|
Location : Florida, USA
Study
: Preventing the Release of Pole
Treatment Chemicals -EPRI
Reference - 1009819
Dates : September 2003 - 2010
Comprehensive
tests are being carried out by EPRI
(Electric Power Research Institute)
in the USA. EPRI are a highly
respected industry body and funding
for the research is provided by EPRI
and participating organisations.
EPRI Study
Objectives
-
To examine
the effectiveness of
commercially-available methods to
prevent the migration of
preservatives from treated wood
poles
-
To compare
the migration of wood
preservatives from wood poles
treated with different
preservative treatments
Project
Approach
8-foot by
~3- to 5-inch diameter posts
Installed
with butt 2 feet below grade
Lysimeters
below posts to collect rain water
Sampling
of wood, soil, and water
Wood
(initially) - Composite sample for
each post from 4 locations (0 to 1
inch)
Soil
(background) - Composite samples
from 0 to 5 feet below grade at 3
locations
Water
- Approximately
semi-annually at each post -
determined by rainfall amounts and
water levels
Soil and
Wood - Timing to be determined by
water results
Wood
Species and Treatment Levels in the
Study
ACQ (Type
B)
0.60
Douglas
Fir
CCA (Type
C)
0.60
Southern
Yellow Pine
CuNap
0.08
Southern
Yellow Pine
Creosote
9.00
Southern
Yellow Pine
PCP
0.45
Southern
Yellow Pine
Data
Evaluation
Mass
balance of preservatives in each
post
Changes in
wood concentrations over time
Tracking
of water (leachate) concentrations
over time
Measurement of soil concentrations
over time
Comparison
of poles with prevention methods
versus those without
Comparison
of leaching from various treatments
Prevention
Methods Used
BioTrans
Woven Fabric Liner - Woven fabric
wrap with straps
BioTrans
One Piece Field Liner - laminate
sleeve
Fiberglass
Sleeve - Hard fiberglass wrapped
around pole with steel bands
AWPA T1
8.4.3 A - Post-treatment liquid
fixation for CCA posts
Matrix of
Posts Installed with Treatments and
Prevention Methods
|
|
Prevention Methods |
|
Treatment |
None |
Biotrans One Piece Field Liner |
Biotrans
Woven Liner |
NOR
PAC Fiberglass Sleeve |
Liquid Fixation Process |
|
ACQ
|
2 |
|
2 |
2 |
|
|
CCA |
2 |
2 |
2 |
|
1 |
|
CuNap |
2 |
2 |
|
2 |
|
|
PCP |
1 |
1 |
|
1 |
|
|
Creosote |
1 |
1 |
|
1 |
|
|
Chestnut |
3 |
|
|
|
|
Current Status
The EPRI testing
has now been in progress since
September 2003 but no results are
yet forthcoming.
During the
intervening period, the Biotrans
Woven Field Liner has been
superceded by the current One Piece
PPL Field Liner of which an early
prototype is being tested by EPRI.
The One Piece PPL
Field Liner was fitted on six
Southern Pine poles treated with CCA
(2 poles), CuNap (2 poles), PCP (1
pole) & Creosote (1 pole)
|
