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Site Report: Alaska Qwik Lube UST #3


Site Name: Alaska Qwik Lube UST #3
Address: 4647 Old Seward Highway, Anchorage, AK 99503
File Number: 2100.26.582
Hazard ID: 26203
Status: Cleanup Complete
Staff: ,
Latitude: 61.178002
Longitude: -149.867150
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.

Problems/Comments

A 1,500-gallon regulated used oil underground storage tank (UST #3) failed a tightness test during the summer of 2013. An environemtnal site assessment during the UST closure process identified diesel range organics (DRO), residual range organics (RRO) and benzene in subsurface soil above applicable DEC cleanup levels. Polynuclear aromatic hydrocarbons (PAHs) and metals were also detected, but at values below cleanup levels.

Action Information

Action Date Action Description DEC Staff
9/15/2013 Update or Other Action The Contaminated Sites Program (CSP) completed its review of the Site Assessment Report, dated December 12, 2013 and received by the Alaska Department of Environmental Conservation (ADEC) on December 13, 2013. One 2,000-gallon heating oil underground storage tank (UST) was removed from this site on September 15, 2013. Because the UST was large in comparison to the excavator onsite, the UST was dragged out of the excavation, as opposed to lifted. Small holes were noted in the bottom of the UST and product was observed leaking out. It is not known if the holes were caused by the dragging of the UST or not. Following the UST removal, soils were excavated, field screened, and stockpiled onsite based on field observations and screening results. Groundwater was encountered at 6 feet bgs and a sheen was visible atop the groundwater. Several soil samples were collected from the excavation area and stockpiled soils, and were analyzed for one or more of the following: GRO, DRO, RRO, VOCs, PAHs, PCBs and metals. Concentrations of DRO were present up to 3,070 mg/kg; RRO up to 21,900 mg/kg; benzene up to 0.044 mg/kg; and PCE up to 0.0238 mg/kg (stockpile result). Joshua Barsis
11/27/2013 Update or Other Action CSP requested a work plan for further characterization/remedial action by June 1, 2014. Joshua Barsis
2/11/2014 Site Added to Database A new site has been added to the database Mitzi Read
2/11/2014 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST site created in CSP database for source area 1,500-Gallon Used Oil UST #3, 79602 Mitzi Read
2/11/2014 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79602 name: 1,500-Gallon Used Oil UST #3 Mitzi Read
2/24/2014 Potentially Responsible Party/State Interest Letter Bill Janes
7/15/2014 Update or Other Action A letter was sent on this day, which included a site summary and request for groundwater sampling by August 31, 2014. Joshua Barsis
9/4/2014 Report or Workplan Review - Other The CSP reviewed a work plan, dated September 2, 2014 for developing and sampling three groundwater monitoring wells at this site. The work plan was approved with the following condition: all samples must be analyzed for GRO, DRO, RRO, and VOCs. Joshua Barsis
12/17/2014 Report or Workplan Review - Other ADEC reviewed the underground storage tank (UST) System Closure Site Assessment and Release Investigation Report (dated December 8, 2014) for the Alaska Qwik Lube UST #3 site. Additional excavation was performed in May 2014 in an effort to remove any remaining contamination. Confirmation soil samples collected from the base and sidewalls of the excavation did not reveal any contaminant concentrations above ADEC cleanup levels. Groundwater was encountered at 10.5 feet bgs. Three monitoring wells were installed at this property (one of which is associated with this site). A groundwater sample collected from the well exhibited a concentration of RRO at 1.23 mg/L, which exceeds the ADEC groundwater cleanup level of 1.1 mg/L. In a letter dated December 16, 2014, the ADEC requested that all groundwater monitoring wells by resampled, re-surveyed, and the extent of soil and groundwater contamination be delineated. Joshua Barsis
12/17/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79602 1,500-Gallon Used Oil UST #3. Joshua Barsis
12/31/2014 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Administrative action addition for grant reporting purposes. Evonne Reese
7/29/2015 Update or Other Action In a letter dated July 29, 2015 ADEC requested a work plan for the following by April 1, 2016. (1)Delineate the extent of soil and groundwater contamination surrounding the former gasoline dispenser islands (2)Resample groundwater monitoring well MW3 for DRO and RRO (3)Resample groundwater monitoring wells MW1 and MW2, and any newly installed wells for GRO, DRO, RRO, VOCs, and lead (4)Survey the groundwater monitoring wells on your property, and nearby wells on adjacent properties to confirm groundwater flow direction and gradient Joshua Barsis
12/1/2016 Report or Workplan Review - Other Reviewed the October 2016 Release Investigation Report, dated November 2016. Soil and water samples were collected from three newly installed soil borings that were completed as monitoring wells (MW-QL-4, MW-QL-5, and MW-QL-6). Water samples were also collected from three existing onsite monitoring wells (MW-1, MW-2, and MW-3). Survey information collected during the October 2016 event revealed a southern groundwater flow direction at a gradient of 0.003 feet per foot. All results for MW-3 were below Table C groundwater cleanup levels. Joshua Barsis
12/1/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79602 1,500-Gallon Used Oil UST #3. Joshua Barsis
12/2/2016 Cleanup Complete Determination Issued Reviewed the environmental records associated with the Alaska Qwik Lube UST #3, located at 4647 Old Seward Highway in Anchorage. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required. Joshua Barsis

Contaminant Information

Name Level Description Media Comments
RRO < Table C Groundwater
DRO < Method 2 Most Stringent Soil
RRO < 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)

Missing Location Data

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