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Indian River Countv Sector 3 - Beach Restoration Project Additional Services Scope of Work As part of this effort, COASTAL TECH will : • investigate and obtain available "reprints of published journal papers that support or validate the accuracy of SBEACH modeling in predicting the sub-aqueous beach profile change, and/or support the practice of using SBEACH modeling to predict the adjusted equilibrium beach fill profile", • perform a "statistical analysis (following Foster or Dean) to verify if . . . model results are within acceptable limits . " • assess "cross-shore spreading of the Sector 1 &2 constructed beach fill into an equilibrated beach fill profile . . . . given the hurricane impacts of 2004 . . . from analysis of the monitoring data." • "revise Figures A6a and A61i to include the predicted equilibrium profile used in the design and permitting of Sector 1 &2 (ATM, 2002)", • "provide separate figures for the proposed restoration of the 1972 and 1986 beach and dune conditions " with "a vertical marker of the landward edge of hardbottom and . . . the distance from the reference monument" • identify the location of the equilibrium toe of fill (ETOF) in the Project Area . Task le — Storm Damage Reduction Benefit Analysis: COASTAL TECH will conduct a qualitative storm damage reduction benefit analysis using the SBEACH cross-shore model. Up to four (4) different return interval storms (eg . 15-yr, 25-yr, 50-yr, 100-yr) will applied to the representative profiles within the Project Area . The SBEACH model will be applied to assess (i) the limits of erosion for each return interval storm event, and (ii) the number of upland structures impacted with and without the design alternative(s). Task If —Hardbottom Impacts : Based upon the hardbottom maps generated in conjunction with Part 1 services , COASTAL TECH will assess potential impacts of the proposed Project upon existing hardbottom (area) including the area of hardbottom expected to be impacted. COASTAL TECH will revise the Design Document to reflect the updated hardbottom impact analysis . Task lg — Revised Permit Sketches : COASTAL TECH will revise the Permit Sketches to "provide superimposed plots of the 1972 beach-dune profile and the proposed construction template at each FDEP reference monument and note the fill density at that reference monument" with "the landward edge of the exposed hardbottom from the most recent hardbottom mapping", with "a vertical marker of the landward edge of hardbottom and . . . the distance from the reference monument" , and the limits of the adjusted fill as determined from other tasks. The plan views shall include the "ETOF, dune (existing and proposed), MHWL, and structures (existing and proposed)". The cross-sections shall include the "predicted ETOF and the MHW elevation". Task lh — Design Document: COASTAL TECH will revise the Design Document and JCP application to include results of Part 1 and Part 2 work with a recommended design . COASTAL TECH will meet with the COUNTY to present and review the updated Draft Design Document; COASTAL TECH will subsequently make revisions as required by the COUNTY and provide fifteen ( 15 ) copies of the Design Document to the COUNTY. The Design Document will be presented to the Beach Committee by COUNTY staff. Page 12 of 14 June 13. 2007