topsoil borrow areas indicated].
2.3.3
Composition
Containing from 5 to 10 percent organic matter as determined by the topsoil
composition tests of the Organic Carbon, 6A, Chemical Analysis Method
described in DOA SSIR 42. Maximum particle size, 19 mm 3/4 inch, with
maximum 3 percent retained on 6 mm 1/4 inch screen. The pH shall be tested
in accordance with ASTM D 4972. Topsoil shall be free of sticks, stones,
roots, and other debris and objectionable materials. Other components
shall conform to the following limits:
Silt
[25-50][7 to 17][_____] percent
Clay
[10-30][4 to 12][_____] percent
Sand
[20-35][70 to 82][_____] percent
pH
[5.5 to 7.0][_____]
Soluble Salts
[600] [_____] ppm maximum
2.4
SOIL CONDITIONERS
**************************************************************************
NOTE: Prior to including these provisions in
project specifications, perform tests of on-site
topsoil to determine its suitability and the
possible need of pH adjusters or soil conditioners.
**************************************************************************
Add conditioners to topsoil as required to bring into compliance with
"composition" standard for topsoil as specified herein.
2.4.1
Lime
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NOTE: Use ASTM C 602 calcium carbonate equivalent
(C.C.E.) as specified in Table 1: for burnt lime,
C.C.E. shall not be less than 140 percent; for
hydrated lime, C.C.E. shall not be less than 110
percent; and for limestone, C.C.E. shall not be less
than 80 percent.
**************************************************************************
Commercial grade [hydrate] [or] [burnt] limestone containing a calcium
carbonate equivalent (C.C.E.) as specified in ASTM C 602 of not less than
[_____] percent.
2.4.2
Aluminum Sulfate
Commercial grade.
2.4.3
Sulfur
100 percent elemental
2.4.4
Iron
100 percent elemental
SECTION 02922
Page 9
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