Carbon Tetrachloride Cleanup

[thebigdog]

I have a situation where I have carbon tetrachloride contamination of soil and groundwater on a property where site conditions limit my cleanup options. Depth to groundwater is too shallow to consider air sparging/venting. Surface features ( mainline railroad tracks) prevent pump and treat. Concentrations are too high for bio or augmented bio.

What other options might be available to me? What other treatment options have been demonstrated to be effective for carbon tetrachloride?

 

[Donovoid]

Thebigdog,

What has lead you to believe that your concentrations are too high for an enhanced bio approach? I am aware of several sites that treat either PCE or TCE DNAPL source areas and actually achieve better than expected results because the dechlorinators occupy an ecological niche and outcompete other bateria for food in the high toxicity regions near the DNAPL.

A case study summary on one such TCE site can be found at

http://www.jrwbioremediation.com/PDF/JRW_TAN_051202.pdf

and a detailed powerpoint presentation can be found at

http://www.jrwbioremediation.com/Presentations/DryCleanerPresentation_files/frame.htm

 

[thebigdog]

Thanks. I will check the site out. My concentrations are greater than 500,000 ug/L. I haven't seen much info on bio at those concentrations.

 

[ripsnub]

Have you looked into Oxygen Releasing Compounds such as the products offered by Regenesis. They will do a site evaluation for you and give a recommendation based on site specific data. Check out their site at

http://www.regenesis.com/products/treatable.aspx

This is the link to the constituent treatability charts.

I am currently working on a site with total VOCs of 560,000 ug/L mostly TCE, cisDCE, and VC - so I understand your struggle to find a suitable treatment technology.

good luck.

SW

 

[Donovoid]

ripsnup,

A DOE site at INEEL in Idaho has had fantastic success remediating TCE DNAPL using WilClear lactate concentrate (

http://www.jrwbioremediation.com/WILCLEAR.htm)

A case study can be found at (

http://www.jrwbioremediation.com/Presentations/DryCleanerPresentation_files/frame.htm)

and a write up on the INEEL site (

http://www.inel.gov/featurestories/11-01tce.shtml)

explains the efforts. By the way this site is a 200 ft saturated thickness that starts 200ft below ground surface! They have seen complete remediation of the TCE.