The URL can be used to link to this page

Home My WebLink AboutContract 48728-A2 4 CErV ED PR 3 0 2020 Cci7ys,V]jvmh, as�2s-A2 CITY SECRETARY CONTRACT NO. STATE OF TEXAS § § COUNTIES OF TARRANT, § DENTON, PARKER AND WISE § SECOND AMENDMENT TO FORT WORTH CITY SECRETARY CONTRACT NO.48728 WITH ALAN PLUMMER INC. THIS SECOND AMENDMENT is entered into by and between the City of Fort Worth ("City"),a home-rule municipality in the State of Texas,acting through Dana Burghdoff,its duly authorized Assistant City Manager, and Alan Plummer Associates, Inc. ("Consultant") acting through Ellen T. McDonald,Principal. WHEREAS, the City and Consultant, entered into that certain agreement identified as City Secretary Contract No. 48728 for services related to Mary's Creek Reclamation Facility Permit Application Regulatory Compliance("Contract");and WHEREAS, on July 24,2018,the parties executed the First Amendment to the Contract to increase the not to exceed amount by$25,000; and WHEREAS, the parties agree that it is now necessary to increase the scope of services and the not to exceed for the performance of those services. NOW, THEREFORE, for and in consideration of the mutual covenants contained herein, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged and confessed,the parties hereto agree as follows: Section I: The CONTRACT is amended to include the additional services specified in the proposal shown as Exhibit A attached hereto and incorporated into the scope of services of the Contract. The cost to the City for the additional services to be performed by the Consultant shall not exceed$74,890.00. Section II: The CONTRACT is amended to provide for not to exceed amount of $490,839. Al l other provisions of the Contract which are not expressly amended herein shall remain in full force and effect. CFW/[AMENDMENT NO. I BERMEX INC.CSC 48070] Page I of 2 Executed on this the 29th day of April ,2020 CITY OF FORT WORTH: ALAN PLUMMER ASSOCIATES, INC. ")4 -4-DanaB ff( r 29,20101 Dana Burghdoff Ellen T.McDonald,PhD,P.E. Assistant City Manager Principal Date: 4/28/2020 APPROVAL R7 LADED: By: G�_ Chr.Stop erHarder,P.E. Fort Worth Water Director APPROVED AS TO FORM AND LEGALITY: Cl�nit4q k&4"y!d Christa R.Lopez-Reynold (Apr 29,2020)) Christa R.Lopez-Reynolds, Senior Assistant City Attorney ATTEST: y OF O1P Mary Kaiser ' City Secretary Z Date: �S�.��,� Contract Authorization: M&C: Date: Contract Compliance Manager: By signing I acknowledge that I am the person responsible for the monitoring and administration of this contract, �inclu ing pluring all performance and reporting requirements. By: CNR iJ IVAKV&Z Title: Wc%�� CFW/[AMENDMENT NO.2 Alan Plummer-Mary's Creek] Page 2 of 2 OFFI%J�. RECORD CITY SECRETARY FT. WORTH,TX Amendment#2: Mary's Creek Permitting Support Plummer Project No. 0318-059-01 Exhibit A Mary's Creek Water Reclamation Facility Nutrient Model Scope of Work and Schedule Plummer Associates, Inc., ("ENGINEER") is assisting the City of Fort Worth ("CLIENT") in the permit application for the proposed Mary's Creek Water Reclamation Facility (WRF). This scope of work describes additional water quality modeling services to support the permitting process. The focus of this effort is the development of a dynamic model to simulate the impact of nutrient constituents (i.e. nitrogen and phosphorus species) in the WRF effluent on algal communities downstream. The new model ("ExtendedW2") will be constructed by extending and refining the existing water quality model developed by Tarrant Regional Water District ("TRWD model"). The TRWD model is a dynamic water quality model built using the United States Army Corps of Engineers CE-QUAL-W2 (W2) model platform. Currently the TRWD model encompasses the Clear Fork and the West Fork of the Trinity River near Fort Worth, TX within its model domain. ENGINEER will add a new model segment branch for Mary's Creek to the TRWD model to create the ExtendedW2 model. In addition, model parameters in the ExtendedW2 model — such as kinetic rates and simulation period — will be reviewed and refined to ensure that the model is as accurate and reliable as possible within the constraints of the available data and model assumptions. The ExtendedW2 model will be used to simulate the fate and transport of WRF effluent nutrients from the proposed WRF outfall downstream to the confluence of the Clear Fork and West Fork Trinity River. The following is an overview of BASIC services to be provided by ENGINEER: A. Create a sampling plan to collect site-specific water quality data to develop model parameters; B. Develop the ExtendedW2 model by adding a new segment branch for Mary's Creek to the TRWD model; C. Review and refine model parameters in ExtendedW2 model; D. Evaluate model performance and sensitivity to model parameters; E. Other technical support; and F. Project Coordination. Plummer Associates, Inc. 1 CAUsers\chardel\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook\2FFFLISA\Exhibit_A_Mary's_Creek_WRC_Nutrient_Model_20200428_0626.doc x Amendment#2: Mary's Creek Permitting Support Plummer Project No. 0318-059-01 BASIC SERVICES Basic Services include the following tasks. Task A. Create sampling plan to collect site-specific water quality data to develop model parameters ENGINEER will develop a sampling plan for CLIENT to collect site-specific water quality data (e.g. nutrients, chlorophyll-a) in Mary's Creek to support the development of model parameters in the ExtendedW2 model. The plan will detail the sampling period, sampling sites, number and frequency of sampling trips, number of samples to collect and water quality parameters to be analyzed It is envisioned that this initial sampling effort will be conducted over the course of several months and will only involve the collection of grab samples and instantaneous water quality sonde measurements. The budget assumes that all sampling and analysis will be performed by the City. Task B. Add a new segment branch for Mary's_Creek to the TRWD model ENGINEER will add a model segment branch for Mary's Creek to the TRWD Model to create an extended model ("ExtendedW2"). Activities include: 1) Develop model segmentation for Mary's Creek using cross sections from existing HEC- RAS model for Mary's Creek; and, 2) Incorporate appropriate nutrient parameters from various literature sources and prior studies (e.g. TRWD Tracer Studies) into segments of the Mary's Creek branch. Task C. Review and refine model parameters in ExtendedW2 model ENGINEER will review and refine model parameters in the ExtendedW2 model. Activities include: 1) Review and adjust (if needed) the model simulation period to capture a more representative hydrological period; 2) Review and adjust model parameters to improve agreement with site-specific data collected from Task A and from other historical water quality data sources (such as TRWD Water Quality Database, Texas Commission on Environmental Quality (TCEQ) Surface Water Quality Monitoring (SWAM) database, etc.). Plummer Associates, Inc. 2 CAUsers\chardel\HppData\Local\Microsoft\Windows\INetCache\Content.Outlook\2FFFLISA\Exhibit_A_Mary's_Creek_WRC_Nutrient_Model_20200428_0626.doc x Amendment #2: Mary's Creek Permitting Support Plummer Project No. 0318-059-01 Task D. Other technical support; To the extent that budget allows, ENGINEER will provide other technical support related to the Mary's Creek permit application, as requested by the CLIENT. As part of this support, ENGINEER may perform some or all of the following tasks: • Compare model outputs with collected data to evaluate model performance; • Conduct sensitivity analyses on model parameters to evaluate range of predictions for key constituents such as chlorophyll-a, nitrogen and phosphorus species; • Summarize model assumptions, output and results on PowerPoint slides; • Data analysis or model development for other parameters such as bacteria or TDS; • Assessment of or documentation of treatment performance • Other tasks requested by the CLIENT Task E. Proiect coordination and meetings ENGINEER will conduct up to three meetings to provide updates on model findings to the CLIENT. ADDITIONAL SERVICES Additional Services are services that are not included in the BASIC SERVICES scope or budget. Additional Services may be necessary to support the permit application or facilitate the completion of its review but are not anticipated at this time to be necessary to accomplish the objectives of the project. If Additional Services are requested, ENGINEER will prepare a scope and budget for such services and will not perform Additional Services unless authorized to do so by the CLIENT. Additional Services may include, but are not limited to the following: • Modeling of additional scenarios beyond the current proposed scenarios; • Meetings with the CLIENT, regulatory agencies and stakeholders beyond BASIC SERVICES; • Participation in public meetings or contested case hearings; • Collection of field data beyond BASIC SERVICES (e.g. conducting long-term and/or continuous water quality monitoring, or bathymetry surveys) • Development of additional nutrient models using other platforms beyond CE-QUAL-W2 • Additional task requested by the CLIENT Plummer Associates, Inc. 3 C:\Users\chardel\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook\2FFFLISA\Exhibit_A_Mary's_Creek_WRC_Nutrient_Model_20200428_0626.doc x Amendment#2: Mary's Creek Permitting Support Plummer Project No. 0318-059-01 BUDGET AND SCHEDULE Budget estimates are provided in Table 1. Compensation by the CLIENT to the ENGINEER will be on a time-and-materials not-to-exceed basis. The budget for Basic Services is $74,890. Completion of tasks assumes Notice to Proceed is received by May 1, 2020. Table 1. Budget Summary Task Description Hours Budget Estimated Estimated Completion Create a sampling plan to collect site- A specific water quality data to develop 34 $5,910 May 8, 2020 model parameters Develop the ExtendedW2 model by B adding a new segment branch for Mary's 120 $19,860 June 12, 2020 Creek to the TRWD model C Review and refine model parameters in 150 $27,190 July 10, 2020 ExtendedW2 model D Other technical support 162 $16,030 August 21, 2020 E Project coordination and meetings 24 $5,460 -- RE Reimbursable Expenses -- $440 -- Total 406 $74,890 -- Plummer Associates, Inc. 4 C:\Users\charde1\AppData\Local\Microsoft\Windows\INetCache\Content.Outlook\2FFFLISA\Exhi bit_A_Mary's_Creek_WRC_Nutrient_Model_20200428_0626.doc x