AECOM
5001 E. Commercenter Dr., Suite 100
Bakersfield, CA 93309
July 29th , 2026
Fernando Montes, PE
City of Bakersfield
Water Department – Wastewater Division
Subject: 100% Design and Engineering Support during Bidding and Construction of the McCutchen Sewer Lift Station Rehabilitation
Dear Fernando,
AECOM Technical Services, Inc. (AECOM) is pleased to submit this scope of work, fee proposal, and schedule to the City of Bakersfield (City) to rehabilitate the existing sewer lift station located near the intersection of McCutchen Road and Gosford Road.
PROJECT UNDERSTANDING
The City desires to rehabilitate the existing sewer lift station to address existing operational and maintenance issues and increase capacity to accommodate future demand. The AECOM 2026 Feasibility Study (Study) will serve as the basis for advancing the recommended improvements into final design and construction.
Major improvements under consideration include:
Replacement of the five (5) existing lift station pumps with high-efficiency units incorporating current operational and monitoring features. Replacement of the existing odor control system and standby generator. Update electrical and SCADA systems within the electrical room to meet current industry standards and improve system reliability and control.
Replacement of pump room ancillary equipment, including check valves, isolation valves, effluent flow meter, and the bridge crane electric hoist.
In addition to these capacity and reliability improvements, the City seeks to address several operational and maintenance challenges identified in the Study. The existing wet well experiences significant ragging and solids accumulation, requiring routine cleaning and hauling of debris from the 40-foot-deep structure. The Study recommends removing the existing 3-inch manual bar screen and failed motorized sluice gate and installing a modular grinder and mixing pump system to macerate solids and maintain them in suspension, thereby reducing settling within the wet well and improving conveyance through the lift station.
The individual pump intakes are routinely clogged by debris settling whenever the pumps cycle off during normal operation. This condition requires daily cleaning and disassembly of the pump intake manifold and has accelerated wear of the isolation valve and check valve sealing surfaces. To mitigate these issues, the Study recommends installation of a backflush system utilizing treated effluent from Plant 3 to automatically clear settled debris from the pump intakes during pump idle periods.
The Study also recommended several additional facility safety improvements. These improvements include replacing the existing pump room lighting system, which was damaged during previous flooding events, with new LED fixtures. In addition, the Study recommended installing new wet well access hatches with features that comply with current safety standards, including perimeter guardrails with self-closing gates, lockable access hatches, and safety grating systems to enhance worker safety and site security.
Project will not include street improvements, landscaping, site security or changes to the existing building architecture, HVAC, ventilation system, stairways, platforms, site grading, and overflow basin.
AECOM
2 SCOPE OF WORK
TASK 1 – 30% DESIGN PACKAGE
1. Project Kickoff Meeting and Site Visit
During the Kickoff Meeting, AECOM will confirm all aspects of the work to be done and document in the meeting minutes. The minutes will serve as the basis for the work. .
A site visit will be held after the AECOM team has reviewed the As-builts and other requested records. AECOM’s civil/process, electrical, instrumentation, structural task leads will be present.
2. 30% Basis of Design and Equipment Selection Memo
This draft memo will serve as the basis of design and equipment selection. After City reviews and returns comments on the memo, AECOM will host a workshop to receive City’s direction on the recommendations prior to final design. The memo will be finalized at the 60% design stage.
Topics of design include:
Confirmation of design flow rates
Temporary bypass pumping approach required during construction Hydraulic assessment of the lift station and related facilities Evaluation and selection of replacement lift station pumps Mixing pump and modular grinder system design.
Backflush system design for lift station pumps.
Bio-trickling filter odor control system design
Standby generator replacement design
3. Workshop
After City reviews the memo, AECOM will host a workshop to receive City’s comments on the listed recommendations prior to detail design.
4. 30% Design Drawings
AECOM will prepare a preliminary 30% design drawing package illustrating the recommended improvements and establishing the basis for subsequent design development. The drawing package will include preliminary layouts, process flow diagrams, equipment arrangements, piping routing concepts.
The 30% package will be developed by the Civil/Process discipline and is anticipated to consist of approximately 25 sheets, including:
Cover Sheet and Drawing Index
Overall Site Plan, Staging Area, and Survey Control Plan Process Flow Diagrams
Piping Plans & Sections
Equipment Layouts and Elevations
Demolition Site Plans & Details
Temporary Bypass Pumping Layout and Routing
5. Quality Control / Quality Assurance
AECOM will implement its ISO-certified Quality Management System procedures throughout the project. As part of the quality assurance process, project deliverables will undergo independent technical review by qualified engineers who are not directly involved in the project but possess relevant experience in the planning, design, and analysis of wastewater collection, pumping, and treatment facilities. Comments generated through the review process will be addressed prior to submittal to the City.
AECOM
3 Deliverables
AECOM will provide the following deliverables under this task:
30% Design and Equipment Selection Memorandum
30% Design Drawing Package (PDF format)
TASK 2 – 70% DESIGN PACKAGE
AECOM will advance the approved 30% Design Package and incorporate City comments into a more detailed 70% Design Package suitable for review of project configuration, major design elements, equipment arrangements, structural modifications, operational controls, and technical specifications.
1. Comment Review Meeting
AECOM will conduct a review meeting with City staff to discuss comments received on the 30% Design Package and Equipment Selection Memorandum. The purpose of the meeting will be to confirm the City's preferred alternatives, discuss remaining design considerations, and establish directions for advancement of the project.
2. Incorporate City’s Comments & Finalize Basis of Design AECOM will review and incorporate City comments and decisions into the 60% design documents and finalize the Basis of Design.
3. Preliminary Technical Specifications
AECOM will prepare preliminary technical specifications for major project components including civil/process, structural improvements. Specifications will define equipment requirements, materials, installation requirements, testing procedures, and performance criteria. EI&C specifications will also be prepared to address proposed electrical systems, standby power facilities, instrumentation, communications, and control system improvements.
4. Preliminary Opinion of Probable Construction Cost
An Opinion of Probable Construction Cost (OPCC) will be prepared based on the 70% design package to assist the City with project budgeting and funding considerations.
5. Control Narrative / Sequence of Operations
AECOM will prepare a Control Narrative and Sequence of Operations to describe the intended operation of the lift station improvements, including:
Lift station pumps
Grinder & Mixing Pump system
Backflush system
Odor control facilities
Standby generator integration
SCADA monitoring and operator control requirements
6. 70% Design Drawings
The 70% design will be developed by the Civil/Process, EI&C, and Structural disciplines and is expected to also refine drawings developed in the preliminary design. This package will be approximately 60 sheets, which includes:
Piping & Tie-In Sections and Details
Equipment Elevations and Tie-in Details
Equipment Installation & Mounting Details
Foundation Details
Electrical Site Plans and One-Line Diagrams
AECOM
4 Power and Controls Plans
Lighting Plans
SCADA and Network Architecture Diagrams
Process and Instrumentation Diagrams (P&IDs)
7. Quality Assurance / Quality Control
AECOM will implement its ISO-certified Quality Management System and conduct an internal multidisciplinary Quality Assurance/Quality Control (QA/QC) review of the 60% Design Package. The review will be performed by qualified engineers independent of the project team who possess experience in wastewater collection, pumping, treatment, electrical, structural, and controls system design. Review comments will be incorporated prior to submittal to the City.
Deliverables
AECOM will provide the following deliverables under this task:
70% Design Drawing Package (PDF format)
Preliminary Technical Specifications
Preliminary Opinion of Probable Construction Cost.
TASK 3 – 90% DESIGN PACKAGE
AECOM will advance the approved 70% Design Package to the 90% design level and incorporate City review comments into a substantially complete set of contract documents. The purpose of the 90% Design Package is to finalize design details, complete electrical and instrumentation drawings, prepare front-end bidding documents, and provide the City with a near-final set of construction documents for review prior to preparation of the final bid package.
1. Comment Review Meeting
AECOM will conduct a review meeting with City staff to discuss comments received on the 70% Design Package. The meeting will be used to confirm outstanding design decisions, review proposed revisions, and establish directions for preparation of the final contract documents.
2. Incorporate Comments & Finalize Opinion of Probable Cost AECOM will review, address, and incorporate City comments into the 90% Design Package.
The Opinion of Probable Cost will also be finalized.
3. Final Specifications & Contract Documents
AECOM will prepare front-end bidding and contract documents and update the 70% Specifications to a 90% design level. These documents will include applicable City bidding requirements, contract forms, and general project information necessary to support project advertisement and procurement. AECOM assumes City will supply AECOM with City front-end document templates when 70% design begins.
4. 90% Design Drawings
AECOM will refine the 70% drawings and complete the detailed EI&C design. The 90% Design Package is expected to be 70 sheets, including:
Equipment Motor Schematics.
Conduit, Panel, and Lighting Fixture Schedule.
SCADA Control Panel Elevation and Details
Electrical & Instrumentation Details
AECOM
5 5. Quality Control / Quality Assurance
AECOM will implement its ISO-certified Quality Management System procedures throughout development of the 90% Design Package. The design package will undergo an independent multidisciplinary quality assurance and quality control review by qualified senior engineers experienced in wastewater facilities, instrumentation and controls, electrical systems, and structural design. Review comments will be resolved prior to submittal to the City.
Deliverables
AECOM will provide the following deliverables under this task:
90% Design Package (PDF format)
Final Opinion of Probable Cost
TASK 4 – 100% DESIGN & IFB PACKAGE
AECOM will prepare the final Plans, Specifications, and Estimate (PS&E) package suitable for bidding and construction procurement.
1. Final Design Development
AECOM will review comments received on the 90% Design Package and incorporate them into the 100% Design, consisting of complete plans, specifications, and supporting contract documents required for bidding.
2. Issue for Bid Package
AECOM will coordinate with the City regarding the anticipated bid schedule, address review comments, and finalize the 100% Design documents for advertisement to be issued as the Issue for Bid (IFB) Package. A set of hard copy Contract Document will also be prepared and submitted to City for future reproduction.
3. Quality Control / Quality Assurance
AECOM will perform a final independent QA/QC review of all contract documents to verify consistency between drawings, specifications, and bidding requirements prior to issuance.
Deliverables
AECOM will provide the following deliverables under this task:
100% Final Design Package
Issued-for-Bid (IFB) Package (PDF format)
Hardcopy set of Contract Documents
TASK 5 – PROJECT MANAGEMENT AND MEETINGS
AECOM will provide project management services throughout the design of the project.
1. Project Management and Coordination
AECOM will monitor project budget, schedule, staffing, and overall project performance. Project management efforts will include coordination among project disciplines, communication with City staff, monitoring project progress, and tracking action items.
For budgeting purposes, project management assumes approximately one (1) hour per week throughout 12 months of design.
AECOM
6 2. Progress Meetings
AECOM will conduct biweekly project status and coordination meetings with the City Project Manager during the design phase, with up to twenty-six (26) meetings anticipated. Meetings will be conducted via teams with a duration of not more than 1 hour each.
AECOM will prepare meeting agendas and summaries for distribution following each meeting.
Deliverables
AECOM will provide the following deliverables under this task:
Meeting agendas and summaries
TASK 6 – BID SUPPORT SERVICES
AECOM will provide engineering support services during the bidding phase to assist the City with procurement of construction services.
1. Pre-Bid Conference
AECOM will attend one (1) pre-bid conference
2. Respond to Bidder Requests for Information (RFIs)
AECOM will respond up to thirty (30) RFI’s
3. Prepare Supporting Documentation for Addenda
AECOM will assist City preparing documents for up to 2 addendums
4. Prepare Issue for Construction Package
Following bid award, AECOM will incorporate addenda revisions into the contract drawings and prepare a conformed Issued-for-Construction (IFC) drawing set.
Deliverables
AECOM will provide the following deliverables under this task:
Attendance at one (1) pre-bid conference
Responses to bidder RFIs (up to 10)
Supporting documentation for up to two (2) addenda
Issued-for-Construction Drawing Package
TASK 7 – CONSTRUCTION PHASE SERVICES
AECOM will provide engineering support services during construction to assist the City with implementation of the project and interpretation of the contract documents.
1. Pre-Construction Conference
AECOM will attend one (1) pre-construction conference
2. Respond to Requests for Information (RFIs)
AECOM will respond up to eighty (80) RFI’s
3. Review Submittals
AECOM will review up to one hundred (100) shop drawings, product data, and equipment information submittal or resubmittal.
AECOM
7 4. Assist City with Change Orders
AECOM will assist with evaluation and preparation of up to eight (8) change orders.
5. Provide Final Walkthrough and Punchlist
AECOM will participate in the final project walkthrough, document incomplete or corrective work items, and amend these items to punch list.
6. Prepare Record Drawings
AECOM will prepare a set of record drawings using contractor-provided record information and marked-up contract documents
7. Monitor Project Budget and Schedule during Construction AECOM will monitor their budget and schedule over the course of 18 months of construction.
Deliverables
AECOM will provide the following deliverables under this task:
RFI and submittal review documentation.
Support preparation of change orders
Punch List mark-up
One (1) Record Drawing Package (PDF format).
ASSUMPTIONS & EXCLUSIONS
1. All City-provided data are assumed accurate and complete.
2. City Front-end Documents and AECOM CSI formatted technical specifications will be used
3. Geotechnical Investigation, including material & soils testing, are excluded from the scope.
4. Assumed City will provide the Geotechnical Investigation of the site
5. Flow monitoring and utility location services are excluded from the scope
6. City will mark buried utilities, coordinate with utility company, and conduct potholing as needed
7. It is assumed that the Contractor shall provide an acceptable submittal by the second submission.
8. Stormwater Pollution Prevention Plan preparation is the Contractor’s responsibility and is excluded from AECOM scope.
9. Punchlist & Final Job walk: One visit assumed; Contractor to provide the Punchlist.
10. Preparation of multiple bid packages or additional project phases is excluded from the scope.
11. Coordination efforts and filing of applications with utility companies, potholing or permitting agencies are excluded from the scope.
12. Unless otherwise stated, meetings are to be virtually via phone or MS Teams.
13. One signed hard copy of the plans and specifications will be provided.
14. Backflush system will utilize pre-manufactured water storage tank without a shade structure; tank height may exceed existing site fencing height.
15. Bridge crane structure is assumed to be in working condition. Scope to inspect or certify Bridge Crane structure is not included. We will include in the design only replace the motorized hoist in kind.
AECOM
8 SCHEDULE AND AVAILABILITY
AECOM is available to commence work upon written authorization to proceed. AECOM proposes to complete the work in accordance with the schedule estimate identified below. AECOM will discuss the schedule with the City during the kickoff meeting and will adjust accordingly.
TASK DURATION* MONTHS ELAPSED
(since Project Start)
Kickoff Meeting /Site Visit 1 Week from Notice to Proceed - 30% Design & Equipment Memo 4 months after Kick-off 4
30% Design Package Complete 2 months after 30% Design Memo 6 70% Design Package Complete 3 months after 30% Design Review meeting 9 90% Design Package Complete 2 months after 70% Design Review meeting 11 100% Design Package Complete 1 month after 90% Design Review meeting 12 *Schedule assumes City returns review comments in 2 weeks after receipt of deliverable.
FEE
The estimated fee for the defined scope is proposed on a time and material fee, not‑to‑exceed basis, unless prior written approval is obtained for additional services. Refer to the attached budget estimate workbook for further detail. AECOM’s fee is based on the labor rates established in the 2025 Library of Consultants Agreement with the City.
Task 1 – 30% Design $ 269,665
Task 2 – 70% Design $ 345,690
Task 3 – 90% Design $ 93,030
Task 4 – 100% Design & IFB Package $ 17,625
Task 5 – Project Management & Meetings $ 33,360
Subtotal (Design) $ 759,360
Task 6 – Bid Support Services $ 39,160
Task 7 – Construction Phase Services $ 306,480
Subtotal (Construction) $ 345,640
Total $ 1,105,000
We look forward to working with the Water Department on this important Project.
Yours sincerely,
Patrick Tsang, PE Dan Cronquist, PE, PLS
Project Manager Principal Engineer
Staffing Plan
Budget
City of Bakersfield
McCutchen Lift Station Rehabilitation
Project
Principal Engineer IIIPrincipal Engineer IIPrincipal Engineer ISenior Engineer IIISenior Engineer IISenior Engineer IProject Engineer VProject Engineer IVProject Engineer IIIProject Engineer IIDesign/CADD SupervisorSr. Designer /CADD OprDesigner/ CADD Total HoursLaborOther Direct CostTotalHourly Rate - $350 $325 $300 $275 $250 $225 $200 $175 $150 $125 $200 $175 $150 Task 1 - 30% Design
1 Project Kick-off and Site Visit 11 11 11 8 8 1 8 1 59 16,475$ 330$ 16,805$ 2 30% Basis of Design & Equipment Selection Memo38 1 18 50 164 34 5 58 176 8 552 119,975$ 2,400 $ 122,375$ 3 Workshop 3 3 3 9 2,025$ 40 $ 2,065$
4 30% Design Drawings (~25 sheets) 3 1 4 32 51 4 8 334 25 147 10 66 685 120,700$ 2,410 $ 123,110$ 5 Quality Control / Quality Assurance 8 8 16 5,200 $ 100$ 5,300$ Subtotal 60 13 41 93 226 39 5 66 521 34 147 10 66 1,321 $ 264,375 $ 5,280 269,655$ Task 2 - 70% Design
1 Comment Review Meeting (Assume 1 hour) 1 2 3 775$ 20$ 795$ 2 Incorporate City's Comments & Finalize Basis of Design1 1 4 12 40 8 16 82 14,750$ 300 $ 15,050$ 3 Preliminary Technical Specifications 4 20 4 24 24 24 48 24 40 3 215 42,800$ 860 $ 43,660$ 4 Preliminary Opinion of Probable Cost 1 1 1 24 8 40 1 1 77 15,900$ 320 $ 16,220$ 5 Control Narrative / Sequence of Operations 16 8 80 1 105 25,725$ 510 $ 26,235$ 6 70% Design Drawings ( ~60 sheets) 21 72 0 17 83 88 148 116 112 35 102 268 128 1190 233,550$ 4,670$ 238,220$ 7 Quality Control / Quality Assurance 8 8 16 5,400 $ 110$ 5,510$ Subtotal 51 101 2 50 137 192 172 164 216 77 114 268 144 1,688 $ 338,900 $ 6,790 345,690$ Task 3 – 90% Design
1 Comment Review Meeting (Assume 1 hour) 1 2 3 775$ 20$ 795$ 2 Incorporate Comments & Finalize Opinion of Probable Cost1 1 1 4 8 40 12 67 12,475$ 250 $ 12,725$ 3 Final Specifications & Contract Documents 8 20 48 48 124 20,400$ 410 $ 20,810$ 4 90% Design Drawings (~70 sheets) 14 4 22 50 60 10 64 70 294 56,200$ 1,120$ 57,320$ 5 Quality Control / Quality Assurance 2 2 4 1,350$ 30 $ 1,380$ Subtotal 17 3 1 17 52 50 - 60 88 58 12 64 70 492 $ 91,200 $ 1,830 93,030$ Task 4 – 100% Design & IFB Package
1 Final Design Development 1 1 1 3 6 16 9 36 73 12,900$ 260 $ 13,160$ 2 Prepare Issue For Bid Package 1 4 16 4 25 4,075$ 80 $ 4,155$ 3 Quality Control / Quality Assurance 1 1 300 $ 10$ 310$ Subtotal 1 1 2 4 10 - - - 16 16 13 - 36 99 $ 17,275 $ 350 17,625$ Task 5 - Project Management & Meetings
1 Project Management and Coordination
(Assume 1 hr./wk. over the course of 12 months) 52 12 64 15,800$ 320 $ 16,120$ 2 Progress Meetings (Up to 26) 26 26 26 78 16,900 $ 340 $ 17,240$ Subtotal - - - 78 26 - - - - 38 - - - 142 $ 32,700 $ 660 33,360$ Task 6 - Bid Support Phase Services
1 Pre-Bid Conference 2 2 1 5 1,175$ 20$ 1,195$ 2 Respond to Bidder RFIs (up to 30) 15 15 30 45 105 18,375$ 370$ 18,745$ 3 Prepare Supporting Documentation for Addenda (Up to 2)1 1 1 1 8 8 20 16 2 16 74 14,100$ 280$ 14,380$ 4 Prepare Issue for Construction Package 2 4 1 4 16 27 4,375 $ 465$ 4,840$ Subtotal 1 1 1 18 25 10 20 - 20 34 4 - 77 211 $ 38,025 $ 1,135 39,160$ Task 7 - Construction Phase Services
1 Pre-Construction Conference 2 2 1 5 1,175 $ 20$ 1,195$ 2 Respond to RFI (up to 80) 4 2 2 60 60 80 120 328 62,150$ 1,240$ 63,390$ 3 Review Submittals (Up to 100) 10 100 100 90 100 200 600 110,750$ 2,220$ 112,970$ 4 Assist City with Change Orders (up to 8) 4 4 4 60 80 8 64 160 384 78,200$ 1,560$ 79,760$ 5 Provide Final Walkthrough and Punchlist 1 4 8 8 4 8 33 7,200$ 250$ 7,450$ 6 Prepare Record Drawings 1 4 8 1 20 80 114 18,725$ 820$ 19,545$ 7 Monitor Project Budget and Schedule during Construction (Assume 1 hr./wk. over the course of 18 months) 78 78 21,450$ 720 $ 22,170$ Subtotal 8 6 8 218 250 108 94 100 16 290 84 - 360 1,542 $ 299,650 $ 6,830 306,480$ Total 138 125 55 478 726 399 291 390 877 547 374 342 753 5,495 $ 1,082,125 $ 22,875 1,105,000$ Personnel Hours