Chelan Chevron
Facility Site ID:
77751227
Cleanup Site ID:
6660
Site Description
The Chelan Chevron site is located at 232 East Woodin Avenue, although contamination from diesel and gasoline extends to the west and southwest.
A gasoline station has continuously been present at the Chelan Chevron property since 1931. Chevron U.S.A. Inc. (formerly Standard Oil) owned or leased the station from the early 1950s through 1988. In 1987, a gasoline vent line was discovered to be leaking.
The site is currently on Ecology’s Hazardous Sites List with a ranking of “3”. The Hazardous Sites List is a statewide list of contaminated properties. A rank of "1" is the highest level of concern compared to other sites on the list, and a rank of "5" is the lowest. Sites on the Hazardous Sites List are a priority for Ecology, and have completed a Site Hazard Assessment (SHA). An SHA provides information about the environmental risk of the site. Risk is based on the amount of contaminants, how toxic they are, and how easily they can come in contact with people and the environment.
A gasoline station has continuously been present at the Chelan Chevron property since 1931. Chevron U.S.A. Inc. (formerly Standard Oil) owned or leased the station from the early 1950s through 1988. In 1987, a gasoline vent line was discovered to be leaking.
The site is currently on Ecology’s Hazardous Sites List with a ranking of “3”. The Hazardous Sites List is a statewide list of contaminated properties. A rank of "1" is the highest level of concern compared to other sites on the list, and a rank of "5" is the lowest. Sites on the Hazardous Sites List are a priority for Ecology, and have completed a Site Hazard Assessment (SHA). An SHA provides information about the environmental risk of the site. Risk is based on the amount of contaminants, how toxic they are, and how easily they can come in contact with people and the environment.
Cleanup Activities
The leaking vent line, discovered in 1987, prompted environmental investigations and cleanup, including removal of contaminated soil at the Chevron station property. Both soil and groundwater are contaminated with petroleum products.
As of 2014, the diesel and gasoline has contaminated the shallow groundwater over approximately two acres, covering portions of two city blocks in downtown Chelan and potentially affecting 17 or more properties.
In 2015, vapor intrusion (VI) sampling occurred in a number of buildings that are located along E. Woodin Avenue. Vapor intrusion occurs when volatile organic compounds (VOCs), such as diesel and gasoline, can evaporate and move through the soil as a gas. Under certain conditions, these vapors can make their way indoors, affecting air quality in buildings above ground. Results showed no air quality issues from VI. In 2016, a more focused investigation took place for areas of more significant contamination.
In 2018, a geophysical survey was completed to locate any additional underground storage tanks (USTs) on the west part of the site. More groundwater monitoring wells were also installed and sampled.
As of 2014, the diesel and gasoline has contaminated the shallow groundwater over approximately two acres, covering portions of two city blocks in downtown Chelan and potentially affecting 17 or more properties.
In 2015, vapor intrusion (VI) sampling occurred in a number of buildings that are located along E. Woodin Avenue. Vapor intrusion occurs when volatile organic compounds (VOCs), such as diesel and gasoline, can evaporate and move through the soil as a gas. Under certain conditions, these vapors can make their way indoors, affecting air quality in buildings above ground. Results showed no air quality issues from VI. In 2016, a more focused investigation took place for areas of more significant contamination.
In 2018, a geophysical survey was completed to locate any additional underground storage tanks (USTs) on the west part of the site. More groundwater monitoring wells were also installed and sampled.
Documents 62
Legal 9
| Document Title | Document Date | Document Type |
| Chelan Chevron - Final PLP Letter - Chevron U.S.A. | 4/28/2020 | Final Potentially Liable Person Status Letter |
| Chelan Chevron - combined early notice and 30-day notice of potential liability | 2/12/2020 | Early Notice Letter |
| Chelan Chevron - Final PLP Letter - Frontier Communications | 8/9/2018 | Final Potentially Liable Person Status Letter |
| Chelan Chevron - PLP determination deferred - Frontier Communications | 5/23/2018 | Final Potentially Liable Person Status Letter |
| Chelan Chevron - Supplemental RI/FS Agreed Order DE 10629 | 6/25/2014 | Agreed Order |
| Chelan Chevron - Notice of Satisfaction of Agreed Order DE 02TCPCR-4905 | 9/6/2007 | Agreed Order |
| Chelan Chevron - RIFS Agreed Order DE 02TCPCR-4905 | 10/28/2002 | Agreed Order |
| Chelan Chevron - Final PLP Letter - Chevron Products Company | 5/2/2002 | Final Potentially Liable Person Status Letter |
| Chelan Chevron - Early Notice Letter | 3/12/2002 | Early Notice Letter |
Outreach Information 6
| Document Title | Document Date | Document Type |
| Chelan Chevron Commenting Period Postcard | 6/23/2025 | Fact Sheet\Public Notices |
| Chelan Chevron - Supplemental RI/FS AO Responsiveness Summary | 9/15/2014 | Responsiveness Summary |
| Chelan Chevron - Supplemental RI/FS AO Fact Sheet | 6/25/2014 | Fact Sheet\Public Notices |
| Chelan Chevron - Public Participation Plan | 5/12/2014 | Public Participation Plan |
| Chelan Chevron - Soil Vapor Intrusion Assessment Fact Sheet | 1/21/2014 | Fact Sheet\Public Notices |
| Chelan Chevron - RI/FS fact sheet | 12/1/2003 | Fact Sheet\Public Notices |
Technical Reports 47
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
-
Central Regional Office1250 W Alder StUnion Gap, 98903-0009Please schedule an appointment to view print documents at this location.
Contaminants 3
| Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
|---|---|---|---|---|---|---|
| Non-Halogenated Organics - Benzene | C | C | ||||
| Non-Halogenated Organics - Petroleum-Diesel | C | C | ||||
| Non-Halogenated Organics - Petroleum-Gasoline | C | C |
- 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.
Public Comment Period
Ecology has information to share with you and your neighbors about pollution in your community. Chevron USA Inc is preparing to begin cleanup of the Chelan Chevron site, located at 232 East Woodin Avenue in Chelan, with supervision from Ecology. An investigative report describing the contamination at the site is available.
The Chelan Chevron site has been a gas station since 1931. Over the years, leaks and spills from petroleum contaminated the soil and groundwater. The pollution has spread to nearby properties and is a concern for Lake Chelan, which is only 300 feet away.
Petroleum products contain many chemicals and one of them, benzene, is a known carcinogen. Harmful vapors could enter buildings and impact indoor air quality. Pollution in Lake Chelan could also harm fish and other wildlife.
Ecology is asking for your comments on the Remedial Investigation Report. You are invited to:
- Review the Draft Comprehensive Supplemental Remedial Investigation Report.
- Submit comments to Ecology for consideration. Comments will be accepted June 23, 2025 through July 22, 2025.
The Remedial Investigation and additional documents are available for review (link below). The report is also available for review at the Department of Ecology Union Gap Office, or it can be sent to a specific address by request. For technical questions to John Mefford, Site Manager, at Ecology's Central Regional Office.