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2013-163
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2013-163
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Last modified
12/8/2015 9:59:45 AM
Creation date
10/1/2015 5:32:27 AM
Metadata
Fields
Template:
Official Documents
Official Document Type
Work Order
Approved Date
08/20/2013
Control Number
2013-163
Agenda Item Number
12.J.1
Entity Name
MBV Engineering
Subject
Work Order No.8
TMDL Credits for past projects
Area
South County RO Plant, North County RO Plant, West Regional WWTF
Supplemental fields
SmeadsoftID
12165
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approved by FDEP , the proposed permit modifications will provide additional flexibility that <br /> will enable the County to maximize the operational benefits of the generous investments that <br /> have already been made to preserve the Indian River Lagoon. The proposed project will provide <br /> the following changes/improvements : <br /> West Regional WWTF : <br /> 1 . Increase the permitted capacity of surface water discharge to the Lateral D Canal (D- 001 ) <br /> from 4 . 0 MGD to 6 . 0 MGD to match the current permitted plant capacity of 6 . 0 MGD . <br /> 2 . Increase the permitted discharge capacity of the wetland treatment/reuse system (R- 001 ) from <br /> 4 . 0 MGD to 6 . 0 MGD to match the current permitted plant capacity of 6 . 0 MGD . <br /> 3 . Increase the permitted discharge capacity from South Regional WWTF to the wetland <br /> treatment/reuse system (R-001 ) from 2 . 0 MGD to 4 . 0 MGD . <br /> 4 . A single instance of selenium was reported in last permit renewal application. This was likely <br /> sampling error as there were no other reported incidents of selenium before or after this single <br /> sample result. Because of this erroneous sample result, an Administrative Order (AO) was issued <br /> along with the current permit. As part of the permit modification application we will propose to <br /> resolve and remove the AO from the permit, by using subsequent and previous sample results to <br /> substantiate the closure of the Administrative Order. <br /> 5 . Quantify and obtain credit on the permit for the phosphorus and nitrogen treatment that <br /> occurs in the Egret Marsh and PC Main treatment systems that are downstream from the West <br /> Regional WWTF . Historical sampling data will be used to substantiate the credits . <br /> North RO Plant <br /> Quantify and obtain credit on the FDEP permit for the phosphorus and nitrogen treatment that <br /> occurs in the Spoonbill Marsh treatment system located downstream from the North RO Plant. <br /> Historical sampling data will be used to substantiate the credits . <br /> South RO Plant <br /> Quantify and obtain credit on the FDEP permit for the phosphorus and nitrogen treatment that <br /> will occur in the PC South treatment system that will be located downstream from the South RO <br /> Plant. Existing pilot study data will be used to substantiate the credits . <br /> County Wide Long Term Goal for Nitrogen and Phosphorus Reduction/Credit Banking <br /> The ultimate long term goal is to bank nutrient credits for the treatment of nitrogen and <br /> phosphorus in a county wide bank that could be utilized as necessary across all County permits . <br /> Eventually these credits could even be a source of revenue if and when FDEP implements a <br /> water quality credit trading program . These are long term goals because implementation will not <br /> be possible until FDEP (along with stakeholder input) quantifies basin wide goals for nutrient <br /> reduction. FDEP is currently developing Basin Management Action Plans (BMAP) that will <br /> identify specific strategies that will be used to achieve pollution reduction goals . These goals <br /> must then be translated into a maximum amount of pollution that each water body can receive . <br /> Credit banking/trading will be a challenging and long range mission, but if achieved will <br /> stimulate the provision of clean water by enabling emitters in our watershed to work together to <br /> reduce pollution of the Indian River Lagoon in a cost effective way . <br /> If approved by FDEP the proposed permit modifications above on the North RO Plant, South RO <br /> Plant, and West Regional WWTF permits will be a first step towards the ultimate goal of county <br /> wide credit banking and trading, as the County will begin archiving, in a format that is <br /> Page 2 of 4 <br />
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