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Indian River County Sector 3 - Beach Restoration Project <br /> Additional Services Scope of Work <br /> Task 2 — Geological Analyzes <br /> Task 2a — Sediment Analysis: <br /> Potential Borrow Area : The COUNTY shall make available cores <br /> previously obtained by the COUNTY to delineate the proposed borrow area. COASTAL <br /> TECH will obtain representative samples from the cores of material proposed to be <br /> dredged and used as fill material. COASTAL TECH will perform Munsell color ("wet <br /> and dry") analysis and compositional analysis to include organic and carbonate content <br /> (via LOI). Samples will be visually inspected to "describe the nature of the carbonate <br /> material (i.e. shell fragments, shell hash, sand sized material, or silt- sized material)". The <br /> COUNTY shall provide COASTAL TECH with ROSS-compatible gINTTM files of the <br /> core logs and gradation data previously performed by Scientific Environmental <br /> Applications, Inc. (SEA) on South Borrow Area cores. <br /> Native Beach: The COUNTY shall provide COASTAL TECH with <br /> ROSS -compatible g�s of gradation data previously performed by SEA on native <br /> beach material. COASTAL TECH will obtain an additional 65 native beach samples <br /> from Sector 3 along thirteen shore-normal transects at R17 , R20, R23 , R26, R29 , R32, <br /> R35, R387 R419 R441 R471 R50 and R53 . Samples will be obtained from the Toe of <br /> Dune, Mid-bene, approximate Mean High Water, approximate Mean Low Water, and <br /> wading depth (--3 ' contour) . COASTAL TECH will conduct gradation analyses and <br /> compositional analyses to determine organic and carbonate contents (via LOI) , and <br /> determine the Munsell Color Code ("wet") for these samples. <br /> Gradation analysis of all sediment samples will be conducted by sieving <br /> and the results plotted using g1Nfr" software. This software generates a gradation curve <br /> identical to USACE ENG Form 2087 . The software plots both a cumulative frequency <br /> distribution curve and a frequency distribution histogram as one diagram. The sieve <br /> analysis shall be conducted in 1/2 phi intervals and one 1/4 screen , using a range of screen <br /> openings capable of accommodating all grain-size classes contained in each sample. A <br /> total of 19 sieves will be used ranging from +4 phi to -4 phi . The gradation plot shall <br /> also include a USC description. If a sample contains fines greater than 12% passing the <br /> #200 sieve, the description will be based upon the visual observations of a qualified <br /> coastal geologist. All granularmetric data will be compiled into gINTTm summary tables <br /> and Excel spreadsheets. These spreadsheets will include size-class information and <br /> descriptive statistics . <br /> Task 2b — Compatibility Analysis: COASTAL TECH will prepare a detailed <br /> assessment of the compatibility of native beach sand with the proposed fill. COASTAL <br /> TECH will prepare a written report of the assessment results to include for native beach <br /> and proposed fill material: <br /> • granularmetric summary table for both the native beach disposal site & the <br /> proposed borrow area material including; "median (d5o), Munsell color, silt <br /> percent and carbonate content", and "cumulative weight retained on sieve" <br /> • "frequency and cumulative frequency plots of each sample" <br /> • "composite statistics" and "a cumulative frequency curve of the composite" , <br /> Page 13 of 14 <br /> lune 13, 2007 <br />