Site Report: Holiday Station Store #601 Dispensers
| Site Name: | Holiday Station Store #601 Dispensers |
|---|---|
| Address: | 1405 S. Bragaw St., Anchorage, AK 99508 |
| File Number: | 2100.26.634 |
| Hazard ID: | 27708 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 61.208481 |
| Longitude: | -149.807806 |
| Horizontal Datum: | NAD83 |
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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
This active fueling service station is a former contaminated site that was granted a Cleanup Complete with Institutional Controls status on December 7, 2003 (Hazard ID: 23846). There are three underground storage tanks (USTs) onsite, which include: two 10,000-gallon gasoline tanks, and one 15,0000-gallon gasoline tank. The tanks were installed in 1991 are located at the northern portion of the site. In November 2020, potential petroleum impacted soil was encountered during fuel system upgrades to four gasoline dispensers. Source is likely the dispensers and the cause of the release is unknown. The dispensers and their associated submersible turbine pump (STP) sumps were excavated, generating approximately 20 cubic yards of stockpiled soil. Initial soil screening results indicated exceedances above ADEC Method Two cleanup levels for the volatile organic compounds (VOCs) of benzene (maximum of 0.203 milligrams per kilogram (mg/kg), ethylbenzene (maximum of 0.495 mg/kg) , and xylenes (maximum of 3.11 mg/kg) in Excavations 3 and 4. In the stockpile sample, results indicated elevated levels of benzene (maximum of 0.163 mg/kg), ethylbenzene (maximum of 1.07 mg/lg) and xylenes (maximum of 10.7 mg/kg). A release investigation in October 2021 advanced four soil borings (B1-4), which were completed as monitoring wells (MW1-4). Analytical results of both the groundwater and soil samples from this release investigation indicated the presence of VOCs in both; dichlorofluoromethane (maximum of 0.109 micrograms per Liter (µg/L) was detected in the groundwater samples. All soil and groundwater samples, however, resulted in concentrations below ADEC Method Two Cleanup Levels.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 1/27/2022 | Site Added to Database | A new site has been added to the database | Mandy Salminen |
| 1/28/2022 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST site created in CSP database for source area Holiday Station Store #601 Dispensers, 81161 | Mandy Salminen |
| 2/4/2022 | Potentially Responsible Party/State Interest Letter | The ADEC issued a PRP letter to Mr. Hal Hatfield, Environmental Lead at Holiday Alaska, Inc. notifying them of the creation of a new contaminated site and their liability. | Flannery Ballard |
| 2/4/2022 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 81161 name: Holiday Station Store #601 Dispensers | Flannery Ballard |
| 4/4/2022 | Document, Report, or Work plan Review - other | The ADEC provided comments in response to the "Release Investigation Activities, Holiday Station Store #601" report, submitted January 3, 2022. The ADEC is requesting an updated conceptual site model, and a discussion of the need for a cumulative risk calculation. | Flannery Ballard |
| 9/30/2022 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | This action addition is for grant reporting purposes. | Evonne Reese |
| 4/13/2023 | Site Characterization Report Approved | The Alaska Department of Environmental Conservation (ADEC) Contaminated Sites Program (CSP) has reviewed the report, “Release Investigation Activities, Holiday Station Store No. 601”, dated December 3, 2021, and submitted to the department December 29, 2021. The CSP provided comment to the responsible party on April 12, 2022. A revised “Release Investigation Activities, Holiday Station Store No. 601”, report was received on April 14, 2022. This report documents a release investigation with field activities including advancing four soil borings, installing four groundwater monitoring wells, collecting soil and groundwater samples, conducting a level-loop survey, and management of investigated-derived waste (IDW). Contaminant concentrations exceeding the most stringent ADEC cleanup levels were not detected in the soil and groundwater samples collected during the release investigation activities. The CSP is requesting a work plan for well decommissioning. | Alena Voigt |
| 4/28/2023 | Site Characterization Workplan Approved | The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program (CSP) reviewed the “Work Plan for Groundwater Monitoring Well Decommissioning, Holiday Station Store No. 601”, dated April 24, 2023, and received from Shannon & Wilson, Inc. Four groundwater monitoring wells, designated as Wells MW1, MW2, MW3 and MW4 will be decommissioned by Discovery Drilling using the procedures outlined in the ADEC’s Monitoring Well Guidance (September 2013) document. | Alena Voigt |
| 5/8/2023 | Site Characterization Report Approved | The ADEC CSP reviewed “Groundwater Monitoring Well Decommissioning Report, Holiday Station Store No. 601”, report dated May 5, 2023. Monitoring wells MW1 through MW4 were decommissioned in accordance with the ADEC's "Monitoring Well Guidance". This site is currently being evaluated for closure. | Alena Voigt |
| 6/30/2023 | Cleanup Complete Determination Issued | Based on a review of the environmental record, analytical results indicate detectable concentrations for Benzene (0.203 mg/kg), Ethylbenzene (0.495 mg/kg), and Xylene(total) (3.11 mg/kg) remain in the soil at sample location DP3. In addition, Benzene (0.0692 mg/kg) remain in the soil at sample location DP4. These results are below ADEC Method Two Soil Cleanup Levels in 18 AAC 75.341 Tables B1 and B2 and ADEC has determined that residual contaminant concentrations meet the human health cumulative risk criteria for residential land use. | Alena Voigt |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| Benzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | |
| Ethylbenzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | |
| Xylenes (total) | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | 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) |
| Hazard ID | Site Name | File Number |
|---|---|---|
| 23846 | Holiday Station Store #601; Formerly WES #5001 | 2100.26.017 |