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Indian River County Sector 3 - Beach Restoration Project Additional Services Scope of Work adjacent to transect (within underwater visibility during transect establishment), and changes in benthic landscape along the transect. Voucher sampling of macroalgae shall be conducted as needed to assist with video identification of macroalgae genera. Survey Schedule/Sampling Plan : The field survey will begin as soon as possible after authorization and upon the observance of acceptable water conditions . Based upon past experience with adverse underwater visibility conditions in the Indian River County nearshore region and because of the significant number of transects in the Sector 3 project area it may not be possible to establish and survey all of the proposed transects at the requested level of detail during this 2007 summer season. It is proposed that transects will be established and surveyed in a two-tiered approach, with the first tier including transects at monuments R14.2 * , R181 R22 * , R26, R34, R38 , R42, R501 R54, R60.51 R63 , and R65 . These transects cover the entire north to south extent of the study area plus control/reference area to the south and are set at about 4 ,000 ft intervals . All proposed data sets will be collected along these transects and then the 11 remaining transects at monuments R16.9* , R19 .5 * 9 R241 R28 .51 R32, R36, R409 R44, R48 , R52, and R56 will be established and surveyed as site conditions allow. If weather and underwater visibility do not permit the establishment and data collection along all of the proposed transects in the summer of 2007, with Department approval, the remaining transects will be established and surveyed during the summer of 2008 . With acceptable sea conditions this approach should provide for the timely delivery of a detailed data set for the entire length of the study area to enable the preparation of hard bottom characterization documents in 2007, with additional information for intermediate transects collected at the first available opportunity. Single diver video transects also will be run down the axis of each of the eight proposed pipeline corridors , beginning at the nearshore edge of hard bottom and extending out for from about 300 to 500 in or to the end of the corridor. DGPS diver position fixes will be collected at the beginning and end of these corridor transects and at 20 in intervals along the transects . Divers will collect both oblique and vertical format video data along the corridors to allow for the description of benthic communities within the corridors and the detection of potential pipeline impacts to these communities . If, after completion of the video transects , there is missing video data, CSA INTERNATIONAL will re-film missing data in the study area at no additional cost to the COUNTY. * Transects for R14.2, R16.9 and R19 .5, and R22, are established or are to be established and surveyed under separate authorization for the Sectors 1 and 2 Nearshore Hard Bottom Monitoring Program. Task 2b - Quadrat Sampling: In concert with the fieldwork under Task 2a, CSA INTERNATIONAL shall perform quadrat sampling as described below: During each survey, a 0.25 square meter (0.5 m by 0. 5 m) gridded quadrat will be sampled by the diverlbiologist at a several point-intercept locations along the 180-meter long transects — with approximately 12 quadrats along each transect. The first quadrat will be located at the nearshore hardbottom edge. If the hardbottom edge consists of a Page 6 of 14 June 13, 2007