[CANUFNET] post for forum

[Giedraitis, John]

Trees need oxygen for the roots to respire. The gas displaces the oxygen
and suffocates the tree roots. 
 
John Giedraitis 
Texas Urban Forestry Program Coordinator 
jpg at tfs.tamu.edu 
Texas Forest Service 
301 Tarrow Drive, Suite 364, College Station, TX  77840-7896 
979.458.6650, f 979.458.6655 
Visit us at http://texasforestservice.tamu.edu
<http://texasforestservice.tamu.edu/>  
 
What is the best tree to plant in my yard?
<http://texastreeplanting.tamu.edu>  
Visit http://TexasTreePlanting.tamu.edu
<http://texastreeplanting.tamu.edu>  
 
________________________________

From: canufnet-bounces at list.web.net
[mailto:canufnet-bounces at list.web.net] On Behalf Of
pwynnyczuk at richmondhill.ca
Sent: Wednesday, October 31, 2007 1:45 PM
To: Canadian Urban Forest Network
Subject: Re: [CANUFNET] post for forum
 

Hello, 
My understanding is the roots will likely have been killed by the
effects of the gas on the soil microbes. I'm not a scientist, but
usually there is easier movement of gas/air along the interface between
the soil and roots as there is usually some movement which would prevent
a tight seal. This along with soil contraction when there are drought
conditions would open the soil up for further movement. 
Suggest determining the state of the buds and prepare a valuation for
the tree, wait till next Spring and decide on its fate and subsequent
Gas Company responsibility for the damages, if it does not leaf out.
Tree Ownership will determine who is to pursue the Gas Company. 
Just advice.. 
Regards,
Peter Wynnyczuk 


"Guy Martin" <gbmartin at langleycity.ca> 
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10/31/2007 11:32 AM 
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Subject
[CANUFNET] post for forum
 
 
 



Hi all, 
  
I received a request for service from a resident here in the City of
Langley. There is an A. platanoides in his front yard approx 30 years of
age and in good health...or it was. 
He says it defoliated approximately two months ago. Last night he called
the Natural gas company as he and his neighbors had evidence of a gas
leak in his front yard. They dug up and repaired the leak. He figures
this leak may have been on going for a couple of months, as they smelt
gas of and on over that period. The soil is going to be removed (just
the stuff they excavated) and replaced. When I arrived the smell was
incredible...so much so that I thought it was still leaking but it was
coming from the contaminated soil. I understand that the natural gas
will deplete the soil of oxygen. The actual leak and excavation was/is
approximately 8 meters from the trunk and just outside of the drip line.
My question is what effects will this have on the long term health of
the tree? I am going to investigate into the health of the tree to the
best of my knowledge later in the week but was looking for some insight
on this situation. Any help would be greatly appreciated. 
  
Guy Martin 
Head Gardener/Arborist 
City of Langley 
  
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