HomeMy WebLinkAboutRH2 Engineering, Inc. - West Pasco WTP Improvements - Amendment No. 3 - ExecutedAMENDMENT NUMBER 3 to
PROFESSIONAL SERVICES AGREEMENT
16008 - West Pasco Water Treatment Plant Improvements
AGREEMENT NO. 20-021
WHEREAS, the City and RH2 Engineering, Inc. entered into a Professional Services
Agreement on 7/14/2020 to provide engineering services with respect to the West Pasco Water
Treatment Plant Improvements Project.
WHEREAS, the City and the RH2 Engineering, Inc. entered into the first amendment to
the Professional Services Agreement No. 20-021 on December 21, 2020; and
WHEREAS, the City and the RH2 Engineering, Inc. entered into the second amendment
to the Professional Services Agreement No. 20-021 on May 13, 2021; and
WHEREAS, the parties agree that all remaining terms and conditions of the PSA
(Agreement No. 20-021) not inconsistent with this third amendment, shall remain in full force
and effect.
NOW, THEREFORE, this agreement is amended to allow RH2 Engineering, Inc. to
provide additional design engineering services and to add additional time of performance
described within Exhibit A.
Scope of Work:
See Exhibit A.
2. Fee:
The compensation for this amendment is based on a Time and Materials Basis and is
not to exceed the amount of99$ ,731.00 for a total contact amount of $765,380.00.
please refer to Exhibit B for the breakdown of hours.
Time ofperformance:
The services shall now be complete for the project on or before 6/30/2022.
DATED THIS 1 d t'^ DAY OF �NjyS7� 92021.
CITY OF PASCO:
City of Pasco
Dave Zabell — City Manager
CONSULTANT
(52A ;�. O&VS91
RH2 Engineering, Inc.
Paul Cross, PE — Project Manager
Amendment No. 3 to Professional Services Agreement Page 1
RH2 Engineering, Inc.
16008 — West Pasco Water Treatment Plant Improvements
EXHIBIT A
Scope of Work
Amendment No. 3
City of Pasco
West Pasco Water Treatment Plant Improvements
12 MGD Expansion Phase 1
Additional Design and Permitting
July 2021
Background
The City of Pasco (City) originally contracted with RH2 Engineering, Inc., (RH2) in June of 2020 to
provide professional services to expand the West Pasco Water Treatment Plant (WPWTP) from
6 million gallons per day (MGD) to 12 MGD capacity, including preliminary design, design, and
permitting associated with these improvements. The main preliminary design deliverable was a
technical memorandum, which was then modified to be the Washington State Department of Health
(DOH) Project Report submittal.
The City's 2020 through 2025 Capital Improvement Plan (CIP) included $645k for "design" of the
WPWTP improvements and $3.975M for construction, which was identified as fully funded by City
Utility Rates. The proportion of indirect fees to estimated construction costs at that time was
16.2 percent, as shown in the table that follows.
City's Original Funding (CIP) WPWTP Improvements
Design Budget $645,000
Construction Budget $3,975,000
Total Project Budget $4,620,000
Percentage of Design Budget to Construction 16%
As RH2 was scoping this project, including predesign, design, and permitting, there were many
unknown aspects of the design. While the initial approach was to only complete predesign, the City
decided, for contract process simplification, to contract for the entire project using a projected scope
of work. RH2's total fee for predesign, design, and permitting was for $646k, and was based on the
projected scope of improvements and construction costs.
A draft of the Proposed Improvements and Design Criteria Technical Memorandum was completed
in October 2020 by RH2 and included core upgrades (i.e. raw and finished water pumps, additional
membrane racks, and process residuals handling system) and non -capacity upgrades (i.e. chemical
feed upgrades, heating, ventilation, and air conditioning (HVAC), supervisory control and data
acquisition (SCADA), and raw water purge) for the 12 MGD expansion. Core upgrades were estimated
to be a total construction cost of $12.51M, with $500k for non -capacity upgrades. With construction
City of Pasco Amendment No. 3
West Pasco Water Treatment Plant 12 MGD Expansion Phase 1 Exhibit A
Additional Design and Permitting Scope of Work
costs growing, RH2 assisted the City with applying for a DOH Drinking Water State Revolving Fund
(DWSRF) loan to obtain more funds for these improvements.
RH2 then reorganized the technical memorandum to logically split up the 12 MGD expansion project
into multiple phases, as well as plan the 18 MGD expansion to conceptually estimate this cost. The
phases of the project are as follows.
• Phase 1: WPWTP Treatment Capacity Upgrades ($7.78M)
o Adds two strainers
o Adds two membrane racks
o Adds a strainer and membrane rack residuals recovery system
o Adds all non -capacity functionality upgrades for the WPWTP
• Phase 2: Additional Pumping Capacity and Power Redundancy ($6.88M)
o Adds one Intake Pump Station (IPS) pump
o Adds two 3 MGD Zone 3 pumps
o Converts the existing backup WPWTP power generator for the IPS
o Adds a 2 megawatt generator dedicated to the WPWTP and its future expansion
o Adds raw water purge functionality
• Phase 3: Pumping Redundancy ($1.01M)
o Adds one IPS pump
o Adds one 6 MGD Zone 3 pump
• 18 MGD Future Plant Expansion ($6.55M)
o Adds one IPS pump
o Adds two membrane racks
o Expands the strainer and membrane rack residuals recovery system for redundancy
o Adds two Zone 1 pumps to the new high service pump station (to replace the existing
Zone 1 pumps in the treatment building)
o Adds one 6 MGD Zone 3 pump
As RH2 proceeded with the 30 -percent and 60 -percent design phases, further modifications to the
Phase 1 project arose from City staff comments on additional plant operational changes and site
layout modifications. RH2 also needed multiple negotiations with DOH on modifications to the
existing filter skids to meet current standards and on the filter to waste system details, and continued
to update the overall site plan to accommodate future improvements. As a result of the increased
site impervious areas, a more extensive stormwater report than anticipated was added to the project
scope. As a result of the DWSRF funding, the City asked RH2 to add a cultural resources subconsultant
2
City of Pasco Amendment No. 3
West Pasco Water Treatment Plant 12 MGD Expansion Phase 1 Exhibit A
Additional Design and Permitting Scope of Work
to the contract. The City is also adding a third -party constructability review, and RH2 will need more
time to prepare and respond to this previously unscoped review.
While the project's scope has grown in the predesign phase and the design phase through
60 -percent, RH2's predesign, design, and permitting fees have remained unchanged. This
amendment provides for additional design, permitting, and subconsultant fees to cover these
changes.
Task 2 (A)— Final Design Additional Services
Task 2 is amended to add four hundred fifty-six (456) hours for additional final design services,
including the following:
• Additional site/civil design based on changes to accommodate future improvements and
additional site access flexibility.
• Additional mechanical design to provide additional operations and maintenance
modifications, extensive piping modifications to comply with new requirements from DOH,
and further modifications to the PALL membrane systems and residuals recycling systems.
• Additional structural design to add additional bridge crane systems and modifications to
structures.
• Additional electrical design for site lighting and other process modifications.
• One (1) additional review process for preparing for and responding to a third -party
constructability review.
Task 3 (A)— Permitting Additional Services
Task 3 is amended to add forty-four (44) hours to cover additional permitting services, including the
following:
• Retain and manage a subconsultant to perform the required cultural review of the site per
the DWSRF requirements.
• Develop a stormwater report for the more extensive site improvements and impervious area
for review and approval by the City.
3
EXHIBIT B
Fee Estimate
City of Pasco
Amendment No. 3
West Pasco Water Treatment Plant Expansion
Additional Design and Permitting
Jul -21
Description
Total
Total Labor Total Subconsultant
Total Expense
Total Cost
Hours
.
........................................................................................................................
C.iaass... ificcaa.ti .. nn
Task2(A) Additional Final Design
456
$ 74,682 1 $
$ 12,201
$ 86,883
Task3(A) Additional Permitting 1 44 1 $ 7,4881 $ 4,974 $ 386 1 $ 12,848
PROJECT TOTAL 1 500 1 $ 82,170 1 $ 4,9741 $ 12,5871 $ 99,731