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Proctor density in accordance with ASTM D 698. All surfaces to be <br /> filled shall be proof rolled in this manner. <br /> 9.1.3 The foundation areas will be observed by the Engineer during <br /> excavation and proof rolling. Soft and other areas determined <br /> unsuitable by the Engineer shall be overexcavated to the satisfaction <br /> of the Engineer prior to the placement of earth materials. <br /> 9.1.4 Finished prepared surfaces of the foundation shall be protected <br /> against damage by movement of construction equipment, rain, frost <br /> or other causes which could impair the bearing capacity of the <br /> subgrade. As determined by the Engineer, any subgrade material <br /> damaged by any of the causes stated above shall be removed and <br /> the foundation shall be again proof rolled at the expense of the <br /> Contractor. <br /> 9.1.5 If unsuitable soils are found during excavation as determined by the <br /> Engineer, the Contractor shall excavate deeper until suitable <br /> foundation soils and soil densities are found. Contractor shall be <br /> compensated for additional excavation where the depth of suitable <br /> foundation material is significantly below the neat lines shown on <br /> the drawings. <br /> 9.2 DISPOSAL OF EXCAVATED MATERIALS <br /> 9.2.1 Materials removed from the existing embankment fill shall be <br /> segregated and stockpiled as Riprap, Zone 1, or Zone 2 material as <br /> defined in Sections 3, 6.2, 6.3, and 6.7 for future reconstruction of <br /> the embankment. <br /> 9.2.2 Waste materials should be deposited outside the reservoir basin or <br /> within the basin at a location to be designated by the Engineer. It <br /> is anticipated that there will be minimal wasted materials. The <br /> surface of the wasted materials should be left in reasonably smooth <br /> and even conditions, with slopes generally flatter than 4:1. <br /> 9.3 PREPARATION OF STRUCTURAL FOUNDATIONS <br /> SPEC.A- EARTHWORK <br /> PAGE 9 <br />