Facility Site ID: 77751227
Cleanup Site ID: 6660

June 23
12:00 am
July 22
11:59 pm

Public Comment Period

Remedial Investigation Report Available for Review and Comment

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:
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.

Site Description

Chelan Chevron photo courtesy of bing street view
Chelan Chevron photo courtesy of bing street view
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.

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.
No documents found.
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 Office
    1250 W Alder St
    Union Gap, 98903-0009
    Please 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.