Chuck Olson Chevrolet 17545 Aurora
17545 Aurora Ave N, Shoreline, WA 98133

Photograph of the showroom and car detailing building (former service shop) at the Site
Please click on the photo for a larger view


The Former Chuck Olson Chevrolet facility is located at 17545 Aurora Avenue North, Shoreline, Washington. The property consists of an operating automobile dealership and service center, currently occupied by Doug’s Northwest Cadillac. Surrounding property use is commercial.

Soil impacted with total petroleum hydrocarbons and volatile organic compounds was discovered in 1997 around the hydraulic cylinder equipment vaults in the former service shop in the building on the east side of the property.


The remediation phase of work was conducted in 1998 and 1999. Pre-remediation excavation work included decommissioning all existing hydraulic equipment, and then rinsing, cleaning, and demolishing the hydraulic equipment vaults.

Soil remediation was accomplished by excavation and subsequent off-site treatment by thermal desorption. A total of 1,213 tons of impacted soil was excavated from nine of the former hydraulic equipment vault areas. No ground water or saturated soil was encountered during excavation activities.

Excavation of impacted soil was limited in some areas by the maximum practical depth of excavation, and/or the proximity of the excavation to structural members of the building, such as footings or load-bearing walls. Three areas of impacted soil remain with petroleum concentrations above the site cleanup levels. The estimated cumulative volume of remaining impacted soil was 195 cubic yards.

Protective capping was considered the remedial action for remaining soil contamination. Asphalt covers the majority of the site that does not fall under the building footprint.


The Former Chuck Olson Chevrolet facility entered into the Department of Ecology’s Voluntary Cleanup Program (VCP) in 1998. Based on the site use, surface cover, and calculated cleanup levels, it was determined that the site was eligible for a ‘No Further Action’ (NFA) determination if a Restrictive Covenant was recorded for the property.

A Restrictive Covenant (also known as an Environmental Covenant) was placed on the property in 1999 to ensure remedy performance and to restrict activities that might result in exposure to contaminants.


A periodic review is conducted every five years following a cleanup action when institutional controls are used as part of the remedy, as required by the Model Toxics Control Act (MTCA). The purpose of the periodic review is to evaluate current site conditions and to ensure continued protection of human health and the environment.


The remedial actions completed at the Site appear to be protective of human health and the environment.

Soil cleanup levels have not been met at the Site; however, the cleanup action was 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 are being met.

The Environmental Covenant for the property is in place and continues to be effective in protecting public health and the environment from exposure to hazardous substances, as well as protecting the integrity of the remedial action.

Based on this periodic review, Ecology has determined that the requirements of the Environmental Covenant continue to be met. No additional cleanup actions are required by the property owner at this time. It is the property owner’s responsibility to continue to inspect the property to assure that the integrity of the remedy is maintained.


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Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 33597945

Cleanup Site ID: 1639

Shoreline, King County

Status: No Further Action   Get definitions of Status terminology

Tamara Welty
Periodic Review Coordinator
(425) 649-7023

Document Repositories:

Northwest Regional Office
3190 160th Ave SE
Bellevue, 98008-5452