HomeMy WebLinkAbout22. Receive update and consider terminating emergency situation re urgent repairs to Aeration Blower No. 2 Page 1 of 5
Item 22.
CENTRAL SAN BOARD OF DIRECTORS
POSITION PAPER
MEETING DATE: OCTOBER 20, 2022
SUBJECT: RECEIVE UPDATE AND TERMINATE THE EMERGENCY SITUATION
DECLARED ON AUGUST 4, 2022, AUTHORIZING URGENT REPAIRS TO
STEAM DRIVEN AERATION BLOWER NO. 2, IN ACCORDANCE WITH
PUBLIC CONTRACT CODE SECTION 22050
SUBMITTED BY: INITIATING DEPARTMENT:
STEVE MCDONALD, DIRECTOR OF OPERATIONS-MAINTENANCE
OPERATIONS
Roger S. Bailey
General Manager
ISSUE
On August 4, 2022, the Board of Directors (Board) authorized to declare an emergency and ratify the
General Manager's actions under Public Contract Code Section 22050 to perform emergency repairs to
the Steam Driven Aeration Blower No. 2; and authorized an increase to an existing contract in an amount
not to exceed $412,600 with Conhagen Rotating Equipment Specialists (Conhagen), increasing the
contract cost ceiling up to $550,000, to perform the required repairs.
BACKGROUND
The contractor, Conhagen, completed the necessary repairs which included custom fabrication of a
number of turbine components that are no longer commercially available. Fabrication was followed by
installation and then start-up testing services. Installation started on September 7, 2022 and repairs were
completed on September 14, 2022.
Staff has received final billing which totals $532,000 and the continuation of this item will not be needed.
ALTERNATIVES/CONSIDERATIONS
No feasible alternatives.
October 20, 2022 Regular Board Meeting Agenda Packet- Page 139 of 143
Page 2 of 5
FINANCIAL IMPACTS
The total cost for this repair was $532,000 which includes all engineering, fabrication, installation, and start-
up and testing.
COMMITTEE RECOMMENDATION
This matter was not reviewed by a Board Committee.
RECOMMENDED BOARD ACTION
Staff recommends the Board receive the update and terminate the emergency situation proclaimed on
August 4, 2022 in accordance with Public Contract Code Section 22050.
Strategic Plan re-In
GOAL TWO: Environmental Stewardship
Strategy 1 -Achieve compliance in all regulations
GOAL FIVE: Safety and Security
Strategy 2- Protect personnel and assets from threats and emergencies
GOAL SIX: Infrastructure Reliability
Strategy 1 - Manage assets optimally
ATTACHMENTS:
1. Presentation
October 20, 2022 Regular Board Meeting Agenda Packet- Page 140 of 143
Page 3 of 5
October 20,2022
Aeration Turbine # 2 '"
Repair
Emergency Declaration Update ■
Neil Meyer
Plant Maintenance Division Manager
Aeration Background
pier
Two steam turbine driven aeration units
providing 30,000—60,000 standard
cubic feet per minute for the secondary j ! ,�. a
process
One electric motor driven 2,000-
horsepower blower backup .rr=
Capital Projects currently installing
replacement electric blowers
October 20, 2022 Regular Board Meeting Agenda Packet- Page 141 of 143 1
Page 4 of 5
Turbine Repairs »
July 11— Began Turbine#2 Repairs
r
Replaced carbon seal case to stop steam
leaks
Used spare rotor (if needed)
Investigated water in lubrication system
Emergency Declaration
July 25— Discovered nozzle block . -
damage
September 7—Started installation of
steam turbine
September 14— Ran aeration process
&Nib
October 20, 2022 Regular Board Meeting Agenda Packet- Page 142 of 143 2
Page 5 of 5
Next Steps
Rebuild Aeration Turbine #1 in 2023
Repair and balance spare rotor
Work with Capital Projects for timing
Recommendation
Terminate the emergency situation declared on August 4, 2022
.1
October 20, 2022 Regular Board Meeting Agenda Packet- Page 143 of 143 3