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Part 3 — Construction — Depending on funding, construction may proceed in phases: The first phase will include construction of the series screening system s concrete treatment channel and concrete skeleton for the screens, at least one 1" diameter self-cleaning trash rake, diversion weirs, a duplex pumping station, piping, and an ATS facility. The second phase will consist of installing the remaining self-cleaning trash rakes and controls in the concrete treatment channel. Projected Nutrient Removal: 1. A similar series screening system exists in the IRFWCD's Main Relief Canal. Based on preliminary operational data, the facility's yearly estimated nutrient removal projections are: total nitrogen removed = 1,300 pounds per year; and total phosphorus removed = 750 pounds per year. Projected nutrient removal rates for a fully built -out similar series screening facility in the South Relief Canal should be near those estimated for the Main Relief Canal facility. The flow in the South Relief Canal is less than that in the Main Relief Canal, but the aquatic plant loads can be almost as great. 2. The County operates a similar ATS system in IRFWCD's southwestern basin. Called Egret Marsh Regional Stormwater Park, the facility has been operating since June 2010 and the yearly estimated nutrient removals for it (based on operational data from June 2010 through August 16, 2010) are: total nitrogen = 6,900 pounds per year; and total phosphorus = 2 700 pounds per year. The proposed PC South ATS is expected to produce similar removal rates (this will be verified by the Part 1 pilot plant study). 3. Total Estimated Nutrient Removal — The total estimated nutrient removal for the full series screening system and the ATS system is. total nitrogen removed = 8,200 pounds per year and total phosphorus removed = 3,450 pounds per year. Project Description: Task .l - Perform Algal Turf Scrubber System Pilot Plant Study - Successfully construct an algal turf scrubber pilot plant on the south bank of the Indian River Farms Water Control District's South Relief Canal, approximately 1 mile west of U.S. Highway No. 1 and operate the pilot plant in accordance with the "Proposal for a Pilot Algal Turf Scrubber (ATS) System for Nitrogen and Phosphorus Removal from Stormwater and the 1 reatrnent and Re - Use of Reverse Osmosis Reject Water — PC -South Algal Turf Scrubber," dated December 15, 2009 (Revised August 19 2010), hereinafter referred to as "the Pilot Study Report" and attached as Exhibit "A"; and gather data as indicated in the Pilot Study Report for a six-month period. Deliverable: A report detailing the pilot plant study with projections of nutrient removals and design data for a full- scale system. Timeline for completion: Begin construction of pilot plant 11/4/2010; Begin six-month monitoring program 1/17/2011; Complete monitoring program 7/17/2011; Complete final report 8/17/2011. Budget Information: Contractual' Installation and operation of the pilot plant study will be contracted to Hydromentia, Inc. for the total amount of $188,000 (FDEP=$94,000/Grantee=$94,000). Task 2 - Phase 1 Final Design, Permitting, Bidding and Award of Construction Contract: (1) Design the PC South project, which includes a full-scale algal turf scrubber (ATS) a series screening system with self-cleaning trash rakes, debris conveyors, pump station associated structures, and facilities. (2) Obtain all permits required for construction of the PC South project (3) Prepare bidding documents (4) Bid the project for construction (5) Award the construction contract. Deliverable: (1) A complete set of construction plans for Phase 1 (2) Copies of all required permits (3) Copy of bidding documents (4) Copy of advertisement for bid Revised 7/10 DEP Agreement LP31010, Attachment A, Page 2 of 4