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Site Report: Alaska Native Tribal Health Consortium, Tract I Block 5 Tudor Centre


Site Name: Alaska Native Tribal Health Consortium, Tract I Block 5 Tudor Centre
Address: W of Tudor Centre Dr; S of Ambassador Dr; N of E Tudor Rd, Tract I Block 5 Tudor Centre Subdivision, Anchorage, AK 99508
File Number: 2100.38.540
Hazard ID: 26040
Status: Cleanup Complete
Staff: ,
Latitude: 61.181555
Longitude: -149.804217
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

During the installation of a parking lot, buried debris was discovered that appeared to be the result of dumping. The debris and surrounding soil were excavated. DRO and TCE concentrations greater than the 18 AAC 75.341 Tables B1 and B2 cleanup levels were found in soil samples from the excavation sidewalls. Areas with DRO exceedences were over-excavated, re-sampled, and found to be less than the applicable cleanup level. Areas with TCE contamination remain. The report does not include depths from which the soil samples were collected.

Action Information

Action Date Action Description DEC Staff
1/30/2012 Report or Workplan Review - Other DEC staff reviewed Montauk's 24 October report regarding the cleanup and treatment of contaminated soil on Tract I, Block 5, Tudor Center Subdivision. Tract I was used in the past as a dumping area for asphalt and other miscellaneous debris that may have been associated with a former asphalt plant that operated on Tract C-2. Visual evidence of contamination was noted in October 2010 by Watterson Construction Company. Cleanup of contaminated soil was performed in accordance with a May 2011 DEC approved work plan. Confirmation soil sample results within the excavation and floor sidewalls confirmed DRO levels remaining on-site were below 18 AAC 75.341 Table B2 migration to groundwater cleanup levels. Todd Blessing
4/24/2013 Site Added to Database A new site has been added to the database Mitzi Read
4/25/2013 Update or Other Action This site was previously included in Alaska Native Tribal Health Consortium, Tract J Block 5 Tudor Centre (File No. 2100.38.516, Haz ID 25531). TCE contamination greater than migration to groundwater cleanup level found in soil samples from an excavation sidewall during was found during the 2011 excavation of debris and potentially contaminated soil. The results of the excavation are summarized in a report by Montauk which is filled under 2100.38.516. Jacob Gano
4/25/2013 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79446 name: Former Debris Dump Mitzi Read
5/7/2013 Potentially Responsible Party/State Interest Letter PRP letter sent to ANTHC, attention Chris Vaught and Mike Roberts Jacob Gano
5/9/2013 Update or Other Action Sent letter to ANTHC requesting site characterization. Jacob Gano
6/5/2013 Update or Other Action In a letter dated May 24, 2013, ANTHC requested a 2-week extension to the deadline for providing a work plan. DEC authorized the extension in a June 2, 2013 email. Jacob Gano
6/12/2013 Site Characterization Workplan Approved Conditional approval letter Jacob Gano
12/18/2013 Report or Workplan Review - Other ADEC received the Groundwater Monitoring Report. One borehole was advanced at the previously encountered TCE exceedance and a groundwater monitoring well was installed. Two soil and 1 groundwater samples were collected and analyzed for DRO and TCE. All samples were non-detect. Meghan Dooley
2/12/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79446 Former Debris Dump. Meghan Dooley
9/27/2014 Site Visit ADEC conducted a site visit to observe groundwater monitoring efforts at ANTHC Tract I and Tract J sites. Meghan Dooley
12/3/2014 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation (ADEC) has reviewed the environmental records for the ANTHC Tract I, Block 5, Tudor Centre site. No further remedial action is required. Lisa Krebs-Barsis
12/3/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79446 Former Debris Dump. Lisa Krebs-Barsis

Contaminant Information

Name Level Description Media Comments
DRO < Method 2 Most Stringent Soil
Trichloroethene 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)

Missing Location Data

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