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Composted Derivatives

 
  
 
2.4.2
Aluminum Sulfate
Commercial grade.
2.4.3
Sulfur
100 percent elemental
2.4.4
Iron
100 percent elemental
2.4.5
Peat
Natural product of [peat moss] derived from a freshwater site and
conforming to [ASTM D 4427] [as modified herein].  Shred and granulate peat
to pass a 12.5 mm 1/2 inch mesh screen and condition in storage pile for
minimum 6 months after excavation.
2.4.6
Sand
Clean and free of materials harmful to plants.
2.4.7
Perlite
Horticultural grade.
2.4.8
Composted Derivatives
Ground bark, nitrolized sawdust, humus or other green wood waste material
free of stones, sticks, and soil stabilized with nitrogen and having the
following properties:
2.4.8.1
Particle Size
Minimum percent by weight passing:
4.75 mmNo. 4 mesh screen
95
2.36 mmNo. 8 mesh screen
80
2.4.8.2
Nitrogen Content
Minimum percent based on dry weight:
Fir Sawdust
0.7
Fir or Pine Bark
1.0
2.4.9
Gypsum
Coarsely ground gypsum comprised of calcium sulfate dihydrate 91 percent,
calcium 22 percent, sulfur 17 percent; minimum 96 percent passing through
850 micrometers 20 mesh screen, 100 percent passing thru 970 micrometers 16
mesh screen.
2.4.10
Calcined Clay
Calcined clay shall be granular particles produced from montmorillonite
clay calcined to a minimum temperature of 650 degrees C. 1200 degrees F.
Gradation:  A minimum 90 percent shall pass a 2.36 mm No. 8 sieve; a
SECTION 02923
Page 10


   


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