3.7
to, stones, sticks, and debris shall be removed by hand and replaced with
compacted earth material as indicated on the Drawings.
Deterioration of the subgrade surface between acceptance of the CQA
Consultant and deployment of the geosynthetic materials is the responsibility
of CONTRACTOR and shall be repaired at no cost to OWNER.
Areas to receive Topsoil shall be inspected and approved by the CQA
Consultant before Topsoil is placed. After Topsoil has been spread and fine-
graded, CONTRACTOR shall remove and dispose of all rubbish, sticks, large
stiff clods, lumps, brush, roots, stumps, litter, stones larger than 3 inches, and
other foreign material from the area to be covered with topsoil.
The Topsoil surface shall be tracked immediately after fine grading and other
preparation has been completed. Tracking is to be performed with bulldozers
operating in the direction of water flow. The tracks of the bulldozers are to
have grousers of sufficient height to leave visible depressions in the subgrade.
The depressions are to be perpendicular to the direction of water flow to
reduce erosion potential until topsoil is placed. During the tracking, all
depressions caused by settlement or tacking shall be filled with additional
topsoil and the surface shall be regraded and tracked until an even finished
grade is created.
SOIL PLACEMENT AND COMPACTION
A.
Unless otherwise shown on the Drawings, Topsoil shall be placed to a
minimum thickness of 4 inches. CONTRACTOR shall exercise care to ensure
that the underlying soil remains intact and does not become mixed with the
Topsoil during placement.
Topsoil shall not be compacted.
Soil shall be placed in loose continuous layers and compacted to the specified
compaction criteria. The loose lift fill thickness shall not exceed 12 inches.
Smaller lift heights may be required to achieve the specified compaction.
Compaction shall be by mechanical means designed specifically for soil
compaction. The CQA Consultant, ENGINEER, or OWNER reserves the right to
disapprove any device of inadequate capacity or, in their opinion of a type
unsuited to the character of material being compacted.
Placed and compacted soil shall be graded to drain and provide a smooth
surface that will readily shed water.
Earth materials containing ice, snow, frozen soil, large rocks, roots, sod,
rubbish and other deleterious or organic material shall not be placed. Frozen
soil shall not be placed as fill, nor shall fill or utilities be placed on frozen soil.
File No. 3066.09 Earthwork 02200 - 9 of 14 December 2017
