Project Name/No.: Russell Ave. & Walnut Ave. Contract No.: 2025-187 (A2) Water Line Replacement
Design Services (WA223)
Project Manager: PW/ C.W. Chan Approved: ______________ AMENDMENT NO. 2
TO AGREEMENT FOR SERVICES
THIS AMENDMENT TO THE AGREEMENT FOR SERVICES (“Amendment”) by and between the CITY OF CHINO, a California municipal corporation (“City”) and Hunsaker and Associates Irvine, Inc., a California Corporation (“Consultant”) is effective as of the 24th day of March, 2026.
RECITALS
A. City and Consultant entered into that certain Agreement for Contractual Services dated November 19, 2024, ( “Agreement”) whereby Consultant agreed to provide Design Engineering Services for the Walnut Avenue Water Line Replacement Project (WA242).
B. City and Consultant entered into Amendment No. 1 on July 1, 2025, to extend the Term of the Agreement for an additional two Fiscal Year (2025-26 & 2026-27).
C. City and Consultant now desire to amend the Agreement to add to the scope of work to add Russell Avenue with potholing and CCTV for part of Walnut Avenue and to increase the total compensation by $94,620.
TERMS
1. Contract Changes. The Agreement is amended as provided herein. (a) The scope of services provided in Exhibit “A -1” of the agreement is amended to include services as specified in “Exhibit A-2”, attached hereto. (b) The schedule of compensation provided in Exhibit “C -1” of the agreement is amended to include additional scope of services as specified in Exhibit “C -2”, attached hereto.
(c) Section 2.1, Contract Sum is hereby revised to increase the Contract Sum by Ninety-Four Thousand Six Hundred Twenty Dollars and Zero Cents ($94,620) for additional design engineering services, and shall read in its entirety as follows:
“For the services rendered pursuant to this agreement, Consultant shall be compensated in accordance with the “Schedule of Compensation” attached hereto as Exhibit “C” and incorporated herein by this reference, but not exceeding the maximum contract amount of Two Hundred Forty-Four Thousand Four Hundred Fifty Dollars and Zero Cents ($244,450.00).
2. Continuing Effect of Agreement. Except as amended by this Amendment, all provisions of the Agreement shall remain unchanged and in full force and effect. From and after 01225.0001/863605.1
the date of this Amendment, whenever the term “Agreement” appears in the Agreement, it shall mean the Agreement, as amended by this Amendment to the Agreement.
3. Affirmation of Agreement; Warranty R e Absence of Defaults. City and Consultant each ratify and reaffirm each and every on e of the respective rights and obligations arising under the Agreement. Each party represents and warrants to the other that there have been no written or oral modifications to the Agreement other than as provided herein. Each party represents and warrants to the other that the Agreement is currently an effective, valid, and binding obligation.
Consultant represents and warrants to City that, as of the date of this Amendment, City is not in default of any material term of the Agreement and that there have been no events that, with the passing of time or the giving of notice, or both, would constitute a mat erial default under the Agreement.
City represents and warrants to Consultant that, as of the date of this Amendment, Consultant is not in default of any material term of the Agreement and that there have been no events that, with the passing of time or the giving of notice, or both, would constitute a material default under the Agreement.
4. Adequate Consideration. The parties hereto irrevocably stipula te and agree that they have each received adequate and independent consideration for the performance of the obligations they have undertaken pursuant to this Amendment.
5. Authority. The persons executing this Amendment on behalf of the parties hereto warrant that (i) such party is duly organized and existing, (ii) they are duly authorized to execute and deliver this Amendment on behalf of said party, (iii) by so executing this Amendment, such party is formally bound to the provisions of this Amendment, and (iv) the entering into this Amendment does not violate any provision of any other agreement to which said party is bound.
[SIGNATURES ON FOLLOWING PAGE]
01225.0001/863605.1
IN WITNESS WHEREOF, the parties hereto have executed this Amendment on the date and year first-above written.
CITY:
CITY OF CHINO, a municipal corporation
Linda Reich, City Manager
ATTEST:
Natalie Gonzaga, City Clerk
APPROVED AS TO FORM: APPROVED AS TO CONTENT:
ALESHIRE & WYNDER, LLP
_____________________________ _____________________________
Fred Galante, City Attorney Hye Jin Lee, P.E., Director of Public Works
CONSULTANT:
HUNSAKER AND ASSOCIATES IRVINE,
INC.:
By:
Name: Doug Staley
Title: President
By:
Name: Kamal Karam
Title: Vice President
Address: 3 Hughes
Irvine, CA 92618
Two corporate officer signatures required when Consultant is a corporation, with one signature required from each of the following groups:
1) Chairman of the Board, President or any Vice President; and 2) Secretary, any Assistant Secretary, Chief Financial Officer or any Assistant Treasurer.
Submitted by email
February 9, 2026 (revised 2/27/26)
CITY OF CHINO
ATTN: Chi Wai Chan, Associate Engineer
13220 Central Avenue
Chino, CA 91710
Subject: Proposal for Contract Amendment for Walnut Avenue Water Main Project Adding Russell Avenue with potholing and CCTV for part of Walnut Avenue Dear Mr. Chan:
Hunsaker & Associates Irvine, Inc. (H&A) is pleased to submit this proposal for your consideration. Our proposal consists of the following:
· Cover letter with work scope
· Copy of ASTM D2774 Underground Installation of Thermoplastic Pressure Piping · Exhibit #1 – Russell Avenue potholing plan
· Exhibit #2 – PVC conduits for PRV vaults at Monte Vista and Walnut · Analysis for Lateral Location Cost
· Cost Breakdown
Hunsaker has augmented our core team with two highly qualified subconsultants to meet the needs of this specific situation
Boudreau Pipeline – Potholing
Boudreau Pipeline Corporation (BPC) was founded by Alan Boudreau in 1996. Since then BCP has grown to more than 260 employees and up to $60 million in annual revenues. As a Subsurface Utility Engineering (SUE) Company, BPC truly understands the value of gathering good underground utility data prior to construction to eliminate delays and extra costs associated with underground substructures.
National Plant Services – CCTV Investigation
Founded in 2012, National Plant Services has proudly been serving cities and towns throughout the west coast for the last 40 years. They have the expertise to get the toughest jobs done right, and the latest equipment and processes to make it cost effective. National Plant Services offer a wide-range of investigation, evaluation, maintenance and trenchless rehabilitation services, unmatched in the industry.
Investigate Engineering Solutions
Some of this effort has already been done with the expectation that the cost will be covered by this amendment. For example, review of some available information on required cover over PVC pipe found the applicable ASTM standard (attached) which includes the following paragraph:
EXHIBIT "A-2"
A2-1
S
everal manufacturers’ information will need to be checked for their recommendations including pipe bedding and we will need to review the available geotechnical data for the proposed/existing pavement section on Russell. We will include the conceptual street cross section showing the two City standards and the impact on the pipeline cover. This information will be combined with the potholing results to optimize the proposed pipeline profile with a brief report to the City summarizing the findings and to get City confirmation of the preferred alternative.
Incorporate the Russell line into Walnut PS&E
H&A will update and revise the existing proposed plan and profile based on our investigations and put it (and details for the connections at each end) into the present Walnut plan set, expand the cost estimate to include the Russell facilities and adjust any necessary technical specifications.
Potholing along Russell Avenue
H&A has obtained a cost from Boudreau for the potholes and we have included H&A efforts to survey the locations, process the field data and augment the plan and profile drawing (see attached exhibit).
CCTV along Walnut Avenue
H&A has obtained a cost from National Plant Services for CCTV investigation to locate existing laterals, and we have included H&A efforts to survey the locations, process the field data and augment the plan and profile drawing. We have reduced the initial scope by 50% since we only need the sewer laterals that cross the proposed waterline and not laterals on both sides. As noted in an earlier email, the City can delete this work and include a bid item to address sewer lateral crossings with a unit price basis; however, with the reduced scope and related cost, we believe that this is the more cost-effective strategy.
SCADA Conduits for PRV at Monte Vista and Walnut
H&A will develop a design detail for a set of 3 conduits 4-inch PVC from new cored holes in vault wall of existing PRV vault to new pullbox behind sidewalk and outside of curb return/curb ramp area. NOTE: Existing PVC pipeline at PRV vault has only 3’-3” of cover and conduits will pass above the pipeline (see attached exhibit) Delete 700 feet Walnut waterline from Central to Tenth
H&A will reduce the scope and budget to address this reduction.
Bid and Construction Support (Russell only)
This task includes response to RFI’s and review of submittals as requested by City staff. No attendance at meetings, conference calls or site visits and no involvement in addendums or change orders unless caused by errors and omissions by Hunsaker (those will be done at no charge to the City). Electronic drafting will be done of changes made during construction A2-2
from a single redline (combined comments by all involved and inconsistencies resolved) with CAD file provide to City.
Miscellaneous Services
This task is to provide some flexibility for City staff to accommodate minor scope changes that require small budget shifts. Funds will only be used with prior written authorization of City staff.
These tasks cover the added efforts in other areas such as coordination with City staff that are part of the original contract scope, with the exception of the hydraulic modeling being limited to Walnut Avenue pipeline only. The intended outcome is a complete and seamless PS&E package including Walnut Avenue and Rusell Avenue improvements.
Note that 40% of the cost of this amendment is for subconsultant efforts (potholing and CCTV investigation).
Upon approval of this contract amendment, it will require 6-8 weeks to “catch up” with the original construction documents. A major portion of that time is related to the potholing and CCTV efforts which must be done before detailed design can proceed.
We are looking forward to continuing our service to the City of Chino and working with you on this very important project. Should you have any questions, please contact me via email at [email protected] or by phone at (949) 293-6537.
Very truly yours,
HUNSAKER & ASSOCIATES IRVINE, INC.
Rich Norton, PE
Project Manager
A
2-3
A2-4
A2-5
A2-6
A2-7
A2-8
A2-9
A2-10
Proposed Waterline
Alignment
Legend
Proposed Alignment Location
Assumed Potholing Location
Existing waterline
connection shall be
fully exposed and
identified as tee or
cross
A2-11
3 PVC CONDUITS 4
INCH DIA. 8
INCHES CENTER
TO CENTER
Exhibit #2 For Contract Amendment
WALNUT WATER LINE REPLACEMENT
Hunsaker 2/24/26
A2-12
Responsible Cost per
Party Lateral
CCTV investigation $525.00 quote from National Plant Services H&A markup on subs $52.50 10% of raw cost
Locate field marking $87.50 1/4 hour @ $350.00 2 man crew Process field data and plot $50.00 1/4 hour @ $200.00 engineer TOTAL PER LATERAL $715.00 Conservative production 1 per hour rounded to $700/lateral
Walnut laterals 20 $14,000.00APN's counted on draft drawing Monte Vista to Central minus 10
laterals shown on BA-0859 dwg.
Laterals to one side xing waterline
LATERAL LOCATING COST - Chino Walnut Ave Water Lines 2/9/26 NotesDescriptionC2-1
E
XHIBIT "C-2"
Engineer CAD Tech. Survey
Office Staff 1 person 2 person 3 person CCTV POTHOLING
DESCRIPTION LEAD FIRM $240 $220 $200 $200 $200 $270 $350 $420 MAN-HOURS LABOR COST EXPENSES NATIONAL PLANT SER. BOUDREAU
H&A 3 24 8 35 $7,060 $0 $0 $0 $7,060
H&A 1 24 32 57 $11,420 $0 $0 $0 $11,420
POTHOLING - Russell Only and survey markings H&A 1 2 4 4 8 19 $5,020 $2,400 $0 $24,000 $31,420 16 potholes @ $1,500 each
CCTV - Walnut (Monte Vista to Central one side) and survey markingsH&A 1 2 4 6 12 25 $6,820 $1,400 $14,000 $0 $22,220
SUBCONSULTANT
H&A 3 12 24 39 $7,860 $0 $0 $0 $7,860
H&A 0 0 -20 -20 -$4,000 $0 $0 $0 -$4,000
H&A 2 24 24 50 $10,040 $0 $0 $0 $10,040
H&A 0 0 0 0 $0 $0 $0 $0 $8,600
11 88 76 10 - 20 - 205 $44,220 $94,620TOTAL BUDGET
AMENDMENT
PROPOSAL
TOTAL TASK
COST
Principal Project
Manager
SUBCONSULTANTSField Survey
Labor Hours by Classification
Hunsaker & Associates
Incorporate Russell into Walnut PS&E- add 1 plan
and profile sht and 1 detail dwg to Walnut set
Miscellaneous added design services as directed
by City staff (10% of total)
3/2/26
Investigate engineering solutions for Russell
includng vertical cover, clearances, pipe material,
bedding scenarios
CHINO Walnut Street Waterline
COST BREAKDOWN SPREADSHEET
Detail SCADA conduits and pullbox to PRV at
Walnut and Monte Vista & coord with City staff
Delete 700' Walnut plan and profile from Central to
Tenth
Russell responses to RFI’s and review of
submittals as requested by City staff and as-builts
260302 CHINO Waterline - Cost Breakdown.xlsC 2-2