SECTION 033000 - CAST-IN-PLACE CONCRETE

Sludge Treatment Project Engineered Container Retrieval and Transfer System December 2011
1. Clearance: 12 inches each side of pipe or conduit or as indicated.
C. Trench Bottoms: Excavate and shape trench bottoms to be uniform and even. Remove
projecting stones and sharp objects along trench subgrade. Allow for pipe bedding as indicated.
1. Excavate trenches six (6) inches deeper than elevation required to allow for bedding
course.
3.6 SUBGRADE INSPECTION
A. Proof-roll subgrade below the building slabs and pavements to identify soft pockets and areas of
excess yielding. Do not proof-roll when subgrade is wet or saturated.
B. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or
construction activities, as directed by Buyer’s Technical Representative, without additional
compensation.
C. Test or inspect subgrade materials as required for compaction requirements as applicable.
3.7 UNAUTHORIZED EXCAVATION
A. Fill unauthorized excavation under foundations or wall footings by extending bottom elevation
of concrete foundation or footing to excavation bottom, without altering top elevation.
Concrete fill, with 28 day compressive strength of 2,500 psi, may be used when approved by
Buyer’s Technical Representative.
1. Fill unauthorized excavations under other construction, pipe, or conduit Controlled
Density Fill and as approved by the Buyer’s Technical Representative.
3.8 STORAGE OF SOIL MATERIALS
A. Stockpile borrow soil materials and excavated soil materials without intermixing. Place, grade,
and shape stockpiles to drain surface water. Cover to prevent windblown dust.
1. Stockpile soil materials at least 2 feet away from edge of excavations.
3.9 UTILITY TRENCH BACKFILL
A. Place backfill on subgrades free of mud, frost, snow, or ice.
B. Place and compact bedding course on trench bottoms. Shape bedding course to provide
continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of
conduits.
C. Trenches under Footings: Backfill trenches excavated directly under footings and to 24 inches
beyond face of footings with Controlled Density Fill (CDF).
Contract 44577 KW Annex - Rev. D 44577-CSI-SPEC-001 312000 - 5