HomeMy WebLinkAboutDocumentation_Regular_Tab 17_5/12/2022Agenda Item #17.
Regular Council
STAFF MEMO
Meeting: Regular Council - May 12 2022
Staff Contact: Matthew Hammond, Utilities
Director
Department: Utilities
Approve Work Authorization CM UTL22.02 — Water Quality Modelling & Evaluation — Chen Moore &
Associates
The Village owns and operates Public Water System (PWS) No. 4501438, which provides potable
water to over 5,000 connections within its utility service area. Potable water treated at the water
treatment plant is delivered to customers through a water distribution system (WDS) consisting of over
seventy-two miles of water distribution mains ranging in size from 4-inch to 16-inch in diameter. At the
January Regular Council Meeting the Village Council accepted the Water Distribution System (WDS)
Improvements Plan based on the results of the Hydraulic Model & Evaluation project. The Hydraulic
Model & Evaluation project developed a hydraulic model of the Village potable water distribution
system, including piping and high -service pumping system, to identify water system improvements and
to properly size the water mains being replaced in the Village water main replacement program to meet
the hydraulic needs of the system.
Included in the approved FY22 Budget is a Water Quality Modeling & Evaluation which will build on the
previously developed hydraulic model to evaluate the chlorine residual throughout the WDS and
develop improvements to optimize the Village's flushing program. In addition, fire flow improvements
related to an upgraded interconnect with the Town of Jupiter Public Water System (PWS) in the
northwest section of the Village PWS will be evaluated.
Staff recommends the professional engineering services for this project be completed by Chen Moore
& Associates, in conjunction with Wright Pierce, one of the Village's on -board engineering consultants.
The proposed Work Authorization CM-UTL22.02, in the amount of $75,084. If approved, the project is
anticipated to be completed in the Fall of 2022.
Budget Summary - 401-241-531.302 - Engineering Services:
Project
Budget
Encumbered
Proposed
Projected
Remaining
Projected
Total
Existing
Encumbrances
$100,709
$100,709
$-
$-
$100,709
Water Quality
$75,000
$-
$75,084
$-
$75,084
Modeling
Misc.
Engineering
$11,000
$4,000
$-
$6,916
$10,916
Services
Account Total
$186,709
$104,709
$75,084
$6,916
$186,709
Page 228 of 254
Agenda Item #17.
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BUDGETED AMOUNT: AVAILABLE AMOUNT: EXPENDITURE AMOUNT:
$186,709 $82,000 $75,084
Additional Budgetary Information: Funding Source(s):
Water Enterprise Fund
Approve Work Authorization CM UTL22.02 — Water Quality Modelling & Evaluation with Chen Moore
& Associates in the amount of $75,084.
Proposed Work Authorization CM UTL22.02 - Water Quality Modeling
Page 229 of 254
Agenda Item #17.
DATE:
VILLAGE OF TEQUESTA
CONSULTING SERVICES WORK AUTHORIZATION
VILLAGE RFQ. NO.: UTIL 06-20
WORK AUTHORIZATION NO.CM UTL22.02 FOR CONSULTING SERVICES
PROJECT No.
G/L CODE: 401-241-531.302
CHEN-MOORE PROJECT NO.: 492.008
PROJECT TITLE: Water Quality Modeling and Evaluation
This Work Authorization, when executed, shall be incorporated in and shall become an integral
part of the Agreement for Professional Services dated September 10, 2021, between the Village of
Tequesta ("VILLAGE"), Chen -Moore & Associates ("CONSULTANT"), and Wright -Pierce, Inc.
or WCA (SUBCONSULTANTS) hereafter referred to as the Agreement.
I. PROJECT DESCRIPTION
As part of a previous effort, the CONSULTANT and SUBCONSULTANT, developed a hydraulic
model of the VILLAGE's water distribution system (WDS), calibrated the hydraulic model to steady-
state (SS) conditions (pressures and flows) observed during twenty hydrant flow tests, and used the
hydraulic model to size:
• water system improvements to satisfy fire flow goals, and
• replacement piping associated with the AC pipe replacement program.
The VILLAGE has asked the CONSULTANT Team to do the following:
expand the capabilities of the hydraulic model so that it can also be used to reasonably
estimate system pressures and total chlorine residual (TRC) throughout the WDS over
extended -period simulation (EPS) conditions, and
use the hydraulic and water quality (H&WQ) model to develop improvements to satisfy
the WDS H&WQ level of service (LOS) goals and the automatic flushing program to the
extent practical.
WORK AUTHORIZATION NO. CM UTL22.02 I of 8
Page 230 of 254
Agenda Item #17.
II. SCOPE OF SERVICES
The following is a description of the services to be provided under this Task Order.
TASK 1— Project Management and Meetings
A. Project Management
CONSULTANT will perform project management activities for the project. The activities
include contract administration, budget management, invoicing, monthly status reports,
scheduling, and coordination with VILLAGE.
B. Meetings
CONSULTANT and SUBCONSULTANT will attend the following Microsoft Teams or
similar enabled meetings with the VILLAGE. For each meeting the SUBCONSULTANT
will prepare a meeting agenda and meeting minutes.
• One Kickoff Meeting
• One Field Data Collection Plan Review Meeting
• One Draft Model Update and Calibration Technical Memorandum (TM) Review
Meeting
• One Draft WDS Evaluation and Recommended Improvements TM Review
Meeting
During the project kickoff meeting, the following will be discussed:
• Overall scope and schedule.
• Lines of communications.
• Critical success factors.
• Information needs.
• WDS H&WQ LOS Goals.
• Month in which the Village experiences the most challenges to maintaining TRC
in the WDS. This month is referred to herein as the "Most Challenging Month".
• Details of the work to be complete before the next meeting.
Task Assumption(s): The Scope of Services associated with this task assumes the following:
• VILLAGE will provide the information requested in Attachment 1 by the proposed receival dates.
• The Kickoff Meeting will occur within 7 seven calendar days of the Notice to Proceed (NTP).
• Draft TM review meetings will occur within 14 calendar days of submission of each Draft TM.
Tasks Deliverable(s): SUBCONSULTANT will submit the following to the VILLAGE and
CONSULTANT:
• Agenda and minutes for each meeting in PDF format.
WORK AUTHORIZATION NO. CM UTL22.02 2 of 8
Page 231 of 254
Agenda Item #17.
TASK 2 — DATA COLLECTION AND REVIEW
A. Hydraulic Data
CONSULTANT Team will collect data and perform tests as defined herein. Subsequently, WP will
use the collected data and test results to refine the model's calibration with respect to hydraulics. As
part of this task, CONSULTANT Team will do the following:
o Develop a Hydraulic Field Data Collection (FDC) Plan that summarizes:
o The following details associated with collection of WDS pressures using temporary
data loggers:
• The installation locations of up to 10 pressure data loggers.
• The duration over which pressures are to be recorded. This duration is
currently envisioned to be 1 week.
o The following details associated with proposed hydrant flow tests:
- The general procedures and equipment to be used for conducting up to 10
hydrant flow tests over the course of 2 consecutive days.
- The proposed locations of the pressure and flow hydrants associated with each
hydrant flow tests.
o The SCADA data to be collected and the required reporting intervals.
o The responsibilities of each party. The project fee assumes the following
responsibilities:
- Develop and coordinate execution of the Hydraulic FDC Plan:
SUBCONSULTANT
- Install/uninstall pressure data loggers: SUBCONSULTANT with assistance
from the Village
- Provide hydrant test equipment: VILLAGE
- Open/close system hydrant valves and install/uninstall hydrant test
equipment: VILLAGE
- Field verify each of the 3 emergency interconnects are closed immediate
before installation of the pressure data loggers: CONSULTANT with
assistance of the VILLAGE
- Perform hydrant flow tests: CONSULTANT with assistance of the VILLAGE
- Provide CSV file(s) containing requested SCADA data to
SUBCONSULTANT: VILLAGE
o The schedule for execution of the Hydraulic FDC Plan.
• Electronically submit a draft Hydraulic FDC Plan in PDF for review and comment.
• Conduct a MS Teams enabled meeting, as part of Task 1, with the VILLAGE to discuss the
plan and review comments.
• Update the Hydraulic FDC Plan based on the review comments and submit a final copy.
• Conduct a MS Teams enabled meeting, as part of Task 1, with the VILLAGE to finalize
coordination activities prior to executing the Hydraulic FDC Plan.
• Execute the Hydraulic FDC Plan with the assistance of VILLAGE.
B. Hydraulic Model Calibration
The intent of hydraulic model calibration is to make sure the model reasonably estimates system
pressures under specific demand conditions. As part of this task, SUBCONSULTANT will do the
following:
WORK AUTHORIZATION NO. CM UTL22.02 3 of 8
Page 232 of 254
Agenda Item #17.
Process the test results and field data collected as part of Task 2A.
Refine the model hydraulic calibration using the hydrant flow test results by doing the
following:
o Create SS scenarios within the hydraulic model to replicate static and flowing
conditions associated with each hydrant flow test.
o Refine the hydraulic calibration so that the model results reasonably match the
collected field data (i.e., pressures at pressure hydrants and data logger locations). It
is expected that the model will be calibrated by adjusting Hazen -Williams "C" Values.
Minor spatial demand adjustments may be made if reasonable.
C. TRC Correlation
SUBCONSULTANT will do the following:
o Select up to 5 distribution system sampling locations to use in the TRC correlation effort.
o Geocode the selected sampling locations and process the associated TRC results presented in
the quarterly reports during the Most Challenging Month.
o Process the provided average daily TRC concentrations in the finished water leaving the WTP
during the Most Challenging Month.
o Process monthly operating report (MOR) data to determine that average daily demands during
the Most Challenging Month.
Subsequently, WP will create a TRC extended period simulation (EPS) scenario and correlate the
model calculated TRC concentration to those observed in the field during the Most Challenging
Month. The duration of the EPS will be long enough for the model to achieve stable TRC results.
TRC correlation will be achieved by initially estimating and adjusting TRC decay coefficients.
D. Model Update and Calibration TM
As part of this subtask, SUBCONSULTANT will do the following:
• Develop a Model Update and Calibration TM that summarizes the model updates, the
hydraulic calibration efforts, and TRC correlation effort.
• Submit a draft PDF copy of the TM for review and comment.
• Conduct a MS Teams enabled meeting, as part of Task 1, with the VILLAGE to discuss the
TM and review comments.
• Update the TM based on the review comments and submit a final PDF copy of the TM.
Assumption(s): CONSULTANT Team's assumptions associated with this task are presented below:
• Responsibilities for the VILLAGE and CONSULTANT Team will be as indicated in Task 2A above.
• The VILLAGE will provide the electronic SCADA data to SUBCONSULTANT within 2 weeks of
completing field data collection effort.
• The Draft TM review meeting will occur within two weeks of submission of the draft TM.
Deliverable(s): CONSULTANT will electronically submit the following:
• Draft and final PDF copies of the Hydraulic FDC Plan.
• Draft and final PDF copies of the Model Update and Calibration TM.
WORK AUTHORIZATION NO. CM UTL22.02 4 of 8
Page 233 of 254
Agenda Item #17.
TASK 3 — WDS EVALUATION AND RECOMMENDED IMPROVEMENTS
A. Existing WDS Evaluation
SUBCONSULTANT will evaluate the ability of the existing WDS to satisfy the WDS H&WQ LOS
Goals. The calibrated hydraulic and water quality model will be used to replicate the hydraulic
performance and water quality condition within the WDS under different demand conditions. As part
of this task, SUBCONSULTANT will do the following:
• Summarize the WDS H&WQ LOS Goals
• Create and execute the model scenarios presented in Table 1
TABLE 1
CURRENT SYSTEM MODEL SCENARIOS ENVISIONED
SCENARIO I
TOPOLOGY
I DEMAND ALTERNATIVE
SCENARIO
ALTERNATIVE
TYPE
IA
Current System
Maximum Daily Demand (MDD) +
SS
Fire Flow (FF)
2A
Current System
Peak Hourly Demand (PHD)
SS
3A1
Current System
Average Demand in Most
EPS
Challenging Month
3A2
Current System
Average Demand in Most
EPS
Challenging Month Less Auto
Flushers (i.e., all Auto Flushers
Turned Off)
• Evaluate the hydraulic performance of the existing WDS using the WDS H&WQ LOS goals and
the results of Scenarios 1 A and 2A.
• Evaluate the likely TRC concentrations maintained in the existing WDS using the WDS H&WQ
LOS goals and the results of Scenario 3A1. NOTE: Scenario 3A1 will estimate the average TRC
concentrations maintained in the WDS using the current auto -
flusher locations and flushing
volumes.
• Evaluate the likely TRC concentrations maintained in the existing WDS using the WDS H&WQ
LOS Goals and the results of Scenario 3A2. NOTE: Scenario 3A2 will estimate the likely average
TRC concentrations in the WDS if all auto flushers were turned off.
B. Develop WDS Improvements
SUBCONSULTANT will use the modeling results obtained from Task 3A to develop improvements
to satisfy the WDS H&WQ LOS goals and optimize its auto flusher program to the extent practical.
As part of this task, SUBCONSULTANT will do the following:
WORK AUTHORIZATION NO. CM UTL22.02 5 of 8
Page 234 of 254
Agenda Item #17.
Create and execute the model scenarios presented in Table 2. Using these scenarios,
SUBCONSULTANT will develop preliminary WDS improvements needed to satisfy the WDS
H&WQ LOS Goals and optimize its auto -flushing program to the extent practical.
TABLE 2
IMPROVED SYSTEM MODEL SCENARIOS ENVISIONED
SCENARIO
TOPOLOGY
DEMAND ALTERNATIVE
SCENARIO
ALTERNATIVE
TYPE
1B
Improved System
Maximum Daily Demand (MDD) +
SS
Fire Flow (FF)
2B
Improved System
Peak Hourly Demand (PHD)
SS
313
Improved System
Average Demand in Most
EPS
Challenging Month With Optimized
Flushing Locations and Volumes
Develop total project costs for the proposed WDS improvements in 2022 dollars.
Figures and tables summarizing hydraulic and water quality model results, the proposed WDS
improvements, and total project costs will be included in TM as part of subtask 3D.
C. Prioritize WDS Improvements
To prioritize the implementation of the proposed WDS improvements, SUBCONSULTANT will
update the previous desktop risk analysis considering the additional improvements developed as
part of this project. The risk analysis is intended to account for an asset's physical condition, which
is quantified as the asset's Likelihood of Failure (LoF), and the impact that the asset's failure could
have on system performance, known as the asset's Consequence of Failure (CoF). The risk analysis
will be based on the same LoF and CoF categories and weighting factors and overall scoring
methodology as previously used.
D. WDS Evaluation and Recommended Improvements Technical Memorandum
As part of this subtask, SUBCONSULTANT will do the following:
• Develop a WDS Evaluation and Recommended Improvements TM, which summarizes the
work associated with this task.
• Submit a draft PDF copy of the TM for review and comment.
• Conduct a meeting, as part of Task 1, with the VILLAGE to discuss the TM and review
comments.
• Update the TM based on the review comments and submit a final PDF copy of the TM.
Assumption(s): SUBCONSULTANT assumptions associated with this task are presented below:
• The progress meeting will be scheduled as needed.
• The Draft TM review meeting will occur within two weeks of submission of the draft TM.
WORK AUTHORIZATION NO. CM UTL22.02 6 of 8
Page 235 of 254
Agenda Item #17.
• Completion of Scenario 313 may require up to 5 auto flusher locations.
Deliverable(s): SUBCONSULTANT will submit the following:
• Draft and final PDF copies of the WDS Evaluation and Recommend Improvements TM.
• Electronic copy of H&WQ model.
III. SCHEDULE
The Project will begin immediately after SUBCONSULTANT receives a written Notice -to -Proceed
(NTP) and an executed AGREEMENT from CONSULTANT. SUBCONSULTANT will coordinate
the Project schedule with VILLAGE and CONSULTANT but assumes the work will be complete
within 180 calendar days of receiving the written NTP.
TABLE 1
MILESTONE DATES RELATIVE TO NTP
Milestone
Days After
Receiving NTP
Kickoff Meeting
5
Draft FDC Plan
21
Draft FDC Plan Review Meeting
33
Final FDC Plan
47
Final FDC Plan Coordination Meeting
50
Start Field Data Collection Effort
52
Complete Field Data Collection Effort
65
SCADA Data Provided
79
Draft Model Update and Calibration TM
110
Draft Model Update and Calibration TM Review Meeting
124
Draft WDS Evaluation and Recommended Improvements TM
145
Draft WDS Evaluation and Recommended Improvements TM Review Meeting
159
Final WDS Evaluation and Recommended Improvements TM
180
CONSULTANT and SUBCONSULTANT proposes to complete the Scope of Service described
herein on a lump -sum basis for a not -to -exceed fee of $75,084. Table I summarizes
CONSULTANT's and SUBCONSULTANT's total not -to -exceed fee and breakdown of fees by task.
TABLE 1
SUMMARY OF ENGINEERING FEE
Task
Fee
Task 1— Project Management and Meetings
$ 5,958
Task 2 — WDS Water Quality Model Development and Calibration
$ 37,264
Task 3 — WDS Evaluation and Recommended Improvements
$ 31,862
Total Not -to -Exceed Fee
$ 75,084.00
WORK AUTHORIZATION NO. CM UTL22.02 7 of 8
Page 236 of 254
Agenda Item #17.
L] ► ;
The work authorized under this Work Authorization shall be performed under the terms and
conditions described within the Professional Services Agreement dated September 10, 2021, by and
between the Village of Tequesta ("VILLAGE") and Chen -Moore & Associates ("CONSULTANT").
Compensation shall not exceed the hourly rates currently in effect under this Agreement.
CHEN-MOORE & ASSOCIATES
ME
Print Name:
Title:
VILLAGE OF TEQUESTA
Date:
WORK AUTHORIZATION NO. CM UTL22.02
8 of 8
Page 237 of 254
Agenda Item #17.
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Page 238 0 254