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TETRATECH <br />Mr. Arjuna Weragoda, P.E. <br />Indian River County Department of Utility Services <br />June 2, 2020 <br />Page 5 <br />Task 7A: Capacity Analysis Report (Additional Services) <br />1. Per Chapter 62-600, F.A.C. in accordance with Section V.B of the current permit. Although the <br />WWTF three-month average daily flow has not exceeded 50% of the permitted capacity, due <br />to high organic load that exceeds the design for the WWTF an updated capacity analysis <br />report is required with the permit application. It is believed that this requirement was a result <br />of high loadings that were observed at the WWTF at the time of the previous renewal. <br />Subsequently, IRCDUS has mitigated the source of the high loadings. The influent loadings are <br />now consistent with the original plant design. Therefore, at the FDEP Pre -Application meeting <br />IRCDUS will request that this requirement be removed upon demonstration that the loadings <br />to the facilities are consistent with the original design. If FDEP requires that this permit <br />requirement be met as part of the renewal, Tetra Tech will prepare a Capacity Analysis <br />Report. <br />2. Develop flow projections for the next 10 -years based on historical wastewater flows and <br />population projections provided by IRCDUS. <br />3. Tetra Tech will summarize the finding in a draft technical memorandum. <br />4. Tetra Tech will meet with IRCDUS personnel to review findings. Tetra Tech will prepare and <br />distribute meeting summary to attendees. <br />5. Tetra Tech will finalize the technical memorandum in the Capacity Analysis Report. <br />5. Tetra Tech will prepare a draft Capacity Analysis Report (CAR) Tetra Tech will meet with <br />IRCDUS personnel to review findings. Tetra Tech will prepare and distribute meeting summary <br />to attendees. It is assumed that if required, the Capacity Analysis Report review meeting will <br />occur at the same time as the Operations Maintenance and Performance Report review <br />meeting. <br />6. Tetra Tech will finalize report to be submitted to FDEP. <br />Task 8A: Biosolids Storage Plan (Additional Services) <br />1. IRCDUS does not currently have a Facility Biosolids Storage Plan. IRCDUS West Regional <br />WWTF transfers its biosolids to Indian River County Biosolids Dewatering Facility and has not <br />been required to submit one to FDEP in the past. FDEP has required getting an approved <br />Facility Biosolids Plan on recent permit renewals for other facilities. If required by FDEP, Tetra <br />Tech will assist IRCDUS develop a Facilities Biosolids Plan which will include a summary of the <br />biosolids unit processes, disposal, and process back-up provisions. <br />