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To release this water, the site operator will first open the shut-off valve , then remove one or more weir boards from a single stack as necessary to release the surface layer of the ponded water adjacent to the weirs . To minimize the work required, the operator need only open one-half of a single weir stack (that is , one column of boards) and only to the level to start water flowing over the lowered weir crest. Removal of the weir boards should follow the procedures outlined in Section 2 . 3 . 2 .2 . Only when the flow over the lowered weir crest approaches zero should the operator remove another board . This process should continue one board at a time, until all ponded water drains from the site . The operator should then replace the weir boards following the procedure outlined in Section 2 . 3 .2 . 1 , and close the weir discharge shut-off valve. 4. 0 DIKE INSPECTION REQUIREMENTS As discussed in Chapter 3 .0, to comply with likely requirements of the Environmental Resource Permit (ERP) for the operation of the IR- 14 facility, throughout all phases of dredging and dewatering the contractor shall be responsible for additional inspections of the containment facility related to ensuring the integrity and stability of the containment dikes . The remainder of this chapter details specific inspection requirements . 4 . 1 Critical Inspections The contractor shall perform periodic inspections of the containment dikes to check for certain critical conditions that may require the .implementation of remedial measures . As discussed in Chapter 3 . 0 , all inspections shall be conducted by a qualified geotechnical engineer or engineering technician with specific training and experience in performing inspections of earthen dams , earthen reservoirs, or earthen dredged material containment facilities . As part of his required preconstruction submittals , the contractor must submit the qualifications of the designated dike inspector for review and approval of the FIND or its authorized representative. The contractor shall conduct inspections for the items listed below every week. Any of these conditions shall be considered as indicating a critical condition that requires immediate investigation and may require emergency remedial action . Immediately upon confirming the existence of a critical condition, the contractor must inform the Project Engineer and increase the inspection frequency to a minimum of once daily. The Project Engineer will then immediately notify the Florida Department of Environmental Protection (FDEP) . Within 24 hours of confirming a critical condition, the contractor must submit to the Project Engineer documentation of the inspections and implemented remedial actions . The - 19 -