Stevens Pass Mini Mart Station

Facility Site ID: 56 Cleanup Site ID: 11421

Site Description

The Stevens Pass Ski Area operates on two areas of U.S. Forest Service (Forest Service) land (a total of 2,463 acres), pursuant to a special use permit issued by the Forest Service as well as on a 32-acre privately held parcel referred to as Yodelin.

An April 2010 Phase I environmental site assessment and May 2010 a Phase II assessment reported contamination in two areas, the former Stevens Pass Mini Mart Station site and Stevens Pass Ski Resort Vehicle Maintenance Facility site.

At the Stevens Pass Mini Mart Station site a gas station was constructed on the subject property, along the northern side of Highway 2, in 1960 and it operated until 1971. At one time, a gasoline aboveground storage tank (AST) and an oil AST were located behind the station building. In 1964, five underground storage tanks (USTs) were installed at the station. Two of the tanks contained heating oil, one contained leaded gasoline, one contained unleaded gasoline, and one contained waste oil. All five of these USTs were reportedly removed. The station building was demolished in 1998.
In 1948, the Washington State Department of Transportation (WSDOT) constructed a building to the northeast of the future Mini Mart station area that was used for vehicle maintenance. WSDOT operated the maintenance facility until 1968, when most of the building was demolished. From 1968 to 1980, Stevens Pass used the remaining portion of the building for vehicle maintenance. The remaining building still exists, but is only used by Stevens Pass for Parking and Transit Operations offices and equipment/supply storage.

Cleanup Activities

A remedial action was conducted at the site from August through November 2011. About 17,000 tons of soil were removed from both the southern and northern excavations. Over 400,000 gallons of groundwater within the excavation were treated using carbon adsorption and re-infiltrated onsite.

Contaminated soil remains at several locations adjacent to and underneath structures at this site; these areas have been capped with either 8” concrete or 6” of asphalt. Groundwater monitoring was performed from November 2011 thru August 2012 to confirm cleanup. An environmental covenant has been placed on the property identifying locations on the property impacted with total petroleum hydrocarbons above cleanup levels.

Cleanup Complete

Based upon cleanup activities and the recording of the environmental covenant, Ecology has determined the site is no longer a threat to human health and the environment. Ecology made a no further action determination in March 2013.

Period Review

Periodic reviews are conducted every 5 years by Ecology for sites that have institutional controls. The review is intended to examine the effectiveness of cleanup activities and to assure the continued protection of human health and the environment.

Periodic review results

Based on the site visit conducted in 2018, no repair, maintenance or contingency actions have been required at the site. The excavation conducted during the interim action eliminated the human exposure (ingestion, contact) to contaminated soils. The gravel and concrete caps at the site continue to prevent direct contact with the contaminated soils.

The cleanup action completed at the site is protective of human health and the environment.

Soil cleanup levels have not been met at the site; however, the cleanup action is determined to comply with cleanup standards under WAC 173-340-740(6)(f), since the long-term integrity of the containment system is ensured and the requirements for containment technologies have been met.

The use permit for the site has been fully implemented and is effective in the short term protecting public health and the environment from exposure to hazardous substances and protecting the integrity of the cleanup action.

Based on this five-year review, Ecology has determined that the requirements of the use permit is being followed at the site. No additional remedial actions are required by the property owner. It is the property owner’s responsibility to continue to inspect the site to assure that the integrity of the surface cap is maintained.

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.

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.

Other Upland Instrument

County Recording #:
County Recording Date:

Covenant Restrictions

  • Prohibit Soil Disturbance
  • Restrict All Ground Water Extraction/Well Installation

Media Restrictions

  • Groundwater
  • Soil
Legal 1
Document Title Document Date Document Type
Stevens Pass Ski Resort Amendment for Special Use Authorization 9/18/2012 Environmental Covenant; Alternative Mechanism
Technical Reports 4
Document Title Document Date Document Type
Stevens Pass Mini Mart Periodic Review 9/21/2018 Periodic Review (5 Year)
Stevens Pass Mini Mart and Vehicle Maintenance Site 2018 Periodic Review 6/1/2018 Periodic Review (5 Year)
Stevens Pass GW sampling rpt 10/1/2012 Groundwater Monitoring Report
Stevens Pass Ski Area Remedial Action Report 12/8/2011 Remedial Action Report
Voluntary Cleanup Program 2
Document Title Document Date Document Type
Stevens Pass Mini Mart - VCP Opinion on Site Cleanup - No Further Action 3/14/2012 VCP Opinion on Site Cleanup – NFA
Stevens Pass VCP opinion on planned action 8/18/2011 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

  • Central Regional Office
    1250 W Alder St
    Union Gap, 98903-0009
    Please schedule an appointment to view print documents at this location.

Contaminants 2

Contaminant Type
Surface Water
Non-Halogenated Organics - Petroleum-Diesel RA RB
Non-Halogenated Organics - Petroleum-Gasoline RA RB
Confirmed Above Cleanup Levels
Below Cleanup Levels
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.