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' 2 . 0 ONSHORE MONITORING Included in this section are plans for monitoring two physical attributes of the renourished beach that affect marine turtle nesting, sediment compaction and escarpment formation. Monitoring for compaction and escarpment formation will be conducted in I accordance with the terms and conditions of the U. S . Fish & Wildlife Service (USFWS) Biological Opinion, and will include three years of post-construction monitoring. Also included are proposed provisions for monitoring and evaluating the effects of the proposed project on marine turtle nesting levels and reproductive success . 2 . 1 Sediment Compaction Monitoring Sediment compaction monitoring will be conducted in accordance with the conditions contained in DEP permit No . 0166929-001 -JC and the USFWS Biological Opinion issued for this project. Immediately following the completion of construction; the contractor will be required to till the entire area of fill to a depth of 36 inches , avoiding any sea turtle nests that may have been marked for avoidance . Prior to March 1 of the Ifollowing two years, the protocol outlined below will be followed. Sediment shearing resistance (compaction) [see Nelson, et al . ( 1987) for review] will be Imeasured with a Florida Department of Transportation proving ring penetrometer fitted with a 0 . 2 square inch cone. Compaction will be recorded as the force in pounds per square inch (PSI) required to penetrate 15 cm of sediment with the application of a steady pressure. The protocol for compaction monitoring shall be mutually agreeable to FDEP , USFWS , the Florida Fish and Wildlife . Conservation Commission (FWC) , and the County. At a minimum, the protocol will include the following measures : I Compaction sampling stations shall be located at 500-foot intervals along project the ' ect area. One station shall be at the seaward edge of the dune/bulkhead line (when material ' is placed in this area) and one station shall be midway between the dune line and the high water line (normal wrack line) . IAt each station, the cone penetrometer shall be pushed to a depth of 6 , 12 , and 18 inches three times (three replicates) . Material may be removed from the hole if necessary to I ensure accurate readings of successive levels of sediment. The penetrometer may need to be reset between pushes , especially if sediment layering exists . Layers of highly compact material may lay over less compact layers . Replicates shall be located as close to each I other as possible, without interacting with the previous hole and/or disturbed sediments . The three replicate compaction values for each depth shall be averaged to produce final values for each depth at each station. Reports shall include all 18 values for each transect line , and the final 6 averaged compaction values . If mean sand compaction values at any depth exceed 500 PSI in two or more adjacent stations in any project sector, tilling will be undertaken (outside the nesting season and following consultation with regulatory agencies) to reduce compaction levels . If values exceeding 500 psi are distributed throughout the project area but in no case do those 4