Summary Information
(last updated on: 1/18/2017 11:37:42 AM)
Various chemicals were produced at the facility, which began operations in 1941, including: sodium chlorate, potassium chlorate, chlorine, sodium hydroxide, dichloro-dephenyltrichloroethante (DDT), sodium orthosilicate, sodium hydroxide, magnesium chloride hexahydrate, ammonia, ammonium perchlorate, sodium perchlorate, and hydrochloric acid. Manufacturing operations ceased in 2001, and the plant was decommissioned. Current site operations include the operation, monitoring and maintenance of source control measures which include: stormwater collection and treatment system, groundwater collection and treatment system and temporary soil caps.
Primary site contaminants of concern include: DDT, chlorobenzene, chloroform, hexavalent chromium, perchlorate and chlorinated furans. Project focus since the completion of the remedial investigation in 2006 has been the implementation of upland source control measures to prevent the migration of contaminated stromwater and groundwater to the Willamette River in support of a planned U.S. Environmental Protection Agency early action to remove impacted river sediments adjacent to the site. Construction of a new site-wide stormwater collection and treatment system was completed in 2012, and construction of a groundwater barrier wall and groundwater treatment system was completed in 2013. Current project focus is on the performance of the stormwater and groundwater source control measures and the upland feasibility study to evaluate remedial alternatives for the upland site remedy.
| Site: |
ARKEMA, Inc. (ECSI Site ID: 398) |
CERCLIS (EPA) Id | 009031840 |
| Project Manager: |
Matt McClincy |
Investigative Status: | Listed on the Confirmed Release List or Inventory |
| PM Phone: |
(503) 229-5538
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NPL(National Priority Listing): | No |
| Address: |
6400 NW Front Ave. |
Is this site an Orphan? | No |
| Portland,
97210 |
Is this site a brownfield? | No |
| County: |
MULTNOMAH |
Action Underway or Needed: |
FEASIBILITY STUDY |
| Region: |
Northwest Region |
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Soil-bentonite groundwater cutoff wall construction
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9/27/2012
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Adding bentonite to cutoff wall excavation spoils. Once mixed to approximately 5% bentonite, the soil-bontonite slurry is placed back into the groundwater cutoff wall trench.
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10/9/2012
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Mixing soil and bentonite for groundwater cutoff wall slurry backfill
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8/26/2012
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Excavation of groundwater cutoff wall. Depth to bedrock is approximately 88 feet at this location. Water/bentonite slurry entering trench from pipe keeps trench clear. Smaller trackhoe is mixing excavated soil with bentonite.
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9/10/2012
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Mixing bentonite/water slurry pumped from slurry pond into the groundwater cutoff wall trench as it is excavated.
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9/10/2012
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Construction of stormwater sandfilter basin liner and quality control testing
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7/10/2012
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New stormwater sandfilter
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8/30/2012
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New stormwater detention basin
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8/30/2012
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New stormwater detention basin holding first week of rain after construction completion.
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10/16/2012
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Temporary cap located on the northern end of the site between the new East and West stormwater channels. Orange trackhoe marks the northern extent of the groundwater cutoff wall.
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10/16/2012
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Temporary cap at northern end of site. Trackhoe marks the northern end of the groundwater cutoff wall. East stormwater channel on left of photo. Confluence with West channel on the right. Stormwater detention basin on right edge of photo.
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10/16/2012
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