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Site Report: Tesoro - Northstore #10

Site Name: Tesoro - Northstore #10
Address: 500 Hollywood Drive, Anchorage, AK 99501
File Number: 2100.26.084
Hazard ID: 23721
Status: Cleanup Complete
Staff: Peter Campbell, 9072623412 peter.campbell@alaska.gov
Latitude: 61.230100
Longitude: -149.874000
Horizontal Datum:NAD83

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Problems/Comments

During the upgrading of the piping of one 10,000-gallon regular gasoline, one 10,000-gallon premium unleaded gasoline, and one 5,000-gallon diesel underground storage tanks, soil contamination was encountered as a result of fuel releases from overfills. Approximately 90 cubic yards of contaminated soils was excavated and thermally remediated at CleanSoils in Anchorage. Groundwater was not encountered or affected. Soil contamination remains near the one 10,000-gallon premium unleaded gasoline tank by the footing/foundation of the store. Updated November 30, 2006 Alyce Hughey.

Action Information

Action Date Action Description DEC Staff
8/14/1996 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 76457 ADD; Gasoline contamination. Former Staff
8/14/1996 Site Added to Database Former Staff
8/15/1996 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LCAU; LUST corrective action underway. : LCAU date changed DB conversion Former Staff
3/5/1997 Update or Other Action Steve Bainbridge sent a follow up letter after attending the annual meeting of the Tesoro stations held on February 28, 1997. Alyce Hughey
11/5/1997 Update or Other Action Paul Pinard sent a follow up letter for Mike Krieber after attending the annual meeting of the Tesoro stations held on October 22, 1997. Alyce Hughey
11/20/1997 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: TESORO NORTHSTORE Former Staff
3/10/1998 Update or Other Action Dept review and commented on Workplan, submitted by consultant on 2/17/98 for work at this site in 1998. Workplan was not approved-- requested siting plan for additional soil borings and a copy of the report on the SVE pilot study that was to have been done last year. Former Staff
8/11/1998 Update or Other Action Paul Pinard sent a letter requesting the report on the pilot test for the SVE system after receiving the June 1998 monitoring event of the SVE system. Alyce Hughey
8/19/1998 Update or Other Action Paul Pinard sent an approval letter for the Workplan for Confirmation Soil Borings from Gilvilian Engineering, dated August 12, 1998. Alyce Hughey
8/20/1998 Update or Other Action Paul Pinard sent a review with comments letter after reviewing the Soil Vapor Extraction System Pilot Test Report from Gilfilian Engineering dated August 12, 1998. Alyce Hughey
1/7/1999 Update or Other Action Paul Pinard sent a letter with comments after reviewing the Confirmation Soil Test Holes from Gilfilian Engineering, dated December 7, 1998. Alyce Hughey
1/13/1999 Update or Other Action Paul Pinard sent a letter requesting a meeting after reviewing the December 1998 Monitoring Event from Gilfilian Engineering dated January 5, 1999. Alyce Hughey
2/10/1999 Update or Other Action Paul Pinard sent a letter requesting a meeting to discuss the proposed workplan for 1999. Alyce Hughey
9/8/1999 Update or Other Action Paul Pinard sent a letter addressing the concerns for the proposed workplan for SVE-2 Confirmation Soil Boring Workplan from Gilfilian Engineering, dated September 2, 1999. Alyce Hughey
9/23/1999 Update or Other Action Paul Pinard sent an approval letter for the Amended SVE-2 Confirmation Soil Borings Workplan from Gilfilian Engineering, dated September 16, 1999. Alyce Hughey
11/20/2000 Institutional Control Record Established JBC enters a NFRAP with condition for sampling one onsite well every two years, and additional RI upon closure/sale of station. John Carnahan
11/20/2000 Long Term Monitoring Established Every two years from one well beginning 2002, for 3 consecutive events. John Carnahan
2/26/2003 Conditional Closure Approved A NFRAP letter is issued for this site with the requirement that the monitor well and SVE system be properly decommissioned. Groundwater quality monitoring requirements have been completed. Monica English
2/26/2003 Institutional Control Record Removed The groundwater monitoring requirments established in the NFRAP letter have been met. Monica English
11/18/2004 Update or Other Action File number 2100.26.084 assigned and entered into the Fileroom DB and LUST DB. Alyce Hughey
10/9/2006 Update or Other Action Project manager changed from Monica English to Paul Horwath, per Paul Horwath. Alyce Hughey
11/30/2006 Update or Other Action Using Figure 1 from the November 1999 Confirmation Soil Boring Report, from Gilfilian Engineering, dated January 5, 2000, in conjunction with TopoZone Pro, Anchorage Live, and the Recorders Office, entered the coordinates for this site. Metadata includes No Topo Basemap, Black and White Aerial Photo, TopoZone Pro Street Map, on a Medium Size Map, View Scale 1:9,840. High degree of confidence in accuracy of location. Alyce Hughey
12/15/2011 Site Characterization Workplan Approved ADEC approved Shannon & Wilson's December 8, 2011, SITE ASSESSMENT WORK PLAN. The work plan proposes the drilling of three soil borings in the vicinity of the existing underground storage tanks and fuel dispensers. The soil borings might be constructed into monitoring wells. The purpose of this work is to investigate previously identified soil contamination remaining beneath the USTs. Shannon & Wilson prepared the work plan on behalf of HDR Alaska, Inc. (HDR). HDR was working with the Knik Arm Bridge and Toll Authority, which was in the process of acquiring property to establish public right-of-way for the proposed Knik Arm Crossing project. Paul Horwath
6/6/2013 Long Term Monitoring Complete Administrative action added during a quality control check. Kristin Thompson
10/16/2014 Update or Other Action This Update entry is to note that ADEC never received a report, following the approval of the December 8, 2011, Shannon & Wilson SITE ASSESSMENT WORK PLAN. This work was not performed under ADEC's regulatory mandates. It is unknown if that assessment work was completed, and/or if a report was ever finalized. Paul Horwath
11/6/2014 Institutional Control Update Current project manager chooses to retain management of the site at this time. Kristin Thompson
4/19/2016 Document, Report, or Work plan Review - other Reviewed an April 14, 2016 Work Plan for Proposed Site Assessment at Tesoro 2 Go Mart #10, which was prepared by MWH. This plan was reviewed to determine if the proposed assessment work was sufficient to satisfy the requirement for additional characterization and response work, under ADEC's February 26, 2003 NFRAP determination. Paul Horwath
9/1/2016 Offsite Soil or Groundwater Disposal Approved Contaminated soil was transported to Alaska Soil Recycling in Anchorage, for treatment and disposal/reuse. Paul Horwath
9/1/2016 Site Reopened USTs were excavated and removed from the site during Permanent UST Closure work. Contamination found in the tank excavation pit. Some soil removal and cleanup completed during excavation and removal of UST systems. Additional release investigation work to be completed. Paul Horwath
9/15/2016 Update or Other Action At this time, the current project manager chooses to retain management of this site which has institutional controls. IC Unit
3/9/2017 Site Characterization Workplan Approved ADEC approved the MWH/Stantec-prepared February 23, 2017 Work Plan for Task 2 for the Installation of Combination SVE/GWM and GWM Wells. Paul Horwath
12/7/2017 Meeting or Teleconference Held Meeting with Tesoro's Anne Duarte and Stantec staff at the offices of Stantec in Anchorage. Review work accomplished in 2017, and work proposed for 2018. Paul Horwath
2/14/2018 Document, Report, or Work plan Review - other Reviewed the Stantec-prepared February 6, 2018 Work Plan for Tasks 2 & 3, proposing the installation of two soil borings, and the implementation of an SVE Pilot Study on SVE/MW 17-7. Intend to discuss the work plan with Stantec this week by phone. Paul Horwath
2/26/2018 Document, Report, or Work plan Review - other Approved Stantec's February 6, 2018 Work Plan for Task 2 and Task 3 Installation Confirmation Soil Borings (CSB) and Soil Vapor Extraction (SVE) Pilot Test for the Tesoro Northstore #10 site in Anchorage. Paul Horwath
7/17/2018 Offsite Soil or Groundwater Disposal Approved ADEC Approved the transport / disposal of two drums of drill cuttings to the Columbia Ridge Landfill in Arlington, Oregon. Paul Horwath
12/12/2018 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 76457 name: autogenerated pm edit - Tesoro - Northstore #10 Paul Horwath
1/10/2019 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 76457 autogenerated pm edit - Tesoro - Northstore #10. Paul Horwath
2/13/2019 Site Characterization Report Approved Stantec submitted revised release investigation reports and documents in order to reflect the current ADEC soil and groundwater cleanup levels which were adopted as on September 29, 2018. Findings and recommendations were modified to state that the soils at the site met all current ADEC soil cleanup levels. The cleanup level for 1,2,4-Trimethylbenzene increased substantially on September 29, 2018. Paul Horwath
2/13/2019 Cleanup Complete Determination Issued ADEC issued a Cleanup Complete Determination letter dated February 13, 2019 to Anastasia Duarte, Tesoro Refining and Marketing Company. Paul Horwath
2/13/2019 Institutional Control Record Removed Institutional Controls have been removed. Paul Horwath
7/26/2019 Document, Report, or Work plan Review - other ADEC conditionally approved Stantec's July 18, 2019 Decommissioning work plan. Paul Horwath
12/9/2019 Update or Other Action Reviewed the Monitoring Well and SVE Lines Decommissioning Report, Dec. 4, 2019. Remaining monitoring wells and soil vapor extraction lines have been removed, completing the tasks stipulated for the removal of institutional controls. Peter Campbell

Contaminant Information

Name Level Description Media Comments
DRO < Method 2 Most Stringent Soil
GRO < Method 2 Most Stringent Soil
Benzo(a)pyrene < Method 2 Most Stringent Soil
Benzo(a)anthracene < Method 2 Most Stringent Soil
1,2,4-Trimethylbenzene < Method 2 Most Stringent Soil
1,3,5-Trimethylbenzene < Method 2 Most Stringent Soil
Xylenes (total) < Method 2 Most Stringent Soil
Benzene < Method 2 Most Stringent Soil

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

No associated sites were found.

Missing Location Data

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby