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CENTRAL SAN
CENTRAL CONTRA COSTA SANITARY DISTRICT 5019 IMHOFF PLACE, MARTINEZ, CA 9A553-A392
SPECIAL MEETING OF THE BOARD OF TADJPI ECK
TAD J PILECKI
CENTRAL CONTRA COSTA President
VID R.SANITARY DISTRICT °A Prresidesid wILLIAem
ent Pro Tem
ENGINEERING & OPERATIONS BARBARA D.HOCKETT
COMMITTEE MARIAH N.LAURITZEN
MICHAEL R.MCGILL
MINUTES PHONE: (925)228-9500
FAX.- (925)372-0192
Tuesday, August 10, 2021 www.centralsan.org
11:00 a.m.
(All attendees participated via videoconference)
Committee:
Chair David Williams
Member Mariah Lauritzen
Staff.
Roger S. Bailey, General Manager (joined during Item 4.a., left during Item 4.b.)
Katie Young, Secretary of the District
Philip Leiber, Director of Finance and Administration (joined during Item 4.a.)
Steve McDonald, Director of Operations
Jean-Marc Petit, Director of Engineering and Technical Services
Edgar Lopez, Capital Projects Division Manager
Dan Frost, Senior Engineer (left after Item 4.a.)
Sasha Mestetsky, Senior Engineer
Amanda Cauble, Associate Engineer (left after Item 4.a.)
Amelia Berumen, Assistant to the Secretary of the District
1. Notice
This meeting was held in accordance with the Brown Act as in effect under the
State Emergency Services Act, the Governor's Emergency Declaration related
to COVID-19, and the Governor's Executive Order N-29-20 that allowed
attendance by Board Members, District staff, and the public to participate and
conduct the meeting by teleconference, videoconference, or both. The agenda
included instructions for options in which the public could participate in the
meeting.
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2. Call Meeting to Order
Chair Williams called the meeting to order at 11:00 a.m.
3. Public Comments
No public comments.
4. Items for Committee Recommendation to Board
a. Review draft Position Paper to authorize the General Manager to execute
a construction contract change order in an amount not to exceed
$300,000 with McGuire and Hester Construction, Inc. to include the
Tertiary Membrane Pilot Installation under the Contractor Staging
Improvements, District Project 7375
Mr. Petit stated that staff has been working towards a tertiary pilot project
to test whether tertiary membrane filtration would provide better
performance than the current gravity/sand filters. Currently, there are four
gravity/sand filters in place rated up to 3 million gallons per day that have
not performed well. These filters require a lot of coagulant aid, Alum, and
a considerable amount of backwash maintenance.
The District currently has Phase 1 of the Filter Plant Improvements Project
in construction. With Phase 1, it was decided to only replace one of the
four filters with the concept of doing a parallel comparison with the tertiary
membrane pilot project to compare performance and operating cost. Staff
reviewed many different filtration options, including submerged and
pressure membranes. After preparing a white paper on tertiary membrane
filtration for Central San, the pressure membranes configuration seemed
to be the most cost-effective approach. Carollo Engineers helped with the
pilot design and owns a pilot skid that they will lease to Central San to test
three different manufacturers.
In review of the schematic shown on slide 3, Mr. Petit responded to
various questions posed by the Committee. He explained the noticeable
PVC (polyvinyl chloride) diameter size differences is due to a standard
cartridge versus those that are vendor specific. It was further clarified that
the pilot project will test three manufacturer membranes and a reverse
osmosis (RO) unit, which the RO is not shown on the schematic.
A discussion ensued over the filtration unit testing, use of secondary flow
for treatment, microfiltration and ultrafiltration membrane testing,
transmembrane pressure, backwash frequency, and water quality required
for Title 22 permitting and RO system requirements. Mr. Petit concluded
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the pilot is a large effort and valuable, simultaneous research data will be
collected as part of this endeavor.
As such, with this size of a pilot project, it will require a contractor to
install. McGuire & Hester(M&H) is already on site and performing the
same scope of work with concrete, civil improvements, and utilities that
would also be needed for the pilot installation. Mr. Petit noted with the
lease of equipment, installation, and other associated costs, the total pilot
project is estimated at $750,000 and is fully funded via the Applied
Research and Innovations capital project.
In regard to the sole change order proposal from M&H questioned by
Chair Williams, Mr. Lopez explained that the installation was originally
thought to be within the threshold of a UPCCAAI project. However, as the
pilot will be installed just north of the laboratory and an area known for
contaminated and potentially hazardous soils, it was quickly learned that it
would be more costly for those contractors to complete the work. Thus, it
would exceed the limit associated with that contracting mechanism. Staff
approached contractors currently working on site and with known
experience. M&H was the only contractor to propose; all others declined.
Moreover, M&H has the proper hazardous soil certifications and training
needed to complete the work..
Mr. Lopez explained he recently spoke at length with District Counsel
regarding this change order. He will update the final Position Paper to
better clarify that the installation scope M&H would perform is similar to
scope of work already being performed and not outside that which was
previously awarded.
COMMITTEE ACTION: Recommended Board approval.
b. Review draft Position Paper to authorize the General Manager to amend
two professional engineering services agreements to increase each in the
amount of$500,000, with: 1) MWH Constructors, Inc. (MWH), increasing
the cost ceiling to $2.6 million, and 2) Carollo Engineers, Inc. (Carollo),
increasing the cost ceiling to $1.3 million, to continue as-needed
construction management services for District projects
Mr. Lopez stated these two agreement amendments are derived from the
Request for Proposal (RFP) process recently reviewed at the July 13
Committee meeting. Board approval was recommended to authorize
Carollo with a professional services agreement for these services at that
meeting. This request is to amend two existing agreements to include as-
needed construction management scope and cost for other facility projects
Uniform Public Construction Cost Accounting Act
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as part of that RFP process. It was explained that MWH already has an
existing professional services agreement for similar work, thus, an
amendment versus a new agreement is recommended.
It was clarified that the additional as-needed construction management
services are to supplement District resident engineering and inspections
for facility projects, as there are many projects in construction and moving
forward that assistance is needed for District construction managers. The
goal was to utilize existing services already on site to effectively manage
time and specialty scope readily available, especially electrical assistance.
Chair Williams noted a discrepancy in the proposed MWH cost ceiling
amendment and requested staff to further examine. Mr. Lopez stated he
would review and update the Position Paper accordingly.
COMMITTEE ACTION: Recommended Board approval.
c Review draft Position Paper to award a construction contract in the
amount of$2,838,000 to K.J. Woods Construction, Inc., the lowest
responsive and responsible bidder for the North Orinda Sewer
Renovations, Phase 8, District Project 8463; find that the project is exempt
from the California Environmental Quality Act; and authorize up to a 15-
percent contingency
Mr. Lopez stated that pipeline projects throughout the Bay Area have
slowed down and staff has received great bids from well-established
contractors on this project. Although materials and labor have gone up,
the overall pipeline project prices remain lower than the prior year. As
such, staff lowered the project's estimate to prior year rates and still
received bids much less than estimated, with the low bidder nearly one
million under the engineer's estimate.
The low bidder acknowledged a minor bid discrepancy in which one wet
signature was not included, however, the bidder typed in the name
electronically. The contractor provided a signed form without delay and
staff considers the discrepancy as non-material.
Mr. Lopez stated the overall project savings would be returned to the
Contingency account. To clarify a question posed by Chair Williams,
Mr. Lopez said that during the year, project savings are transferred to the
Contingency account, at the end of the year, whatever balance remains is
placed back into the Sewer Construction fund.
COMMITTEE ACTION: Recommended Board approval.
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5. Other Items
a. Receive Capital Projects Division Quarterly Report (April to June) on
capital projects, active consultant contracts, change order log, and
schedule of bids and awards
COMMITTEE ACTION: Received the report.
6. Announcements
None.
7. Suggestions for Future Agenda Items
a. Receive list of upcoming agenda items and provide suggestions for any
other future agenda items
COMMITTEE ACTION: Received the list.
8. Future Scheduled Meetings
Tuesday, August 17, 2021 at 11:00 a.m.
Tuesday, September 21, 2021 at 11:00 a.m.
Tuesday, October 12, 2021 at 11:00 a.m.
9. Adjournment— at 11:44 a.m.
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