Facility Site ID: 35797926 Cleanup Site ID: 4150

Cleanup Completed

Cleanup at the Briggs Nursery site is completed and Ecology will remove the site from the state's Hazardous Sites List in 2019.

Ecology held a public comment period from February 19 to March 21, 2019, on its proposal to remove the site from the Hazardous Sites List. Ecology received three comments during the comment period.  The public comments and Ecology's response to comments are available in the Responsiveness Summary.

Because some contamination remains in the kettles (natural depressions) at the site, an environmental covenant was filed for the kettles in 2008. With the cleanup work completed and an environmental covenant in place, conditions at the site protect people's health and the environment.

Ecology will conduct a periodic review of the site about every five years to ensure that conditions at the site continue to protect human health and the environment. 

RESPONSIVENESS SUMMARY

Site Description

The site is about 120 acres, and it is located north of the intersection of Henderson Blvd and Yelm Highway. The site is the former location of a wholesale nursery in operation since 1912. During the mid-2000s, the nursery moved away and the site is now changing to houses and businesses.

Background And Cleanup

In 2002, Thurston County Health Department on behalf of Ecology decided a study of possible contamination was necessary based on information about pesticide use at the site.

In 2004, Ecology ranked the site as a 2 because dieldrin (a pesticide) levels in some soil samples were above state cleanup levels. A site is ranked based on its potential relative risk compared to other known contaminated sites in the state. Sites are ranked on a scale of 1 to 5 with 1 being the highest potential risk. When the site was ranked, Ecology put the site on the Hazardous Sites List.  

In 2004, Briggs Nursery entered into an Agreed Order (Agreed Order No. 1315) with Ecology to conduct a remedial investigation and feasibility study to find the extent of contamination and plan options for cleanup. As part of the investigation, owners tested soil, sediment, groundwater, and surface water for pesticides, metals, polychlorinated biphenyls (PCBs) and dioxins/furans.

Results of these studies showed there was no contamination of groundwater, or of nearby Ward Lake, from nursery operations.

Some areas at the site had dieldrin and PCBs contaminated soil exceeding state cleanup levels. To clean up the site, owners removed

  • 20,250 tons of dieldrin contaminated soil.
  • 1,811 tons of dieldrin and PCBs contaminated soil.

Following cleanup, concentration of contaminants in soil was below state cleanup levels, except for residual contamination remaining in the bottom of the kettles at the site. Kettle landforms are natural depressions created by melting ice blocks as a glacier retreats.

To eliminate possible exposure to contamination in the kettles, in 2008 an environmental covenant was filed for the site. The covenant restricts public access to the kettles and requires the owner to place fences and signs around the kettles. Thurston County is the current owner of the kettles and it is responsible for maintaining the fences and signs restricting public access to the kettle bottoms.

Ecology reviewed the cleanup work in combination with the environmental covenant that restricts access to the kettles and determined that conditions at the the site are effective in protecting people's health and the environment. Ecology held a public comment period in 2019 to provide an opportunity for the public to comment on the no further action memo and removing the site from the Hazardous Sites List. Ecology will remove the site from the list in 2019.

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 #: 2006-01260074
County Recording Date: 1/26/2006

Covenant Restrictions

  • Ongoing Maintenance of Remedy

Media Restrictions

  • Soil

Environmental Covenant

County Recording #: 3990209
County Recording Date: 2/20/2008

Covenant Restrictions

  • Restrict Land Use
  • Restrictive Signage

Media Restrictions

  • Soil

Environmental Covenant

County Recording #: 3848091
County Recording Date: 7/13/2006

Covenant Restrictions

  • Ongoing Maintenance of Remedy
  • Restrict Access
  • Restrictive Signage

Media Restrictions

  • Soil
Legal 6
Document Title Document Date Document Type
Operating and Maintenance Plan 9/2/2015 Environmental Covenant; Alternative Mechanism
Environmental Covenant 2/7/2008 Environmental Covenant; Alternative Mechanism
Restrictive Covenant for Pumpkins Farm 6/23/2006 Environmental Covenant; Alternative Mechanism
Briggs Nursery EC 5/1/2006 5/1/2006 Environmental Covenant; Alternative Mechanism
2006 Restrictive Covenant, EXhibit A 1/31/2006 Environmental Covenant; Alternative Mechanism
Briggs Nursery Agreed Order 7/15/2004 Agreed Order
Map 2
Public Information 11
Technical Reports 15
Document Title Document Date Document Type
Environmental Deed Restriction 10/1/2019 Performance/Confirmational Monitoring Plan or Report
Briggs Nursery Preventative Maintenance Plan for the Kettles 4/23/2019 Site Specific Technical Document - other
Technical Memo Sub for Cleanup Action Plan and Cleanup Report 12/1/2015 Cleanup Action Plan
Briggs Nursery Cleanup Activity Timeline 12/31/2007 Site Specific Administrative Document - other (Administrative correspondence)
Briggs Nurser Cleanup Activities 1996 - 2007 8/28/2007 Site Specific Administrative Document - other (Administrative correspondence)
Briggs Nursery Interim Action Work Plan Work Area 3 8/9/2007 Interim Action Documents
Briggs Nursery interim Action Work Plan Areas 1 and 2 5/25/2006 Interim Action Documents
Briggs Nursery Draft Remedial Investigation Feasibility Study Report Work Area 1 2/15/2006 Remedial Investigation / Feasibility Study
A letter to Susan Messagee from the City of Olympia 9/19/2005 Site Specific Administrative Document - other (Administrative correspondence)
Briggs Nursery Remedial Investigation Feasibility Study Work Plan 4/4/2005 Remedial Investigation Work Plan
Briggs Nursery Interim Action Work Plan Area 1 and 2 4/4/2005 Interim Action Documents
Briggs Nursery Final Remedial Investigation Feasibility Study Work Plan 4/4/2005 Remedial Investigation Work Plan
BRIGGS NURSERY Site Hazard Assessment 8/1/2004 Site Hazard Assessment Report
Briggs Debris Field Closure Report 2/5/2003 Site Specific Technical Document - other
BRIGGS NURSERY -- SHA 8/1/2002 Site Hazard Assessment Report
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

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

Contaminants 4

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Halogenated Organics - Polychlorinated biPhenyls (PCB) RB RB
Pesticides - Halogenated Pesticides RB RB
Halogenated Organics - Dioxins/Furans RB
Pesticides - Pesticides-Unspecified RB B
S
Suspected
C
Confirmed Above Cleanup Levels
B
Below Cleanup Levels
RA
Remediated-Above
RB
Remediated-Below
R
Remediated
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.