new
equipment. The APGN equipment is under fabrication and the first blower is expected to arrive by 2022.
The Blower Project scope of work includes the installation of three new 35,000 standard cubic feet per
minute electric blowers, variable frequency drives (VFDs), chillers, replacement filter houses, major
electrical components, and control equipment. In addition, civil improvements are required in the Pump
and Blower Building to accommodate the new large electrical transformers under the project.
Aeration air and the blowers are critical to the wastewater treatment plant (plant) process and insufficient air
over a prolonged period of time could result in National Pollutant Discharge Elimination System (NPDES)
Permit compliance issues resulting from biological upsets. The Blower Project will provide full redundancy
for backup or emergency conditions for the blowers and allow for safe operations and reliability for the
electrical blowers to be used with the existing standby generators or cogeneration system in the case of
power outages, PG&E Public Safety Power Shutoffs or planned shutdowns related to other projects like
the Solids Handling Facility Improvements.
Treatment Plant Piping Renovations, Phase 10, DP 7369 (Piping Project):
Many of the plant's piping and related systems have been in place for nearly forty years or more and have
required repairs or temporary solutions. Failures of such piping systems reduce reliability and can
adversely impact the plant and its process.
The Piping Project will renovate and/or replace various piping, instrumentation, and equipment in the plant
that have been identified by Engineering, Operations, and Maintenance staff as in need of immediate
replacement. The scope includes various modifications, such as replacement of the secondary scum
piping system, replacement and improvements to the sodium hypochlorite injection system, and various
improvements to the potable water system. The project will also replace electrical equipment such as the
VFDs for pumps and other equipment.
Construction and Consultant Contracts: Capital Projects decided to combine the Blower and Piping
Projects for bid under one general contractor due to the similarity in scope, shared site locations, and
other project or cost benefits.A combined project map is seen in Attachment 1. Staff, with the assistance
of HDR (Blower Project) and Lee & Ro, Inc. (Piping Project), prepared the bid documents and the
July 15, 2021 Regular Board Meeting Agenda Packet- Page 49 of 118
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projects were publicly advertised on May 10 and 17, 2021. The overall Engineer's estimate for
construction was $14,000,000. Central San received three sealed bids, ranging from $9,594,300 to
$10,979,047 on July 1, 2021.A summary of bids received is shown in Attachment 2.
The Capital Projects Division conducted a technical and commercial review of the bids and determined
that Auburn Constructors, LLC is the lowest responsive and responsible bidder with a bid amount of
$9,594,300.
Central San staff will construction manage the projects with the assistance of services provided by outside
consultants. Central San will continue with HDR and Lee & Ro, I nc. for engineering services during
construction (ESDC). Staff has negotiated fees and a cost ceiling for the ESDC work with both designers
to be performed on an as-needed basis.
On May 24, 2021, Central San issued a Request for Proposal (RFP)for as-needed construction support
services for the Capital Program including the Blower and Piping Projects. The intent of the services is to
support Central San staff with resident engineering and electrical, instrumentation, and controls specialty
inspection tasks, as well as the typical construction management services. On June 18, 2021, Central
San received four proposals. After a detailed review, staff interviewed the top three proposers and Carollo
Engineers, I nc. (Carollo) ranked as the top firm for the Blower and Piping Project. This determination was
based on experience, references, specialty electrical knowledge of key personnel, and fees.
As part of the RFP, staff will be recommending a future $500,000 contract revision with Carollo to include
the same services on an as-needed basis for other projects in the Capital Program. A second firm, MW H
Constructors, has also been selected for as-needed services for the same amount, and the Board will
consider these agreements at a future Board meeting.
California Environment Quality Act(CEQA)
Staff has concluded that these projects are exempt from CEQA under CEQA Guidelines Section 15302,
because they involve replacement of existing sewer facilities at substantially the same locations and with
the same purpose and level of activity as the facilities being replaced. Approval of these projects will
establish the Board's independent findings that these projects are exempt from CEQA.
ALTERNATIVES/CONSIDERATIONS
The Board could consider the following alternative:
1. Reject all bids, which is not recommended. The project will increase the reliability to the aeration
system and the secondary process area and provide for long-term reliability and operational
performance.
FINANCIAL IMPACTS
The total estimated project cost for the Blower and Piping Project totals $18,845,000, which includes
planning, design,APGN equipment pre-purchase, construction contract, contingency, construction
management, and consultant costs as detailed in Attachment 3. Staff is recommending a contingency of
15-percent since both projects include heavy renovation within an operating facility. The contingency will be
used to cover costs associated with differing site conditions or requests made by Central San to reliably
operate the facilities.
The combined budget for the work is estimated at$21.7 million (M) and can be found on page 244 in the
Fiscal Year(FY) 2021-22 Budget for the Treatment Plant Piping Renovations, Phase 10 ($5.95 M) and
page 256 for the Electric Blower Improvements ($15.75 M). The remainder or unused budget shall be
transferred to the FY 2021 Capital Improvement Budget Contingency account.
July 15, 2021 Regular Board Meeting Agenda Packet- Page 50 of 118
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HDR was hired under a solicitation for services under the Steam and Aeration Blower Systems
Renovations, DP 7349, which includes the scope for the Blower Project and the Aeration Basins Diffuser
Replacement and Seismic Upgrades (Diffuser/Seismic). At the May 6, 2021 Board meeting, the HDR
Agreement was increased to a cost ceiling of $5,326,000 for the Diffuser/Seismic Project. Staff
recommended a phased approach with the work scope performed by HDR to better meet the needs of
Central San's replacement program. The additional $450,000 for ESDC services for the Blower Project
will increase the cost ceiling to $5,776,000.
COMMITTEE RECOMMENDATION
The Engineering and Operations Committee reviewed this matter at its July 13, 2021 meeting and
recommended Board approval.
RECOMMENDED BOARD ACTION
Staff recommends the following:
1. Find the projects are exempt from CEQA;
2. Award a construction contract in the amount of$9,594,300 to Auburn Constructors, LLC, the lowest
responsive and responsible bidder for the Electric Blower Improvements, District Project 100015
and Treatment Plant Piping Renovations, Phase 10, District Project 7369;
3. Authorize the General Manager to amend an existing professional services agreement with HDR,
Inc. in the amount of$450,000, increasing the cost ceiling to $5,776,000;
4. Authorize the General Manager to amend an existing professional services agreement with Lee &
Ro, Inc. in the amount of $300,000, increasing the cost ceiling to $800,000;
5. Authorize the General Manager to execute a professional engineering services agreement in an
amount not to exceed $800,000 with Carollo Engineers, Inc. to provide construction management
services; and
6. Authorize the General Manager to execute the Contract Documents subject to submittal
requirements and include up to a 15-percent contingency.
Strategic Plan Tie-In
GOAL TWO: Environmental Stewardship
Strategy 1—Achieve 100% compliance in all regulations
GOAL FOUR: Workforce Development
Strategy 4—Meet or exceed industry safety standards
GOAL FIVE:Infrastructure Reliability
Strategy 2—Execute long-term capital renewal and replacement program, Strategy 3—Protect personnel and assets
from threats and emergencies
GOAL SIX: Innovation and Optimization
Strategy 2—Improve and modernize operations through technology and efficiency measures
GOAL SEVEN:Agility and A daptability
July 15, 2021 Regular Board Meeting Agenda Packet- Page 51 of 118
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Strategy 2—Plan ahead for scenarios of direct adverse impacts
ATTACHMENTS:
1. Project Location Map
2. Summary of Bids
3. Post Bid/P reconstruction Estimate
July 15, 2021 Regular Board Meeting Agenda Packet- Page 52 of 118
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' and Treatment Plant Piping Renovations, 1
Phase 10 DP 7369
July 15, 2021 Regular Board Meeting Agenda Packet- Page 53 of 118
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ATTACHMENT 2
ELECTRIC BLOWER IMPROVEMENTS &
TREATMENT PLANT PIPING RENOVATIONS, PHASE 10
DISTRICT PROJECTS 100015 & 7369
SUMMARY OF BIDS
PROJECT NOS.: 100015 & 7369 NO. OF ADDENDA: 2 DATE/TIME: JULY 1, 2021/12:00 PM
PROJECT NAME: ELECTRIC BLOWER IMPROVEMENTS &
TREATMENT PLANT PIPING RENOVATIONS, PHASE 10
PROJECT MANAGER: NANCY MOLINA
PROJECT LOCATION: 5019 IMHOFF PLACE, MARTINEZ, CA
ENGINEER'S ESTIMATE: $14,000,000
NO. BIDDER BID PRICE
Auburn Constructors, LLC $9,594,300
Sacramento, California
2 C. Overaa & Co. $10,462,000
Richmond, California
3 Mountain Cascade, Inc. $10,979,047
Livermore, California
BIDS OPENED BY /s/Katie Young
DATE:JuIV 1 , 2021 at 12:30 p.m. via livestream due to COVID-19
July 15, 2021 Regular Board Meeting Agenda Packet- Page 54 of 118
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ATTACHMENT 3
ELECTRIC BLOWER IMPROVEMENTS &
TREATMENT PLANT PIPING RENOVATIONS, PHASE 10
DISTRICT PROJECTS 100015 &7369
POST-BID/PRECONSTRUCTION ESTIMATE
% of
Construction
No. Item Description Amounts Cost
1. CONSTRUCTION
a. Construction Contract $9,594,300
b.15% Contingency $1,440,700
c. APGN Equipment Pre-Purchase $3,500,000
d. Permits $10,000
SUBTOTAL- CONSTRUCTION COST $14,545,000 100%
2. CONSTRUCTION MANAGEMENT
a. District Forces (Capital Projects and Operations) $700,000
b. Consultants
- Carollo Engineers (CM Services) $800,000
- HDR (ESDC) $450,000
- Lee & Ro (ESDC) $300,000
SUBTOTAL- CONSTRUCTION MANAGEMENT $2,250,000 15%
3. PREBID EXPENDITURES
a. Engineering (Blower Project) $1,300,000
b. Engineering (Piping Project) $750,000
SUBTOTAL- PREBID EXPENDITURES $2,050,000 14%
4. TOTAL ESTIMATED PROJECT COST $18,845,000
July 15, 2021 Regular Board Meeting Agenda Packet- Page 55 of 118