Power Generation Station Engine Generators and Auxiliary Equipment Assessment

Agency: East Bay Municipal Utility District
State: California
Type of Government: State & Local
NAICS Category:
  • 238210 - Electrical Contractors and Other Wiring Installation Contractors
  • 333618 - Other Engine Equipment Manufacturing
  • 335312 - Motor and Generator Manufacturing
  • 541330 - Engineering Services
  • 811310 - Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
Posted Date: Sep 6, 2019
Due Date: Oct 3, 2019
Bid Source: Please Login to View Page
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EBMUD is soliciting proposals for well-qualified services contractors to provide Power Generation Station engine generators and auxiliary equipment assessment.

Please respond to this RFP no later than 4:00 p.m. on Thursday, October 3, 2019. Please include one (1) original hard copy with original ink signatures along with three (3) copies and one (1) electronic copy preferably in PDF format on CD or flash drive of your proposal (please include proposer's name, return address, and RFP title on mailing package). RFP should be mailed or delivered to:

Mail: Hand Delivered/Fed Ex:

EBMUD
ATTN: Kelley K. Smith, Manager of Purchasing
RE: RFP - Power Generation Station – Engine Generators and Auxiliary Equipment Assessment

Purchasing Division
P.O. Box 24055, MS 102
Oakland, CA 94623-1055
(Postmarks will not be accepted)

EBMUD
ATTN: Kelley K. Smith, Manager of Purchasing
RE: RFP - Power Generation Station – Engine Generators and Auxiliary Equipment Assessment

Purchasing Division
375 Eleventh Street, First Floor
Oakland, CA 94607-4240

Questions

If you have questions regarding this RFP, please send an email to Brian Dunstan, Associate Civil Engineer at brian.dunstan@ebmud.com . Questions must be received no later than 1:00 p.m. on Monday, September 30, 2019.

Document Type Size
PGS Engine Generators and Auxiliary Equipment Assessment RFP PDF 4.3 MB

Attachment Preview

EAST BAY MUNICIPAL UTILITY DISTRICT
REQUEST FOR PROPOSAL (RFP)
for
Power Generation Station –
Engine Generators and Auxiliary Equipment
Assessment
Contact Person:
Phone Number:
E-mail Address:
Brian Dunstan, Associate Civil Engineer
(510) 287-7037
Brian.Dunstan@ebmud.com
For complete information regarding this project, see RFP posted at
https://www.ebmud.com/business-center/requests-proposal-rfps/ or contact the District
representative listed above. Please note that prospective bidders are responsible for
reviewing this site during the RFP process, for any published addenda regarding this RFP.
RESPONSE DUE by
4:00 p.m.
on
October 3, 2019
at
EBMUD, Purchasing Division
375 Eleventh St., First Floor
Oakland, CA 94607
375 Eleventh Street, Oakland, CA 94607
Website: ebmud.com
Note: EBMUD is committed to reducing environmental impacts across our entire supply chain. If printing this document, please
print only what you need, print double-sided, and use recycled-content paper.
EAST BAY MUNICIPAL UTILITY DISTRICT
RFP for
Power Generation Station – Engine Generators and Auxiliary Equipment Assessment
TABLE OF CONTENTS
I. STATEMENT OF WORK ........................................................................................................... 3
A. OVERVIEW ........................................................................................................................... 3
B. PROJECT BACKGROUND ...................................................................................................... 3
C. PROPOSER QUALIFICATIONS ............................................................................................... 6
D. SCOPE OF WORK.................................................................................................................. 7
E. PROJECT DOCUMENTATION.............................................................................................. 12
F. PROJECT BUDGET .............................................................................................................. 12
II. CALENDAR OF EVENTS ......................................................................................................... 12
III. DISTRICT PROCEDURES, TERMS, AND CONDITIONS .............................................................. 12
A. RFP ACCEPTANCE AND AWARD......................................................................................... 12
B. EVALUATION CRITERIA/SELECTION COMMITTEE ............................................................. 13
C. PRICING.............................................................................................................................. 14
D. NOTICE OF INTENT TO AWARD AND PROTESTS................................................................ 15
E. INVOICING ......................................................................................................................... 16
IV. RFP RESPONSE SUBMITTAL INSTRUCTIONS AND INFORMATION .......................................... 16
A. DISTRICT CONTACTS .......................................................................................................... 16
B. SUBMITTAL OF RFP RESPONSE.......................................................................................... 17
C. RESPONSE FORMAT........................................................................................................... 19
ATTACHMENTS
EXHIBIT A - RFP RESPONSE PACKET
EXHIBIT B - INSURANCE REQUIREMENTS
EXHIBIT C - STANDARD CONSULTANT AGREEMENT FOR EAST BAY MUNICIPAL UTILITY DISTRICT
EXHIBIT D - SCHEMATICS & DRAWINGS
EXHIBIT E - OPERATING DATA
EXHIBIT F - PGS ASSETS – CURRENT PREVENTIVE MAINTENANCE FREQUENCIES BY WORK
GROUP
EXHIBIT G - EXAMPLE INSURANCE CERTIFICATES
9/19
Power Generation Station – Engine Generators and Auxiliary Equipment Assessment
I. STATEMENT OF WORK
A. OVERVIEW
East Bay Municipal Utility District (District) is a publicly-owned utility formed under
the Municipal Utility District Act (MUD Act) passed by the California Legislature in
1921. The MUD Act permits the formation of multipurpose government agencies to
provide public services on a regional basis. In accordance with the MUD Act’s
provisions, voters in the East San Francisco Bay Area created the District in 1923 to
provide water service.
In 1944, voters decided to create the District’s Special District No. 1 to treat
wastewater for six East Bay cities. Wastewater treatment began in 1951.
The District has a seven-member Board of Directors, publicly elected from wards
within the District’s service area. The Board and staff are committed to preserving the
region’s resources and setting industry standards for the way water and wastewater
utilities conduct themselves. The District is a customer-oriented and environmentally-
sensitive public agency.
The wastewater system serves approximately 680,000 people in an 88-square mile
area. The District provides wastewater services for the cities of Alameda, Albany,
Berkeley, Emeryville, Oakland, and Piedmont, and the Stege Sanitary District, which
includes El Cerrito, Kensington and part of Richmond. The District’s wastewater
system includes approximately 29 miles of sewer interceptors, seven miles of sewer
force mains, 15 pumping stations, three wet weather facilities, and the Main
Wastewater Treatment Plant (MWWTP).
B. PROJECT BACKGROUND
The Power Generation Station (PGS) is located at the MWWTP and includes PGS-1,
the original three engine generators and auxiliary equipment, installed in 1986; and
PGS-2, the turbine, installed in 2011. Refer to Figure 1 for an overview.
PGS-1 includes three dual-fuel (diesel/digester gas) engine generators (Enterprise,
model DGSR-46), with three digester gas compressors (Ingersoll Rand PHE
Compressors). Upon commissioning, PGS-1 provided nearly 50% of the power needed
to run the MWWTP.
PGS-2 was added in 2011 to accommodate increased gas production due to the
acceptance of high strength wastes under the Resource Recovery Program.
Improvements included a biogas turbine (Solar Mercury 50), gas compressor, digester
gas conditioning system, hot water heat recovery system, cooling water system,
9/19
Page 3
Power Generation Station – Engine Generators and Auxiliary Equipment Assessment
electrical and supervisory control and data acquisition (SCADA) upgrades, and a new
control building.
A diagram of the gas flow is presented in Exhibit D. Gas typically flows from the
digesters (including Digester 2 with the Dystor cover) to the digester gas conditioning
system (DGCS), and then to the engines and turbine. The low pressure gas holder
(LPGH) tank acts as a wide spot in the piping between the DGCS and the turbine and
engines. During typical automatic operation, the DGCS blower maintains a constant
level in the LPGH tank. This provides a uniform header pressure (approximately 6
inches of water column [“WC]) upstream of the compressors for both the engines and
turbine. The header pressure is boosted to 60-70 pounds per square inch (psi) for the
engines and to 250 psi for the turbine. If gas production exceeds available capacity of
the engines (~600 standard cubic feet per minute [scfm]/engine) and turbine (~1,200
scfm) then the balance of the gas is flared. There are four flares (900 scfm/flare)
connected to the gas header upstream of the DGCS. Digester gas can also be used in a
700 scfm boiler to provide heating for digesters.
PGS-1
Three Engines
Digester Gas
Storage
(Dystor)
Gas
Conditioning
System
PGS-2
Turbine
Low
Pressure
Gas Holder
Gas Flares
Figure 1: Existing PGS Layout
9/19
Page 4
Power Generation Station – Engine Generators and Auxiliary Equipment Assessment
Current electrical generation capacity is 10.9 megawatt (MW) (gross), allowing the
MWWTP to be energy “self-sufficient” and export energy generated onsite.
Typically the turbine and two engines are operated together, with the remaining
biogas flared when either there is not enough gas or the third engine is unavailable.
Biogas flow is variable but ranges from 1,200 to 5,200 scfm, with an average 2,250
scfm. Currently, roughly 83% of the biogas is utilized. The goal is to maximize
electrical generation and minimize flaring of biogas.
Full electrical generation has not been possible due to a variety of reasons, but mostly
related to reliability issues associated with the engines and auxiliary equipment.
Though the District maintains this facility and its equipment through an intensive
maintenance program including in-house maintenance, contracted services, and
capital improvements, there still has been significant down time with the engines.
The District currently has no plans to move away from onsite energy generation; so, it
is critical that this facility continues to be maintained and operated in a reliable and
efficient manner.
Current and Planned Capital Improvement Projects
1. Engine Rebuilds – Currently, the three engines and generators are being rebuilt.
The District typically rebuilds the engines every five to ten years. The rebuild for
Engine 2 is expected to be complete in September 2019, and the rebuilds for
Engines 1 and 3 are expected to be complete in early 2020.
2. PGS Reliability Phase 3 – Improvements are focused on the engines and auxiliary
equipment and include a cooling tower to replace the existing radiator, a
redundant DGCS gas blower, new heat exchangers, engine injector and pressure
monitoring upgrades, and replacement of corroded piping. Design is expected to
be complete by the end of 2020, and construction will take place in 2021-22.
3. Digester Upgrades Phase 3 – Scope includes installing dual-membrane gas
holders on two additional digesters (total of three digesters will have gas holders
when the project is complete) and pumped mixing systems for the three second
stage digesters. At the end of this project, the District intends to increase the gas
system working pressure from 6-7”WC to 9-10”WC. Design is complete, and
construction is anticipated to take place from late 2019 to early 2021. After
construction is complete, all digester roofs will be fixed or will have a dual
membrane, so the operating pressure will be raised from the current 6.7”WC,
flares-on, to 9-10”WC, flares-on.
9/19
Page 5

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