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AAPTIM January 31, 2023 <br />Page 2 of 6 <br />• Hardbottom edge mapping (R-19.5 to R-40) <br />• Monitoring permanent transects (R-20 to R-40) <br />Task 1A: Scope of Work <br />1) Hardbottom Edge Mapping: <br />APTIM shall map the position of the nearshore hardbottom edge for the Sector 3 Phase 1 project area, <br />including 1000 feet north (updrift), from R-19.5 to R-40, for a length of approximately 3.8 miles. A buoy <br />with a Differential Global Positioning System (DGPS) antenna linked to a topside laptop computer running <br />HYPACK navigational software will be towed by divers to record the position of the nearshore hardbottom <br />edge. The divers will follow the inshore contour of the most prominent hardbottom-sand interface. <br />2) Monitoring Permanent Transects: <br />Thirty (38) permanent transects were established along the length of project influence, which includes <br />1000 feet north (updrift) and 2000 feet south (downdrift). This includes twenty-four (24) biological <br />monitoring transects and fourteen (14) sediment -only transects. Phase 1 monitoring will be conducted <br />from R-20 to R-40 and will include twenty-two (22) permanent transects (15 biological and 7 sediment - <br />only). All transects were established perpendicular to the shoreline and extend from the landward <br />hardbottom edge to a maximum distance of 50 meters seaward. <br />APTIM will conduct the biological survey of the hardbottom using the following methods: <br />1) Quadrat Assessments: Up to nine (9) 0.5- M2 quadrats sampled along each transect to quantify the <br />benthic community. <br />2) Sediment Measurements: Collected using line -intercept and 1-m interval sediment depth <br />measurements. <br />3) Video/Photo Documentation: Collected for the length of each transect. <br />It is anticipated that the effort to delineate the hardbottom edge and monitor the transects will take up <br />to twelve (12) field days based on previous monitoring events. The data will be compiled and incorporated <br />into a GIS database and in situ data will be entered into an Access database. Time to complete data entry, <br />reduction, analyses, and report production is included in the cost estimate to address the data <br />management and reporting requirements for those 12 days of field operations. <br />Task 1A: Deliverable <br />Raw data will be provided to FDEP and the County including a PDF of the scanned datasheets, excel <br />spreadsheets with quadrat data, interval sediment depth measurements and line -intercept data, shapefiles <br />of the hardbottom edge survey, video/photo documentation. Additionally, APTIM will provide a map of the <br />project area and adjacent hardbottom resources with the hardbottom edge delineation and monitoring <br />transects overlaid onto the most recent aerial photography (in digital format). <br />A post -construction biological monitoring report will be generated for submittal to the County and regulatory <br />agencies. <br />Task 1A: Schedule <br />The Year 2 Post -Construction monitoring event will take place during summer 2023. Raw data from field <br />