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HomeMy WebLinkAboutAgreement_Water Service_5/12/2022_Chen-Moore & AssociatesDATE: S I d d VILLAGE OF TEQUESTA CONSULTING SERVICES WORK AUTHORIZATION VILLAGE RFQ. NO.: UTIL 06-20 WORK AUTHORIZATION NO.CM UTL21.01 FOR CONSULTING SERVICES PROJECT N GAL CODE: 401-401-531.302 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 (SUB CONSULTANTS) 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. H. SCOPE OF SERVICES The following is a description of the services to be provided under this Task Order. WORK AUTHORIZATION NO. CM UTL22.02 l of 8 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 I 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. TASK 2 — DATA COLLECTION AND REVIEW WORK AUTHORIZATION NO. CM UTL22.02 2 of 8 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 iNlodel 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: • 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: WORK AUTHORIZATION NO. CM UTL22.02 3 of 8 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. TASK 3 — WDS EVALUATION AND RECOMMENDED IMPROVEMENTS A. Existing WDS Evaluation WORK AUTHORIZATION NO. CM UTL22.02 4 of 8 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&WO LOS Goals • Create and execute the model scenarios presented in Table 1 TABLE 1 CURRENT SYSTEM MODEL SCENARIOS ENVISIONED SCENARIO TOPOLOGY DEMAND ALTERNATIVE SCENARIO ALTERNATIVE TYPE 1 A 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 I 3A2 Current System Average Demand in Most EPS Challenging Month Less Auto Flushers (i.e., all Auto Rushers Turned Off) • Evaluate the hydraulic performance of the existing WDS using the WDS H&WQ LOS goals and the results of Scenarios I 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: • 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. WORK AUTHORIZATION NO. CM UTL22.02 5 of 8 TABLE 2 IMPROVED SYSTEM MODEL SCENARIOS ENVISIONED SCENARIO TOPOLOGY DEMAND ALTERNATIVE SCENARIO ALTERNATIVE TYPE 1 B Improved System Maximum Daily Demand (MDD) + SS Fire Flow (FF) 2B Improved System Peak Hourly Demand (PHD) SS 3B 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 TVI. 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. Completion of Scenario 3B may require up to 5 auto flusher locations. WORK AUTHORIZATION NO. CM UTL22.02 6 of 8 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 Meetine 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 IV. COMPENSATION AND PAYMENT 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 — 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 By: Print Name: Grt A4 Title: Ib'i re - Goo r VILLAGE OF TEQUESTA By: "may a� mb►►y � �►� nS Date: `/ a O� D a %' WORK AUTHORIZATION NO. CM UTL22.02 8 of 8