HomeMy WebLinkAboutEngineering & Operations MINUTES 03-06-24Page 2 of 28
LCENTRAL SAN
REGULAR MEETING OF THE
CENTRAL CONTRA COSTA
SANITARY DISTRICT
ENGINEERING & OPERATIONS
COMMITTEE
MINUTES
Wednesday, March 6, 2024
8:30 a.m.
Committee:
Chair Mike McGill
Member Florence Wedington
Staff.
Roger S. Bailey, General Manager
Joan Cox, Assistant District Counsel (left after Item 3.a.;
Katie Young, Secretary of the District
Greg Norby, Deputy General Manager — Operations
Philip Leiber, Deputy General Manager — Administration
Edgar Lopez, Capital Projects Division Manager
Nancy Molina, Senior Engineer
Sasha Mestetsky, Senior Engineer
Karen DeLong, Administrative Services Assistant
Stacey Durocher, Administrative Services Assistant
Call Meetina to Order
Chair McGill called the meeting to order at 8:30 a.m.
2. Public Comments
None.
BOARD OF DIRECTORS:
MARIAHN LAURITZEN
President
MICHAEL R. MCGILL
President Pro Tem
BARBARA D.HOCKETT
TAD J PILECKI
FLORENCE T WEDINGTON
PHONE: (925) 228-9500
FAX.- (925) 372-0192
www.centralsan.org
March 21, 2024 Regular Board Meeting Agenda Packet - Page 169 of 195
Page 3 of 28
Engineering & Operations Committee Minutes
March 6, 2024
Page 2
3. Items for Committee Recommendation to Board
a. Review draft Position Paper to authorize the General Manager to execute
a construction contract change order in the amount of $405,000 with
Auburn Construction, LLC to remobilize and complete construction of the
Electric Blower Improvements, District Project 100015 and Treatment
Plant Piping Renovations, Phase 10, District Project 7369; and authorize a
budget transfer in the amount of $895,000 from the Capital Improvement
Budget Contingency.
Mr. Lopez provided an overview of the presentation included in the
agenda materials. He stated that two projects were bid under one contract
and awarded in July 2021. He explained that all improvements for the
Electric Blower project are complete, and the system is operational.
Mr. Lopez stated there will be planned shutdowns of the steam blowers
during upcoming projects but one of the major drivers of this project was
managing power during Pacific Gas & Electric (PG&E) shutdowns. The
new blowers have a soft start and are easier to control and manage under
various conditions.
Member Wedington asked if the new blowers are designed to become the
primary over steam. Mr. Lopez stated they are designed to be primary
and eventually that is the goal but that is still five to ten years out before
we consider the switch to primary.
Mr. Norby discussed the significant changes coming in electrification. The
energy profile for the plant is changing and the new blowers are a large
part of that transition for the District. There are a few things that must be
balanced and will not be easy, especially when considering how to make
these changes while maximizing the life -cycle value of current assets and
maintaining the steam driven blowers.
Chair McGill asked for a more detailed presentation to include all the
pieces and how they fit together. Mr. Norby stated that an energy roadmap
is being developed to identify all the pieces and will be presented to the
Committee at a future meeting.
Member Wedington asked if Auburn Construction, LLC has worked with
the District before. Mr. Lopez said yes, and they have been great to work
with. Chair McGill expressed concern about the way the draft Position
Paper was written, and sounded like there was some friction. He
recommended that staff try to be as transparent as possible.
March 21, 2024 Regular Board Meeting Agenda Packet - Page 170 of 195
Page 4 of 28
Engineering & Operations Committee Minutes
March 6, 2024
Page 3
Mr. Bailey asked that more information be added to the draft Position
Paper regarding demobilization. He also asked staff to include the
remaining work value or percentage.
There was a discussion regarding the construction management
consultant, Carollo Engineers, and some concern whether they were also
overbudget on their contract. Mr. Lopez stated that Carollo Engineers is
providing construction management services to the District's Project
Manager, Nancy Molina and more information can be provided in the
Position Paper, however, no Board action for the contract is needed.
Mr. Norby stated that the Board often has questions about how the Capital
Improvement Budget contingency fund is being tracked and replenished.
Mr. Lopez stated that the Board does receive and track the contingency
account with the reports given at the Finance meeting. Staff can include
more information in the Position Papers or presentations going forward.
The Committee recommended the following changes.
Add more details about the added construction management cost
of $430,000 to show consultant and staff costs.
Add the total of the contingency fund and expenditures to date in
the presentation. (Post note; this was included in the draft Position
Paper)
Add information about any problems staff experienced on the
project in the Position Paper similar to the presentation.
COMMITTEE ACTION: Recommended Board approval with the
recommended changes mentioned above.
4. Other Items
a. Receive the mid -year update on Fiscal Year 2023-24 Capital Improvement
Budget
Mr. Lopez provided an overview of the presentation included in the
agenda materials.
Mr. Bailey expressed concern about setting the rates against the target,
and that the urgency to fix this cannot be overstated.
Mr. Leiber stated that the question will be whether the Board will approve
the four percent needed now, because if the need for those funds is going
to be delayed then there is no need to increase the rates now.
March 21, 2024 Regular Board Meeting Agenda Packet - Page 171 of 195
Page 5 of 28
Engineering & Operations Committee Minutes
March 6, 2024
Page 4
A discussion ensued regarding the carry forward and budget in the current
fiscal year and the projected spending. Mr. Norby noted that the budget
plus the carry -forward funds reflected an annual spending pace higher
than what could be realistically expected. The intent is to only request
what can be spent each year and leave unneeded funds in reserve. This
pattern of overbudgeting in the early years of large capital programs is
common. Staff has been working since last budget cycle to make
necessary adjustments to close the gap and plans to continue such efforts
this year. These matters will be discussed at the April 4, 2024, Board
Financial Workshop. The new projections will also be received and
reviewed by this Committee in May.
COMMITTEE ACTION: Receive the update.
b. Hold a discussion with the Committee regarding Change Order Log.
Quarterly Reports, and Bid Schedules to compare budgeted vs. actual
costs including project status, close-outs, and status of current service
agreements
Due to time constraints, this item was not heard.
COMMITTEE ACTION: The Committee requested that this item be
postponed until the April 3, 2024 meeting.
5. Announcements
None.
6. Suggestions for Future Agenda Items
a. Receive list of upcoming agenda items and provide suggestions for any
other future agenda items
• Member McGill requested future plant tours.
COMMITTEE ACTION: Received the list and provided input to staff.
7. Future Scheduled Meetings
Wednesday, April 3, 2024 at 8:30 a.m.
Wednesday, May 1, 2024 at 8:30 a.m. (at CSO) (Special)
Wednesday, May 8, 2024 at 8:30 a.m. (Budget Review)
8. Adjournment — at 10:38 a.m.
March 21, 2024 Regular Board Meeting Agenda Packet - Page 172 of 195
Page 6 of 28
Handout Item 3.a.
March 6, 2024
Electric Blower Improvements,
District Project (DP) 100015 and
Treatment Plant (TP) Piping
Renovations, Phase 10, DP 7369
Additional Budget and Change
Order Request
Engineering and Operations Committee Meeting
Edgar J. Lopez, P.E.
Capital Projects Division Manager
1
Two Projects Combined
1.Electric Blower Improvements:
Three New 1MW Magnetic Bearing
Electric Blowers and Electrical Panels
Three New Chillers
Three New Filter Houses
Canopy Covered Medium Voltage
Switchgear and Transformers
2
Attachment 1
i Fkl
March 21, 2024 Regular Board Meeting Agenda Packet - Page 173 of 195 1
Page 7 of 28
New Electric Blowers
3
New Blower System Improvements
4
March 21, 2024 Regular Board Meeting Agenda Packet - Page 174 of 195 2
Page 8 of 28
Second Project Background
4
2. TP Piping Renovations, Phase 10:
Replaced Scum Piping, Gates, and Electrical for
Both North and South Quad Clarifiers
Replaced Centrate Piping in the Solids
Conditioning Building
Replaced 3W HP and LP Piping
Replaced Hydropneumatic 1W Tank, Piping,
Compressor, and Electrical Panels
3WHP Pumps 1 and 2 Variable Frequency Drive
(VFD) Replacements
Boiler Chemical Piping Replacementk4
S.
Hypo Site 1 Improvements
Replace Primary Effluent VFD
5
_PpWEREX ._
1 �
Awarded Project Budget July 2021
General Contractor: Auburn Constructors, LLC (Auburn)
Construction Contracts:
Contingency:
Construction Costs:
Construction Management:
Prebid Expenditures (Design):
Total Estimated Project Budget:
I
$ 13,104,300
$ 1,440,700 (10.9%)
$ 14,545,000 (100%) A
$ 2,250,000 (15.5%) B
S 2,050,000 (14.1%) C
$ 18,845,000 (A+B+C)
March 21, 2024 Regular Board Meeting Agenda Packet - Page 175 of 195 3
Page 9 of 28
Contract Status Today
Construction Contracts: $13,104,000 ($800K remains)
Contingency Approved: $1,440,700 (98% allocated)
Change Orders:
Agreed Extra Work at Roughly $1,333,000 To Date
$450 nnn of Casts Being Revie we-d
Time Extensions, Auburn Demobilized on September 1, 2023
Current Plan to Finish
Auburn Demobilized after Blowers
Commissioned
Waiting for Electrical Gear to Arrive and
Schedule Work after April
Issue a Change Order to Remobilize and
Complete the Remaining Work
All Equipment Must Be Onsite Prior to
Moving Forward to Be More Efficient and
,
Cost Effective_
Major Work includes Hypo Site 1
Improvements and Primary Effluent VFD
' �,
Replacement
��-• '�
-
E:3
March 21, 2024 Regular Board Meeting Agenda Packet - Page 176 of 195 4
Page 10 of 28
0
Change Order Scope
Total Cost of $405,000 and Includes:
Mobilization and Demobilization Costs
Costs for Subcontractors, Such as Coatings
Costs of Labor and Installation Equipment
Insurance and Bonding Costs
Extended Time to Complete the Work within
90 Calendar Days
Weather Related Construction Constraints
Prevents Future Claims
I o]
March 21, 2024 Regular Board Meeting Agenda Packet - Page 177 of 195 5
Page 11 of 28
Overall Budget Request
Change Order: $ 405,000
Additional Construction Management: $ 430,000 **
Contingency to Close Out: 60,000
Total Budget Needed: $ 895,000
Original Completion Date: November 1, 2022
Estimated Completion Date: August 1, 2024 (20 mo.)
* Change order costs of $405K and $800K contract work remaining, total of $1.2 million.
** CM budget overspent by $230,000 to date due to extended construction time.
11
Reasons for Extended Time
Major Electrical Equipment
Procurement
i
Electric Blower Improvements �.
MV Switchgear oil
Busway r�
Selector Panel
TP Piping Renovations, Phase 10►
VFDs (3) 07
Motor Control Centers (3)
12
March 21, 2024 Regular Board Meeting Agenda Packet - Page 178 of 195 6
Page 12 of 28
Reasons for Extended Time CIO
and Project Costs
COVID
Supply Chain Issues.,,
Operational Constraints and
Coordination —�
Complex Project
Specialized Equipment
Temporary Equipment Used..
Change Orders for Additional Work
Longer Duration for Construction
Management Costs
13
Revised Project Budget
Construction Contracts:
Change Orders:
Contingency Close Out:
New Construction Costs
Construction Management:
Prebid Expenditures:
14
$ 13,104,000
$ 1,738,000 (13.3%)
$ 60,000
$ 14,902,000 (100%)
$ 2,686,000 (18.0%)
$ 2,050,000 (13.8%)
$ 19,638,000 (4.2% Overrun)
March 21, 2024 Regular Board Meeting Agenda Packet - Page 179 of 195
Page 13 of 28
Bid Results and Initial Cost Savings
PROJECT NOS.: 100015 & 7369 NO. CF ADDENDA: 2 DATEFFIME: JULY 1. 2021112.00 PM
PROJECT NAME: ELECTRIC BLOWER IMPROVEMENTS&
TREATMENT PLANT PIPING RENOVATIONS. PHASE 10
PROJECTMANAGER: NANCYMOLINA
PROJECT LOCATION: 5019 IMHOFF PLACE MARTINEZ, CA
ENGINEER'S ESTIMATE: $14,000000
NO.
BIDDER
BID PRICE
1
Aubum Constructors, LLC
S9,394,390
Sacramento, Califomia
2
C. Overaa & Co.
510,462.,000
Richmond, California
3
Mountain Cascade, Inc.
510,979.,D47
Livermore, Califomia
15
A
Recommended Board Actions
Staff recommends the following:
Authorize the General Manager to execute a construction
contract change order in the amount of $405,000 with Auburn
Constructors, LLC to remobilize and complete the Electric
Blower Improvements, District Project 100015 and Treatment
Plant Piping Renovations, Phase 10, District Project 7369; and
Authorize a budget transfer in the amount of $895,000 from
the Capital Improvement Budget Contingency to fund the
Project.
16
OA
March 21, 2024 Regular Board Meeting Agenda Packet - Page 180 of 195 8
Page 14 of 28
Questions?
17
March 21, 2024 Regular Board Meeting Agenda Packet - Page 181 of 195 9
Page 15 of 28
Handout Item 4.a.
Attachment 1
FY 2023-24 Capital Improvement Budget with Current
Expenditures as of 12/31/23 (November
Billings)
Totals:
$147,456,461
$34,820,420
24%
* Includes FY 2024 and carry forward from FY 2023
wed
Program
Approved
Actual
%Actual
Budget Spent
Expenditures*
Expenditures
to Date
Collection System (CS)
$67,604,000
$15,613,585
23%
Treatment Plant (TP)
$65,697,622
$14,789,229
23%
General Improvements
$7,596,181
$1,986,713
26%
Recycled Water
$6,558,658
$2,430,893
37%
March 21, 2024 Regular Board Meeting Agenda Packet -Page 182 of 195
Page 16 of 28
Collection System - Sewer Renovation and Pump Station
Projects
In Construction
Pleasant Hill, Phase 2 — 6,600 feet of sewers (75% complete)
Downtown Walnut Creek Locust —1,500 feet of sewers (40% complete)
Walnut Creek, Phase 16—11,000 feet of sewers (97% complete)
Martinez, Phase 7 — 6,200 feet of sewers (100% complete)
Martinez, Maltby, Fairview, San Ramon Pump Stations Replacement ongoing
Martinez Urgent Force Main (FM) Replacement — construction this spring
Urgent projects as needed
In Design
Bid projects from Collection System Sewer Renovation, Phase 2, include the
next phases of Orinda, Walnut Creek, Pleasant Hill, and Lafayette
Final design of abandonment of Buchanan Lift Stations
3
Pleasant Hill, Phase 2
4
March 21, 2024 Regular Board Meeting Agenda Packet - Page 183 of 195 2
Page 17 of 28
Downtown Walnut Creek Locust
�/23l2023 10.20
70/30/2023 "m .-
Walnut Creek, Phase 16
March 21, 2024 Regular Board Meeting Agenda Packet - Page 184 of 195 3
Page 18 of 28
7
Martinez Urgent FM Replacement
i � a
I
March 21, 2024 Regular Board Meeting Agenda Packet - Page 185 of 195 4
Page 19 of 28
Pump Station Upgrades
Phase 1 (Completed)
Moraga
Orinda Crossroads
Flush Kleen
Phase 2 (Ongoing)
San Ramon
Fairview
Maltby
Martinez
d
10
a
concore
9erkeley [�; ori�a.
- � 0aki—d
aamo� �
N
• ,re��,P��;�a��w��e�Fa � Pna 'o
Pumping Stations
March 21, 2024 Regular Board Meeting Agenda Packet - Page 186 of 195 5
Page 20 of 28
Pump Station Upgrades, Phase 2A - Fairview
11
2600 Marina Vista Ave .y
Martinez GA 94553
United States
12/1123, 10:26 AM
Pump Station Upgrades, Phase 2B - Martinez
12
March 21, 2024 Regular Board Meeting Agenda Packet - Page 187 of 195 6
Page 21 of 28
13
Other CS Projects and Items to Come
Protects in Process
Planning phase work for Large Diameter Pipeline Program
and update to the Collection System Master Plan
39-inch sewer crossing Grayson Creek being evaluated
Caltrans relocation of the A -line Sewer Interceptor
Cedar Lane Sewer Modifications Project in Orinda
Force main assessments
14
March 21, 2024 Regular Board Meeting Agenda Packet - Page 188 of 195 7
Page 22 of 28
Solids Handling Facility Improvements,
Phase 1A (Phase 1A) Construction
Contractor: C. Overaa & Company
Contract Price: $126,288,000 (4% paid as of November)
Total Estimated Project Budget: $199,964,000
l
Schedule: October 1, 2023 - October 2, 2027 (4% spent)
CDM/ArcSine Designers and MWH Construction Manager
Work Completed:
Mobilized, schedule, submittals, etc.
i
Site demolition for Seismic improvements ongoing. `
Utility re-routing ongoing. 1�
b„_ Electrical investigation and verification for submittals.
15
16
March 21, 2024 Regular Board Meeting Agenda Packet - Page 189 of 195 8
Page 23 of 28
Phase 1A Utility Re-routing
17
Phase 1A Basement Floor Demo for Wet Scrubber
a
I
March 21, 2024 Regular Board Meeting Agenda Packet - Page 190 of 195 9
Page 24 of 28
Other Related Activities Taking Place
Maior Ecluioment Procurement
Updated major equipment contracts executed.
Change orders have been executed to incorporate updates
made since bidding through the start of construction.
Mechanical components have been released for fabrication
with vendors. Control shop drawings being coordinated
and finalized.
Staffing uo with internal and outside resources
19
Electric Blowers Improvements
Filter Door Modification
20
Blower 4 Commissioning —..dm
March 21, 2024 Regular Board Meeting Agenda Packet - Page 191 of 195 10
Page 25 of 28
Piping Renovations Phase 10
21
Hypo Site 1 and PE Pump
VFD Replacement
Filter Plant and Clearwell Improvements, Phase 1A
Substation & Electrical Bldg. — Busway Issues
22
Tracer Testing
March 21, 2024 Regular Board Meeting Agenda Packet - Page 192 of 195 11
Page 26 of 28
23
RAS Piping Renovations
Bypass Piping
I� d2 O �A
24
March 21, 2024 Regular Board Meeting Agenda Packet - Page 193 of 195 12
Page 27 of 28
Aeration Basin Diffusers Replacement, Phase 1
• C. Overaa & Company (Filter Plant, Pump Stations, Solids)
• Construction Contract $12,662,000
• Total Estimated Project Budget $20,879,000
• HDR - Design Engineer (Electric Blowers, RAS Piping)
• Construction over summers 2024 (Tank 1A/1B) and 2025 (1C/1D)
• Scope
Seismic & Structural work including baffles
Floor slab/plenum demolition
Aeration Diffuser installation
• Sub 32 Electrical Work
25
Aeration Basin Diffusers Replacement, Phase 1
26
March 21, 2024 Regular Board Meeting Agenda Packet - Page 194 of 195 13
Page 28 of 28
Wet Weather Improvements
Wet Weather Improvements
27
QUESTIONS?
28
Basin levee Raise
March 21, 2024 Regular Board Meeting Agenda Packet - Page 195 of 195 14