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E. In all roadway and pavement areas,the Contractor shall perform a roll test on the subgrade prior to placing <br /> any portion of the pavement structure. The roll test shall be performed with a fully-loaded tandem axle <br /> truck. Soils which rut or deflect 1.0-inch or more shall be corrected by scarifying,drying,and recompacting <br /> the soils. Subgrade excavation shall only be performed as directed by the Engineer. <br /> F. Subgrade excavation shall be performed only when the Engineer and the Contractor both agree that the <br /> inplace soil cannot be made suitable by scarifying,drying,and recompacting. Such excavation shall be <br /> backfilled with suitable excess common excavation material,stabilizing aggregate,granular borrow or select <br /> granular borrow,as directed by the Engineer. If the Contractor proceeds without approval from the <br /> Engineer,all work and material to restore the roadbed to the proper grade shall be at the Contractor's <br /> expense. <br /> 3.3 EXCAVATION AND EMBANKMENT IN AREAS WITH NO PROPOSED STRUCTURAL IMPROVEMENTS <br /> A. Topsoil or unsuitable material may be used to construct embankments in areas with no structural <br /> improvements. <br /> 3.4 COMPACTION <br /> A. All embankment grading shall be compacted using the Quality Compaction Method. <br /> 3.5 FIELD QUALITY CONTROL <br /> A. Required Inspections: <br /> 1. Areas with Proposed Structural Improvements: <br /> (a) Inspection following the removal of unsuitable material and prior to placement of embankment <br /> material to insure that all topsoil and unsuitable material has been removed,and that the exposed <br /> subgrade has sufficient bearing capacity for the anticipated structural improvement. <br /> B. The Contractor shall notify the Engineer 24-hours prior to completing the removal of topsoil and unsuitable <br /> material in areas with proposed structural improvements to insure that appropriate inspection may be <br /> performed. <br /> C. Samples for testing shall be taken from material at locations approved by the Engineer. All sampling <br /> methods shall be approved by the Engineer. <br /> D. Should any of the specified tests or inspections fail,the Contractor may arrange and pay for additional tests <br /> or inspections as may be necessary to satisfy the Engineer that the specified requirements have been met. <br /> ***END OF SECTION*** <br /> Elk River Landfill, Inc. -R16.115896 EXCAVATION & EMBANKMENT-SITE GRADING <br /> March 2019 PAGE 02310-4 <br /> V122217©Bolton&Menk,Inc.2018,All Rights Reserved <br />