Weyerhaeuser Co HG Chlor Alk

Facility Site ID: 28 Cleanup Site ID: 2272

Site Information

Read the 2015 review of cleanup site conditions and monitoring

In the mid-1950s, the Weyerhaeuser Company began production of chlorine and caustic for its pulp and paper mills. The production technology used elemental mercury.  Leaks from pumps, valves, and process lines resulted in mercury releases to soils. In the mid-1970s, this production process was replaced.

Over time, Weyerhaeuser has removed mercury-contaminated soils and monitored groundwater.  It also evaluated possible impacts to the nearby Columbia River.  Ecology found the cleanup complete in 2005.

Axiall Corporation currently operates Eagle US 2 LLC at the site, and leases part of the property to Hasa Inc.

Site use restrictions called institutional controls are in effect

Institutional controls can be fences, signs, or restrictions on how the property is used. For instance, an institutional control may prohibit installing drinking water wells or disturbing a protective cap that isolates contamination. These restrictions keep the contamination contained and keep people from being exposed to the contamination. The controls are usually listed in environmental covenants recorded with the county.

Periodic reviews are required when institutional controls are required at a site. Ecology conducts reviews to make sure the controls remain effective and the cleanup still protects human health and the environment. We conduct periodic reviews about every five years.

Environmental Covenant

County Recording #: 3522277
County Recording Date: 5/14/2015

Covenant Restrictions

  • Prohibit Soil Disturbance
  • Restrict Access
  • Restrict All Ground Water Extraction/Well Installation
  • Restrict Land Use
  • Restrictive Signage

Media Restrictions

  • Groundwater
  • Soil
Legal 4
Public Information 1
Document Title Document Date Document Type
Weyerhaeuser Longview Chlor-Alkali Fact Sheet Proposed AO 1037 to implement CAP 2/1/2004 Fact Sheet\Public Notices
Technical Reports 9
Document Title Document Date Document Type
Annual Compliance Monitoring Report (2019 - 2020) 5/12/2020 Performance/Confirmational Monitoring Plan or Report
Annual Compliance Monitoring Report (2018 - 2019) 6/10/2019 Performance/Confirmational Monitoring Plan or Report
Annual Compliance Monitoring Report (2017 - 2018) 5/15/2018 Performance/Confirmational Monitoring Plan or Report
Annual Compliance Monitoring Report (2016 - 2017) 5/31/2017 Performance/Confirmational Monitoring Plan or Report
2015 Weyerhaeuser Longview Chlor-Alkali Periodic Review 7/23/2015 Periodic Review (5 Year)
Weyerhaeuser Longview Chlor Alkali Plant Compliance Monitoring Plan 9/23/2004 Site Specific Technical Document - other
Weyerhaeuer Longview Final Cleanup Action Plan 1/28/2004 Cleanup Action Plan
Weyerhaeuer LongviewChlor-Alkali Final Remedial Investigation 7/25/2001 Remedial Investigation Report
Weyerhaeuser Longview Chlor-Alkali Final Feasibility Study 2/28/2001 Feasibility Study
There may be more documents related to this site. To obtain documents not available electronically, you will need to make a public records request.

Places to see print documents

  • Industrial Section
    300 Desmond Dr SE
    Lacey, 98503-1274
    Please schedule an appointment to view print documents at this location.

Contaminants 1

Contaminant Type
Surface Water
Metals - Metals Priority Pollutants C C
Confirmed Above Cleanup Levels
Below Cleanup Levels
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.