Site Report: Dean's Auto Salvage USTs
| Site Name: | Dean's Auto Salvage USTs |
|---|---|
| Address: | 720 East Whitney Road, Anchorage, AK 99510 |
| File Number: | 2100.26.563 |
| Hazard ID: | 25423 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 61.224611 |
| Longitude: | -149.870127 |
| 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
On October 24th & 25th 2006, a Site Assessment was performed on 3 previously removed regulated Underground Storage Tanks (USTs): a 2,000 gallon gas; a 1,000 gallon used oil; and a 1,000 gallon diesel. This property has been used primarily as an industrial yard since the 1950s and as an auto salvage business since 1989. At the gas UST, two soil samples collected at 7 feet below ground surface (bgs) at the groundwater interface, contained contaminants, but below ADEC cleanup levels. A hydrocarbon odor and discoloration noted in the top 12 inches of surface soil was segregated into a contaminated soil stockpile. At the used oil UST, three soil samples collected at 4.3 feet bgs at the groundwater interface, contained contaminants, but below ADEC cleanup levels. Stained soil, which was encountered in the western portion of the excavation, was segregated into a contaminated soil stockpile. At the diesel UST, two soil samples, collected at 6 feet bgs at the groundwater interface, contained benzene up to 0.0622 mg/kg, which appeared to be related to the nearby shop floor drain underground injection control well. Slight hydrocarbon impacts encountered in the southwest portion of the excavation was segregated into a contaminated soil stockpile. The 60 to 80 cubic yard segregated contaminated soil was stockpiled adjacent to Whitney Road, just north of the office and shop building. A workplan, dated July 21, 2009 indicates The 150 cy stockpile of soil created during UST removals will be segregated on site with the objective of minimizing the amount of soil transported off site for treatment. Following field screening and segregation, soil samples will be collected from the UST soil to evaluate contaminant concentrations and disposal options.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 4/27/2007 | Site Added to Database | Site Added to Database | Mitzi Read |
| 7/1/2009 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST site created in CSP database for source area Dean's Auto Salvage USTs, 78788 | Mitzi Read |
| 7/2/2009 | Underground Storage Tank Site Characterization or Assessment | ADEC received Dean’s Auto Salvage UST Closure Report dated February 2, 2007, submitted by RSE On October 24th & 25th 2006, a Site Assessment was performed on 3 previously removed regulated Underground Storage Tanks (USTs): a 2,000 gallon gas; a 1,000 gallon used oil; and a 1,000 gallon diesel. At the 2,000 gallon gas UST, two soil samples collected at 7 feet below ground surface (bgs) at the groundwater interface, contained contaminants, but below ADEC cleanup levels. A hydrocarbon odor and discoloration noted in the top 12 inches of surface soil was segregated into a contaminated soil stockpile. At the 1,000 gallon used oil UST, three soil samples collected at 4.3 feet bgs at the groundwater interface, contained contaminants, but below ADEC cleanup levels. Stained soil, which was encountered in the western portion of the excavation, was segregated into a contaminated soil stockpile. At the 1,000 gallon diesel UST, two soil samples, collected at 6 feet bgs at the groundwater interface, contained benzene up to 0.0622 mg/kg, which appears to be related to the nearby shop floor drain underground injection control well. Slight hydrocarbon impacts encountered in the southwest portion of the excavation was segregated into a contaminated soil stockpile. The 60 to 80 cubic yard segregated contaminated soil stockpile is currently located adjacent to Whitney Road, just north of the office and shop building as of July 7, 2009. | Grant Lidren |
| 7/21/2009 | Update or Other Action | ADEC received UIC closure Workplan and Landfarm Treatment of Contaminated Soil, submitted by RSE. Based on discussions with ARRC, long term land farming is not a viable option at this site. Therefore, in addition to UIC closure work at the site, the 40 cy stockpile from previous UIC work, and the additional 60 cy of soil expected to be excavated at the area of impact from the UIC well, will be transported to ASR for treatment. The 150 cy stockpile of soil created during UST removals will be segregated on site with the objective of minimizing the amount of soil transported off site for treatment. Following field screening and segregation, soil samples will be collected from the UST soil to evaluate contaminant concentrations and disposal options. | Grant Lidren |
| 11/13/2009 | Update or Other Action | ADEC approved RSE plans to conduct closure sampling on the estimated 200 cubic yards of UST soil contained in the land spread area. RSE will collect soil samples, at least 8 to 12 inches bgs, at a frequency of two samples for the first 50 cubic yards and one sample for every 50 cubic yards thereafter. RSE will field screen the land spread area using a PID at a frequency of one sample per every 10 cubic yards. Soil samples will be selected from the highest PID results. Additionally, one quality assurance duplicate will also be collected. | Grant Lidren |
| 1/5/2010 | Document, Report, or Work plan Review - other | On this date, ADEC received Dean’s Auto Salvage UST Soil Removal Landspread Closure Sampling Results, submitted by RSE. On July 22, 2009, the onsite stockpile was landspread on a south facing grassed hillside north of the Dean’s office/shop building. On November 16, 2009, four soil samples and one duplicate, collected 6 inches into the landspread stockpile contained DRO up to 285 mg/kg. | Grant Lidren |
| 2/24/2010 | Cleanup Complete Determination Issued | The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed a review of the environmental records associated with the Dean’s Auto Salvage USTs. Based on the information provided to date, the ADEC has determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment, and this site is closed. This decision is based on the administrative record for the Dean’s Auto Salvage USTs, which is located in the offices of the Alaska Department of Environmental Conservation in Anchorage, Alaska. | Grant Lidren |
| 2/24/2010 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | 3/14/11- Administrative action addition for reporting purposes. | Bianca Reece |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | |
| Benzene | 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. |
| Hazard ID | Site Name | File Number |
|---|---|---|
| 4414 | Dean's Auto Salvage UICs | 2100.38.484 |