EO-3742 WD-05-25 Addendum 3.pdf

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1800 E. Wardlow Road Long Beach, CA 90807

562.570.2300 │LBUtilities.org

October 5, 2026

ADDENDUM NO. 3

TO THE CONTRACT DOCUMENTS

Long Beach Public Utilities Department Long Beach, California Specifications No. WD-05-25 Drawing No. EO-3742

GROUNDWATER TREATMENT PLANT FILTER GALLERY VALVE REHABILITATION

PROJECT – PHASE 2

TO ALL PLAN HOLDERS

The following amendment is hereby made a part of the Contract Documents of the subject project as fully and completely as if the same were set forth therein. This Addendum No.

3 consists of pages AD3-1 to AD3-8.

PRE-BID CONFERENCE SCHEDULE

The prospective bidders were required to attend a pre-bid conference with LBUD at 11:00 AM September 22, 2026 at 2950 Redondo Ave, Long Beach. To request meeting info and RSVP email KIAN.NEJAD@lbwater.org and title email - "GWTP FG VALVE REHABILITATION PROJECT PHASE 2 (EO-3742): RSVP to Pre-Bid Meeting"

QUESTIONS SUBMISSION DEADLINE

The deadline for questions was 5:00 P.M. on Friday, September 25, 2026. All questions should be submitted via email to Kian Nejad at Kian.Nejad@lbwater.org with the subject “Spec. No. WD-05-25 Questions”.

BID SUBMISSION DEADLINE

The deadline for bids is 2:00 P.M. on Thursday, October 8, 2026. Bids will be accepted on behalf of the Board of Public Utilities Commissioners of the City of Long Beach via the City’s online procurement portal https://longbeachbuys.buyspeed.com/bso/ using keywords WD-05-26 and/or UD-26-358.

mailto:Kian.Nejad@lbwater.org https://longbeachbuys.buyspeed.com/bso/

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CONTRACT DOCUMENTS

The following clarifications, additions, and deletions are made to the Specifications and Construction Plans as stated below:

SPECIFICATIONS:

1. Section 01 10 01:

SUMMARY OF WORK AND SEQUENCE OF CONSTRUCTION

REPLACE WITH:

Replace Specification Section 01 10 01 Summary of Work and Sequence of Construction, in its entirety with the attached revised Specification Section, pages AD3-3 through AD3-8.

A signed copy of the Addenda Acknowledgement form provided in Part 1 of the Bidding Requirements and copy of Addenda must accompany the Bid Submittal

Questions regarding the project shall be directed to Kian Nejad at (562) 570-2319.

Sincerely, Danna Monzon, P.E.

Manager of Engineering

Att.

cc: Kian Nejad, Senior Civil Engineer Nikolas Baykal, Senior Civil Engineer

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SECTION 01 10 01

SUMMARY OF WORK AND SEQUENCE OF CONSTRUCTION

PART 1 - GENERAL

1.1 Work Covered by Contract Documents

A. Summary of Work, location, Work sequence, closeout, Contractor use of premises, and activities by others at Project site.

B. Work includes furnishing products, labor, tools, transportation, and services to:

1. Coordinate the disconnect of electrical conduits, strut and junction box with LBUD.

Contractor to perform disconnect.

2. Remove and dispose of existing butterfly valves, existing electric actuators, and associated steel piping per Valve Schedule on Sheet M-001 of construction plans.

3. Install new butterfly valves with electric actuators per Valve Schedule on Sheet M-001 of construction plans.

4. Furnish and install cement mortar lined and painted steel pipe spools.

5. Connections to the existing steel pipe.

6. Coordinate and reconnect electrical conduits, re-install strut and junction box with LBUD. Contractor to perform reconnect.

7. Coordinate the reconnection of new actuators to existing SCADA with LBUD.

Contractor to perform reconnect.

8. Repair cracks in filter basins as directed by LBUD with polyurethane crack injection method as shown per detail in construction plans.

9. All other work necessary to complete this project complete in place.

C. Furnish and install complete operating engineered systems, including appurtenant structural, mechanical and/or electrical mountings fittings or connections required for compliance with Manufacturer’s installation requirements, for compliance with applicable building, fire, plumbing, mechanical, electrical, and energy codes and standards, and as needed to permit systems to perform all functions required by Contract Documents and described in Manufacturer’s printed literature.

D. Contractor’s submission of bid shall constitute acknowledgment that, if awarded contract, they have relied upon and are relying upon their own examination of (a) the Work site, (b) access to Work site, (c) conditions under which Work is to be performed and (d) all other data and matters requisite to fulfillment of Work and on their knowledge of existing facilities on and near Work site.

1.2 Related Work

A. Section 01 22 00: Unit Prices B. Section 01 32 00: Construction Progress Documentation C. Section 01 35 26: Government Safety Requirements

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1.3 Project Location

A. Project address is as follows:

LBUD Groundwater Treatment Plant 2950 Redondo Boulevard Long Beach, California 90806.

B. All equipment shall be selected to operate at project site.

1. Derating and necessary oversizing to meet specified performance criteria shall be incorporated into equipment design.

2. Equipment shall be designed to prevent damage from high or low ambient temperature, freezing, airborne dust, wind, and wet weather conditions.

1.4 Normal Working Hours

A. Conduct Work within the following Owner-accepted schedule:

1. Normal Work Hours: 7:00 AM to 3:30 PM .

2. Normal Workdays: Monday through Friday, excepting legal holidays.

PART 2 - PRODUCTS (not used)

PART 3 - EXECUTION

3.1 Work Sequence

A. Stage 1 Preparation:

1. Before beginning Work, complete the following:

a. Pre-construction meeting.

b. Submit proposed schedule of Work.

c. Take preconstruction photographs.

2. Begin manufacturing and shipping materials and equipment after receiving accepted submittals.

3. Mobilize construction equipment.

4. Work shall be performed in phases based on the shutdown condition of various filter basins to allow the isolation of valves/actuators/piping for installation or replacement. The following is a conceptual sequence based on the shutdown scenarios; however, the Contractor shall coordinate with LBUD at the start of work and intermittently throughout the duration of the project to allow flexibility of sequencing should LBUD require the function of particular filters that were planned for shutdown.

B. Stage 2 - Shutdown No. 1 (Full Plant Shutdown):

1. Backwash Valves and Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for backwash valves (4-V-203, 4-V-403, 4-V-603, 4-V-803, and 4-V- 1003). Contractor to perform disconnect.

b. Remove each of the existing 36” butterfly valves, actuators, and associated steel piping.

c. Complete installation of 5 new 36” butterfly valves with actuator, steel piping, and appurtenances. Disinfect piping prior to connecting new piping to the existing piping.

d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

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2. Washwater Valves and Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for washwater valves (4-V-2 and 4-V-3). Contractor to perform disconnect.

b. Remove each of the existing 24” butterfly valves, actuators, and associated steel piping.

c. Complete installation of 2 new 24” butterfly valves with actuator, steel piping, 4” outlet on existing steel piping, and appurtenances. Disinfect piping prior to connecting new piping to the existing piping.

d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

C. Stage 3 - Shutdown No. 2 (South Side Shutdown):

1. Filter Effluent Throttling Valves and Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for filter effluent throttling valves (4-V-202, 4-V-402, 4-V-602, 4-V-802, and 4-V-1002). Contractor to perform disconnect.

b. Remove each of the existing 24” butterfly valves, actuators, and associated steel piping.

c. Complete installation of 5 new 24” butterfly valves with actuator, steel piping, and appurtenances. Disinfect piping prior to connecting new piping to the existing piping.

d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

2. Air Scour Valves and Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for air scour valves (4-V-206, 4-V-406, 4-V-606, 4-V-806, and 4-V-1006).

Contractor to perform disconnect.

b. Remove each of the existing 14” lug style butterfly valves, actuators, and associated steel piping.

c. Complete installation of 5 new 14” lug style butterfly valves with actuator, steel piping, and appurtenances. Disinfect piping prior to connecting new piping to the existing piping.

d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

3. Filter to Waste Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for filter to waste valves (4-V-207, 4-V-407, 4-V-607, 4-V-807, and 4-V- 1007). Contractor to perform disconnect.

b. Remove each of the existing actuators for the 12” butterfly valves.

c. Complete installation of 5 new actuators for the filter to waste valves and appurtenances.

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d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

D. Stage 4 - Shutdown No. 3 (Individual Filter Shutdown):

1. The Contractor shall coordinate the sequence of which filter basins may be individually shut down with LBUD. The sequence of the individual filter basins may vary depending on LBUD’s supply needs.

2. Provide BMPs for SWPP compliance

3. Waste Washwater Valves and Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for waste washwater valves (4-V-204, 4-V-404, 4-V-604, 4-V-804, and 4-V-1004). Contractor to perform disconnect.

b. Remove each of the existing 36” butterfly valves, actuators, and associated steel piping.

c. Complete installation of 5 new 36” butterfly valves with actuator, rehabilitate existing steel spool, and appurtenances. Disinfect piping prior to connecting new piping to the existing piping.

d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

4. Filter Inlet Valves and Actuators

a. Coordinate the disconnect of existing electrical conduits, strut and junction box with LBUD for filter inlet valves (4-V-201, 4-V-401, 4-V-601, 4-V-801, and 4-V- 1001). Contractor to perform disconnect.

b. Remove each of the existing 24” butterfly valves, actuators, and associated steel piping.

c. Complete installation of 5 new 24” butterfly valves with actuator, steel filter inlet energy dissipator, and appurtenances. Disinfect piping prior to connecting new piping to the existing piping.

d. Coordinate the reconnect of existing electrical conduits to new actuator and the reinstall of existing strut and junction box complete in place with LBUD.

Contractor to perform reconnect and reinstall.

e. Coordinate the reconnect of new actuators to existing SCADA with LBUD.

Contractor to perform the reconnect.

f. Demonstrate satisfactory installation and operation of installed work.

E. Stage 5 – Structural Improvements:

1. The structural improvement work does not require shutdown of the plant, valves, or system.

2. The Contractor shall coordinate the structural improvements with LBUD prior to start of work regarding access and schedule so as not to interfere with valve/actuator replacement work or work being performed by LBUD Treatment Plant.

3. Complete repair of cracks identified by LBUD on the filter basins per details in the plans.

4. Demonstrate satisfactory installation and operation of installed work.

F. Stage 6 – Closeout:

1. Remove construction equipment.

2. Clean up and restore construction areas.

3. Provide Record Drawings.

4. Provide warranty as specified

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3.2 Cooperation with Other Contractors

A. Owner may have additional work performed in this area by other Contractors. Contract requires cooperation with those contractors in the area.

1. Differences or conflicts which arise between Contractor and other contractors will be adjusted and determined by Owner.

2. Contractor shall conduct their operations to minimize interference with work being done by other contractors. Contractor shall promptly rectify injuries or damages to other contractors’ work caused at their hands, at their sole expense.

3.3 Contractor Use of Premises

A. The following facilities shall remain operational throughout construction of Work:

1. Water service.

2. Sewer service.

3. Do not shut off pipelines or power, or take action which might adversely affect Owner's use or operation of their facilities or premises without prior written authorization from Owner.

4. Construct accepted signs, barricades and lights necessary to ensure public safety and safety of Owner’s operators and personnel. Provide steel plates across ditches to facilitate safe access of Owner's personnel to facilities.

B. Contractor shall legally dispose of material removed.

C. Any improvements removed or disturbed by Contractor during construction shall promptly be replaced and/or repaired at Contractor's sole expense to Owner’s satisfaction.

3.4 Responsibility for Job Site Conditions

A. Contractor shall assume sole and complete responsibility for jobsite conditions during course of construction of Work, including safety and health of persons and property; that this requirement shall apply continuously and not be limited to normal working hours; and that Contractor shall defend, indemnify and hold Owner and design consultant harmless from any and all liability except that arising from sole negligence of Owner or design consultant.

B. Refer to Section 01 35 26 for jobsite safety requirements.

3.5 Occupancy

A. Successful completion of pre-startup checkout and functional testing shall precede Owner’s use or acceptance of completed Work.

END OF SECTION

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October 5, 2026