DEQ Sets April 14 Meeting about proposed Containment System for Contaminated Groundwater at Arkema, Inc. site

warning: Illegal string offset 'files' in /home/phcag/public_html/modules/upload/upload.module on line 281.

News Release
For release: March 31, 2009
Contacts:
Matt McClincy, Portland Harbor Section, Portland, (503) 229-5538
Marcia Danab, Communications & Outreach, Portland, (503) 229-6488

DEQ Sets April 14 Meeting about proposed Containment System for Contaminated Groundwater at Arkema, Inc. site

Meeting set for 7 p.m. at State Office Building; comments due Monday, April 20

What: The Oregon Department of Environmental Quality will present information and answer questions about proposed actions to prevent chemicals from getting into the Willamette River from the Arkema, Inc. site. The site is located at 6400 N.W. Front Avenue on the west bank of the Willamette River, upstream of the railroad bridge at river mile seven and adjacent to the Portland Harbor Superfund site.  The U.S. Environmental Protection Agency is planning to take action on contaminated sediments adjacent to the site.
 
When: 7 p.m., Tuesday, April 14
 
Where: State Office Building, 800 NE Oregon St., Portland
 
For more information: For a summary of the proposed action go to http://www.deq.state.or.us/nwr/permits/Arkema-GW-SourceControlMeasure-PH.pdf. You also can call Dawn Weinberger at (503) 229-6729 to schedule an appointment to review the proposed action and related documents at the
            DEQ Northwest Region office, 2020 SW Fourth Ave., Suite 400, Portland, OR 97201. 
 
Send comments: Send written comments by 5 p.m., Monday, April 20, 2009, to
            DEQ Project Manager Matt McClincy, at the address above or by e-mail to mcclincy.matt@deq.state.or.us.
 
Background: The DEQ proposed remedy requires Arkema, Inc. to construct a groundwater containment system consisting of a grout slurry wall, and a groundwater extraction and treatment system to prevent the discharge of chemicals in groundwater to the Willamette River.  The proposed slurry wall will be constructed about 30 feet inland from the top of the riverbank.  The wall will be approximately 1,800 feet long and extend from ground surface to bedrock 50 to 80 feet below ground.
 
            Extraction wells behind the wall will pump and treat groundwater and treated to remove chemicals before discharge to the Willamette River under a wastewater discharge permit which will be the subject of a future DEQ public notice.
 
            Historical manufacturing operations at the site began in 1941 and ceased in 2001.  Various chemicals were produced at the facility. The primary groundwater chemicals of concern are chlorobenzene, DDT and isomers, hexavalent chromium, perchlorate, chloride, chloroform and dibenzofurans.