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Site Report: Residence - 1041 27th Avenue HHOT

Site Name: Residence - 1041 27th Avenue HHOT
Address: 1041 27th Avenue, Fairbanks, AK 99701
File Number: 102.38.034
Hazard ID: 1590
Status: Cleanup Complete - Institutional Controls
Staff: Janice Wiegers, 9074512127 janice.wiegers@alaska.gov
Latitude: 64.822126
Longitude: -147.726495
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

Leaking piping at Home Heating Oil Tank. Free product recovery in soil pits in crawl space in unit of housing complex. DEC requested site assessment and cleanup plan.

Action Information

Action Date Action Description DEC Staff
3/3/1992 Preliminary Assessment Approved Met with contractor February 26-28, and learned about residence with free product in basement. Will be requesting investigation. Former Staff
3/5/1992 Site Added to Database Heating Oil Former Staff
3/6/1992 Meeting or Teleconference Held Met with Clark Engineering. Former Staff
3/6/1992 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). Free products in tank pit and crawl space. Former Staff
3/10/1992 Update or Other Action (Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Request for corrective action. Former Staff
3/13/1992 Update or Other Action (Old R:Base Action Code = RAU - Remedial Actions Underway (General)). Verbal approval for Interim product recovery. Former Staff
3/23/1992 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Sent letters to 8 residents in housing units adjacent to problem site (1041 27th Avenue) Updated residents and requested their assistance in cleaning up site. Former Staff
3/31/1992 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Correspondence with AHP. S&W returned to conduct site assessment and product recovery. Vapors measured in basement of adjoining unit. Former Staff
4/7/1992 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Written response to SA1R sent 4-14-92. Former Staff
4/7/1992 Update or Other Action (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Reviewed product recovery/Site Assessment plan. Former Staff
5/20/1992 Meeting or Teleconference Held Conversation with S&W to update on progress. Still 1/2 gal/day fuel collected from subsurface. Former Staff
5/20/1992 Update or Other Action (Old R:Base Action Code = TAS - Treatment Alternative Study (CS)). Treatment options discussed. Will meet next week to evaluate, propose next action phase. Former Staff
6/2/1992 Update or Other Action (Old R:Base Action Code = PUBP - Public Participation)). Residents concern about vapors in home, will keep all residents appraised. Former Staff
6/2/1992 Meeting or Teleconference Held Met with resident near suspect site. Former Staff
6/2/1992 Update or Other Action (Old R:Base Action Code = TECH - Technical Assistance). Reviewed investigation/cleanup plan, answered Technical questions. Former Staff
6/16/1992 Meeting or Teleconference Held Met with AHP and S&W to review summary of activities to date and proposed future action. Ben Thomas
6/16/1992 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Sent letter updating status and suggested meeting time to discuss matters in person. Ben Thomas
6/16/1992 Update or Other Action (Old R:Base Action Code = PUBP - Public Participation)). Answered questions by public, and received full concurrence to move ahead with the preliminary phases of vapor sampling, monitoring wells, impervious membrane installation and remediation design. Former Staff
6/16/1992 Update or Other Action (Old R:Base Action Code = PUBP - Public Participation)). Informed 7 residents near problem unit whose property may be impacted by plume. Ben Thomas
6/16/1992 Site Characterization Report Approved (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Reviewed and given verbally. Approval pending written copy. Ben Thomas
6/24/1992 Meeting or Teleconference Held Met with residents of 27th Avenue who reside in units adjoining to 1041 to discuss the case history and proposed actions at the subject site. Cindy Thomas
9/11/1992 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Gave approval to install vapor barrier blower system at 1045 unit to abate potential diesel vapors. Ben Thomas
9/28/1992 Update or Other Action (Old R:Base Action Code = RPL2 - Site Information Request Letter). ADEC send PRP-CS Database Notification letter to RP requesting update and more environmental information concerning the site. Myrna Johnston AHP/Consumer Relations Liaison responded 10-30-92 with information concerning several AHP sites. Jeff Peterson
12/16/1992 Cleanup Plan Approved (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Reviewed and approved corrective action plan for product recovery, vapor extraction, and bioremediation. S&W will install additional recovery points, pilot test slated for VES, and waste water permit planned for Bio-injection. System should be on-line by breakup. Ben Thomas
12/27/1992 Site Ranked Using the AHRM Initial ranking. Former Staff
1/18/1993 Update or Other Action (Old R:Base Action Code = RAU - Remedial Actions Underway (General)). Summary report received notifying ADEC of free product recovery operation for winter/spring 1993. Approximately 34.2 gallons of diesel and 14.3 gallons of water recovered, and treated. Increasing GW levels will preclude additional FP recovery this field season. CAP to be implemented. Ben Thomas
2/5/1993 Meeting or Teleconference Held Met with S&W and AHP to discuss elements of corrective action plan. Venting, bioremediation and product recovery systems approved. Formal approval letter to follow. Cindy Thomas
3/26/1993 Meeting or Teleconference Held Teleconference with AHP regarding updated schedule to implement CAP. Discussed a number of technical issues regarding implementing VES, BIO, and free product recovery. Thomas stated that project starting to slow down and wanted action because ADEC has already approved plan. AHP would work on final authorization next week. Ben Thomas
4/2/1993 Update or Other Action (Old R:Base Action Code = PUBP - Public Participation)). Sent summary letter to all nearby residents to inform them of progress made to date at site, as well as anticipated actions this summer. Requested that all residents test/replace their existing heating oil tank piping systems to avoid future problems. Ben Thomas
4/2/1993 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Sent letter to AHP requesting that authorization to begin pilot test start immediately. Funding problems have slowed down VES/ASW design. Ben Thomas
10/11/1993 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Reviewed and approved "Project Work Plans, Corrective Action Plan" prepared by S&W. Plan includes product recovery, VES and Bioremediation. Approval letter requests that system be operating in 30 days from approval. Ben Thomas
9/15/1994 Meeting or Teleconference Held (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Met with AHP staff to discuss cleanup progress. Report submitted. Ben Thomas
9/20/1994 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed CAP modification report and sent letter of non-objection for installing an extraction system, and modifying the air injection program. General decline of hydrocarbons in GW observed. Ben Thomas
1/18/1995 Update or Other Action SITE SUMMARY: Leaking HOT in 1992 resulted in considerable soil/GW contamination including free product. Cleanup to date includes tank removal, product recovery, and vapor extraction. Total recovery is low and S&W is proposing AS as well. Site ranks too low for modified plan review, but ADEC approved whatever means necessary to increase system efficiency. Vapors in nearby basements appear abated. Cindy Thomas
2/7/1996 Site Ranked Using the AHRM Reranked with information from previous project manager, Hung, that groundwater was contaminated and that fumes and product still being recovered from crawl space. Previous score = 14. Former Staff
9/24/1998 Meeting or Teleconference Held Meeting with Sara Heimbach (new owner) and Shannon and Wilson regarding status of site. Renee Evans
11/2/1998 Update or Other Action Letter from Shannon and Wilson regarding some of the information needed to evaluate for 10 times rule. Renee Evans
2/4/1999 Meeting or Teleconference Held Teleconference with RP regarding verbal request for additional information to consider 10 times rule. Renee Evans
3/13/2000 Meeting or Teleconference Held Teleconference with RP regarding what is needed for "NFA" or "site closure", faxed copy of 1997 monitoring report, including recommendations. Renee Evans
8/15/2000 Update or Other Action Phone call (left message) to Sarah Himebauch, requesting information on any actions planned by RP following review of 1997 report faxed to RP on 3/13/00. Renee Evans
8/15/2000 Update or Other Action RP changed to Sarah Himebauch, P.O. Box 58136, Fairbanks, Alaska 99711 from AHFC. Renee Evans
8/21/2000 Update or Other Action Phone call from Sarah Himebauch, she is currently has no plans for any further monitoring or cleanup actions regarding this site. She will be pursuing a change of ordinance with the City of Fairbanks regarding well installation as appropriate. Renee Evans
7/10/2002 GIS Position Updated Changed the Latitude, Longitude, Method Accuracy, Accuracy and Unit fields. Heather Goldman
12/8/2006 Update or Other Action Per project manager updated site file. Name was AHFC Properties - 1041 27th Avenue. Wendy Uzzell
5/22/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Neal Everson
3/2/2009 Update or Other Action Sent letter to new owner with background information and request for environmental status. Neal Everson
1/8/2013 Update or Other Action Site symbol visually adjusted using FSNB satellite imagery, ArcGIS.com, and historical documents from file. Laurel Gale
9/24/2013 Update or Other Action Letter sent to current landowner requesting update. Janice Wiegers
1/12/2014 Update or Other Action Terry Kindcaid at AHFC contacted DEC to discuss information available in their files. Property was sold cash as-is by AHFC in 1997. Disclosures and waiver of all claims was recorded on the deed and is available through the state recorders database. Janice Wiegers
10/31/2014 Update or Other Action Updated database with name of new owner. Contacted AHFC to see if they had information on possible closure. Expecting call back. Janice Wiegers
11/4/2014 Update or Other Action Sent letter to current property owners requesting update on cleanup. Janice Wiegers
11/5/2014 Update or Other Action Checked FNSB property database; property appears to have new owners. Sent letter to the new owners asking for update on property conditions. Janice Wiegers
11/6/2014 Update or Other Action Contacted AHFC for any available information about status of cleanup at the time the property was sold. Janice Wiegers
12/23/2014 Potentially Responsible Party/State Interest Letter State interest letters sent to AHFC and the current landowners. Janice Wiegers
1/29/2015 Update or Other Action Received call from Coldwell Bankers, property manager for current landowners. Provided copies of past communication. Janice Wiegers
2/5/2015 Update or Other Action Attempted to call past owner who purchased property from AHFC. There was no answer or voicemail. Followed up with state interest letter. Janice Wiegers
3/5/2015 Update or Other Action State interest letters to homeowner that bought property from AHFC returned without being picked up. Janice Wiegers
3/18/2015 Site Visit DEC staff met the property manager at the residence and inspected the crawl space. The crawl space was lined with plastic, although the plastic was not sealed to the foundation. There was no sign of the form remedial system, other than a vent on the roof and some cuts in the concrete floor of the garage. There was a very slight diesel odor in the crawl space, but none in the living space. Janice Wiegers
4/7/2015 Update or Other Action Contacted Wells Fargo regarding adjacent residence which is currently in foreclosure to request access to inspect crawlspace. The residences along this street are attached (like townhomes). Abnormally high groundwater table last summer could have caused effects in adjacent residences. Janice Wiegers
4/21/2015 Site Visit Met with property manager representative to inspect crawlspace at 1045 27th Avenue. Although the building, which is in foreclosure, smelled of fuel, the odor appeared to be associated with the fuel lines and filter which had been disconnected from the furnace. Visual inspection of the crawlspace from the man door in the floor indicated the visqueen was laid down throughout the crawlspace, the visqueen appeared to be sealed to the walls, and there was no obvious signs of flooding or of product in the crawlspace. Janice Wiegers
4/24/2015 Potentially Responsible Party/State Interest Letter PRP letters sent to two previous owners at addresses found by Department of Law. Recent attempts to reach these parties have been unsuccessful. Janice Wiegers
5/4/2015 Update or Other Action Contacted by previous property owner regarding the PRP letter that identified him as a potentially-liable party. The previous appeared to know there had been a ventilation system in place, and indicated he had cleaned out everything from the crawlspace before selling the property. Janice Wiegers
6/25/2015 Update or Other Action Letter sent to AHFC requesting air sampling in residence to confirm no additional ventilation or remediation needed. Janice Wiegers
8/26/2015 Document, Report, or Work plan Review - other Indoor Air Sampling/Corrective Action workplan submitted by ARES, who is working for the landowner. DEC approved the workplan on 9/4/15. Janice Wiegers
10/21/2015 Document, Report, or Work plan Review - other Indoor Air Sampling report submitted on October 20, 2015. Air samples were collected on 10/1 in the crawlspace and on the first floor. Naphthalene and benzene were detected in the crawlspace above ADEC target indoor air levels. Benzene was detected slightly above indoor air targets on the first floor. Janice Wiegers
10/23/2015 Update or Other Action Called property manager to discuss air sampling report. Discussions are under way regarding how to mitigate air. Janice Wiegers
1/8/2016 Update or Other Action Sent letter to PRPs in response to air sampling report. DEC agreed with contractors recommendations to take some action to mitigate petroleum vapors in crawlspace that appear to be the result of vapor intrusion. Additional air sampling may be needed to evaluate the effectiveness of any mitigation measure. Requested response in 90 days. Janice Wiegers
4/7/2016 Update or Other Action Received an invoice from the property manager describing the system that was installed to mitigate vapors. The system included a perforated manifold soil gas remediation system with a radon removal fan. A new poly ground cover was place over the manifold and sealed to footers, posts, and other penetrations. An exhaust fan on a dehumidistat was also installed in the crawlspace. Janice Wiegers
4/25/2016 Update or Other Action DEC requested additional air sampling to demonstrate the newly installed system is effective, and requested details regarding the system operation and maintenance. Janice Wiegers
4/28/2016 Update or Other Action Ventilation Solutions provided a description of the system installed in the crawlspace to ventilate building. A perforated manifold soil gas remediation system was installed with a radon removal fan. A new poly ground cover was placed over the manifold system and sealed to the footers, posts, and around other penetrations. The system exhaust over the roof line. An exhaust fan on a Dehumidistat switch was also installed in the crawlspace and ducted to the outside. Janice Wiegers
2/14/2017 Update or Other Action ARES submitted a report describing the indoor air sampling completed in November 2016. Naphthalene was no longer present about DEC indoor air target levels. However, benzene was found at higher concentrations than when samples were collected on 10/1/2015, prior to the installation of the vapor intrusion mitigation system. Benzene exceeded the DEC target level on the first floor but not in the crawlspace. These results suggest that there is another source of the indoor air contamints not related to the subsurface contamination. This unit is attached to a garage, and to other units on both sides that are also attached to garages. Attached garages are a common source of benzene. Janice Wiegers
9/7/2017 Site Visit DEC conducted site visit to inspect crawlspace mitigation efforts. Crawlspace has been sealed with a new vapor barrier. A radon fan is in place to vent vapors from beneath the vapor barrier, and a ventilation fan has been installed in the crawlspace with a humidistat. DEC used a manometer to check airflow directions with system running and a ppbRae to check organic vapor concentrations beneath the vapor barrier, in the crawlspace air, and in the air on the main living floors. The measurements indicated the mitigation system was maintaining negative pressures beneath the vapor barrier and in the the crawlspace. Vapor concentrations were low in the living space a crawlspace (0.1 to 0.2 ppm) and slightly higher under the vapor barrier when the system was shut off (maximum of 0.7 ppm). Janice Wiegers
11/13/2017 Update or Other Action DEC emailed Notice of Environmental Contamination to property manager for landowners to sign. Janice Wiegers
12/1/2017 Institutional Control Record Established Institutional Controls established and entered into the database. Janice Wiegers
12/1/2017 Cleanup Complete Determination Issued Site closure letter sent to landowner. Janice Wiegers
3/12/2018 Update or Other Action Notice of Environmental Contamination and Institutional Controls recorded at DNR Recorder's Office on 11/30/2017. Janice Wiegers

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Assumed contamination beneath building. Concentrations uncertain.
Ethylbenzene > Human Health/Ingestion/Inhalation Soil Soil samples collected from MW-6 soil boring contained 110 mg/kg ethylbenzene in 1993.
Naphthalene > Vapor Migration to Indoor Air Indoor Air Napthalene in indoor air appeared to be associated with vapor intrusion; vapor barrier installed to control vapors.

Control Type

Type Details
Notice of Environmental Contamination NEC recorded on 11/30/17.
Signed CS Determination NEC with institutional controls signed by landowner.

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)
Periodic Review The landowner agrees to notify ADEC prior to any sale or transfer of the property and shall report to ADEC every 5 years to document the status of compliance with institutional controls described in this notice.
Other The crawlspace vapor barrier shall be inspected annually and maintained as needed to prevent vapors from intruding into the crawlspace.
Excavation / Soil Movement Restrictions In the event that the remaining contaminated soil becomes accessible in the future due to the building being removed, the land owner shall notify ADEC and characterize, and if determined necessary, cleanup the soil.
Groundwater Use Restrictions No groundwater wells shall be installed in the area covered by the institutional controls without prior DEC approval.

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State of Alaska Department of Environmental Conservation

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Juneau, AK 99811-1800
Phone: 907-465-5066
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