Site Report: Commercial Property - 619 East 5th Avenue UST #2
| Site Name: | Commercial Property - 619 East 5th Avenue UST #2 |
|---|---|
| Address: | 619 East 5th Avenue, Anchorage, AK 99501 |
| File Number: | 2100.26.588 |
| Hazard ID: | 26338 |
| Status: | Cleanup Complete |
| Staff: | Janice Wiegers, 9074512127 janice.wiegers@alaska.gov |
| Latitude: | 61.217858 |
| Longitude: | -149.872439 |
| Horizontal Datum: | WGS84 |
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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
In October 2014, following demolition of two buildings (the Former West addition, a maintenance shop, and the Former East Structure, a storage building), Tank #2, a regulated 1,000-gallon gasoline underground storage tank (UST) and associated piping were removed. The lot is currently vacant. The base of the excavation, after the tank removal, at approximately 7 feet bgs, exceeded applicable cleanup levels for gasoline range organics (GRO), toluene, ethylbenzene, and total xylenes at 2,080 mg/Kg, 14.6 mg/Kg, 41.4 mg/KG, and 613 mg/Kg, respectively. Groundwater was not encountered during the excavation and is believed to be greater than 35 feet below the ground surface.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 1/26/2015 | Potentially Responsible Party/State Interest Letter | Potentially Responsible Party / State Interest letter sent to Hickel Investment Company. | Lisa Krebs-Barsis |
| 1/28/2015 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 2/6/2015 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79732 name: 1,000-Gallon Gasoline UST #2 | Lisa Krebs-Barsis |
| 6/2/2015 | Site Characterization Workplan Approved | Reviewed and approved of site characterization work plan submitted by the RP's consultant. One boring within the footprint of the original excavation will be advanced to groundwater. No groundwater monitoring is anticipated for this investigation. Characterization work on the UST will be conducted simultaneously with work at the collocated heating oil tank site (2100.38.551). | Lisa Krebs-Barsis |
| 6/25/2015 | Site Visit | Visited the site to observe the advancement of boreholes. | Lisa Krebs-Barsis |
| 10/20/2015 | Site Characterization Report Approved | Reviewed the site characterization report submitted on August 18, 2015. Seven bore holes were advanced near the heating oil tank release. Groundwater was encountered at 35 feet below the ground surface (bgs). Diesel range organics at concentrations of 631 mg/Kg were detected at 30 feet bgs in Boring 6 (near the former dispenser and at the south end of the heating oil tank excavation) and 2720 mg/Kg at Boring 1 (within the former UST footprint). Gasoline range organics were detected at levels below the most stringent migration to groundwater cleanup level. A work plan to investigate groundwater was requested. | Lisa Krebs-Barsis |
| 11/13/2015 | Site Characterization Workplan Approved | Approved of work plan to install and sample three groundwater monitoring wells on Lots 25 and 26. | Lisa Krebs-Barsis |
| 1/29/2016 | Site Characterization Report Approved | Three monitoring wells were installed, two on Lot 25 (MW2, MW3) and one on Lot 26 (MW1). Groundwater was found approximately 35 feet below ground surface and was determined to flow to the north east. MW3 was placed in the source area. Samples collected from the each of the wells were analyzed for DRO, RRO, GRO, and BTEX. The sample from MW3 was also analyzed for PAH. None of the analytes were detected in any of the samples. | Lisa Krebs-Barsis |
| 3/21/2016 | Document, Report, or Work plan Review - other | Reviewed groundwater sampling work plan for 619 East 5th Ave. Monitoring wells MW-1, MW-2, and MW-3 will be purged and sampled for DRO, GRO, and BTEX. The sample from MW-3 will also be analyzed for PAHs. | Bill O'Connell |
| 7/7/2016 | Document, Report, or Work plan Review - other | Reviewed Groundwater Sampling Event No. 2 Report from the 619 East 5th Ave. property dated 7/7/2016. Samples were taken from 3 monitoring wells on June 17, 2016. The samples were analyzed for GRO, DRO, and BTEX. MW-1 was also analyzed for PAH. No analytes were detected in any of the samples. | Darren Mulkey |
| 8/11/2016 | Cleanup Complete Determination Issued | After the second round of groundwater samples with no exceedance of drinking water standards, the Decision Document was issued. | Darren Mulkey |
| 8/19/2016 | Update or Other Action | Groundwater wells were decommissioned by Montauk with no complications. | Darren Mulkey |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| Toluene | < Table C | Groundwater | After the second round of groundwater samples with no exceedance of drinking water standards, the Decision Document was issued. |
| Ethylbenzene | < Table C | Groundwater | After the second round of groundwater samples with no exceedance of drinking water standards, the Decision Document was issued. |
| Xylenes (total) | < Table C | Groundwater | After the second round of groundwater samples with no exceedance of drinking water standards, the Decision Document was issued. |
| GRO | < Table C | Groundwater | After the second round of groundwater samples with no exceedance of drinking water standards, the Decision Document was issued. |
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) |
| Hazard ID | Site Name | File Number |
|---|---|---|
| 26333 | Commercial Property - 619 East 5th Avenue | 2100.38.551 |
| 26240 | Fairview Areawide Brownfield Assessment | 2100.57.020 |