1 AMENDMENT NO. 1 TO THE AGREEMENT FOR
PROFESSIONAL SERVICES BETWEEN THE
CITY OF MANTECA AND CAROLLO ENGINEERS, INC.
This Amendment No. 1 (“Amendment”) to Agreement #C2023-136 (“Agreement”) between the City of Manteca and Carollo Engineers, Inc. is made and entered into this ___ day of ___________, 20__, by and between Carollo Engineers, Inc., a Delaware corporation (“Consultant”) and the City of Manteca, a municipal corporation (“City”).
RECITALS
A. On November 6, 2023, the City of Manteca entered into an Agreement with Consultant to provide professional services for the Design and Engineering services for the Wastewater Quality Control Facility (WQCF) Sludge Thickener & Dewatering Unit No. 3 System Design Project CIP 24006 & 24007.
B. City now desires to amend the Agreement in order to expand the scope of services to be undertaken by the Consultant.
C. Consultant represents that it has the necessary professional skills and experience to satisfactorily provide consulting services in a timely manner.
D. City desires to engage Consultant for the purposes of completing the scope of services identified.
NOW, THEREFORE, the parties hereby agree as follows:
1. Statement of Work. Attachment 1 to the Agreement is hereby amended by adding the tasks set forth in Attachment 1 to this Amendment, attached hereto and incorporated herein by reference, “Statement of Work and Activities #2”.
2. Paragraph 4 of the Agreement is hereby amended to read as follows:
“4. Compensation. Compensation to be paid to Consultant shall be in accordance with the Schedule of Charges set forth in Attachment 1, which is incorporated herein by reference. In addition to the Compensation for the Agreement, compensation for Amendment No. 1 services shall in no event exceed Nine Hundred Twenty Nine Thousand Eight Hundred Thirty Five Dollars ($929,835) without additional authorization from the City. In no event shall total compensation for work performed pursuant to this Agreement and Amendment No. 1 exceed One Million Eight Hundred Ninety Six Thousand Eight Hundred Eighteen Dollars ($1,896,818) without additional authorization from the City. Payment by City under this Agreement shall not be deemed a waiver of defects, even if such defects were known to the City at the time of payment.” ATTACHMENT 2
2 3. Except as otherwise provided in this Amendment, the Agreement shall continue in full force and effect.
THIS SPACE INTENTIONALLY LEFT BLANK
ATTACHMENT 2
3 TO EFFECTUATE THIS AMENDMENT, each of the parties has caused this Agreement to be executed by its duly authorized representative as of the date set forth in the introductory paragraph on page 1 above.
CITY OF MANTECA: CONSULTANT:
_________________________________ ___________________________________ Toni Lundgren (Type name of Consultant/form of organization)* City Manager
ATTEST: By: ___________________________________
(Signature)
_________________________________ ___________________________________ Cassandra Candini-Tilton, (Type name and title)
Director of Legislative Services
COUNTERSIGNED: By: ___________________________________
(Signature)
_________________________________ ___________________________________ Shay Narayan (Type name and title)
Director of Finance
COUNTERSIGNED: Address: ____________________________
_________________________________ ____________________________ Stephanie Van Steyn,
Director of Human Resources Telephone: ____________________________ APPROVED AS TO FORM:
L. David Nefouse, City Attorney
By:_________________________________
Daniella Green, Assistant City Attorney
Ryan Sellman, Vice President Anne Prudhel, Executive Vice President 2795 Mitchell Drive Walnut Creek, CA 94598 (209)518-6855 Carollo Engineers, Inc.
a Delaware Corporation
ATTACHMENT 2
4 ATTACHMENT 1
STATEMENT OF WORK AND ACTIVITIES #2
ATTACHMENT 2
Introduction
The purpose of this amendment is to outline additional engineering design services that are necessary for the Consultant to complete the design of the recommended project from the Preliminary Design Report of sludge blending tanks for co-thickening, RDT thickening facility, and a third dewatering centrifuge.
Scope of Services
Task 1 – Project Management
1.1 Project Management
No changes.
Task 2 – Preliminary Design
2.1 Preliminary Design of WAS Thickening Improvements
No changes.
2.2 Preliminary Design of Dewatering Improvements
No changes.
2.3 Preliminary Design Report
No changes.
2.4 Existing Centrifuge Optimization
No changes.
Task 3 – Final Design
Task 3.1 – Final Design
The project elements were changed to the following:
• WAS Thickening Improvements:
o Conversion of the existing Dissolved Air Flotation Thickeners (DAFTs) into sludge blending tanks, including demolition of existing DAFT equipment, new divider walls in the DAFT tanks, new DAFT tank covers, mechanical equipment (mixing system, RDT feed pumps, sludge grinders), piping, and valves.
o New rotary drum thickener (RDT) facility, including new base slab and pre-engineered canopy structure, mechanical equipment (three RDTs and associated thickened sludge pumps), piping, and valves. The facility will be designed to include space for one future RDT.
o New polymer facility, including new base slab, pre-engineered canopy structure, and polymer feed system including polymer blend units, injection pump, piping, and injection ring for the RDT facility.
o New odor control facility, including new base slab and skid mounted odor control system.
o New yard piping:
ATTACHMENT 2
Primary sludge piping from the North Primary Sedimentation Tanks to the blend tanks. Including separating it from the primary scum piping. Primary sludge piping from the South Primary Sedimentation Tanks to the blend tanks. Including separating it from the primary scum piping. Blended sludge from the blend tanks to the RDT facility. Thickened sludge from the RDT facility to the digesters (separate from the primary scum).
o Replacement of MCC-E. Includes temporary MCC during construction, slab extension, and new stairs.
o Electrical items as required to accommodate the project elements described above. o Associated instrumentation for blend tanks and RDT facility. It is assumed that the existing PLC has capacity for additional IO or new IO cards necessary for additional IO. • Dewatering Improvements:
o No changes.
Task 3.2 – Geotechnical Investigation
Geotechnical work was expanded to include covering the updated project elements.
Task 3.3 – Site Survey Investigation
The site survey was expanded to include covering the updated project elements.
Task 3.4 – CEQA Support
Consultant will work with our subconsultant (Helix Environmental) to provide a CEQA recommendation.
This task is assumed to consist of only providing a letter of categorically exempt.
Task 4 - Bid Period Services
4.1 Bid Period Services
The number of addenda prepared by the Consultant was increased from one to two and bid period increased from one month to two months.
Budget and Schedule:
Table 1 presents the labor and budget estimates for this project amendment. Consultant shall complete the project based on the following updated schedule:
• Task 3 – Complete by December 31, 2024.
• Task 4 – As-needed during the two-month bid period.
Assumptions:
No changes.
ATTACHMENT 2
Total
E&IC Geotech Survey CEQA
Beecher Kleinfelder O'Dell PECE PECE Escalation Travel Printing $360 $340 $324 $274 $249 $223 $233 $168 $149 Hours Year Fee Fee Fee Fee Fee Fee Fee Fee Fee Fee Fee $15.00 Fee Fee Fee Fee 1 Project Management 0 0 0 0 0 0 0 0 0 0 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ -
1.1 Project Management 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - 2 Preliminary Design 0 0 0 0 0 0 0 0 0 0 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ -
2.1 Preliminary Design of WAS Thickening Improvements 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - 2.2 Preliminary Design of Dewatering Improvements 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - 2.3 Preliminary Design Report 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - 2.4 Existing Centrifuge Optimization 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - $ - 3 Final Design 52 251 251 504 502 125 376 376 75 2,512 $ 638,304 $ - $ 638,304 $ 181,940 $ 10,000 $ 15,000 $ 10,000 $ - $ 216,940 $ 21,694 $ 238,634 $ 37,680 $ 4 $ - $ - $ 37,684 $ 914,622
3.1 Final Design 50 251 251 502 502 125 376 376 75 2,508 2024 $ 637,036 $ - $ 637,036 $ 181,940 $ 181,940 $ 18,194 $ 200,134 $ 37,620 $ - $ - $ - $ 37,620 $ 874,790 3.2 Geotechnical Investigation 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ 10,000 $ 10,000 $ 1,000 $ 11,000 $ - $ - $ - $ - $ 11,000 3.3 Site Survey Investigation 0 0 0 0 0 0 0 0 0 0 2024 $ - $ - $ - $ 15,000 $ 15,000 $ 1,500 $ 16,500 $ - $ - $ - $ - $ 16,500 3.4 CEQA Support 2 0 0 2 0 0 0 0 0 4 2024 $ 1,268 $ - $ 1,268 $ 10,000 $ 10,000 $ 1,000 $ 11,000 $ 60 $ 4 $ - $ 64 $ 12,332 4 Bid Period Services 3 3 0 18 15 3 5 3 3 53 $ 13,552 $ 813 $ 14,365 $ - $ - $ - $ - $ - $ - $ - $ - $ 795 $ 53 $ - $ - $ 848 $ 15,213
4.1 Bid Period Services 3 3 0 18 15 3 5 3 3 53 2025 $ 13,552 $ 813 $ 14,365 $ - $ - $ - $ - $ 795 $ 53 $ - $ 848 $ 15,213 Total 55 254 251 522 517 128 381 379 78 2,565 $ 651,856 $ 813 $ 652,669 $ 181,940 $ 10,000 $ 15,000 $ 10,000 $ - $ 216,940 $ 21,694 $ 238,634 $ 38,475 $ 57 $ - $ - $ 38,532 $ 929,835 Original Contract Total Amount $ 966,983 Amendment No. 1 Total Amount $ 929,835 Contract Total Amount with Amendment No. 1 $ 1,896,818 Task Description
Midpoint
of Task
Labor
Escalation
Total
Escalated
Labor Costs
Other Direct
Costs Total Total Fee
Carollo Labor
Carollo Total Labor
Costs
CAD
Technician
Document
Processing
Lead
Professional
Sludge
Sampling
Table 1 - Carollo Fee Estimate for Amendment No. 1
WQCF Sludge Thickener and Dewatering Unit No. 3 System Design Project Tasks ODCs
Subtask Subtotal 10% Markup Total
#
Total
Hours
Senior
Professional
Lead Project
Professional
Project
Professional Professional Assistant Professional Senior CAD Technician Task #
ATTACHMENT
2