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formed a hard compacted crust from traffic, it shall be moistened to <br /> optimum moisture and scarified as required before the succeeding <br /> layer of material is placed. <br /> 10.1.5 The removal of wet or soft materials shall be carried to such depth <br /> as determined by the Engineer to expose firm materials. The <br /> exposed surface shall be scarified or lightly disked in order to <br /> provide an adequate bond for the subsequent layer of fill. <br /> 10.1.6 At the abutments and/or against previously placed or existing fill, <br /> each lift shall be benched into the existing slope to provide a <br /> suitable bond between existing and new materials. Each bench shall <br /> be a minimum of one foot W) wide. <br /> 10.1.7 Materials shall be placed to the lines and grades shown on the <br /> Drawings. <br /> 10.1.8 The in-situ moisture content of the material in the stockpiles or <br /> designated borrow areas may be greater than plus two percent <br /> (+2%) over optimum. If the moisture content exceeds this <br /> allowable limit, the Contractor shall take the appropriate measures <br /> to dry the fill material before placing, including but not limited to (a) <br /> excavating and spreading the material to dry, followed by actual <br /> placement in the new embankments and/or (b) mixing with drier <br /> materials to obtain the required moisture content. <br /> 10.1.9 No earth material shall be placed underwater, in a frozen condition, <br /> or upon frozen soils. <br /> 10.1.10 The Contractor shall utilize suitable equipment to achieve the <br /> compaction required by this specification. Compaction of the <br /> embankment Zone 1 and Zone 2 material shall be accomplished <br /> using a vibratory sheepsfoot roller. <br /> 10.2 ZONE 1 FILL <br /> 10.2.1 Zone 1 fill shall be placed in horizontal loose lifts and compacted to <br /> a minimum of ninety-eight percent (98%) Standard Proctor density <br /> SPEC.A- EARTHWORK <br /> PAGE 11 <br />