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Site Report: Tesoro - Northstore #56

Site Name: Tesoro - Northstore #56
Address: 2844 Tudor Road, Anchorage, AK 99503
File Number: 2100.26.088
Hazard ID: 25104
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 61.180600
Longitude: -149.827800
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 a site assessment done in September of 1998, Benzene soil contamination was found around the fill pipe. A SVE system was installed in 1998, and utilized in 2001. In March of 1999 TCE and PCE was detected in the soils and groundwater from the previous Laundromat and Dry Cleaners at the site in the late 1950's. A Vapor Stripping and Circulation System was installed and utalized in October 2002. Long Term Monitoring was established and released with site closure was issued in 2005. Updated 12-14-06 Alyce Hughey.

Action Information

Action Date Action Description DEC Staff
9/17/1998 Update or Other Action During tank upgrade activities (cathodic protection installation) benzene and GRO contamination encountered in soils around the tanks. Benzene exceeds SCL. Monica English
12/29/1998 Underground Storage Tank Site Characterization or Assessment Paul Pinard sent a review with comments letter after reviewing the Site Assessment of Underground Storage Tanks During Cathodic Protection Upgrade, from Gilfilian, dated December 16, 1998. Alyce Hughey
2/2/1999 Update or Other Action Paul Pinard sent an approval letter for the 1999 workplan from Gilfilian Engineering. Alyce Hughey
3/18/1999 Release Investigation Phase I Release Investigation and March 1999 Ground Water Monitoring Event Report. Three monitor wells installed. Low levels of BTEX found in MW1 but met SCL. Soil from MW2 exceed PCE(2.54mg/Kg) and TCE(0.221mg/Kg). Water samples meet GCL for VOCs but were not analyzed for chlorinated solvents. Monica English
5/27/1999 Update or Other Action Based on RI results, DEC requests monitor wells be sampled for chlorinated solvents. Monica English
6/8/1999 Update or Other Action Groundwater Monitoring confirms benzene (0.23mg/L), PCE (0.06mg/L) and TCE (0.14mg/L) contaminants exceed GCLs in MW2. Monica English
9/14/1999 Update or Other Action Groundwater monitoring confirms MW2 exceeds ADEC GCL for benzene. Monica English
9/28/1999 Update or Other Action DEC letter acknowledges GW contamination at site. Request for CAP to address contamination. Monica English
11/16/1999 Update or Other Action Groundwater monitoring shows MW2 exceed ADEC GCL for PCE (0.017mg/L). Monica English
11/29/1999 Update or Other Action Record search for domestic wells within a one-quarter mile radius conducted. Monica English
1/7/2000 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Former Staff
1/7/2000 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77504 Upon review of 9/28/99 letter by Pinard requesting CAP, site was created. Former Staff
1/7/2000 Site Added to Database Former Staff
1/21/2000 Release Investigation Release Investigation conducted. Five monitor wells installed. Benzene concentrations exceeded in soil from MW6. PCE concentrations exceeded in soils from MW5, MW6 and MW7. TCE concentration also exceeded in soil from MW6. Benzene contamination in groundwater exceeds ADEC GCL in MW2, MW5, and MW6. No detectable levels of TCE or PCE found in GW. Historic property use conducted. Tudor Laundromat and Dry Cleaners formerly located on site. Tesoro states 'Tesoro Alaska Company, which has operated a retail fueling station on this site, should not be responsible for further investigaiton regarding the presence of TCE and PCE'. Monica English
3/10/2000 Release Investigation John Carnahan sent an approval letter for the February 28, 2000 Release Investigation Workplan for the installation of Monitoring wells MW7 and MW8. Alyce Hughey
12/6/2000 Long Term Monitoring Established September 2000 Monitoring Event and Comprehensive Analysis report received. Monica English
2/7/2001 Update or Other Action Soil Vapor Extraction System Pilot Test & Exhaust Air Quality Screening, 2001 Workplan submitted. Monica English
5/7/2001 Update or Other Action SVE treatment System Installation and Design of Ground Water Vapor Stripping and Circulation System report. Monica English
5/11/2001 Update or Other Action ADEC approval for SVE and VSC remedition system. Monica English
1/24/2002 Long Term Monitoring Established October 2001 Monitoring Event report received. Monica English
8/21/2002 Update or Other Action RECKEY has automatically been generated. Cynthia Pring-Ham
11/7/2002 Long Term Monitoring Established July 2002 Monitoring Event report received. Monica English
2/11/2003 Document, Report, or Work plan Review - other October 2002 Monitoring Event and VSC Well installation report received. A second VSC well is installed. Analytical soil results for this well show that no SCLs were exceeded for petroleum contaminants. Soils not sampled for chlorinated solvents. Monica English
1/14/2004 Leaking Underground Storage Tank Corrective Action Underway Approval of 2004 Work plan. Monica English
11/4/2004 Document, Report, or Work plan Review - other First Quarter 2004 Monitoring Event and SVE Rebound Test report. Following a 90-day system shut down, groundwater samples were collected and analyzed. None of the wells sampled exceeded GCLs. This is the fifth consecutive monitoriing event in which contaminants of concern were below GCLs. A summary report of activities will be submitted with a request for NFRAP determination. Rpt received April 5, 2004. Monica English
11/15/2004 Update or Other Action Staff attends the annual environmental planning meeting with Tesoro & MWH to discuss proposed plan for 2005. Monica English
11/19/2004 Update or Other Action File number 2100.26.088 assigned and entered into the Fileroom DB and LUST DB. Alyce Hughey
5/2/2005 Document, Report, or Work plan Review - other Summary Report and Request for No Further Action received. Monica English
5/26/2005 Update or Other Action Tesoro working with ADEC water quality staff to obtain a dewatering permit to lower GW table for purposes of intalling a new UST system. In reviewing the file, ADEC project manager notes that historically, PCE and TCE contamination has been documented at the site in soils and GW above ADEC cleanup levels. Convey concerns to water quality staff regarding possibility of PCE and TCE GW generated during dewatering activities. Monica English
5/30/2005 Update or Other Action Dewatering pump test is conducted to determine flow rates to drawdown GW table for installation of new USTs. Monica English
6/6/2005 Update or Other Action Correspondence (email) from Tesoro consultant stating that excavation dewatering and tank replacement on hold due to PCE and TCE contamination encountered during installlation of dewatering well. Note: petroleum contamination supposedly below SCLs). A summary report will be forthcoming. Monica English
6/27/2005 Site Closure Approved A No Further Action letter is issued by ADEC for contamination issues associated with upgrade activities for the underground storage tank system. Monica English
6/27/2005 Long Term Monitoring Complete Entered by E. Reese 1/24/06 Evonne Reese
12/14/2006 Update or Other Action Using Figure 1 from the Site Investigation/De-Watering Well Installation, from Montgomery Watson Harza, dated June 15, 2005, 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 Maps, on a Medium Size Map,, View Scale 1:9,840, Coordinate Datum, NAD83. High degree of confidence in accuracy of location. Alyce Hughey

Contaminant Information

Name Level Description Media Comments
For more information about this site, contact DEC at (907) 465-5390.

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.

There are no documents for this site report.

Hazard ID Site Name File Number
25379 Tesoro Northstore #56 - 2009 2100.26.562

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