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City of Everett 31 00 00 - 3 <br /> Inductive Charging Infrastructure for Everett Transit <br /> 2. Elsewhere, backfill and compact unauthorized excavations with structural fill as <br /> specified herein. <br /> B. Overexcavation: In certain areas where soft spots occur in the subgrade, satisfactory <br /> sub-grade shall be achieved by overexcavation and replacement with structural fill <br /> material or lean mix concrete. <br /> 1. Location and extent of soft spot areas to be verified by Owner's Geotechnical <br /> Consultant in the field. <br /> C. Stability of Excavations: Slope the sides of excavations to comply with local codes and <br /> ordinances having jurisdiction. Shore and brace where sloping is not possible because <br /> of space restrictions or stability of material excavated. Maintain sides and slopes of <br /> excavations in a safe condition until completion of backfilling. <br /> D. Shoring and Bracing: Provide shoring and bracing to comply with local codes and <br /> authorities having jurisdiction. Provide materials for shoring and bracing, such as sheet <br /> piling, uprights, stringers and cross-braces, in good serviceable condition. Maintain <br /> shoring and bracing in excavations regardless of the time period excavations will be <br /> open. Carry down shoring and bracing as the excavation progresses. <br /> E. Dewatering: Prevent surface water and subsurface or ground water from flowing into <br /> excavations and from flooding project site and surrounding area. <br /> 1. Do not allow water to accumulate in excavations. Remove water to prevent softening <br /> of foundation bottoms, undercutting footings and soil changes detrimental to stability <br /> of subgrades and foundations. Provide and maintain pumps, well points, sumps, <br /> suction and discharge lines and other dewatering system components necessary to <br /> convey water away from excavations. <br /> 2. Establish and maintain temporary drainage ditches and other diversions outside <br /> excavation limits for each structure to convey water. Do not use trench excavations <br /> as temporary drainage ditches. <br /> F. Material Storage: Stockpile excavated materials as required. Place, grade, shape and <br /> cover stockpiles for proper drainage and to prevent accumulation of excess moisture. <br /> 1. Locate and retain soil materials away from edge of excavations. <br /> 2. Dispose of excess soil material and waste materials legally off-site. <br /> G. Excavation for Buildings and Retaining Walls <br /> 1. Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10- <br /> foot, and extending a sufficient distance from footings and foundations to permit <br /> placing and removal of concrete formwork, installation of services, other construction, <br /> and inspection. <br /> 2. In excavating for footings and foundations, take care not to disturb the bottom of the <br /> excavation. Excavate by hand to final grade just before concrete reinforcement is <br /> placed. Trim bottoms to required lines and grades to leave solid base to receive <br /> 31 00 00 - 3 EARTHWORK <br />