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shall be held responsible for all mistakes that maybe caused by the loss or disturbance of the project monumentation. Hydrographic surveys shall be performed in accordance with USACE HYDROGRAPHIC SURVEYING document number EM 1110-2- 1003 dated October 1994 (Updated January 1 , 2002). Survey notes shall be reduced to elevations and shall include the date performed, weather conditions, benchmarks and monuments used, name and title of each member of the survey party, and the name of any COUNTY or ENGINEER representative present. Survey notes lacking information, illegible, in error or not in accordance with accepted practices shall be returned to the CONTRACTOR for correction. Surveying instruments shall be checked for adjustment at least once per week and such checks shall be recorded in survey notes and on the quality control sheet. Surveys of the borrow site shall comply with the following requirements: • The survey area shalt extend outside the entire permitted borrow site by a minimum of 500 feet. • Cross-sections of the borrow site shall be surveyed perpendicular to the long axis of the borrow site. • Cross-sections shall be surveyed at 250 foot intervals and shall extend a minimum of 500 feet beyond the boundaries of the borrow site. • All survey drawings shall be at a scale acceptable to the COUNTY. Final plan view drawings shall be submitted both with and without contours. • All drawings shall be submitted in an electronic format acceptable to the COUNTY . 34 . PRE AND POST-CONSTRUCTION BEACH AND OFFSHORE SURVEYS The elevations indicated in the Plans are based on a survey conducted in August 2001 and may not represent accurate beach elevations at the time of construction. Therefore, the CONTRACTOR shall perform a beach profile survey prior to the initiation of construction . The surveys shall be conducted so that the COUNTY may adjust the fill volume as needed at the cross-sections and provide the - CONTRACTOR with a template or pay volume change order if required. Pre-construction surveys shall be conducted by the CONTRACTOR no more than four (4) weeks priorto the commencement of dredging. These pre-construction surveys shall be provided to the COUNTY no less than two (2) weeks ( 14 calendar days) prior to the commencement of dredging so that the design templates may be adjusted by the COUNTY to reflect the pre-construction survey. Post-construction surveys shall be conducted no more than two (2) weeks following completion of dredging. 34. 1 Beach Surveys. Beach profiles shall be conducted by differential leveling techniques from the back beach or dune across the profile to approximately 40 feet seaward ofthe design fill section using laser distance measurement instrumentation or other method approved by the COUNTY. CONTRACTOR shall close all level loops and said closure shall be less than 0.04 feet. This survey work shall be documented in field books with copies supplied to the COUNTY. TECHNICAL AND ENVIRONMENTAL SPECIFICATIONS Rev October 5 . 2007 TS-33