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Section 02200

    • 8.

      Notify Architect/Engineer of unexpected subsurface conditions and discontinue affected work in area until notified to resume work.

      • C.

        Identify and flag known utility locations. Notify utility company to remove and relocate utilities.

      • D.

        Maintain and protect existing utilities to remain.

      • E.

        Verify foundation or basement walls are braced to support surcharge forces imposed by backfilling operations.

    • 3.02

      SUBSOIL EXCAVATING

    • A.

      Excavate subsoil required for building foundations, piling, construction operations and other Work.

    • B.

      Slope banks to angle ofrepose or less until shored.

    • C.

      Excavation shall not interfere with 45 degree bearing splay of any foundation.

    • D.

      Correct unauthorized excavation at no extra cost to Owner.

    • E.

      Fill over-excavated areas under structure bearing surfaces in accordance with direction by Architect/Engineer.

    • F.

      Stockpile subsoil in area designated on site. Remove excess subsoil not being reused from site.

      • 3.03

        TRENCHING

    • A.

      Excavate for storms sewer, sanitary sewer, electric water, gas and piping to municipal utilities.

      • 8.

        Cut trenches sufficiently wide to enable installation of utilities and allow inspection.

    • C.

      Hand trim excavation and leave free ofloose matter. Hand trim for bell and spigot pipe joints.

    • D.

      Support pipe and conduit during placement and compaction ofbedding fill. Backfill trenches to required contour and elevations.

    • F.

      Place and compact fill materials as for Backfilling.

      • 3.04

        BACKFILLING

  • A.

    Backfill areas to contours and elevations. Use unfrozen and unsaturated materials.

  • B.

    Backfill systematically, as early as possible, to allow maximum time for natural settlement. Do not backfill over porous, wet, frozen or spongy sub grade surfaces.

  • C.

    Place geotextile fabric over unstable subsoil.

  • D.

    Place and compact fill materials in continuous layers not exceeding 8 inches loose depth.

  • E.

    Employ a placement method so not to disturb or damage foundations, foundation perimeter drainage, foundation waterproofing and protective cover, or utilities in trenches.

2 Section 02200

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