2.2
2.3
2.4
STRUCTURAL FILL
A.
Structural Fill shall be used for construction of embankments and general
raises-in-grade. Structural Fill shall be friable soil and shall be free of trash,
ice, snow, tree stumps, roots, and other organic material.
Structural Fill shall contain no stone greater than 8 inches in diameter and
contain no more than 50 percent of the material passing the No. 200 sieve.
Structural Fill placed within 6 inches of geosynthetics shall contain no stone
greater than 1-inch in diameter.
SCREENED TILL
A.
Screened Till shall be used to establish the landfill subgrade beneath the
geomembrane in the secondary liner system and where otherwise indicated on
the Drawings.
The Screened Till shall contain no stone greater than % inches in diameter, and
be free from ice and snow, roots, sod, clay, rubbish and other deleterious
Screened Till shall exhibit a hydraulic conductivity of less than 1 x 10+ cm/sec
when tested in accordance with ASTM D5084. Test specimens shall be
compacted at a moisture content that provides a density no less than 95
percent of the maximum dry density as determined by ASTM D698. Hydraulic
conductivity testing shall be performed at a normal stress of 89 pounds per
square inch (lb/in.?).
Screened Till shall exhibit an internal angle of friction of no less than 30
degrees when tested in accordance with ASTM D3080. Test specimens shall be
compacted at a moisture content and density matching that at which
acceptable hydraulic conductivity tests were performed. Testing shall be
performed at the following normal stresses of 22, 44, and 89 lb/in.2.
DRAINAGE SAND
A.
Drainage Sand shall be used as a soil component of the primary and secondary
liner systems and where otherwise specified on the Drawings.
Drainage Sand shall be free from ice and snow, roots, sod, clay, rubbish and
other deleterious or organic matter meeting the following grain size
requirements:
File No. 3066.09 Earthwork 02200 - 3 of 14 December 2017
