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Site Report: 10th Street Tesoro

Site Name: 10th Street Tesoro
Address: 920 West 10th Street, Juneau, AK 99801
File Number: 1513.26.080
Hazard ID: 26549
Status: Active
Staff: Danielle Duncan, 9074655207
Latitude: 58.301595
Longitude: -134.423835
Horizontal Datum:WGS84

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.


In March 2016, petroleum-contaminated soil was encountered during upgrades to the six fuel dispensers at the 10th Street Tesoro in Juneau. The distribution system upgrades included installation of containment sumps beneath each dispensers well as pressure testing of fuel lines. The release(s) may have occurred during previous maintenance of the dispenser fuel filters and possibly from spills during vehicle fueling activities. Remedial activities included excavation of ~7 cubic yards of petroleum-contaminated soil from beneath each dispenser to the extent possible without destabilizing existing infrastructure. There are also plans to reseal the seam between the pavement and the dispenser island. Diesel range organics, gasoline range organics, benzene, toluene, ethylbenzene, and xylenes remain in soil above DEC cleanup levels. The station began operations in 1987 and includes four 12,000-gallon underground storage tanks(USTs 1-4) that supply three grades of gasoline and diesel fuel.

Action Information

Action Date Action Description DEC Staff
4/20/2016 Report or Workplan Review - Other Rec'd the SARI on this date. On 5/2/16, I requested that the UST program's comments be addressed and that the report be resubmitted. Danielle Duncan
4/22/2016 Site Added to Database A new site has been added to the database Mitzi Read
4/22/2016 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST site created in CSP database for source area Fuel Dispenser Upgrades, 79908 Mitzi Read
4/22/2016 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79908 name: Fuel Dispenser Upgrades Mitzi Read
4/28/2016 Update or Other Action Gave approval today via email to transport the contaminated soil from the Delta Western facility to the AML dock for shipment to the disposal facility. Receipt/certification of disposal will be sent to me when provided. Danielle Duncan
5/2/2016 Update or Other Action Delta Western is going to address R. Weimer's comments and resubmit the SARI to me. Danielle Duncan
5/20/2016 Potentially Responsible Party/State Interest Letter Danielle Duncan
5/20/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79908 Fuel Dispenser Upgrades. Danielle Duncan
5/23/2016 Report or Workplan Review - Other Rec'd Monitoring Well Installation Work Plan/ Sampling and Analysis Plan May 2016. Danielle Duncan
6/2/2016 Site Characterization Workplan Approved Approved the work plan Monitoring Well Installation Work Plan/ Sampling and Analysis Plan May 2016 submitted by ISM Technical Services on behalf of Delta Western Inc. The work plan outlines the installation of two (2) groundwater monitoring wells to determine the extent (if any) of groundwater contamination due to leaks during gas station operation. Danielle Duncan
6/15/2016 Update or Other Action The locations of the monitoring wells have been modified to avoid traffic at the gas station. Danielle Duncan
9/16/2016 Site Characterization Report Approved Approved the Juneau 10th Street Tesoro Station: Monitoring Well Installation/Groundwater Monitoring Report (Report), dated September, 2016 and received in our office on 9/14/16. No contaminants of concern greater than DEC cleanup levels were detected in soil or groundwater collected on site during this sampling event. Danielle Duncan
9/20/2016 Update or Other Action Sent a follow-up letter to the recent groundwater sampling report. Site closure cannot be achieved at this time because the diesel range organics (DRO) contamination in soil on site exceeds the maximum allowable. The groundwater on site should be sampled quarterly in order to establish a trend. Additionally, it may be useful to add a third groundwater monitoring well on the north side of the fuel dispensers. Danielle Duncan
9/30/2016 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Administrative action addition for grant reporting purposes. Evonne Reese
10/3/2016 Meeting or Teleconference Held Teleconference with Delta Western and ISM to discuss roadblocks to site closure: the maximum allowable concentration is exceeded for DRO at 13,800 mg/kg. There are 2 monitoring wells on site and these tested non-detect for hydrocarbons, however these are not located within the zone of contamination due not wanting to have the well damaged as a result of on-going fueling operations. Before site closure, a trend must be established showing that the contamination is not migrating off-site. Danielle Duncan
10/31/2016 Update or Other Action The options moving forward for the site are: 1. Complete a new MW installation and sample – look for a trend (unknown amount of time)- site closure can happen with data gaps filled in 2. Dig up the concrete and remove the estimated 1-2 cubic feet of material -site closure can happen after removal 3. Leave the site as is-open- and when or if any opportunity arises to either remove the soil or complete another MW then and only then can site closure happen. Danielle Duncan
2/1/2017 Report or Workplan Review - Other Approved the work plan to excavate the soil where the contamination is above the maximum allowable. The work will occur in mid-April. Danielle Duncan
11/16/2017 Update or Other Action Expecting a report soon. Danielle Duncan

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details


Description Details

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