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 Minimum net retention of active preservative9
Treating
Penetration
Assay
Form of product and
Pentachlorophenol
specifi-
service conditions
Zone
(Fed.Spec.TT-W-570)
cations2/
(AWPA C1
and
others
listed
below)
Poles (cont.)
Utility (cont.)
1.00
--
--
--
--
--
--
C7,C8
20.0
--
0-0.5
Western redcedar,
0.50 or 100
Alaska yellow, and
northern white cedars
C7,C8
Posts (round):
C23
Building 11/
Coastal Douglas-fir
2.50 or
0.25-1.0 12.0
--
--
0.60
--
--
--
0.60
0.60
half of
radius
and 90
Southern and ponderosa
...do...
0.50-2.0 12.0
--
--
0.60
--
--
--
0.60
0.60
pines
Red pine
...do...
0.10-1.6 12.0
--
--
0.60
--
--
--
0.60
0.60
C5
Fence
Douglas-fir, western
0.40 and
0-1.0
6.0
6.0
7.0
0.30
0.38
0.38
0.50
0.40
0.40
100 up
hemlock, and western
larch
to 1.00
Southern, ponderosa,
2.00 or 85
0-1.0
6.0
6.0
7.0
0.30
0.38
0.38
0.50
0.40
0.40
and red pines
Jack Pine
1.50 or 85
0-1.0
6.0
6.0
7.0
0.30
0.38
0.38
0.50
0.40
0.40
Lodgepole pine
1.25 or 85
0-1.0
6.0
6.0
7.0
0.30
0.38
0.38
0.50
0.40
0.40
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