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DocuSign Envelope ID:07A4359F-6D47-4987-B1F1-BF667ACBB3BA <br /> EARTH MOVING -312000 <br /> 1. Hand-excavate to indicated lines, cross sections, elevations, and subgrades. Use narrow- <br /> tine spading forks to comb soil and expose roots. Do not break, tear, or chop exposed <br /> roots. Do not use mechanical equipment that rips, tears, or pulls roots. <br /> 2. Do not cut main lateral roots or taproots; cut only smaller roots that interfere with <br /> installation of utilities. <br /> 3.8 SUBGRADE INSPECTION <br /> A. Notify Engineer when excavations have reached required subgrade. <br /> B. If Engineer determines that unsatisfactory soil is present, continue excavation and replace with <br /> compacted backfill or fill material as directed. <br /> C. Proof-roll subgrade below slabs and pavements with a pneumatic-tired and loaded 10-wheel, <br /> tandem-axle dump truck weighing not less than 15 tons (13.6 tonnes) to identify soft pockets <br /> and areas of excess yielding. Do not proof-roll wet or saturated subgrades. <br /> 1. Completely proof-roll subgrade in one direction. Limit vehicle speed to 3 mph (5 km/h). <br /> 2. Excavate soft spots, unsatisfactory soils, and areas of excessive pumping or rutting, as <br /> determined by Engineer, and replace with compacted backfill or fill as directed. <br /> D. Authorized additional excavation and replacement material will be paid for according to <br /> Contract provisions for unit prices. <br /> E. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or <br /> construction activities, as directed by Engineer, without additional compensation. <br /> 3.9 UNAUTHORIZED EXCAVATION <br /> A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation <br /> of concrete foundation or footing to excavation bottom, without altering top elevation. Lean <br /> concrete fill, with 28-day compressive strength of 2500 psi (17.2 MPa), may be used when <br /> approved by Engineer. <br /> 1. Fill unauthorized excavations under other construction, pipe, or conduit as directed by <br /> Engineer. <br /> 3.10 STORAGE OF SOIL MATERIALS <br /> A. Stockpile borrow soil materials and excavated satisfactory soil materials without intermixing. <br /> Place,grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust. <br /> 1. Stockpile soil materials away from edge of excavations. Do not store within drip line of <br /> remaining trees. <br /> Orange County Solid Waste Drainage Repairs DAA 2200365/TRC 017055.0000.0000 <br /> Drainage Repair Project November 2023 <br /> Orange County, NC 312000-8/13 <br />