Square Foot Gardening Forum
[table bgcolor=#000000 height=275][tr][td]

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.


[/td][/tr][/table]
Search
 
 

Display results as :
 

 


Rechercher Advanced Search

Latest topics
» Northern California & Coastal Valleys - What are you doing this month?
by sanderson Today at 2:26 am

» Hello from Gilbert, AZ
by LizDTM Today at 12:33 am

» How's the Weather Where You're At?
by LizDTM Today at 12:22 am

» What are you eating from your garden today?
by brianj555 Yesterday at 8:47 pm

» A great offer for a local SFG,er
by jimmy cee Yesterday at 8:40 pm

» Garlic Growing Lovers
by Turan Yesterday at 5:14 pm

» Lower south Oct 2017
by brianj555 Yesterday at 5:02 pm

» Sowing Experiment! Anyone Tried This?
by brianj555 Yesterday at 4:50 pm

» Thumbs Up????
by brianj555 Yesterday at 4:47 pm

» BOOK GIVEAWAY - ENDS 10/20/17
by CapeCoddess Yesterday at 3:48 pm

» Turan in the Western Mountains
by countrynaturals Yesterday at 3:37 pm

» Third Year SFG in Canada
by countrynaturals Yesterday at 3:34 pm

» Gardening & Homesteading Skills Summit REGISTER NOW!
by countrynaturals Yesterday at 3:28 pm

» Carrot Week 2017!
by Turan Yesterday at 12:01 pm

» Hello from West Coast Of Scotland
by walshevak Yesterday at 11:44 am

» Gardening in Central Pennsylvania, 3rd year SFG
by sanderson Yesterday at 12:17 am

» Today's Harvest
by brianj555 10/16/2017, 8:21 pm

» new greenhouse got drafted
by Scorpio Rising 10/16/2017, 8:08 pm

» Monarch Supporter
by Scorpio Rising 10/16/2017, 7:55 pm

» New England October 2017
by countrynaturals 10/16/2017, 1:09 pm

» October Avatar: Don't Fence Me In
by trolleydriver 10/16/2017, 11:45 am

» Does MM improve with age?
by countrynaturals 10/15/2017, 3:51 pm

» TrolleyDriver's Compost Thermometer
by trolleydriver 10/15/2017, 3:28 pm

» Butterfly Junction
by countrynaturals 10/15/2017, 11:34 am

» Leaf-Footed squash bugs
by sanderson 10/14/2017, 11:21 pm

» N & C Midwest: October 2017!
by Scorpio Rising 10/14/2017, 9:12 pm

» Tomato Questions
by Scorpio Rising 10/14/2017, 9:06 pm

» large plant ID stakes
by has55 10/14/2017, 4:02 pm

» 2017 SFG in Brooks, Ga
by sanderson 10/14/2017, 3:12 am

» First time growing corn
by sanderson 10/14/2017, 3:07 am

Google

Search SFG Forum

Pressure Treated Lumber

View previous topic View next topic Go down

Pressure Treated Lumber

Post  timwardell on 3/30/2010, 11:25 pm

In another thread the subject of pressure treated lumber came up. I thought others might have similar questions so I'm posting this as it's own topic.

Here's a great PDF from the US Dept. of Agriculture that explains what is used in pressure treated wood.
http://www.fpl.fs.fed.us/documnts/techline/whats-in-that-pressure-treated-wood.pdf

Another site with useful information is:
http://www.naturalhandyman.com/iip/infxtra/infpre.html - which also contains some safety info regarding the handling and use of pressure treated wood. The same site also states:
Until 2003, the preservative most commonly used in residential pressure-treated lumber was chromated copper arsenate (CCA), an extremely toxic chemical. Remember "Arsenic and Old Lace"? How about that old box of rat poison you have lurking in the garage? CCA is so toxic that the Environmental Protection Agency, over 20 years ago, imposed strict guidelines regarding the manufacturing practices of companies using CCA.
...Extensive studies were done since the mid 1980's concerning the potential dangers of pressure-treated wood. And rightfully so! Large volumes of CCA were being used, and the treated wood products were beginning to be widely distributed, justifying the need for some hard research.
The research was mixed, but the typical hysteria ensued as attorneys and plaintiffs lined up to claim damages from exposure to CCA. In the end, the industry agreed to voluntarily eliminate use of CCA for residential use. Your local home store or lumberyard is now selling lumber treated with (hopefully) less toxic alternatives... amine copper quat (ACQ) and copper azone (CA)... though you may find other chemical combinations in specific areas. CCA is still being used in certain marine and industrial applications since it is still the best preservative available at the present time.
Whether these new chemicals will turn out to be less hazardous in the long term is anyone's guess.

If you want still more data, the writer of this article tested soil samples from her pressure treated raised beds to find out if there were any traces of toxic chemicals - http://www.finegardening.com/design/articles/pressure-treated-wood-in-beds.aspx
So how much arsenic leaches into the soil from CCA lumber? More to the point, how much gets taken up by vegetables? And how much winds up in the mouths of children? There have been a lot of studies looking at the first two issues, but in trying to organize the facts into meaningful information, I discovered definitive answers can be elusive. I can’t tell you whether or not you should use pressure-treated wood. What I can do is explain the results of pertinent studies and give you the information you need to decide for yourself.
avatar
timwardell

Certified SFG Instructor

Male Posts : 778
Join date : 2010-03-02
Location : Frisco, Texas

View user profile http://www.timwardell.com/

Back to top Go down

Re: Pressure Treated Lumber

Post  herbarium on 3/30/2010, 11:53 pm

I wonder if any studies have been done on the impact of pressure treated wood on soil organisms. I would suspect that pressure treated wood damages soil life which in turn damages the soil. That is another reason I would not want pressure treated wood in my garden. Same goes for railroad ties.

herbarium

Certified SFG Instructor

Female Posts : 150
Join date : 2010-03-04
Age : 59
Location : Bountiful, Utah Zone 6

View user profile http://gardeninspire.com

Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum