Facility Site ID: 73975762 Cleanup Site ID: 3013

Current Status - July 2021

Cleanup Excavation at the Bothell Landing Site
Cleanup Excavation at the Bothell Landing Site
On June 11, 2018, the Washington Department of Ecology and the City of Bothell have entered into an agreement called an Agreed Order, which requires the City to clean up the Bothell Landing site.

Previously, the City of Bothell completed a Remedial Investigation and Feasibility Study (RI/FS) on August 10, 2017. This study determined the nature and extent of remaining contamination and evaluated possible methods to clean up the site. They also prepared a Draft Cleanup Action Plan describing how they will clean up the site. A comment period was held to get public input on these documents, and Ecology responded to all comments. Interim action soil cleanups were conducted in September and October 2010, October 2013 to May 2014, September 2015, and January 2017. Following the excavations, confirmation samples were taken. Oxygen Release Compound (ORC) was placed in the 2010 excavation. The remedy for the Site is a combination of actions:

• excavation of contaminated soils (already completed as interim actions),
• engineering controls (capping under roadways, already completed),
• institutional controls (environmental covenants restricting access to soil and groundwater), and
• groundwater compliance monitoring to determine when cleanup standards have been met and if groundwater arsenic is natural background or induced by petroleum hydrocarbon degradation.

Remaining soil impacts are located under an active roadway (SR 522). Recently, two years of quarterly monitoring has been completed. Slight exceedances remain for dissolved heavy oil in groundwater, which was not a contaminant of concern in the CAP. Groundwater arsenic remains high in some wells, but might be local natural hot spots. Ecology and the City of Bothell will work together to evaluate next steps.

Site Background

The City of Bothell (Bothell) is the current owner of the property south of the intersection of SR 522 and SR 527, at 18120, 18132, and 18126 Bothell Way NE, Bothell (King County Tax Parcel Nos. 945720-0015) and 10001 Woodinville Dr. (King County Tax Parcel No. 945720-0020) as well as the adjacent right-of-way. Bothell acquired the right-of-way property in the late 1990’s and acquired the remaining Bothell Landing Property in 2007. They entered into an Agreed Order with Ecology in 2009 for investigation of contamination on the site.

A strip mall, restaurants, and historic gas stations with multiple abandoned petroleum underground storage tanks (USTs) formerly occupied the site. Initially, a portion of this site was acquired by Bothell for roadway widening and construction of a small park (Rotunda Park). In the course of redevelopment, five underground storage tanks and approximately 385 tons of petroleum contaminated soil were encountered and removed during construction of the park in 1998. Two gasoline service stations were formerly located on the north and northeast portions of the Bothell Landing site. One of the stations was likely associated with the five underground storage tanks.

The Bothell Landing Site was under the Voluntary Cleanup Program and Ecology issued an Interim No Further Action letter in 2002 for site soils (excluding ground water). The property owner recorded a restrictive covenant for the site in 2002 confirming that petroleum-affected soils and ground water exist at the site. Ecology removed the site from the Voluntary Cleanup Program in 2006 due to a lack of activity. Also in 2006, Ecology issued a Further Action Determination at the Site. The Further Action Determination stated that Ecology would review the No Further Action determination based on further ground water data showing compliance with the MTCA cleanup levels for petroleum hydrocarbons and aromatic hydrocarbons at the site (Riley Group, 2007).

An environmental investigation conducted at the Site in 2007 included soil and ground water samples at two locations. One location was at the vicinity of the former underground storage tank location near the north property boundary. The second location is at the central and southern portion of the Site, where historic fill activities are suspected. Chlorinated volatile organic compounds were detected in ground water samples. The source of these organic compounds is the nearby Ultra Custom Care Cleaners site, which is being cleaned up separately Interim action soil cleanups of petroleum hydrocarbons were conducted in 2010, 2013, 2014, 2015,and 2017. Chemicals of concern remaining after the interim action soil cleanups are:

  • In soil: Gasoline range petroleum hydrocarbons and benzene
  • In groundwater: Arsenic

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.

Environmental Covenant

County Recording #: 20020104001469
County Recording Date: 1/3/2002

Covenant Restrictions

  • Any activity that results in release or exposure or creates a new exposure pathway
  • Prohibit New Building Construction
  • Prohibit Removal or Alteration of Existing Buildings
  • Restrict Land Use

Media Restrictions

  • Groundwater
  • Soil

Other Upland Instrument

County Recording #:
County Recording Date:

Covenant Restrictions

  • Maintain/Protect Monitoring System
  • Ongoing Maintenance of Remedy
  • Prohibit Soil Disturbance
  • Restrict All Ground Water Extraction/Well Installation
  • Restrict Domestic Ground Water Extraction/Well Installation

Media Restrictions

  • Groundwater
  • Soil
Legal 9
Leaking Underground Storage Tank 1
Document Title Document Date Document Type
Bothell Landing (Triangle Park) - LUST Site Assessment 6/10/2014 LUST - Site Assessment Report
Public Information 7
State Environmental Policy Act 4
Technical Reports 36
Document Title Document Date Document Type
Quarterly Progress Report October - December 2020 1/4/2021 Progress Report
Quarterly Progress Report July - September 2020 10/1/2020 Progress Report
Quarterly Progress Report April - June 2020 7/7/2020 Progress Report
Annual Groundwater Compliance Monitoring Report Bothell Paint, Bothell Hertz, and Bothell Landing Sites Bothell, Washington 6/23/2020 Groundwater Monitoring Report
Quarterly Progress Report January - March 2020 4/1/2020 Progress Report
Quarterly Progress Report #7 Oct 1 - Dec 31, 2019 1/15/2020 Progress Report
Quarterly Progress Report #6 July 1 - Sept 30, 2019 10/1/2019 Progress Report
Quarterly Progress Report #5 Apr 1 - Jun 30, 2019 7/1/2019 Progress Report
Quarterly Progress Report #4 Jan 1 - Mar 31, 2019 4/1/2019 Progress Report
Quarterly Progress Report #3 Oct 1 - Dec 31, 2018 1/3/2019 Progress Report
Quarterly Progress Report #2 July 1 - Sep 30, 2018 10/1/2018 Progress Report
Quarterly Progress Report #1 April 1 - June 30, 2018 7/2/2018 Progress Report
Compliance Ground Water Monitoring Plan Bothell Landing Site Bothell, Washington 6/5/2018 Cleanup Action Plan
Final Cleanup Action Plan Bothell Landing Site Bothell, Washington 5/24/2018 Cleanup Action Plan
Final Remedial Investigation/Feasibility Study Report Bothell Landing Site; 5/24/2018 Remedial Investigation / Feasibility Study
Compliance Ground Water Monitoring Plan Bothell Landing Site Bothell, Washington 1/2/2018 Cleanup Action Plan
Draft Cleanup Action Plan Rev1 Bothell Landing Site Bothell, Washington 8/10/2017 Cleanup Action Plan
Draft Final Remedial Investigation/Feasibility Study Report Bothell Landing Site Bothell, Washington 8/10/2017 Remedial Investigation / Feasibility Study
Progress Report for Period Ending June 2013 8/9/2013 Progress Report
Progress Report for Period Ending March 2013 4/8/2013 Progress Report
Progress Report for Period Ending December 2012 1/28/2013 Progress Report
Bothell Landing- Final RI/FS Work Plan 12/16/2011 Remedial Investigation / Feasibility Study
Bothell Landing- RI/FS Work Plan Submittal and Notice to Proceed with Phase 1 RI/FS Work 12/16/2011 Site Specific Technical Document - other
Progress Report for Period Ending June 2011 7/15/2011 Progress Report
Progress Report for Period Ending March 2011 4/1/2011 Progress Report
Progress Report for Period Ending September 2010 10/8/2010 Progress Report
Interim Action Work Plan - Bothell Landing 4/30/2010 Interim Action Documents
Bothell Landing - Safety & Health Plan 2/28/2010 Health and Safety Plan
City of Bothell Response to Ecology's Opinion Review Letter dated 1/12/10 1/29/2010 Site Specific Administrative Document - other (Administrative correspondence)
Bothell Landing - Ecology Letter Re Site Recommendations & Review of RI/FS & DCAP 1/1/2010 Site Specific Administrative Document - other (Administrative correspondence)
Bothell Landing Draft RI/FS Report 12/8/2009 Remedial Investigation / Feasibility Study
Bothell Landing DCAP 12/1/2009 Cleanup Action Plan
Bothell Landing RI/FS Work Plan Amendment and Approval 8/1/2009 Remedial Investigation / Feasibility Study
Bothell Landing Draft Health and Safety Plan 2/26/2009 Human Health and/or Eco Risk Assessment
City of Bothell Multi Site Health and Safety Plan 2/25/2009 Human Health and/or Eco Risk Assessment
Bothell Landing Draft RI/FS Work Plan 2/1/2009 Remedial Investigation / Feasibility Study
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

  • Northwest Regional Office
    15700 Dayton Ave N
    Shoreline, 98133
    Please schedule an appointment to view print documents at this location.
  • King County Bothell Regional Library
    18215 98th Ave NE
    Bothell, 98011
    This location may only have print documents available during open comment periods.
  • Bothell City Hall
    18415 101st Ave NE
    Bothell, 98011
    This location may only have print documents available during open comment periods.

Contaminants 7

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Halogenated Organics - Halogenated Organics C
Metals - Metals Priority Pollutants C
Non-Halogenated Organics - Petroleum Products-Unspecified C C
Non-Halogenated Organics - Polycyclic Aromatic Hydrocarbons S
Halogenated Organics - Halogenated Solvents C
Metals - Arsenic C
Non-Halogenated Organics - Petroleum-Other RA
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.