Site Report: Governor Residence - 716 Calhoun Avenue HHOT
| Site Name: | Governor Residence - 716 Calhoun Avenue HHOT |
|---|---|
| Address: | 716 Calhoun Avenue, Juneau, AK 99801 |
| File Number: | 1513.26.075 |
| Hazard ID: | 25317 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 58.302597 |
| Longitude: | -134.415007 |
| 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
In 2008, a change-in-service (from regulated to unregulated) Site Assessment (SA) for a 1,500-gallon heating oil underground storage tank (UST) at the residence on Calhoun Avenue. No visual leaks or odors were observed as four soil samples and one duplicate were collected from the site. The samples were analyzed for petroleum constituents and polycyclic aromatic hydrocarbons (PAHs). A subsurface soil sample, collected approximately eight feet away from the UST location at a depth of four feet below ground surface (bgs) (6-12 inches below the UST depth) was non-detect (ND) for petroleum constituents. Three shallow soil samples collected at the: fill pipe, vent pipe, and wall northeast of tank; at a depth of 28”, 18”, & 32” bgs respectfully; contained detectable concentration of PAHs and diesel range organics (DRO), but below ADEC cleanup levels. No Quality Assurance/Quality Control (QA/QC) form was included with the SA report.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 1/9/2009 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 1/9/2009 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST site created in CSP database for source area 500-Gallon HHOT (former duel purpose tank), 78670 | Mitzi Read |
| 2/19/2009 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 78670 name: 500-Gallon HHOT (former duel purpose tank) | Bruce Wanstall |
| 4/16/2009 | Update or Other Action | File number is 1513.26.076; in order to expedite project management the file was transferred to the Anchorage office | Bruce Wanstall |
| 5/28/2009 | Document, Report, or Work plan Review - other | File 1513.26.076 is being returned to Juneau to expedite project management. | Bruce Wanstall |
| 7/6/2009 | Site Visit | ADEC conducted a site visit with the environmental consultant Carson Dorn Inc to discuss environmental assessment requirement for a change-in-service for the underground oil storage tank at the Governor's Residence on Calhoun in Juneau. | Bruce Wanstall |
| 7/7/2009 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | ADEC evaluated the UST change in service Site Assessment Report and UST Assessment and Release Investigation regulatory sampling requirements. Soil boring depth and locations do not strictly meet the regulatory standard. The 500 gallon fiberglass tank is bordered on two sides by a retaining wall structure, limiting access for boring sites. In the 2008 Site Assessment, a soil boring advanced at the base of the retaining wall was screened to a depth over two feet below the bottom of the tank and petroleum vapors were not detected. Soil samples analysis supported the field test with non-detect results indicating the UST is not leaking. Drainage tiles at the base of the retaining wall channeled water subsurface water to the driveway and street. No signs of petroleum or staining were observed at these locations. ADEC requested that CDI obtain missing laboratory information and advance a soil boring next to and under the UST. | Bruce Wanstall |
| 1/28/2010 | Site Characterization Report Approved | The environmental data in Governor’s House UST Change-in-Service Site Assessment Report (12/09) was obtained using 18 AAC 78 approved methods and meets quality assurance acceptance criteria. | Bruce Wanstall |
| 2/5/2010 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 78670 500-Gallon HHOT (former duel purpose tank). | Bruce Wanstall |
| 4/16/2010 | Cleanup Complete Determination Issued | The site assessment investigation has identified residual contaminated at the site. Based on the information available, ADEC has determined no further assessment and no cleanup action is required and a Corrective Action Complete determination is granted. There is no unacceptable risk to human health or the environment, and this site will be designated as closed on the Department's database. ADEC approval is required for off-site disposal of contaminated soil in accordance with 18 AAC 78.600(h) and movement or use of potentially contaminated soil in a manner that results in a violation of 18 AAC 70 water quality standards is unlawful. However, since this site has met the most conservative soil cleanup levels, ADEC approves future off-site movement and disposal of soil associated with this release. This determination is in accordance with 18 AAC 78.276(f) and does not preclude ADEC from requiring additional assessment and/or cleanup action if future information indicates that this site may pose an unacceptable risk to human health or the environment. | Bruce Wanstall |
| 10/31/2014 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 78670 500-Gallon HHOT (former duel purpose tank). | Bruce Wanstall |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | < Method 2 Most Stringent | Soil | The highest concentration of residual diesel-fraction petroleum hydrocarbon detected in shallow soil sample from under UST piping was 5.970 milligrams per kilogram. |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.