3.3
Soil shall be placed in loose lifts that result in a compacted lift thickness no
greater than 8 inches. Compaction shall be performed using a static smooth-
drum roller or padded-foot compactors as specified elsewhere in this Section.
Hand compaction of material shall be used in locations where larger
compaction is inappropriate due to limited area.
CONTRACTOR shall finish each day’s work with a smooth-drum roller to create
a smooth surface, free from ruts or indentations, that will limit moisture
penetration. The area shall be left in a manner to promote runoff at the end of
each day.
Prior to continuing construction from the previous day’s work, CONTRACTOR
shall scarify the surface to provide a bond between the layers.
EXCAVATION BELOW GRADE
A.
Excavations shall be made to the elevations and dimensions shown on the
Drawings. Excavate sufficient material to provide suitable room for
construction providing bracing and support as required. The bottom of the
excavations shall be rendered firm and dry and in all respects acceptable to the
CQA Consultant.
Remove water accumulated in excavations by pumping or other means to
maintain a dry and stable subgrade until earthwork operations are complete.
All dewatering shall be performed at CONTRACTOR’s cost. Pumped water shall
be treated using a sediment control system such as DIRTBAG® by ACF
Environmental or other system approved by the ENGINEER. Treated water
shall be directed to the stormwater basins.
Where the soil subgrade has been softened, eroded, or otherwise disturbed by
flooding, exposure during unfavorable weather, or other causes, it shall be
over-excavated and replaced with suitable material at no cost to OWNER.
When the excavation has reached required depths, ENGINEER shall be notified
and will observe conditions. If, in the opinion of the CQA Consultant, the
material in its undisturbed natural condition, at or below the normal grade of
the excavation as indicated on the Drawings is unsuitable, it shall be removed
and be replaced with suitable material as directed by ENGINEER.
CONTRACTOR shall be responsible for the removal, relocation, and stockpiling
of unsuitable material. Unsuitable material is classified here as stumps,
excessively wet soil, ledge rock, ice, topsoil, subsoil, organics, existing fill, or
other deleterious material.
CONTRACTOR shall exercise care to preserve the material below and beyond
the lines of excavation. If the bottom of an excavation is extended below the
limits shown on the Drawings or specified or directed by ENGINEER, then it
File No. 3066.09 Earthwork 02200 - 7 of 14 December 2017
