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CONTRACTOR shall _ conduct turbidity monitoring every six (6) hours during pumping operations, upland sand is placed/graded on the beach below the MVM line, or any other in-water work, with the first sample taken within I hour following commencement of said activity, and additionally whenever excessive turbidity plumes or pipeline leaks are observed or reported. The CONTRACTOR shall collect Background and Compliance samples for the beach nourishment site. The Background turbidity sample shall be collected at a point approximately 150 meters (492 feet) offshore, -rf 500 meters ( 1 ,640 feet) up-current from the discharge point v , where upland sand is placed/graded below the MHW line, or any other in-water work. The Background sample shall be collected clearly outside of any project-induced turbidity plume, and shall be collected at mid-depth. The Compliance turbidity sample shall be collected at a point no more than 120 meters (394 feet) offshore, and no more than 1 ,000 meters (3 ,281 feet) down- current from the discharge point, where upland sand is placed/graded below the MHW line, or any other in-water work. The Compliance sample shall be collected within the densest portion of any visible turbidity plume, and shall be collected from the surface and at mid-depth. 13 . 1 . 1 .3 Turbidity Reporting. The CONTRACTOR shall complete the Turbidity Monitoring Report that is provided in Appendix F of the Contract Documents and the CONTRACTOR shall submit the r, Turbidity Monitoring Reports to the COUNTY daily with the Contractor' s Daily Quality Control Report as described in Section 12 of these Technical Specifications. The turbidity data shall be reported in Nephelometric Turbidity Units (NTUs). The CONTRACTOR shall provide the following: a statement describing the methods used in collection, handling, storage, and analysis of the samples; a map indicating the sampling locations; a statement by the individual responsible for the implementation of the sampling program concerning the authenticity, precision, limits of detection and accuracy of the data; the times of the day that the samples were collected; the total water depths at each of the sampling locations; the depth at which each sample was collected; the weather conditions just prior to the sample (e.g. , precipitation, cloud cover, temperature, and wind speed and direction); the tidal stage and direction of flow; and, wave height. 13 . 1 . 1 .4 Excessive Turbidity. In the event that the Compliance turbidity samples exceed the Background turbidity samples by 29 NTUs TECHNICAL AND ENVIRONMENTAL SPECIFICATIONSTS- 10