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Site Report: Tract 4 Alaska Village Subdivision

Site Name: Tract 4 Alaska Village Subdivision
Address: 7600 DeBarr Road, Anchorage, AK 99504
File Number: 2100.38.525
Hazard ID: 25740
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 61.209000
Longitude: -149.740000
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

The Tract 4 Alaska Village Subdivision site (Tract 4), Hazard ID 25740, is a square 2-acre parcel fronting on DeBarr Road that was formerly within the 68-acre Alaskan Village Mobile Home Park site (Park site), Hazard ID 2022. Tract 4 was created when the Park site was replatted in 2006. Releases at the Park site included small surface spills at various trailer spaces (e.g. from vehicle leaks) and a drum storage area (part of which was on what is now the Tract 4 parcel), and numerous releases from heating oil fuel storage and delivery systems that included individual underground heating oil tanks and a piping system. Following purchase of Tract 4 by the current owner, additional characterization was done that documented the presence of TCE in soil above the default cleanup levels. Cleanup Complete with Institutional Controls was issued on Sept. 29, 2011 with the closure document recognizing that TCE-contaminated soil is present at depth along the western portion of the property and does not pose a threat to human health, safety or the environment.

Action Information

Action Date Action Description DEC Staff
6/18/2007 Update or Other Action ADEC notified by consultant BGES that 2-acre Tract 4, part of the overall Alaskan Village site, was to be investigated for construction. BGES provided an electronic copy of "Remediation of Waste Oil and Heating Oil Contaminated Soil on the Eastern Portion of the Alaskan Village Mobile Home Park...January 29, 2003" prepared by TERRASAT. The report includes information pertaining to Tract 4. Eileen Olson
8/12/2008 Update or Other Action ADEC received Phase I report "Alaska Village Tract 4 , DeBarr Road...Phase I Environmental Site Assessment...April 2008" (electronic copy by email, prepared by BGES). Eileen Olson
10/9/2008 Update or Other Action Tract 4: Two reports submitted by BGES on behalf of Cook Inlet Housing for Tract 4 of Alaskan Village: "Additional Soil and Groundwater Sampling . . . October 2008" and "Limited Phase II Environmental Site Assessment . . . July 2008." Eileen Olson
10/22/2008 Update or Other Action Acknowledged receipt of information from Alaska Soil Recycling (ASR) notifying ADEC that ASR received 15 tons of petroleum impacted soils from the Alaskan Village site and that under ASR's approved facility operations plan, the soils may be co-mingled, the soils are covered by the bonding requirements of 18 AAC 75.365, and there is no further remedial action required by the responsible party for the soils. The soil was associated with a tank discovered on October 8, 2008. Eileen Olson
10/23/2008 Site Visit Site visit during excavation of soil at second of two releases encountered at former Alaskan Village site in October 2008. Eileen Olson
10/28/2008 Update or Other Action Acknowledged receipt of information from Alaska Soil Recycling (ASR) notifying ADEC that ASR received 118.67 tons of petroleum impacted soils from the Alaskan Village site and that under ASR's approved facility operations plan, the soils may be co-mingled, the soils are covered by the bonding requirements of 18 AAC 75.365, and there is no further remedial action required by the responsible party for the soils. The soil was associated with two releases encountered in October 2008. Eileen Olson
9/9/2009 Update or Other Action ADEC received electronic copy of "Groundwater Monitoring Report, Alaska Village Tract 4...September 2011". The report documents July 2008 work including advancing 6 soil borings for soil sampling, with 2 of the borings, SB1 and SB2, completed as monitoring wells. PCE was detected at concentrations of 0.0479 mg/Kg and 0.0373 mg/Kg in soil borings SB1 and SB2, respectively. Groundwater samples were non-detect for all target analytes (including HVOs) except RRO, which was detected at a concentration of 1.18 mg/L in MW-2, exceeding the 18 AAC 75.345 groundwater cleanup level of 1.1 mg/L. Eileen Olson
9/2/2011 Update or Other Action ADEC received "Work Plan for Groundwater Monitoring, The Alaska Village Tract 4" dated September 1, 2011. The plan proposes sampling existing monitoring wells MW-1 and MW-2. Eileen Olson
9/2/2011 Document, Report, or Work plan Review - other ADEC letter issued "Approval of Work Plan for Groundwater Monitoring, The Alaska Village Tract 4, Anchorage, Alaska dated September 1,2011 for Tract 4, Alaska Village Subdivision, within Alaskan Village Mobile Home Park site". Eileen Olson
9/2/2011 Meeting or Teleconference Held Staff met with Jeff Judd of Cook Inlet Housing and Bob Braunstein of BGES regarding conditions of approval for the BGES work plan received the same day and dated Sept. 1, 2011. Following the meeting Mr. Judd notified staff by email to send the cost recovery buillings to his attention at CIHA. Eileen Olson
9/9/2011 Document, Report, or Work plan Review - other ADEC review comments for "Groundwater Monitoring Report, Alaska Village Tract 4...September 2011" transmitted to consultant and responsible party by email of the that essentially requests that the current institutional controls for the Alaskan Village ~68-acre site as a whole remain in effect for Tract 4. Since PCE was not previously identified on what is now a 2-acre fragnent of the former Alaskan Village site, ADEC requested a figure showing the volume and location of soil that exceeds the cleanup level for PCE within the 2-acre parcel. Eileen Olson
9/22/2011 Update or Other Action ADEC received electronic copy of EBI Consulting "Environmental Site Assessment" for Tract 4 from David Thompson of SE Grainger Dvlop. Group. The ESA was prepared for Northwestern Mutual (Walgreens Portfolio - NML Investment #338988) and dated August 15, 2011. Eileen Olson
9/29/2011 Institutional Control Record Established Institutional Controls established and entered into the database. ICs include requirement to report to ADEC every five years to document land use, or report as soon as any change in land ownership, tenancy occupancy and/or use becomes known, if earlier than 5 years; requirement to decommission the two groundwater monitoring wells present at the site within 60 days of the date of the decision document, with documentation of such decommissioning provided to ADEC within 30 days of decommissioning; requirement to notify tenants and future purchasers that contamination by TCE is present at levels exceeding the site cleanup level in soil along the western portion of the property, and notice that petroleum hydrocarbons may be present in soil or groundwater at or near the top of the groundwater table, If soils in the area where TCE has been documented or soils close to the soil/ groundwater interface are exposed or excavated in any area of the property, they must be evaluated for contamination by field screening and analysis before being transported off-site for any purpose other than to treat them by approved remediation methods; movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited; and the Notice of Environmental Contamination (NEC) provided by ADEC that identifies the nature and extent of contamination at the site, and any conditions that the owners and operators are subject to in accordance with the decision document shall be recorded in the State Recorder's Office within 45 days. A copy of the recorded NEC must be provided to ADEC within 30 days of recordation. Eileen Olson
9/29/2011 Cleanup Complete Determination Issued Cleanup Complete Determination with ICs issued. Eileen Olson
10/3/2011 Site Added to Database A new site has been added to the database Mitzi Read
10/11/2011 Document, Report, or Work plan Review - other Acknowledged email by consultant that memorialized verbal approval by ADEC last week to use bentonite chips/slurry during well decommissioning activities at Alaska Village Tract 4. Eileen Olson
11/7/2011 Document, Report, or Work plan Review - other ADEC received and acknowledged this date "Site Activities Report for Decommissioning of Two Monitoring Wells, Alaska Village Tract 4" dated October 24, 2011 that documents decommissioning of the remaining two wells on the Tract 4 property on October 19, 2011. Eileen Olson
9/20/2012 Update or Other Action Staff changed from Eileen Olson to IC Unit. Kristin Thompson
9/20/2012 Institutional Control Compliance Review IC Compliance Review conducted. Reminder system set-up to follow-up with responsible party in 2016. Kristin Thompson
11/14/2012 Potentially Responsible Party/State Interest Letter ADEC letter notifying RP of cost recovery requirements. Eileen Olson
10/6/2016 Institutional Control Compliance Review IC compliance review conducted. Information added to the Closure/IC Details. The responsible party is required to report to ADEC regarding land use on a five year basis. The IC Agreement and Signature Page has not been signed, and it appears the Notice of Environmental Contamination (deed notice) was never recorded with the State. Contacted the former project manager to confirm status of the deed notice and will follow-up in one month's time for the five-year review. Reminder system set. Kristin Thompson
5/17/2017 Institutional Control Update The recorded Notice of Environmental Contamination has been located and uploaded to the database. An ICs Compliance letter was issued with a request for the responsible party to sign and return the ICs Agreement page. Reminder system set to follow-up in one month. Kristin Thompson
5/30/2017 Institutional Control Periodic Reporting Received confirmation that land use conditions have not changed. Kristin Thompson
5/23/2018 Institutional Control Compliance Review IC compliance review conducted. The signed ICs agreement page and the recorded Notice of Environmental Contamination are both uploaded as part of the Decision Document. Reminder system set for future follow-ups to occur every five years. Kristin Thompson

Contaminant Information

Name Level Description Media Comments
Trichloroethene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Notice of Environmental Contamination Deed notice includes figure showing location and horizontal extent of soil contaminated by TCE at concentrations above the cleanup level.

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site. Standard condition.
Other 5-year reporting required confirming that land use remains the same (commercial) or early reporting if land use changes.
Excavation / Soil Movement Restrictions Soil contamination by TCE is present at levels exceeding the site cleanup level along the western portion of the property. DRO or other petroleum hydrocarbons may be present in soil or groundwater at or near the top of the groundwater table, as has been documented at numerous other areas of the Alaskan Village Mobile Home Park site that included the subject site, Tract 4 of the Alaska Village subdivision. If soils in the area where TCE has been documented or soils close to the soil/ groundwater interface are exposed or excavated in any area of the property, they must be evaluated for contamination by field screening and analysis before being transported off-site for any purpose other than to treat them by approved remediation methods. Potentially contaminated soil and groundwater must be evaluated and contamination addressed in accordance with an ADEC approved workplan.
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) Standard condition.
Hazard ID Site Name File Number
2022 Alaskan Village Mobile Home Park (Former) 2100.38.135

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby