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D. Protection: 1. Do not route construction traffic on top of Coarse Gravel layer once material has been placed. 2. Constructed Coarse Gravel layer shall be maintained to meet the requirements of this Specification until final completion and acceptance of the Work. This shall include all measures to prevent erosion. During seasonal or other extended shutdowns, all exposed surfaces shall be protected as detailed in Article 3.1, PROTECTION OF EXPOSED SURFACES, of this Section. In addition, the Coarse Gravel shall be protected from any contamination that reduces the hydraulic conductivity. Any contaminated material shall be removed and replaced at no cost to the OWNER. 3.12 CONSTRUCTION OF GRANULAR DRAINAGE MATERIAL A. General Requirements: Forward Landfill WMU FU -06 02300 21 EARTHWORK 1. GDM shall be placed and compacted to the lines and grades shown on the Construction Drawings or as required by the DESIGN ENGINEER. 2. The CONTRACTOR shall notify the OWNER at least 3 working days in advance of when the granular drainage material is completed and ready for as -built surveys. The OWNER will survey the top of the GDM within two days of the layer being completed to determine that the required minimum thickness has been achieved. The survey shall be performed in accordance with Section 01410, SURVEYS, and shall provide coordinates and elevations of the surface at the established 75 -foot grid and delineating prominent features such as the edge of GDM. The EARTHWORK CONTRACTOR may use an alternative method for measuring the thickness of the GDM, with prior written approval of the OWNER and QA/QC CONSULTANT. The QA/QC CONSULTANT shall have 2 working days to review survey results and may independently verify survey results. The time taken by the CQA Team in checking and verifying the survey results will be considered included in the total calendar days allotted the EARTHWORK CONTRACTOR before liquidated damages are assessed. The results of the survey shall be provided to the QA/QC CONSULTANT for approval prior to placing the overlying materials. 3. A leak location test will be performed on the geomembrane before and after placement of the granular drainage material and protective operations layer. The GEOSYNTHETICS CONTRACTOR shall be responsible for repairing all identified leaks in the geomembrane prior to placement of the overlying earthwork and geosynthetic materials. The EARTHWORK CONTRACTOR shall be responsible for repairing all identified leaks in the geomembrane following placement of the overlying earthwork and geosynthetic materials. The EARTHWORK CONTRACTOR shall remove all earthwork and geosynthetic materials overlying the geomembrane to the extent required to repair the leak and shall repair all identified leaks in the geomembrane at his sole expense. Following the repair of the leak in the geomembrane, the EARTHWORK CONTRACTOR shall replace all Forward Landfill WMU FU -06 02300 21 EARTHWORK