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Alkali Lake Disposal Site

Summary Information
(last updated on: 10/22/2019 9:00:05 AM)
The Alkali Lake Chemical Waste Disposal site is in Lake County, Oregon, about 60 miles north of Lakeview. The main disposal area occupies about 10 acres just west of Alkali Lake. The area is dry most of the year, as are most nearby surface water bodies. About 25,000 drums of herbicide manufacturing waste were disposed of here between 1969 and 1971. In 1976, the drums were crushed on the site and covered with soil.

Despite the large quantity of toxic materials, the site does not present a significant risk to human health or the environment because the waste has been buried and fenced, and the site is remote--about 30 miles from the nearest town. DEQ maintains more than 50 groundwater monitoring wells in the area to test for contamination. Regular testing since the 1990s shows the contamination remains contained within the original area and is not spreading. DEQ oversaw a risk assessment of the site in 2005, which concluded the site does not present a significant risk to people or wildlife as long as current safeguards are maintained.

Find more information in the Alkali Lake fact sheet.

General Site Information
Site: Alkali Lake Disposal Site (ECSI Site ID: 291) CERCLIS (EPA) Id980511497
Project Manager: Ann Farris Investigative Status:Listed on the Confirmed Release List or Inventory
PM Phone: 503-704-6300 NPL(National Priority Listing):No
Address: 30S/23E/S18 Is this site an Orphan?No
Alkali Lake, 97640 Is this site a brownfield?No
County: LAKE Action Underway or Needed: Periodic Review
Region: Eastern Region Click for more details ...  
Site Documents
Click the link to view the document.
File NameCategory File Size MB Document Date Upload Date
Alkali Lake Risk Assessment (July 2005).pdf Eco/HH Risk Assessments 4.6071 7/26/2005 12/21/2017
Alkali-Lake-Fact-Sheet_2019.10.04.pdf Fact Sheets 0.6195 10/8/2019 10/8/2019
Remediation Alt Rpt 8-15-06.pdf Reports 1.9536 3/10/2009
May 2011 Groundwater Report-Alkali Lake.pdf Reports 1.0728 9/7/2011 8/24/2015
September 2013 groundwater sampling report.pdf Reports 1.7122 8/18/2015 1/6/2017
2016 monitoring and maintenance rpt-complete.pdf Reports 4.1987 10/25/2016 1/6/2017
Record of Decision-2007-04-25-Alkail Lake-with figures.pdf RODs/Staff Reports 2.2923 4/25/2007 10/1/2019

Click on the Photograph to see a larger version.

Soil sample collection
CWDA and Alkali from spoils pile
CWDA and west Alkali Lake
Desert crust and plant community
Groundwater sampling and well maintenance
North depression and west Alkali Lake
North Depression
Soil Treatment Areas
Barbed-wire fence around 10-acre disposal area, Oct. 2019
Inside 10-acre disposal area, Oct. 2019
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Department of Environmental Quality
700 NE Multnomah Street, Suite 600 Portland, OR 97232
Hours: Mon-Fri, 8 a.m.-5 p.m

Email: DEQInfo@deq.state.or.us | Phone: 503-229-5696 | Fax: 503-229-6124

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