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Optimum Moisture Content is the moisture content (percent by dry weight) corresponding to the
maximu-rn dry density of the same material as determined by AS M, Standard D 1557-91.
Mois.ure-Sensitive Soil is on -site soil containing more than 5 percent fines (silt- or clay -sized
particles) based on the fraction passing the 3/4-inch sieve.
Structural Fill is fill material placed and compacted in areas which underlie structures or
pavements. It should consist of either On -Site Fill Material or Select Fill Material compacted to
the Percent Compaction specified in Section 4.2.
Foundation -Bearing Soil is the soil on which the ends of piles will be embedded in
5.2 2 Materials
On -Sire Fill:llarerial is the soil obtained at the project site during excavation (following clearing
and stripping) that is free of organic contaminants, perishable material, and Locks or lumps
greater than 6 inches in maximum dimension. The fill material extended 5 to 10 feet from the
rial providing the}' can be appropriately moisture
ground surface can be used as On -Site Fill Mate
conditioned for compaction.
Select Fill.lfarerial is imported soil consisting of clean, free -draining sand and gravel containing
less than 5 percent fines (silt- and clay -sized particles) based on the fraction passing the 14-inch
sieve.
5_2.3 Quality Control
The contractor should be made responsible for quality control of the earthwork. As the
geotechnical engineer provided by the owner, we x:ill observe and test the contractor's work for
conformance with the geotechnical aspects of the plans and specifications. The contractor
should be required to provide us with ever} reasonable facility for checking the workmanship for
conformance. We will prepare a daily record of our observations and tests, which will be made
available to the contractor and to the owner. You may wish to consider making the contractor
responsible for retesting work if it fails to meet the requirements of the plans and specifications,
and for the associated costs of such retesting.
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6021-IW 16011 R057
CM -en 2000 Ktemfeld— Inc