Facility Site ID: 77774779 Cleanup Site ID: 6663

Site Status

The Texaco Monterey Site in May 2023.
The Texaco Monterey Site in May 2023.
The Department of Ecology (Ecology) has negotiated a
legal agreement called an agreed order (AO) with Roystone on Queen Anne, LLC
(Roystone) and Chevron Environmental Management Company (CEMC) to conduct Site
cleanup. The AO requires Roystone to conduct an interim cleanup action to remove
contamination on the former Texaco property (Property) located at 631 Queen Anne Avenue North in Seattle. CEMC will continue the off-Property investigations and develop plans for cleanup of remaining contamination.

View the AO by following the link below:

Interim Action Completed

Interim action work included extensive excavation of contaminated soil and groundwater. Monitoring wells installed at the new building will help monitor any remaining contamination at the Site.
Interim action work included extensive excavation of contaminated soil and groundwater. Monitoring wells installed at the new building will help monitor any remaining contamination at the Site.

In March 2020, Roystone started the interim action to remove petroleum-contaminated soil and groundwater on the Property. The interim action was conducted as the Property was being redeveloped into a multi-story building with one level of underground parking. 


The interim action included:

  • Removing underground storage tanks, hoists, product piping, and other below-ground service station equipment discovered during excavation.
  • Excavating and removing approximately 16,745 tons of petroleum-contaminated soil from the Property. 
  • Collecting soil samples to show that all contaminated soil within the Property boundaries was removed. 
  • Treating and removing approximately 610,900 gallons of contaminated groundwater from the Property during excavation. 
  • Installing six groundwater monitoring wells at the Property in order to show, through sampling, that the groundwater at the Property complies with MTCA cleanup levels.
  • Installing a vapor barrier and a passive subslab depressurization (SSD) system (venting system) beneath the new building.
  • Collecting soil vapor samples to demonstrate that vapor intrusion (contaminated air entering the building) is unlikely. 

You can view the results of the interim action in the Final Interim Action Report (March 21, 2022) and a Final Post Remediation Groundwater Investigation & Vapor Intrusion Assessment Report (March 16, 2023).

We issued a Completion of Interim Action letter on May 1, 2023 to confirm that the interim action required by the Agreed Order is complete. 

Off-Property Investigation Proceeding

(Left) Indoor air monitoring at Del Roy Apartments. (Right) Groundwater well installation in the parking lot by Del Roy Apartments.
(Left) Indoor air monitoring at Del Roy Apartments. (Right) Groundwater well installation in the parking lot by Del Roy Apartments.

CEMC conducted off-Property surveying and groundwater monitoring in August 2020. Based on this data, CEMC submitted a Remedial Investigation Work Plan on February 8, 2022 that was later approved by Ecology.  

The Remedial Investigation Work Plan was implemented in phases. The following work has been completed or is planned:

Completed work: 

  • April 2022: The collection of indoor air samples and sub-slab vapor samples in the basements of the Monterey and Del Roy Apartments.
  • March 27-April 5, 2023: The installation of seven monitoring wells in the Monterey and Del Roy Apartment properties, and City of Seattle right-of-way. 

Planned work: 

  • Securing access agreements for the installation of more monitoring wells and vapor probes. 

Site Background

Manhattan Express Deli in the mid 1990s.
Manhattan Express Deli in the mid 1990s.

The Site includes the former Texaco property located at 631 Queen Anne Avenue North and the nearby Del Roy, Monterey, Bungalows, Queen Anne Arms, U-Park, and Bank of America properties. Several City of Seattle owned properties under West Roy Street, Queen Anne Avenue North, and 1st Avenue West are also part of this Site.





 Land use

  • 1927-1993: A Texaco gas station operated at the Property.
  • 1993-2017: A Manhattan Express Deli operated at the Property.
  • 2017-2020: The building on the property remained vacant before the current building was constructed.
  • 2020-Present: Cleanup and redevelopment of the property. 

Cleanup history

  • 1986: Ecology responded to complaints of gasoline odors at the adjacent Monterey Apartments, and discovered up to 2 feet of petroleum (gasoline and diesel) in groundwater beneath the Monterey Apartments and the Property. 
  • 1986-1990: Ecology installed groundwater monitoring wells and collected soil gas samples to investigate the contamination. The investigation identified the former Texaco gas station as the likely source of petroleum. Ecology installed two recovery wells to remove petroleum in groundwater.
  • 1993-1997: Ecology removed seven fuel underground storage tanks and found petroleum soil contamination. Ecology installed and operated a soil vapor extraction (SVE) and groundwater recovery system.
  • 2002: CEMC initiated independent interim actions, which included upgrading the SVE system, replacing the SVE with a dual-phase extraction system, and continuing investigations. Contaminated soil and groundwater still exist at the Site.
Legal 6
Public Information 4
Document Title Document Date Document Type
Texaco 211577 Monterey - Public Meeting Presentation 6/27/2019 Fact Sheet\Public Notices
Texaco 211577 Monterey - Public Participation Plan - June 2019 6/20/2019 Public Participation Plan
Texaco 211577 Monterey - Agreed Order Fact Sheet - June 2019 6/20/2019 Fact Sheet\Public Notices
Texaco 211577 Monterey - Fact Sheet Draft Consent Decree 10/1/2001 Fact Sheet\Public Notices
State Environmental Policy Act 1
Document Title Document Date Document Type
Texaco 211577 Monterey - SEPA-DNS - June 2019 6/20/2019 SEPA Documents
Technical Reports 81
Document Title Document Date Document Type
Texaco 211577 Monterey Quarterly Project Update January 2024 1/10/2024 Site Specific Technical Document - other
Texaco 211577 Monterey Quarterly Project Update October 2023 10/10/2023 Site Specific Technical Document - other
Texaco 211577 Monterey Quarterly Project Update July 2023 7/10/2023 Site Specific Technical Document - other
Texaco 211577 Monterey Summary of Soil Vapor and Ambient Air Sampling Events – April and November 2022 6/16/2023 Site Specific Technical Document - other
Texaco 211577 Monterey Completion of Interim Action Letter 5/1/2023 Interim Action Documents
Texaco 211577 Monterey MW-10 & SSI-W2 Well Modifications Memo 4/21/2023 Interim Action Documents
Texaco 211577 Monterey Quarterly Project Update April 2023 4/10/2023 Progress Report
Texaco 211577 Monterey Post Remediation GWI VIA Report 3/16/2023 Interim Action Documents
Texaco 211577 Monterey Quarterly Project Update January 2023 1/10/2023 Progress Report
Texaco 211577 Monterey Quarterly Project Update October 2022 10/10/2022 Progress Report
Texaco 211577 Monterey Quarterly Project Update July 2022 7/11/2022 Progress Report
Texaco 211577 Monterey Quarterly Project Update April 2022 4/11/2022 Progress Report
Texaco 211577 Monterey Interim Action Report 3/21/2022 Interim Action Documents
Texaco 211577 Monterey Remedial Investigation Work Plan 2/8/2022 Remedial Investigation Work Plan
Texaco 211577 Monterey Quarterly Project Update January 2022 1/10/2022 Progress Report
Texaco 211577 Monterey Quarterly Project Update October 2021 10/11/2021 Progress Report
Texaco 211577 Monterey Quarterly Project Update July 2021 7/9/2021 Progress Report
Texaco 211577 Monterey Quarterly Project Update April 2021 4/12/2021 Progress Report
Texaco 211577 Monterey RIWP Ecology Response Letter 3/19/2021 Site Specific Technical Document - other
Texaco 211577 Monterey Change in Project Coordinator 2/1/2021 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey Quarterly Project Update January 2021 1/11/2021 Progress Report
Texaco 211577 Monterey Quarterly Project Update October 2020 10/7/2020 Progress Report
Texaco 211577 Monterey UST Site Assessment Report 10/1/2020 Interim Action Documents
Texaco 211577 Monterey Quarterly Project Update July 2020 7/10/2020 Progress Report
Texaco 211577 Monterey Quarterly Project Update April 2020 4/16/2020 Progress Report
Texaco 211577 Monterey Off-Property Survey and GW Montoring Work Plan 3/18/2020 Remedial Investigation Work Plan
Texaco 211577 Monterey Comments to Off-Property GW Sampling Work Plan 2/13/2020 Site Specific Technical Document - other
Texaco 211577 Monterey Ecology Response to RIWP Extension Request 12/27/2019 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey RIWP Extension Request 12/2/2019 Site Specific Administrative Document - other (Administrative correspondence)
Change of Contact CEMC and Arcadis 9/18/2019 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey - Interim Action Work Plan 8/20/2019 Interim Action Documents
Texaco 211577 Monterey - SHA Rank Letter 6/14/2019 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey - Draft Interim Action Workplan - June 2019 6/6/2019 Interim Action Documents
Texaco 211577 Monterey - Site Hazard Assessment 5/7/2019 Site Hazard Assessment Report
Texaco 211577 Monterey - Ecology Memo Re: Recommendation for Site and File Reorganization 4/9/2019 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey - PLP Letter Roystone 3/26/2019 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey - SHA Notification Letter 3/15/2019 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey - Groundwater Monitoring 4th Quarter 2018 1/15/2019 Groundwater Monitoring Report
Texaco 211577 Monterey - NW3197 Cleanup Action Workplan 12/14/2018 Site Specific Technical Document - other
Texaco 211577 Monterey - Supplemental Subsurface Investigation Summary Report 12/26/2017 Site Specific Technical Document - other
Texaco 211577 Monterey - Groundwater Monitoring, 2nd Quarter 2017 4/19/2017 Groundwater Monitoring Report
Texaco 211577 Monterey - NW0911 VCP Termination Letter 8/10/2015 Site Specific Administrative Document - other (Administrative correspondence)
Texaco 211577 Monterey - Second Semi-Annual 2013 Groundwater Monitoring Report 3/26/2014 Groundwater Monitoring Report
Texaco 211577 Monterey First Semiannual 2013 Groundwater Monitoring Report 7/26/2013 Groundwater Monitoring Report
Texaco 211577 Monterey - Second Semi-Annual 2012 Groundwater Monitoring Report 2/5/2013 Groundwater Monitoring Report
Texaco 211577 Monterey - First Semi-Annual 2012 Groundwater Monitoring and Sampling Report 9/7/2012 Groundwater Monitoring Report
Texaco 211577 Monterey - Limited Subsurface Investigation 7/10/2012 Site Specific Technical Document - other
Texaco 211577 Monterey - First Semi-Annual 2011 Groundwater Monitoring and Sampling Report 8/30/2011 Groundwater Monitoring Report
Texaco 211577 Monterey - Second Semi-Annual 2010 Groundwater Monitoring and Sampling Report 5/23/2011 Groundwater Monitoring Report
Texaco 211577 Monterey - First 2010 Semi-Annual Groundwater Monitoring Report 11/10/2010 Groundwater Monitoring Report
Texaco 211577 Monterey - August 2009 Vapor Sampling Event 5/27/2010 Site Specific Technical Document - other
Texaco 211577 Monterey - Semi-Annual Groundwater Monitoring Report, October 2009 1/22/2010 Groundwater Monitoring Report
Texaco 211577 Monterey - Semi-Annual Groundwater Monitoring Report, April 2009 7/7/2009 Groundwater Monitoring Report
Texaco 211577 Monterey GWM RPT 3/3/2009 Groundwater Monitoring Report
Texaco 211577 Monterey First Quarter 2008 DPE Systerm Report 12/10/2008 Site Specific Technical Document - other
Texaco 211577 Monterey Final RI and Site Summary 8/20/2007 Remedial Investigation Report
Texaco 211577 Monterey - NW3197 Monitoring Well Installation and Sampling 12/8/2006 Site Specific Technical Document - other
Texaco 211577 Monterey - Work Plan for Additional Environmental Investigations 9/17/2004 Site Specific Technical Document - other
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Event of April 29 and 30, 2004 6/4/2004 Groundwater Monitoring Report
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Event of Jan. 21, 22, and 23, 2004 2/25/2004 Groundwater Monitoring Report
Texaco 211577 Monterey - Dual Phase Extraction Pilot Test Work Plan 12/1/2003 Site Specific Technical Document - other
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Event of Oct. 1 and 2, 2003 11/6/2003 Groundwater Monitoring Report
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Event of June 30 and July 1, 2003 8/12/2003 Groundwater Monitoring Report
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Event of April 23 and 24, 2003 6/2/2003 Groundwater Monitoring Report
Texaco 211577 Monterey - Draft Remedial Investigation Report 3/3/2003 Remedial Investigation Report
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Events of Oct. 17 & 18 and Nov. 14, 2002 12/20/2002 Groundwater Monitoring Report
Texaco 211577 Monterey - Groundwater Monitoring & Sampling Report, Event of July 24, 2002 9/16/2002 Groundwater Monitoring Report
Texaco 211577 Monterey - Remedial Investigation Work Plan 9/5/2002 Remedial Investigation Work Plan
Texaco 211577 Monterey - Conceptual Site Model, Risk Assessment and Supplemental Investigation Proposal 8/21/2002 Site Specific Technical Document - other
Texaco 211577 Monterey - September 2000 Off-Site Explorations 2/5/2001 Site Specific Technical Document - other
Texaco 211577 Monterey - Draft Work Plan, Site Investigation 1/12/2001 Remedial Investigation Work Plan
Texaco 211577 Monterey - December 1999 and June 2000 Groundwater Summary Report 7/21/2000 Groundwater Monitoring Report
Texaco 211577 Monterey - Pilot Test Summary Report 7/19/2000 Site Specific Technical Document - other
Texaco 211577 Monterey - December 1999 Groundwater Sampling Analytical Results 1/11/2000 Groundwater Monitoring Report
Texaco 211577 Monterey - Groundwater Sampling and Analysis 12/8/1999 Groundwater Monitoring Report
Texaco 211577 Monterey - Pre-Design Engineering Report 7/21/1992 Engineering Design Report
Texaco 211577 Monterey - Phase 1 Remedial Investigation Report 8/31/1991 Remedial Investigation Report
Texaco 211577 Monterey - Final Phase 1 Remedial Investigation Project Work Plan 5/15/1991 Remedial Investigation Work Plan
Texaco 211577 Monterey - Final Phase 1 Remedial Investigation Quality Assurance Project Plan 5/15/1991 Remedial Investigation Work Plan
Texaco 211577 Monterey - Phase 1 Remedial Investigation Site Safety Plan 3/4/1991 Remedial Investigation Work Plan
Texaco 211577 Monterey - Final Sampling Analytical Plan 7/31/1990 Remedial Investigation / Feasibility Study
Voluntary Cleanup Program 1
Document Title Document Date Document Type
Texaco 211577 Monterey - NW3197 VCP Termination letter 2/22/2019 VCP Administrative Document
Pollution Liability Insurance Agency 1
Document Title Document Date Document Type
Texaco 211577 Monterey - PTAP Rejection Letter 2/28/2018 PTAP Rejection Letter
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.

Contaminants 11

Contaminant Type
Soil
Groundwater
Surface Water
Air
Sediment
Bedrock
Metals - Metals - Other S S S
Non-Halogenated Organics - Non-Halogenated Solvents C C C
Non-Halogenated Organics - Polycyclic Aromatic Hydrocarbons C C
Halogenated Organics - Halogenated Solvents C S
Metals - Arsenic S S S
Metals - Lead S C S
Metals - Mercury S S S
Non-Halogenated Organics - Benzene C C C
Non-Halogenated Organics - Petroleum-Diesel C C C
Non-Halogenated Organics - Petroleum-Gasoline C C C
Non-Halogenated Organics - Petroleum-Other C 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.