Facility Site ID: 1304 Cleanup Site ID: 3653

Cleanup Completed

Environmental cleanup at the Sumner National Auto Parts site is completed. In 2022, Ecology determined that no further action is necessary because the cleanup meets state standards. 

Ecology held a public comment period from September 22 to October 23, 2022, on our proposal to remove the site from the Hazardous Sites List. Ecology received no comments during the comment period and we will remove the site from the list.

Site Description

Excavating contaminated soil.
Excavating contaminated soil.

The site is about 1.5 acres in an area of mixed residential, commercial, and undeveloped properties. It was an auto supply store and an engine rebuild and metal machine shop. The building storage/warehouse was constructed in 1979. A portion of the property is paved with asphalt. Other areas are soil and gravel over soil.

Cleanup

All done. The excavation is backfilled with clean soil.
All done. The excavation is backfilled with clean soil.

Leaks of hazardous chemicals into the soil were likely caused by cleaning and refurbishing engines on a concrete pad, where fluids pooled and spread into the soil.

Contaminants in soil and groundwater included:

  • Petroleum hydrocarbons.
  • BTEX (benzene, toluene, ethylbenzene, and xylene).
  • PAHs (polycyclic aromatic hydrocarbons).
  • Metals.
  • Organic solvents.

Soil excavations in 2017-2018 and 2021 removed about 513 tons of contaminated soil from the site. After the contaminated soil was removed, tests confirmed that contaminant concentrations were below state cleanup levels.

Groundwater monitoring wells were installed in and near areas where the contaminated soil was removed. Groundwater was tested periodically and results confirmed that contaminants were either not present in groundwater or present at concentrations below state cleanup levels.  

Household and public drinking water wells are not likely to have been affected by contamination at the site. 

The cleanup is effective in protecting the health of people and the environment. We determined that no further cleanup action is required.

Ecology held a comment before we considered removing the  site from the Hazardous Sites List.  

Monitoring Groundwater

Drilling to install a groundwater monitoring well.
Drilling to install a groundwater monitoring well.
Groundwater monitoring well used to test groundwater conditions.
Groundwater monitoring well used to test groundwater conditions.

Voluntary Cleanup Program

This site was cleaned up under our Voluntary Cleanup Program, which provides technical help to owners of contaminated sites.

Voluntary Cleanup Program customers pay fees to cover our costs for technical help and reviewing cleanup reports. Sites in this program must meet the same cleanup standards as the sites Ecology manages under legal orders.

Public Information 2
Document Title Document Date Document Type
Sumner National Auto Parts Responsiveness Summary (no comments) 10/27/2022 Responsiveness Summary
Sumner National Auto Parts remove from HSL fact sheet 8/25/2022 Fact Sheet\Public Notices
State Environmental Policy Act 1
Document Title Document Date Document Type
Sumner National Auto Parts - Ecology Comments on Determination of Nonsignificance 4/3/2017 SEPA Documents
Technical Reports 4
Document Title Document Date Document Type
Sumner National Auto Parts - Independent Remedial Action Report 5/19/2021 Site Specific Technical Document - other
Sumner National Auto Parts Independent Remedial Action Report 9/3/2020 Remedial Action Report
Sumner National Auto Parts - Groundwater Monitoring Report 1/16/2019 Groundwater Monitoring Report
Sumner National Auto Parts - Independent Remedial Cleanup Action Work Plan 5/23/2017 Interim Action Documents
Voluntary Cleanup Program 9
Document Title Document Date Document Type
Sumner National Auto Parts - SW1729 - Site No Further Action 2/8/2022 VCP Opinion on Site Cleanup – NFA
Sumner National Auto Parts - Site Manager Change Letter 6/14/2021 VCP Administrative Document
Sumner National Auto Parts - SW1729 - VCP Acceptance 9/23/2020 VCP Administrative Document
Sumner National Auto Parts - SW1729 - VCP Agreement 9/10/2020 VCP Administrative Document
Sumner National Auto Parts - SW1729 - VCP Application 9/10/2020 VCP Administrative Document
Sumner National Auto Parts - SW1547 - VCP Project Termination 3/25/2019 Voluntary Cleanup Program Opinion – Other
Sumner National Auto Parts - SW1547 - VCP Site Status Request 12/12/2018 Voluntary Cleanup Program Opinion – Other
Sumner National Auto Parts - SW1547 - Site FA 7/12/2017 Voluntary Cleanup Program Opinion – Other
Sumner National Auto Parts - SW1547 - Acceptance of VCP Application 9/9/2016 Voluntary Cleanup Program Opinion – Other
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 5

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Halogenated Organics - Halogenated Organics RB B
Metals - Metals Priority Pollutants RB B
Non-Halogenated Organics - Petroleum Products-Unspecified RB B
Non-Halogenated Organics - Non-Halogenated Solvents RB B
Non-Halogenated Organics - Polycyclic Aromatic Hydrocarbons B 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.