Facility Site ID: 3892 Cleanup Site ID: 5208

Site Description

Kens Auto Wash II - Courtesy of Bing Maps
Kens Auto Wash II - Courtesy of Bing Maps
The site was built in 1988 is currently operating as a service station and carwash and was historically used as a gasoline station.

In 1996, a leak was detected after a tightness test was conducted on a gasoline fuel line to an underground storage tank (UST).  Initial investigations showed that gasoline had leaked to the soil and groundwater.

Cleanup Activities

Kens Auto Wash II - Courtesy of Google Maps
Kens Auto Wash II - Courtesy of Google Maps
To determine the extent and degree of contamination at the site, a consultant was hired to monitor groundwater and characterize the soil.  In late 2000, remedial excavation activities were conducted at the site in an effort to remove petroleum contaminated soil.  A large volume of soil was excavated; however, residual contaminated soil contains high levels of petroleum hydrocarbons, which continues to contaminate groundwater on and offsite. Free petroleum product was detected in one groundwater monitoring well onsite.

In 2003, Ecology and the former site owner entered into an Agreed Order to conduct a Remedial Investigation/Feasibility Study (RI/FS) to compile previously collected sampling data and evaluate site cleanup alternatives.  In 2005, an Interim Action was conducted to decommission the USTs and to remove contaminated soil. In November 2006, the RI/FS was completed.  In 2011, remedial injections, usually an oxygen compound, were performed to address the remaining soil contamination.

In June 2013, a Supplemental Feasibility Study was completed.  In 2013, a new Agreed Order was entered into to implement an Interim Action that calls for the addition of bioremediation compounds to reduce groundwater contaminant concentrations.  Also in 2013, a Supplemental Feasibility Study was conducted and the RI/FS Agreed Order was closed.

In 2015, additional remedial injections were performed under the Interim Action.  Compliance monitoring showed that groundwater was no longer impacted and any remaining petroleum contamination is below state cleanup standards. 

In 2019, soil contamination and the Vapor Intrusion pathway was evaluated. Vapor Intrusion can sometimes happen when chemicals, such as gasoline and diesel, are leaked or spilled until its cleaned up.  Even though petroleum is a liquid, they evaporate easily and become a vapor in the air, often odorless.  As the petroleum moves through soil and groundwater, vapors can enter buildings or structures through openings such as cracks, can make the air unsafe to breathe and potentially cause long-term and serious health issues.  It was determined that any remaining petroleum at the site does not appear to pose a significant risk to existing or future buildings or structures. 

In 2020, Ecology has determined that the cleanup actions performed at the site has shown that the site no longer poses a threat to human health or the environment. 

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.

Legal 7
Document Title Document Date Document Type
Kens Auto Wash II Final PLP Letter 8/9/2018 Final Potentially Liable Person Status Letter
Kens Auto Wash II Final PLP letter 5/18/2018 Final Potentially Liable Person Status Letter
Kens Auto Wash II Interim Action Agreed Order No. DE 10350 12/23/2013 Agreed Order
Kens Auto Wash Notice of Satisfaction of RI/FS AO No. DE 03TCPCR-5763 9/4/2013 Order Notice of Satisfaction/Status
Kens Auto Wash II RI/FS AO No. DE 03TCPCR-5763 10/10/2003 Agreed Order
Kens Auto Wash II PLP ltr 3/3/2003 Final Potentially Liable Person Status Letter
Kens Auto Wash II ENL 9/23/1996 Early Notice Letter
Public Information 4
Document Title Document Date Document Type
Kens Auto Wash II - Delisting Fact Sheet 7/28/2020 Fact Sheet\Public Notices
Kens Auto Wash II Interim Action Agreed Order Fact Sheet 12/23/2013 Fact Sheet\Public Notices
Kens Auto Wash II Public Participation Plan 12/16/2013 Public Participation Plan
Kens Auto Wash II RI/FS AO fact sheet 10/1/2003 Fact Sheet\Public Notices
Technical Reports 18
Document Title Document Date Document Type
Kens Auto Wash II - Soil Vapor Monitoring Memo 3/3/2020 Site Specific Technical Document - other
Kens Auto Wash - Site Characterization Report - Sept 2019 9/24/2019 Site Specific Technical Document - other
Kens Auto Wash II Sampling and Analysis Work Plan 12/17/2018 Sampling and Analysis Plan
Kens Auto Wash II Sampling and Analysis Work Plan 9/27/2018 Sampling and Analysis Plan
Kens Auto Wash II 30 Day Notice of Potential Liability 4/3/2018 Site Specific Administrative Document - other (Administrative correspondence)
Kens Auto Wash II 30 Day Notice of Potential Liability 4/3/2018 Site Specific Administrative Document - other (Administrative correspondence)
Kens Auto Wash II Satisfaction of AO No. 10350 3/5/2018 Site Specific Administrative Document - other (Administrative correspondence)
Kens Auto Wash II Interim Action and GW Monitoring 2013-2014 Annual Report 1/14/2015 Interim Action Documents
Kens Auto Wash II Bioremediation Work Plan 10/14/2013 Interim Action Documents
Kens Auto Wash II Interim Action Plan 6/13/2013 Interim Action Documents
Kens Auto Wash II 2012 Annual Groundwater Monitoring Report 6/13/2013 Groundwater Monitoring Report
Kens Auto Wash II Supplemental Feasibility Study 6/13/2013 Feasibility Study
Kens Auto Wash AO No. DE 03TCPCR-5763 status ltr 6/20/2012 Site Specific Administrative Document - other (Administrative correspondence)
Kens Auto Wash II Bioremediation Data Report 5/16/2012 Remedial Action Report
Kens Auto Wash II Interim Action AO - Exhibit D Regististration with UIC Program ltr 1/24/2011 Site Specific Technical Document - other
Kens Auto Wash II RI/FS 11/14/2006 Remedial Investigation / Feasibility Study
Kens Auto Wash II SHA Results Notification 2/6/1997 Site Specific Administrative Document - other (Administrative correspondence)
Kens Auto Wash II - Site Hazard Assessment 1/16/1997 Site Hazard Assessment Report
Voluntary Cleanup Program 4
Document Title Document Date Document Type
Kens Auto Wash II - No Further Action - GWMR # 5 4/9/2020 VCP Opinion on Site Cleanup – NFA
Kens Auto Wash II - Ecology Opinion on SAP WP 12/19/2018 Voluntary Cleanup Program Opinion – Other
Kens Auto Wash II VCP Application Acceptance Letter 10/10/2018 VCP Administrative Document
Kens Auto Wash II - VCP Opinion on Site Cleanup - Further Action 5/24/2000 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 3

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Metals - Lead RB RB
Non-Halogenated Organics - Benzene RB RB
Non-Halogenated Organics - Petroleum-Gasoline RB RB
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.