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lochisfCiif . pproft rj 12age B Investigation of the existing nearshore hardbottormreof will be perfonned by experienced marine biologists using underwater video taping at 82 shore -normal transects spaced at 500 feet alongshore and extending along 1,500 Feet transect lines. Additionally, three shore -parallel transects will be run the entire length of the reef structure throughout Sectors 1, 2, 3, and 7 at a spacing that is dependent upon the hardbottom locations within each sector (where the County's aerial photography will be used to determine the final line locations for the shore -parallel transects), The cross -shore and shore -parallel surveys Include coverage for areas that extend 1,000 feet north and 3,000 feet south from the north and soutir Project limits of the three identified beach nourishment Project areas. 'This coverage and work ;plan is in accordance with FIJEP staff recommendations pertaining to the hardbottom mapping and characterization work plan. Approximately 47 miles of bottom surveys will be performed to map locations of specific hardbottom structures, which will include both transect reconnaissance and continuous video 6 coverage. The four diver/marine biologists performing this work will analyze the videos to establish type of hardbottom habitats, typical species lists and relief of the reef/structural features. This scope of work and line density assumes f QPP will eliminate the necessity for side - scan sonar coverage of the nearshore zone. After the area is videotaped, a comprehensive list of fish community classifications will be provided on each hardboitom/reef that is videotaped. FDEP has stated that they may request further investigation of significant hardbottom features identified during the performance of work described in Task 2. Additional work may include supplemental quadrats, sand level/elevation monitoring and/or side -scan surveys. Investigation of each hardbottom/reef will also be completed by establishing eight permanent 1 -square -meter quadrat photographic stations on the selected hardbottom/reefs in the Project areas. Quadrats will be permanently marked by drilling and cementing two 1!/4 -inch PVC pipes into the reef. Each quadrat location will be located using DGPS. Stationary underwater photographs will be taken at each quadrat, during each monitoring event, to document the condition of each hardbottomtreef over the life of the Project. Task 2.3 Reduce DGPS Data and Develop Graphical Outouf Video transects and GPS data will be reduced for the 47 fine -miles of data collected in Task 2.2. ATM, working with CSA, will develop track lines and locations of all identified hardbottom resources. Color graphics and maps of transects, hardbottom features and quadrats will be developed to follow the video and photographic documentation. Task 2A Biological Assessment A biological inventory of hardbottom/reef communities will be conducted on all resources located within the Project's limits. Also, a description of biological/benthfc communities will be presented to identify the nature and abundance of all marine life with the study area. Classification of benthic communities will be performed by obtaining three replicate arab samples (cores, ,petit or full-size ponar grabs) from each sample station. Four stations will be selected in the 'Project areas and two stations outside the Project area to be used as controls. Each grab sample will be sieved through a #30 sieve prior to being placed in double zip -lock bags. Each sample will then be preserved in a 10% buffered formalin solution with Rose Bengal stain to aid in identification. Once samples arrive in the laboratory, they will be sorted and enumerated to the lowest possible taxon by a trained biologist. At each station, limited in sibs water quality measurements will be taken. The parameters measured will include temperature, salinity, pH, dissolved oxygen, and turbidity. Water samples will be collected near the bottom with a nanson bottle and on the surface. �Mnn ae'q tl�llr(�+.-1 �evY/SCGii SII tW INN 1WXW &,