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2019-051
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Last modified
12/27/2019 12:25:35 PM
Creation date
3/27/2019 10:37:45 AM
Metadata
Fields
Template:
Official Documents
Official Document Type
Work Order
Approved Date
03/26/2019
Control Number
2019-051
Agenda Item Number
12.G.3.
Entity Name
Tetra Tech
Subject
Point Source Facilities Allocations and Canals Reclassification
Project Number
CCNA2018 Work Order 03
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Exhibit A <br />TETRA TECH <br />February 28, 2019 <br />Eric Charest <br />Indian River County Department of Utility Services <br />1801 27th Street <br />Vero Beach, Florida 32960 <br />Email: echarest@ircgov.com <br />Subject: Proposal to Indian River County Department of Utility Services for Point <br />Source Facilities Allocations and Canals Reclassification <br />Dear Mr. Charest: <br />Tetra Tech, Inc. (Tetra Techy is pleased to provide the Indian River County Department of <br />Utility Services (IRCDUS) with this proposal for services to support aggregating the point <br />source National Pollutant Discharge Elimination System (NPDES) facility allocations and <br />reclassifying canals, as needed. <br />BACKGROUND <br />Indian River County is a stakeholder in the Central Indian River Lagoon (IRL) Basin_ <br />Management Action Plan (BMAP). The BMAP was adopted in 2013 and it diad not assign <br />detailed allocations to stormwater. However, the adopted total maximum daily load (TMDL). <br />assigned allocations to the point source NPDES facilities using the 95th percentile of each <br />facility's annual loads from the period of 2000 through 2005 (based on measured monthly flows . . <br />and nutrient concentrations, not the facility design capacity). These point sourceallocations were <br />incorporatedinto each facility. permit. IRCDUS has three facilities within the Central IRL BMAP <br />that discharge to surface waters: within the IRL basin: West Regional Wastewater Treatment <br />Facility (WWT.F), North County Reverse Osmosis (RO) Concentrate Discharge Facility, and <br />South County RO Concentrate Discharge Facility. <br />The Florida Department of Environmental Protection (DEP), is in the process of reevaluating the <br />Central IRL BMAP to create an update for the next steps in BMAP implementation. The Central <br />IRL EMAP will include detailed allocations to the stormwater sources. IRCDUS is interested in <br />evaluating options to aggregate the point source facility allocations to. account for the large <br />nutrient reductions occurring at these facilities and to allow for flexibility in meeting BMAP <br />allocations. <br />The wasteload allocations are set so aggregating the permits gives IRCDUS flexibility in <br />achieving the TMDL. Aggregating the permits would recognize the investment that IRCDUS has <br />made: into their point sources facilities and would allow IRCDUS to keep up with growth and the <br />facilities' hydraulic design capacities. The aggregate permit will be a separate permit from the <br />individual facility permits. <br />Tetra Tech, Inc. <br />J I Riverside Drive, Suite 204, Cocoa, FL 32922 <br />Tel 32 36.6470 Fax 321.63 6.6473 www.t trated7.corn <br />
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