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Home My WebLink About2022-247BCCNA2018 WORK ORDER 12 ArcNLET Model This Work Order Number 11 is entered into as of this 6 day of Dec. , 2022, pursuant to that certain Continuing Consulting Engineering Services Agreement for Professional Services entered into as of this 1711 day of April, 2018 (collectively referred to as the "Agreement"), by and between INDIAN RIVER COUNTY, a political subdivision of the State of Florida ("COUNTY") and Tetra Tech, Inc. ("Consultant"). The COUNTY has selected the Consultant to perform the professional services set forth on Exhibit A (Scope of Work), attached to this Work Order and made part hereof by this reference. The professional services will be performed by the Consultant for the fee schedule set forth in Exhibit B (Fee Schedule), attached to this Work Order and made a part hereof by this reference. The Consultant will perform the professional services within the timeframe more particularly set forth in Exhibit C (Time Schedule), attached to this Work Order and made a part hereof by this reference all in accordance with the terms and provisions set forth in the Agreement. Pursuant to paragraph 1.4 of the Agreement, nothing contained in any Work Order shall conflict with the terms of the Agreement and the terms of the Agreement shall be deemed to be incorporated in each individual Work Order as if fully set forth herein. IN WITNESS WHEREOF, the parties hereto have executed this Work Order as of the date first written above. "h1M�5s" CONSULTANT: By: Matthew Shelton Print Name: BOARD OF COUNTY COMMISSIONERS OF INDIAN RIVER COUNTY: Josep arman , Chairrn . /*.. Title: Project Manager BCC Approved Date: December 6_} 222 Attest: Jeffrey R. Smith, Clerk of Court and Comptroller BY: tkk4,--,� Deputy Clerk Approved: Approved as to form and legal sufficiency: Jason . Bro n, County Administrator Dylan T. Reingold, County Attorney "icl n: tv irv: I Iu:) ni" c), j Z16 19�)10 Alow I S:Jlbivil.31 dt ftv) 1 311 1J Oiloi ��Iltul -C, ;i 'jW W A gvrjdG n'.'2 rt` t11t Nivl0.le2lWM0:)'n AU;'j:) V� ORAOS YT14(JO:) RW�,i VA1614t 40 ;qmrslA, Mill! :916C, bila nuo:) lc- Ala.12, jlli vs rljL -,;Z, 11A 19!3 ii as til-joi Q1 RG k.tk-,4,,r6r:,qA f., ;-.� 1?. "i" b9.;tit 4" "yl I I VVI. 3k sj fl , J., f'j ae,-V. 1.:Id V.1 j �,ril Ylvuo—i ,`—vll "IfIlUll "icl n: tv irv: I Iu:) ni" c), j Z16 19�)10 Alow I S:Jlbivil.31 dt ftv) 1 311 1J Oiloi ��Iltul -C, ;i 'jW W A gvrjdG n'.'2 rt` t11t Nivl0.le2lWM0:)'n AU;'j:) V� ORAOS YT14(JO:) RW�,i VA1614t 40 ;qmrslA, Mill! :916C, bila nuo:) lc- Ala.12, jlli vs rljL -,;Z, 11A 19!3 ii as til-joi Q1 RG k.tk-,4,,r6r:,qA OTETRA TECH November 8, 2022 Eric Charest Indian River County Public Works — Coastal Division 1801 27th Street Vero Beach, FL 32960-3388 Email: echarest ,ircgov.com Subject: Proposal to Indian River County for Development of ArcNLET Model Dear Mr. Charest: Tetra Tech, Inc. (Tetra Tech) is pleased to provide Indian River County (IRC) with this proposal for services to provide an ArcGIS Nitrogen Load Estimation Tool (ArcNLET) model for the unincorporated area of the Indian River Lagoon (IRL) basin in IRC. BACKGROUND IRC is located along the IRL, which is one of the nation's most ecologically diverse estuaries and an important ecosystem in the state of Florida. The local governments and state agencies have been working together to restore this system, which has been impaired by excessive nutrient inputs that are causing algal blooms and low dissolved oxygen conditions. One restoration element for the IRL is the basin management action plan (BMAP) that outlines projects that have been or will be implemented in the near future. In February 2021, the Central IRL BMAP was finalized and outlined requirements for IRC to fulfill nutrient reductions. Septic - to -sewer projects account for a significant reduction in nitrogen load to the IRL. The Florida Department of Environmental Protection (DEP) uses the ArcNLET model to quantify nitrogen load reductions to the IRL from septic -to -sewer conversion projects. SCOPE OF WORK Task 1. Collect Data Needed for ArcNLET Modeling Tetra Tech will work with IRC to gather the data needed for the ArcNLET model. The model is an ArcGIS extension that is dependent on good, local data to provide the best estimates of the nitrogen loading from each septic system within the County. These data include geographic information system (GIS) coverages with the exact location (or parcel) of the septic systems; detailed local waterbodies with streams, ditches, creeks, canals, and lakes; topography; and soils. In addition, water quality data for IRC, specifically groundwater data, are helpful to adjust the default model parameters to match local conditions. Tetra Tech will gather available water quality data from IRC as well as the St. Johns River Water Management District (SJRWMD). Tetra Tech, Inc. 1353 N Courtenay Pkwy, Suite S I Merritt Island, FL 32953 Tel 321.636.6470 Fax 321.636.6473 www tca atech.com Mr. Eric Charest November 8, 2022 Page 2 of 4 Tetra Tech will review the available data and provide input to IRC on any data gaps that could affect the model results. Task 2. Develop ArcNLET Model and Conduct Modeling Using the data gathered in Task 1, Tetra Tech will develop an ArcNLET model that encompasses the entire IRL Basin within unincorporated IRC. The ArcGIS files will be incorporated into the model and the available water quality data will be used to adjust the model parameters. The model will then be run to determine the nitrogen loading impacts from the septic system to the surface waterbodies within IRC. Task 3. Conduct Sensitivity Analysis for Nitrogen Load Estimate Tetra Tech will investigate the sensitivity in the nitrogen load estimates from the ArcNLET model by providing probability density functions of the load estimates. This information will help IRC to understand the minimum, maximum, and average nitrogen load estimates to help with identification of future septic to sewer projects. Task 4. Prepare Draft Report Tetra Tech will prepare a draft report that summarizes the nitrogen loading from septic systems to surface waterbodies for each arealbasin of IRC and include a spreadsheet/database that shows pollutant loading estimates per parcel. The report will also include the results of the sensitivity analysis to help IRC understand the range of loading estimates. The draft report will be provided as a Word document to IRC for review. Task 5. Prepare Final Report Tetra Tech will prepare a final report that incorporates the comments received from IRC on the draft report in Task 4. The final report will be provided to IRC as both a Word document and PDF. Task 6. Communication and Meetings Throughout the project, Tetra Tech will communicate with IRC to ensure the best data are incorporated into the ArcNLET model and to keep IRC updated on the project status. An in- person meeting will be held to review the draft report and model results with IRC to obtain input for the final report. PROJECT SCHEDULE The approximate duration noted for each task is based on our current understanding and best estimates of time required to perform the basic services and may be subject to change upon agreement between IRC and Tetra Tech. Task Timeline Notice to Proceed NTP November 10, 2022 IRC Provides All Data November 18, 2022 TETRA TECH Mr. Eric Charest November 8, 2022 Page 3 of 4 Task Timeline Submit Draft ArcNLET Model Report December 28, 2022 Comments Returned from IRC January 3, 2023 Submit Final ArcNLET Model Report January 6, 2023 ASSUMPTIONS Tetra Tech's scope of services and project costs developed with the following assumptions: • IRC will provide the available GIS files and water quality data needed to develop the ArcNLET model. • To meet IRC's January 9, 2023, deadline, an expedited review schedule is required. IRC will provide input on the draft report within three days of receiving the report from Tetra Tech. • Additional restrictions or limitations as a result of COVID-19, weather, or other unforeseen circumstances will not inhibit Tetra Techs level of effort or schedule. PROJECT COST The estimated costs are based on our current understanding of the project requirements and best estimates of level of effort required to perform the basic services and may be subject to change upon agreement between IRC and Tetra Tech. Our Time and Materials price proposal includes labor hours and travel costs in the amount of $45,867, as outlined in Table 1. Project budgets may be moved from one task to another to accommodate IRC needs. Tetra Tech will invoice IRC each month for services rendered during the previous calendar month based on work completed for each task. Tetra Tech shall be paid for all invoices within 30 days of an approved submittal. PERIOD OF PERFORMANCE Tetra Tech anticipates commencing project activities upon receipt of a task order authorization from IRC. This project is anticipated to be completed by January 6, 2023 but may be extended to accommodate additional report edits after the January 9, 2023 deadline. Tetra Tech looks forward to working with you on this project. We are available to discuss our approach with you in detail at your convenience. Should you have any questions regarding this proposal, please contact me at (321) 636-6470. Sincerely, Matthew D. Shelton Project Manager Cc: Marcy Frick, Tetra Tech Erin Lincoln, Tetra Tech TETRA TECH Table 1 Task 1 Task 2 Task Task 4 Task 5 Task 6 O TETRA TEC H,INC. Organize Data Needed Develop ArcNLET Conduct Sensitivity for Arc NLET Model and Conduct Analysis for Nitrogen Communication and Modeling Modelin Load Estimate Prepare Draft Report Pre are Final Re ort Meetings TOTAL DESCRIPTION Units $ Units $ Units $ Units $ Units $ Units $ Units $ Tetra Tech Inc. Labor Employee Name Category Rate Shelton, Matthew Project Manager $194.00 4.0 $ 776.00 8.0 $ 1,552.00 2.0 $ 388.00 5.0 $ 970.00 r 5.0 $ 970.00 12.0 $ 2,328.00 36.0 $ 6,984.00 Frick Marcy Scientist VI $200.00 - $ - 2.0 $ 400.00 2.0 $ 400.00 10.0 $ 2,000.00 5.0 $ 1,000.00 12.0 $ 2,400.00 31.0 $ 6,200.00 Plis, Mykhaylo Sr, GISAnalyst $139.00 10.0 $ 1,390.00 45.0 $ 6,255.00 25.0 $ 3.475.00 20.0 $ 2,780.00 10.0 $ 1,390.00 12.0 $ 1,668.00 122.0 $ 16,958.00 Rinne, Andrea GIS Project Analyst $110.00 10.0 $ 1,100.00 55.0 $ 6,050.00 15.0 $ 1,650.00 30.0 $3,300.00 10.0 $ 1,100.00 - $ - 120.0 $ 13,200.00 Leonard, Morgan Engineer Ii $93.00 5.0 $ 465.00 - $ - - $ - 5.0 $ 46500 5.0 $ 465.00 - $ - 15.0 $ 1,395.00 Keller, Francis Sr. Project Administrator $105.00 1.0 $ 105.00 1.0 $ 105.00 1.0 $ 105.00 1.0 $ 105.00 1.0 $ 10500 1.0 $ 105.00 6.0 $ 630.00 Total Labor r 30.0 $3,836.00 r 111.0 $14,362.00 r 45.0 $6,018.00 r 71.0 $9,620.00 36.0 $5,030.00 37.0 $6,501.00 330.0 ' 45,367.00 Fee to Subs 0.0% Total Subcontractor $ $ $ $ $ $ $ Tetra Tech Inc.Travel Travel to IRC $ - $ - $ - $ - $ - $ 500.00 $ 500.00 G&A to Tra%el 0.00% $ $ $ $ $ $ $ Fee to Trawl 091, $ $ $ $ $ $ $ Total Travel $ - $ - $ - $ - $ - $ 500.00 $ 500.00 Total Tetra Tech Inc. Expenses Travel and ODCs $ $ $ $ $ $ 500.00 500.00 TOTAL Mr $3,836.00 $14,362.00 $6 oi8.o $9,620.00 $5,030-00 001.00 $45,867.00