Site Report: IHS Tanana Health Center

Site Name:	IHS Tanana Health Center
Address:	7.5 Acres on 1st Avenue, East of Village by School, Tanana, AK 99777
File Number:	780.38.003
Hazard ID:	116
Status:	Active
Staff:	Sophia Bracio, 9074511682 sophia.bracio@alaska.gov
Latitude:	65.171561
Longitude:	-152.091478
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.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

Historic Entry - Original Tanana Center (hospital) contaminated by fuel spill from above ground tank of unknown amount in 1975. Extent of contamination from 1975 fuel spill unknown. Contaminated well was abandoned 1976. Unknown amount of fuel spilled at pumphouse in fall of 1984. Water samples from 1984 indicated no contamination of current water supply well. Antimony near MCL and RRO 1/10 Table C value detected in one water sample collected from Tanana Tribal Council municipal drinking water well in August 2001 by EPA START. Also see file 780.02.002 and archived file 780.07.003. Files indicate problem with coliform bacteria. Initial reference to oil contamination in 1975. Depth to unconfined aquifer groundwater estimated to vary between 10 and 28 feet below ground surface. CERCLIS ID AKN001002276. Formerly Fort Gibbon and St. James Mission circa 1898. 2009 Update - Soil and groundwater contamination from releases associated with ASTs, USTs, a bulk fuel tank farm, and a fuel distribution system. ACLs: Alternate soil cleanup levels were developed in 1997, DRO 6,000 ppm; GRO 1,400 ppm. Benzene in groundwater ACL of 160ug/L. ADEC did not immediately approve the proposed ACL’s however, an action in the database dated May 26, 2000 states that the ACLs were approved. The former Hospital, Generator Building, and Vehicle Maintenance Garage were demolished during the summer of 2009.

Action Information

Action Date	Action	Description	DEC Staff
1/20/1975	Update or Other Action	(Old R:Base Action Code = FI - Field Inspection (General)). 3 water samples collected by Office of Environmental Health between 1/15/75 and 1/18/75. 0.2 to 2.0 ppm (? units) oil and grease detected.	Former Staff
1/1/1976	Interim Removal Action Approved	(Old R:Base Action Code = AWS - Alternative Water Supply (General)). New well installed sometime in 1976. Well is 97 feet deep. Contaminated well abandoned.	Former Staff
1/25/1982	Update or Other Action	(Old R:Base Action Code = FI - Field Inspection (General)). Site visit following spill on 12/29/81 of approximately 2500 gallons heating oil. ADEC recommended putting saturated gravel in bermed and lined area until summer, and then using it for road surfacing.	Former Staff
1/18/1985	Update or Other Action	(Old R:Base Action Code = FI - Field Inspection (General)). Water sample from clinic on 12/20/84 by Office of Environmental Health showed no detected BTEX (taken after recent oil spill at pumphouse and sample by Northern Testing indicating 280 ppb weathered gasoline).	Former Staff
6/1/1990	Site Number Identifier Changed	Old Reckey 198231013632 and 823103632.	Former Staff
11/19/1990	Site Ranked Using the AHRM	Initial ranking.	Former Staff
6/5/1992	Interim Removal Action Approved	Contaminated soils excavated and stockpiled during excavation for school building addition foundation installation.	Dan Basketfield
6/12/1992	Preliminary Assessment Approved	(Old R:Base Action Code = SA1 - Phase I Site Assessment (General)). 6/91 Hazcon of Seattle surveyed soil contamination at 17 tank sites and pipeline for USPHS. Extensive and intensive contamination was found at depths to 5.3 feet (limit of boreheads). Most of these are probably asssociated with over fills.	Former Staff
6/30/1992	Site Added to Database		Former Staff
6/18/1993	Update or Other Action	(Old R:Base Action Code = RPS - Responsible Party Search). Sent letter to Dalton Woodford of Alaska Area Native Health Service advising him of RP status. Information request included. Requested to empty unused tanks, test used tanks, develop release investigation plan ASAP and submit Corrective Action plan following release investigation. Reply within 30 days.	Don Gibler
1/14/1994	Update or Other Action	(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to RP requesting update and more environmental information. RP responded with completed information form.	Jeff Peterson
8/8/1994	Site Ranked Using the AHRM	Reranked. (Current drinking water source not contaminated).	Former Staff
5/11/1995	Site Characterization Report Approved	(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Reviewed 4/95 "Site Investigation Report." 1994 - removed some USTs, ASTs and 1,100 feet of pipeline. 5 USTs, 8 ASTs, tank farm and fill line from Yukon River to tank farm remain from initial install. Extensive SB analysis to vadose zone (15 feet) indicate possible GW contaminated Estimate 6,500 cubic yards contaminated soil. Floor drain needs to be addressed. Plans: investigate GW by microwell tech., risk assessmt. or risk screening, remove soil 3-5 feet below ground surface, remediate possibly by Hot Air Vapor Extraction.	Eleanor Hung
6/12/1995	Meeting or Teleconference Held	Met with ADCOE, IHS,& USPHS regarding further investigation, cleanup plans and E&E 4/95 investigation report. Issues omitted from report that need to be addressed: UIC-old floor drain(s) in garage (EPA notified by DEC), use EPA Method 502.2 for all active drinking water wells, inactive wells Method 602,inform how IDWs being disposed of. One regulated UST (emergency generator) will have separate file.	Eleanor Hung
4/3/1997	Update or Other Action	ADEC received a Site Investigation Report Phase II dated March 1997. The report contained a site specific risk assessment.	Shah Alam
7/23/1997	Update or Other Action	ADEC provided comments to RA.	Shah Alam
10/27/1997	Update or Other Action	ADEC received responses to RA comments.	Shah Alam
6/9/1999	Update or Other Action	ADEC/CS Staff (Alam) discussed Tanana Hospital UST closure report with ADEC/STP Staff (Steve Bainbridge). Agreed that no need to issue a closure report for USTs. Contaminated Sites ACLs will be applicable to the UST contaminated soils and GW.	Shah Alam
7/29/1999	Update or Other Action	ADEC sent a draft ACL letter to USPHS and requested for public notice.	Shah Alam
8/25/1999	Update or Other Action	Public Notice period began. Public input will be accepted until September 24.	Shah Alam
9/25/1999	Update or Other Action	The Tanana Chiefs Conference and the Tanana Tribal Council provided inputs and both disagreed with the groundwater ACLs and the underlying assumption that shallow groundwater is not a drinking water source. The groundwater ACLs are based on a risk assessment (RA). The RA assumed that the shallow groundwater was not a drinking water source, consequently, risk due to ingestion was not considered. The RA, however, considered risks due to inhalation of vapors rising from the contaminated groundwater. The groundwater ACL for benzene considering only inhalation pathway is 160 ug/L. The groundwater cleanup level for benzene considering groundwater as drinking water source is 5 ug/L (Table C, 18 AAC 75).	Shah Alam
10/12/1999	Site Ranked Using the AHRM	Site reranked based on additional information gathered from site investigations and risk assessments.	Shah Alam
10/19/1999	Update or Other Action	The public notice posted to describe the ACLs and the proposed restrictions on the use of the shallow groundwater at the AANHS site in Tanana resulted in comments from two respondents. The Tanana Chiefs Conference and the Tanana Tribal Council both provided comments that did not agree with the groundwater ACLs and the underlying assumption that shallow groundwater is not a drinking water source. ADEC requested PHS in a letter to consider the comments from the above referenced respondents and address their issues in regards to the groundwater at this site.	Shah Alam
11/3/1999	Site Number Identifier Changed	Combined unique data from duplicate site, 1992310107601, into this Reckey.	Shah Alam
11/3/1999	Update or Other Action	USPHS (Dan Carpenter) informs ADEC via facsimile that USPHS does no longer have a contractual relationship with the contractor that prepared the site investigation/risk assessment and therefore cannot get an immediate response to the comments. USPHS hopes to initiate a request for a response in the near future. ADEC staff (Alam) forwarded the information to the Tanana Tribal Council and the Tanana Chiefs Conference.	Shah Alam
11/10/1999	Update or Other Action	Tanana Hospital Complex (LC 14624960) $11,908.18	Shah Alam
1/4/2000	Update or Other Action	USPHS responded to ADEC letter dated October 19, 1999 and submitted additional information on shallow contaminated groundwater.	Shah Alam
5/9/2000	Meeting or Teleconference Held	ADEC (Alam, Frechione), USPHS (Carpenter, Ott), Tanana Tribal Council (Erhart) and Tanana Chief's Conference (Wallis) held a meeting/teleconference on May 9, 2000. The objective was to discuss alternative groundwater cleanup levels. Both Erhart and Wallis previously responded during a public comment period stating that the groundwater underlying the Tanana Hospital is the only drinking water source for the community and should be cleaned up to the drinking water standards. Although located at a contaminated site, no contamination was detected at the only onsite drinking water well (Well D). Based on recently available groundwater exploration data, Alam interpreted that the shallow and the deep groundwater at this location possibly becomes one continuous aquifer near the Yukon River where no frozen soil is present to separate the shallow and the deep aquifers. All participants agreed that an alternative cleanup level of 160 ppb for benzene will be acceptable with an institutional control that the water at this location cannot be used for drinking until it meets drinking water standards. USPHS proposed to decommission the Well D. The hospital will use the City drinking water. The institutional control will be in place until contaminant concentrations in the groundwater meet 18 AAC 75 Table C values. Cleanup actions including free product recovery, stockpiled soil remediation, and, monitoring well sampling are planned for this summer.	Shah Alam
5/22/2000	Update or Other Action	Dan Carpenter (USPHS) confirmed that the USPHS property at the Tanana Health Center extends all the way to the Yukon River.	Shah Alam
5/26/2000	Cleanup Level(s) Approved	ADEC has determined the Alternative Cleanup Levels (ACL) in a letter dated May 26, 2000. ACL for GRO in soil is 1400 mg/kg and for DRO is 6000 mg/kg. ACL for benzene in groundwater is 160 ug/L. A risk assessment conducted in 1997 initially proposed these ACLs and ADEC solicited input from the public during a notice period from August to September 1999. The Tanana Chiefs Conference (TCC) and the Tanana Tribal Council (TTC) both commented and did not agree with the groundwater ACL for benzene and the underlying assumption that the shallow groundwater is not a drinking water source. On May 9, 2000, ADEC project manager discussed the groundwater cleanup levels with representatives of U.S. Public Health Service (USPHS), and TTC. All participants agreed that with institutional controls informing landowners of the possible risk associated with ingestion of the groundwater and providing alternative drinking water from offsite, the higher benzene cleanup level of 160 ug/L would be reasonable. The USPHS' representatives proposed that the onsite drinking water well "D" be decommissioned and that the AANHS facility would receive water from the Tanana City's drinking water supply system. Institutional controls are required until the most stringent soil (18 AAC 75, Method Two, Migration to Groundwater Pathway, Tables B1 and B2) and groundwater (18 AAC 75, Table C) cleanup levels are achieved. Groundwater monitoring will also be required at this site. Additional cleanup action(s) might be necessary if contaminant concentrations are not observed to be stable or decreasing.	Shah Alam
5/31/2000	Update or Other Action	Laboratory analysis of water samples collected from Well "D" between 5/14/1998 to 5/31/2000 indicated DRO and benzene below method reporting limits.	Shah Alam
6/15/2000	Meeting or Teleconference Held	Staff visited (June 13-15, 2000) Tanana Health Center contaminated site and attended a public meeting in Tanana. Meeting participants were U.S. Public Health Service, Tanana Tribal Council, Tanana City, Toogha Inc., Tozitna Corp, Tanana Power Company and ADEC. Staff responded to questions on cleanup levels, remediation methods (specifically, landfarming), offsite disposal of contaminated soils and free-product recovery. Tanana Tribal Council, as a consultant to U.S. Public Health Service, will submit a cleanup plan for ADEC review.	Shah Alam
6/29/2000	Update or Other Action	In a letter dated June 29, 2000, ADEC clarified cleanup related issues discussed in a public meeting held on June 14, 2000. ADEC also requested a site cleanup workplan.	Shah Alam
7/25/2000	Site Characterization Workplan Approved	Staff requested, in a letter date July 25, 2000, that two groundwater samples should be analyzed for PAHs using methods 8270C or 8310 for groundwater monitoring. This limited PAH analysis is in addition to DRO, GRO and BTEX for all monitoring wells. The sampling is scheduled to take place on September 2000.	Shah Alam
1/24/2001	Update or Other Action	Letter to D. Carpenter clarifying ground water sampling and need to access free product recoverability since free product is no longer detected. Installation of one additional monitoring well postponed pending additional ground water flow direction information.	Douglas Bauer
5/8/2001	Update or Other Action	Received ground water sampling work plan.	Douglas Bauer
5/17/2001	Update or Other Action	Ground water sampling plan approved.	Douglas Bauer
6/21/2001	Update or Other Action	Received facsimile from Tanana Tribal Council that TTC has terminated work on soil remediation work plan.	Douglas Bauer
8/13/2001	Preliminary Assessment Approved	EPA Superfund Technical Assessment and Response Team (START) file review and site inspection with environmental coordinator Herbie Edwin 8/13/2001. Surface and boring soil samples and on-site DW well water samples collected for lab analysis.	Bruce Wanstall
12/19/2001	Update or Other Action	Received Technical Memorandum Ground Water Sampling results.	Douglas Bauer
4/11/2002	Site Ranked Using the AHRM	Groundwater exposure changed from 1 to 2 reflecting documented contamination of drinking water source below Table C cleanup levels.	Bruce Wanstall
5/28/2002	Update or Other Action	Received ground water sampling work plan.	Douglas Bauer
5/29/2002	Update or Other Action	Ground water sampling plan approved.	Douglas Bauer
11/5/2003	Update or Other Action	Received letter from Tanana Tribal Council concerning stockpile of petroleum contaminated soils & apparent asbestos in old buildings. Copies forwarded to Dan Carpenter with PHS and John Pavitt with EPA Anchorage. Response letter sent Aug. 26, 2003.	Douglas Bauer
12/8/2003	Update or Other Action	Received an Engineering/Regulatory Evaluation of existing AST. PHS intends to demolish ASTs soon.	Douglas Bauer
12/10/2003	Update or Other Action	2003 Ground Water Monitoring Report received.	Douglas Bauer
2/12/2004	Update or Other Action	2004 Ground Water Monitoring work plan received.	Douglas Bauer
6/1/2005	Meeting or Teleconference Held	Met with Public Health Service engineers regarding plans for site and future issues.	Mike Jaynes
10/14/2005	Update or Other Action	Recieved monitoring well sampling report from Dan Carpenter. Two wells MW-7 and MW-14 could not be sampled. Results to be sent in future communications.	Mike Jaynes
11/25/2005	Update or Other Action	Issued extension letter for IHS petroleum contaminated soil stockpile.	Mike Jaynes
5/31/2006	Update or Other Action	Groundwater Monitoring sampling plan approved for 2006 work. Will need to take an overall "big picture" look for site to see the data trend.	Mike Jaynes
6/2/2006	Update or Other Action	2006 GW monitoring sampling plan approval sent out after discussion with Paul Geisert of IHS in Seattle.	Mike Jaynes
8/28/2006	Update or Other Action	New Cost Recovery Memo sent to Pamela Post at AG's office. Letter is on G drive at G:\SPAR\CS\Contaminated Site Files (38)\780 Tanana\780.38.003 IHS Old Tanana Hospital\Cost Recovery Memo Tanana Health Center 082806.doc	Mike Jaynes
10/18/2006	Meeting or Teleconference Held	Attended meeting in Tanana to discuss how IHS and village will move forward with the cleanup of the health center to facilitate transfer of the property. Proposed excavation of the site to alternative cleanup levels with landspreading of material at the designated landfill area.	Mike Jaynes
4/4/2007	Meeting or Teleconference Held	Contaminated Sites personnel participated in a multi-party teleconference organized by the Indian Health Service (IHS) to discuss long-term environmental restoration plans for the former IHS facilities in Tanana. Large volumes of petroleum-contaminated soil remain in place and temporarily stockpiled, with preliminary plans for treatment by landfarming within the City of Tanana landfill.	Colin Craven
5/9/2007	Meeting or Teleconference Held	Another multi-party teleconference was organized by the IHS to further discuss long-term environmental restoration plans for the former IHS facilities in Tanana. It appears that the city landfill is getting properly permitted for operations, allowing for use by the IHS as a landfarm for petroleum contaminated soil. Also, there was discussion of two old, unpermitted dumps in Tanana created by IHS. IHS personnel suggested that the landfills were probably not a source of contamination considering the results soil boring sampling within these dump areas, however, CS personnel recommended looking into historical records compilation, groundwater monitoring, and geophysical surveys for these areas.	Colin Craven
5/18/2007	GIS Position Updated	Updated locational data to be centered on the main former hospital building between 1st and 2nd avenues.	Colin Craven
5/30/2007	Meeting or Teleconference Held	Contaminated Sites staff attended a public meeting in Tanana hosted by the Indian Health Service (IHS). The IHS presented their long-term plans for building demolition and contaminated soil treatment. IHS representatives received severe criticism by members of the Tanana Tribal Council and public for their manner of decision making in formulating these plans. Plans for excavating petroleum contaminated soil from only the top three feet to the surface was not well received. DEC had already requested that IHS not use this approach, and reiterated this position at the meeting, to which the IHS had already agreed that a more targeted approach to remove the most grossly-contaminated soil was more appropriate.	Colin Craven
6/27/2007	Meeting or Teleconference Held	Follow up public meeting held in Tanana by the IHS. During the meeting it was stated the eventual goal was to transfer the land managed by the IHS to the Tanana Tribal Council with institutional controls in place via a quitclaim deed, although the IHS would retain the rights of access necessary to treat contaminated soil and perform groundwater monitoring. Also, during the discussion it became apparent that an old laundromat was located somewhere in the hospital campus, but it wasn't clear that it had been investigated for the release of solvents.	Colin Craven
7/5/2007	Update or Other Action	CS staff reviewed and provided comments on two documents: the draft 2006 groundwater monitoring report and the draft 2007 sampling and analysis plan for groundwater monitoring.	Colin Craven
9/24/2007	Update or Other Action	Contaminated Sites provided approval to the IHS (via email) for not conducting the 2007 round of groundwater monitoring to refocus resources on better defining long-term goals for the environmental restoration projects.	Colin Craven
4/2/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed. The petroleum releases have been ranked. Two other source areas: a former laundraumat, and a hazardous waste dump exist at the site. If data becomes available to suggest contamination associated with these source areas exists above cleanup levels, then these source areas will be ranked separately. Additionaly, DDT was documented in surface soil below the MTG cleanup level on site, and above MTG in surface soil adjacent to this property. Further characterization of this contaminant is recommended.	Kim DeRuyter
5/12/2008	Meeting or Teleconference Held	Met with Stephanie Nicholia and Kathleen Peters to discuss proposed IHS building demolition and contamination associated with the old tank farm and USTs at the site. Kathleen showed me the site and discussed drums and debris that will also need cleaned up during the site remediation efforts. The Village Council is concerned about the solid waste management plan proposed for the building removal.	Kim DeRuyter
7/16/2008	Site Characterization Report Approved	The 2006 Final Groundwater Monitoring Report was received by the department on October 29, 2007. The report was posted to the wrong file, and was recently located. The report was reviewed for comparison to comments to the 2007 Sampling and Analysis Plan documented in a letter to Paul Geisert Dated July 5, 2007. The Final report incorporated most of DEC’s comments, with the following exceptions: Comment 6, requested a description of the condition of the monitoring wells. Comment 7, requested repair and resurvey of the monitoring wells. Comment 8, requested that PAH analysis be added to the sampling protocol of the monitoring well with the highest contaminant level. Monitoring at the site is ongoing, and will be re-evaluated in light of planned building demolition and future remedial action. Building demolition may further damage, or necessitate closure of monitoring wells at the site. Subsequent to building demolition, DEC recommends a comprehensive evaluation of the potential contaminants of concern (COCs) at the site, and submittal of a new sampling and analysis plan reflecting known and potential COCs. At that time, damaged or decommissioned wells should be repaired or replaced and surveyed so that groundwater gradients can be accurately measured, and PAH sampling conducted.	Kim DeRuyter
10/1/2009	Update or Other Action	Contaminated Sites staff received an update on the Indian Health Service (IHS) Tanana site. It was hoped that the 2009 groundwater monitoring event would capture potential changes in contaminant concentrations resulting from this summer’s flood, but numerous monitoring wells were frozen during the early August sampling event. The former hospital building, maintenance garage, and generator buildings were demolished this summer. IHS will be working on a remedial action plan for the site this winter.	Kim DeRuyter
1/28/2010	Update or Other Action	Staff participated in the monthly project leadership team meeting. Kathleen Zuray looked into the land transfer status for the property near the landfill that the City wanted to use for a soil remediation site. The property transfer will not be finalized until well after the summer field season, so it was determined that the landfarm and stockpile would be located on the 14 acres the Tribe has set aside for soil remediation. Staff emphasized the a landfarm design with a sampling and analysis plan would need to be reviewed and approved prior to constuction of the land farm. ANTHC conducted a hazardous materials survey as part of this summers demolition project. Samples of the generator building slab detected low concentrations of PCBs. Staff is working with the Solid waste program to determine if the slab can be placed in the Tanana Landfill, but a decision will have to wait until the new Solid Waste Regulations are finalized.	Kim DeRuyter
9/16/2010	Meeting or Teleconference Held	Staff participated in the monthly project leadership team call. Kathleen informed the group about the status of the slab removal. It has been containerized and is waiting for the September 20 barge. An EPA disposal number is pending. Discussion also led to the next steps toward Phase 2 of the project. The final date for deliverables in Phase 1 is October 20. IHS and TTC will work on a Work Plan for Phase 2 this fall/winter.	Meghan Dooley
8/26/2011	Site Characterization Workplan Approved	DEC received the draft Soil Sampling and Analysis Plan on August 17, 2011. Comments were sent on August 19, 2011. The final Soil Sampling and Analysis Plan was approved on August 26, 2011. The plan calls for using a grid sampling approach to characterize the Building 303 area for any potential PCB contamination in the soil. Additionally, the plan calls for completing soil borings at 4 different locations throughout the rest of the former hospital site to characterize petroleum contamination in the subsurface. Samples will be collected at 10, 20, and 30 feet below ground surface at buildings 301, 311, 312, and 314. Samples will be analyzed for some or all of the following: petroleum, benzene, toluene, ethylbenze, and xylene (BTEX), poly cyclic aromatic hydrocarbons (PAH), volatile organic carbon (VOC), and chlorinated solvents. Samples will also be collected at a nearby site to determine existing soil conditions. The Indian Health Service plans to create a landfarm in the future in order to remediate petroleum contaminated soil.	Meghan Dooley
12/28/2011	Document, Report, or Work plan Review - other	ADEC reviewed and sent comments on the draft Groundwater Monitoring Analytical Results. 5 wells were sampled for DRO, GRO, RRO, PAH and VOCs. It was discovered that 8 wells were either missing or damaged and the groundwater at 1 well was too deep to sample with the equipment present at the time. DRO was detected at MW-01, all other analytes were below cleanup levels.	Meghan Dooley
12/28/2011	Document, Report, or Work plan Review - other	ADEC reviewed and commented on the draft Soil Sampling Analytical Results for the Hospital site. Samples were collected at four locations and analyzed for petroleum hydrocarbons, VOCs, and PAH. The former vehicle maintenance building was sampled for arsenic and lead. The building 303 site was sampled for PCBs.	Meghan Dooley
5/8/2012	Document, Report, or Work plan Review - other	ADEC sent additional comments on the revised Soil Sampling Report and the revised Groundwater Monitoring Report.	Meghan Dooley
9/13/2012	Document, Report, or Work plan Review - other	ADEC approved of the 2011 Soil Sampling and Groundwater Monitoring Analytical Results reports.	Meghan Dooley
5/1/2013	Document, Report, or Work plan Review - other	ADEC sent comments on the draft Removal Action Report for the 2012 Field Season - Zone 4.	Meghan Dooley
6/20/2013	Site Visit	CS staff attended a meeting with the Indian Health Service, the Tribe, and the consultant conducting the remedial efforts at the hospital site. Endpoint goals were discussed and CS staff also toured the excavation site and the landfarm.	Meghan Dooley
1/23/2014	Update or Other Action	Received on July 22, 2013- Draft Removal Action Report for the 2012 Field Season-Zone 4, Former AANHS Hospital Site.	Meredith Savage
1/23/2014	Update or Other Action	Conference call held with IHS Michael Weaver regarding status of Tanana Hospital sites. Summary: -IHS will be sending in a draft report for Areas 1, 2, & 3; requests that ADEC comment on all areas, including earlier draft for Area 4. -IHS agreed to excavate to maximum depth of 15' bgs, or less if possible. -All potentially contaminated soils (PCS) have been hauled to the Remediation Treatment Area (RTA), however, the PCS may be moved back to the landfill site (at Alternative Clean-up levels); Tribe will maintain RTA. -Damaged groundwater monitoring wells will be replaced in 2014. -Vapor intrusion monitoring will occur in 2014. -IHS is hoping for a No Further Action with ICs designation in Fall of 2014. -Tribe wants this site transferred (to Tribe), ultimately.	Meredith Savage
5/2/2014	Document, Report, or Work plan Review - other	ADEC reviewed and commented on the draft 2012 Field Season Removal Action Report (recieved 7/22/2013) and the draft 2013 Field Season Removal Action Report (received 3/18/2014)for the Former AANHS Hospital site. There are four cleanup zones identified at the site- the 2012 removal action (RA)report dealt with Zone 4 and the 2013 RA report dealt with Zones 1, 2, and 3. IHS had requested in fall 2013 that the 2012 and 2013 reports be reviewed together. 2012: Zone 4 RA entailed the sampling and subsequent excavation of petroleum contaminated soil in two areas north of 2nd Ave. (Former Tank Farm Area and Former Maintenance Building), sampling of two soil piles on site, and construction of a remediation treatment area (RTA) off site (area approx. 3 acres). Contaminants of concern (COC) for all zones at the Hospital site include petroleum hydrocarbons (DRO, RRO, GRO), VOCs, PAHs, PCBs, and selected metals. The Tank Farm area was excavated to a depth of 15' below ground surface (bgs) and confirmation sample results at this depth were below alternative cleanup levels (ACLs). The Mantenance Bldg. area was also excavated to 15'bgs; confirmation sample results for petroleum concentrations were below ACLs, but above for TCE. No further excavation is planned. All excavated material was taken to the RTA. Additional sampling of soil piles was planned for 2013. 2013: Zones 1-3 are located south of 2nd Ave. Sampling and excavation of contaminated soils was conducted in multiple areas within these three zones. Soil was excavated to a maximum depth of 15' bgs. Soil above the ACLs remain at three confirmation sample locations in Zone 1 (former tank locations) and three confirmation sample locations in Zone 3 (former hospital building). No further excavation or remediation was recommended. Groundwater monitoring will continue on this site and soil vapor monitoring wells will be installed in 2014. The two on-site soil piles received additional sampling in 2013 and all samples were below ACLs. The RTA was expanded by a little over 1/2 acre.	Meredith Savage
6/4/2014	Meeting or Teleconference Held	A conference call was held between ADEC (Meredith Savage) and IHS (Michael Weaver)to discuss ADEC comments and IHS responses regarding the 2012 and 2013 remedial action reports. ADEC questioned the use of 100ppm as a screening level for the PID, the number of confirmation samples taken, and the fact that excavation was stopped at 15' bgs, regardless of presence of contamination. An agreement was not reached and a second conference call was scheduled.	Meredith Savage
6/11/2014	Meeting or Teleconference Held	A conference call was held between John Halverson and Meredith Savage (ADEC), Michael Weaver (IHS), and Paul Bianco (Ridolfi) to discuss ADEC issues with the 2012 and 2013 RA reports. ADEC requested that additional confirmation samples be taken from Zone 1. Agreement was reached regarding the relocation of several groundwater monitoring wells and the addition of other GW wells in 2014 so as to better assess the extent of the contaminant plume. Also agreed upon were the locations and number of vapor monitoring wells to be installed during the 2014 field season.	Meredith Savage
7/8/2014	Site Visit	Met onsite with Michael Weaver of IHS (WA area), Paula Poncho of IHS (AK area), Shannon Erhart (Tanana Tribal Council), and Paul Bianco of Ridolfi. Viewed excavation areas, groundwater monitoring wells, and vapor monitoring wells.	Meredith Savage
7/28/2014	Document, Report, or Work plan Review - other	Received memorandum titled 2014 Groundwater, Soil Vapor, Soil, and Water Treatment System Sampling at the Former IHS Hospital Site at Tanana, Alaska. The memorandum serves as an addendum to the 2011 Groundwater Sampling and Analysis Plan, the 2012 Vapor Intrusion Evaluation Plan, and the 2012 Soil Remediation Plan. The memorandum details the sampling to be conducted at 14 groundwater monitoring wells, 14 soil vapor monitoring points, and the Remediation Treatment Area (soil), and provides the analyses to be performed on each set of samples.	Meredith Savage
8/8/2014	Document, Report, or Work plan Review - other	ADEC approves memorandum titled 2014 Groundwater, Soil Vapor, Soil, and Water Treatment System Sampling at the Former HIS Hospital Site at Tanana, Alaska.	Meredith Savage
2/25/2015	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (ADEC) received a report titled Removal Action Report for the 2012 Field Season – Zone 4, Former AANHS Hospital Site – Native Village of Tanana on January 15, 2015. The report addresses construction of a remediation treatment area (RTA), excavation of petroleum contaminated soil from Zone 4 of the AANHS Hospital project site, transport of soil to the RTA, and soil sampling as laid out in the Soil Remediation Plan. (See above comments provided on 5/02/2014) ADEC has reviewed this report and accepts it as final with the understanding that the 2013 and 2014 reports will address the additional lateral excavation required for the maintenance building, additional sampling of the stockpiles, and excavation of DRO contaminated soil at the former generator building.	Meredith Savage
4/21/2015	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (ADEC) received a memorandum titled 2015 Sampling of Soil Vapor and Indoor Air at the Former IHS Hospital Site at Tanana, Alaska on April 21, 2015. The memo provides the soil vapor and indoor air sampling strategy for the 2015 field season within the Tanana Hospital project area. Because the proposed work to be done at this site has not changed from the ADEC approved 2012 Vapor Intrusion Evaluation Plan, ADEC agreed that a memorandum would suffice in lieu of a duplicate work plan. Fourteen soil vapor samples and 17 indoor air samples (plus requisite duplicates) will be collected and analyzed for gasoline range organics (GRO), diesel range organics (DRO), and volatile organic compounds (VOC).	Meredith Savage
8/12/2015	Update or Other Action	Transfer to Fairbanks	Susan Carberry
6/9/2016	Site Visit	DEC performed a site visit at all IHS Tanana sites and the Remediation Treatment Area. The site status for each area was discussed with IHS and Tanana representatives.	Monte Garroutte
1/9/2018	Document, Report, or Work plan Review - other	DEC Approved the Former Indian Health Services Hospital Site Remediation Treatment Area Soil Remediation Work Plan. The work plan provides detailed plans and procedures for future landfarm operations, maintenance, monitoring (OM&M), and closure at the remediation treatment area (RTA) in Tanana, Alaska.	Monte Garroutte
3/1/2019	Update or Other Action	On March 1, 2019 I reviewed a letter and Interim Report from Ahtna with ISM sample results form the RTA. Results indicate that the top 10-inches of soil (a tilled lift) in the northern half of the landfarm (Decision Unit [DU]-1) meets the SRTLs and cumulative risk does not exceed permissible levels. To allow for unrestricted use, SRTLs are the most stringent 18 AAC 75.341 Method Two, Tables B1 and B2 Soil Cleanup Levels (SCLs). On August 20, 2108, ADEC approved the transport of approximately 1,200 cubic yards (CY) of soil from the landfarm to the borrow pit staging area for reuse by the City of Tanana. The southern half of the landfarm (DU-2) did not meet the SRTLs and will need additional tilling and fertilizer application. On March first I contacted the RP (Tanana Tribal Council; Kathleen Peters-Zuray) introduced myself as the current PM and requested the Operations, Maintenance and Monitoring (OM&M)Report for 2017-2018 and updates on Plans for 2019 work. Ms. Peters-Zuray responded that she would have the contractor (Ahtna) send me the most recent report.	John O'Brien
3/28/2019	Update or Other Action	The 2018 Draft Operations, Maintenance, and Monitoring Report for the RTA was received on March 27,2019. Review comments were provided by ADEC on March 28, 2019.	John O'Brien
6/18/2019	Update or Other Action	Final Remediation Summary Report Approved.	John O'Brien
8/28/2019	Document, Report, or Work plan Review - other	DEC approved the Final Work Plan, Building 302 Contaminated Soil Removal, Former Indian Health Services Hospital Site, Tanana, Alaska, dated August 2019.This document details upcoming work at Building 302 of the former Indian Health Services Hospital in Tanana, Alaska. Work planned includes excavation, X-ray fluorescence analyzer field screening, and confirmation sampling of lead-contaminated soil at Building 302. Lead-contaminated soil above cleanup levels will be placed in supersacks and barged to an appropriate disposal facility. Additionally, work may include removal of up to 10 cubic yards of petroleum-contaminated soil (if contamination is encountered) from the pulling of an unregulated underground storage tank, to be placed in the Tanana soil remediation treatment area.	Kevin Fraley
6/8/2020	Document, Report, or Work plan Review - other	DEC approved the Final 2019 LTM Report. Field activities took place in July and September 2019. This included groundwater and pore water sampling efforts, as well as soil gas sampling via vapor wells at the remaining structures near the groundwater plumes. Monitoring wells inside of the plume boundaries showed exceedances for several COCs. Monitoring wells located outside of plume boundaries were below groundwater cleanup levels for all COCs. Pore water samples all fell below surface water cleanup levels as well. Vapor well sampling showed no COCs greater than target levels in soils next to building foundations. Recommended continued biannual groundwater sampling to allow for MK trend analysis, as well as decommissioning of the monitoring wells outside of the groundwater plumes. Site-wide cumulative risk evaluation to be done after field season efforts in 2020.	Tim Sharp
7/7/2020	Document, Report, or Work plan Review - other	DEC approved the Final 2019 RTA Op, Maintenance and Monitoring Report. The report discusses sampling of leachate treatment system effluent and surface soil sampling. Chloroform was detected above Table C and MTG cleanup levels, and is possibly attributed to the secondary GAC filter tank being treated with chlorinated detergents prior to installation. The report recommends further sampling of the filter and tank, followed by replacement of the contaminated portions of the system. The report also recommends regular tilling of the nearby land farm throughout the 2020 field season.	Tim Sharp
9/18/2020	Update or Other Action	DEC approved a FCF to allow for further transport of contaminated soil to the RTA - from the previously approved 10 cy to 40 cy. Confirmation sampling will be done according to the work plan and guidance documents	Tim Sharp
1/28/2021	Update or Other Action	DEC received the draft B302 Contaminated Soil Removal Report	Tim Sharp
2/5/2021	Document, Report, or Work plan Review - other	DEC sent comments to IHS for the Draft B302 Contaminated Soil Removal Report. The report details removal and disposal of lead contaminated soil found around the B302 footprint. The report also discusses removal of a 500-gallon UST and removal of fuel-impacted soil to the RTA. Confirmation samples collected from sidewalls and floors of excavation showed all COCs fell below MTG CULs. The Report recommends NFA is necessary at B302 location.	Tim Sharp
2/18/2021	Document, Report, or Work plan Review - other	DEC approved the final B302 Soil Removal Report, which was largely similar to the draft report	Tim Sharp
4/20/2021	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 71096 Indian Health Service-Petroleum Sources.	Tim Sharp
5/3/2021	Document, Report, or Work plan Review - other	DEC sent comments on the 2020 LTM Draft Report. Groundwater samples were collected in July and November 2020. Multiple COCs were detected above cleanup levels, and bias was detected as cross contamination between samples was a factor in the data. The report also recommended evaluation for a cleanup complete with ICs determination to facilitate land transfer. Due to uncertain contaminant trends and the levels of contamination in groundwater, a CC w/ ICs determination is not recommended by DEC.	Tim Sharp
6/1/2021	Document, Report, or Work plan Review - other	DEC approved the Final 2020 LTM Report. Eleven COCs were detected above Table C from wells inside the two groundwater plumes. Several results, most notably RRO, were flagged as estimated with a high bias due to cross-contamination. The report recommended further sampling, scheduled for every three years until COC concentrations drop below Table C for at least two consecutive sampling events.	Tim Sharp
6/15/2021	Document, Report, or Work plan Review - other	DEC Approved the 2021 Addendum to the 2018 RTA Work Plan. This document proposes sampling soil for chloroform and calculating a Method Three ACL. IHS will also separate the RTA into four decision units rather than 2 and sample 50 increments instead of 30 for ISM. They aim to use these data to determine the best additive to use to expedite RTA soil remediation.	Tim Sharp
8/2/2021	Meeting or Teleconference Held	DEC CS and PPR held a meeting with TTC, Arctic Data Services, and Ahtna to discuss the used oil releases discovered during Arctic Data Services' site visit. Releases are to the north and west of Building 321 and consist of buckets, a half drum on a pallet, and IBC tanks (though no current IBC tanks show evidence of ongoing leakage, heavy staining was present in this location). Arctic Data Services will prepare a work plan for characterization and sampling of other waste in the area (transformers, other potential hazardous materials). As the field season is over the hill at this point, DEC will prioritize evaluating a work plan as expediently as possible. Initial work will go through PPR, and if PPR deems necessary the release will be added to this site as a new source area.	Tim Sharp
4/15/2022	Document, Report, or Work plan Review - other	DEC sent comments on the Draft RTA OM&M Report. Sample results from the leachate treatment system were below Table C. ISM sampling from all three decision units within the RTA were below the most stringent cleanup levels. Additionally, sample results from the contaminated granular activated carbon (GAC) filter were below the toxic characteristic leaching procedure (TCLP) limit, and soil samples for chloroform from this area were below the calculated site-specific alternative cleanup level. The report recommends removing ten inches of treated soil to be used in landfill expansion, as well as continued tilling of the landfarm.	Tim Sharp
5/18/2022	Document, Report, or Work plan Review - other	DEC approved the Final 2021 RTA Operations, Maintenance, and Monitoring (OM&M) Report. IHS will gain approval from the Solid Waste Program and the City of Tanana before placing remediated soil in the former gravel pit between the landfarm and landfill, per the RTA Soil Remediation Work Plan.	Tim Sharp
12/27/2022	Update or Other Action	The 117th Congress passed Public Law 117-266 on December 27, 2022. The law specifies "As soon as practicable, but not later than 180 days, after the date of the enactment of this Act, the Secretary shall convey to the Council all right, title, and interest of the United States in and to the property described in paragraph (2) for use in connection with health and social services programs."	Jamie McKellar
2/27/2023	Update or Other Action	CLARIFICATION REGARDING CLEANUP LEVELS: On May 26, 2000, DEC issued a letter approving alternative cleanup levels (ACLs) for GRO, DRO, Arsenic, Benzene, Toluene, Ethylbenzene, Xylenes, Naphthalene, Bis(2-ethylhexyl)phthalate, n-Butylbenzene, Cadmium, Chloroform, Chloromethane, and Mercury. Since the ACLs were issued in 2000, there have been multiple regulations updates. Some of the approved ACLs are more stringent than the current 18 AAC 75 Table B1 cleanup levels and others exceed the current 18 AAC 75 Table B1 maximum allowable concentrations.	Jamie McKellar
3/28/2023	Meeting or Teleconference Held	Representatives from DEC, Arctic Data Services, Ahtna, Indian Health Services, and the Tanana Tribal Council met to discuss the upcoming federally-mandated land transfer.	Jamie McKellar
4/27/2023	Document, Report, or Work plan Review - other	REPORT APPROVAL: 2022 Remediation Treatment Area Operations, Maintenance, and Monitoring Report Former Indian Health Service Hospital Site, Tanana, AK (Ahtna Engineering Services, LLC, March 2023)	Jamie McKellar
6/20/2023	Institutional Control Update	On June 20, 2023, DEC's Commissioner signed an Environmental Covenant for Lot 12, U.S. Survey 5958, T4N, R22W, Fairbanks Meridian, Alaska. This Covenant subjects the Property to certain activity and use limitations for the property including restrictions on groundwater use and excavations, and notification requirements for construction activities. A copy of the final, signed covenant is attached to the database.	Jamie McKellar
8/16/2023	Document, Report, or Work plan Review - other	WORK PLAN APPROVED: DEC Approval of 2023 Long-Term Monitoring Work Plan Former Indian Health Service Hospital Site, Tanana, Alaska. Dated July 2023.	Jamie McKellar
9/15/2023	Document, Report, or Work plan Review - other	WORK PLAN APPROVED: DEC Approved the 2023–2025 Landfarm Operations, Maintenance, and Monitoring, Remediation Treatment Area Work Plan (Arctic Data Services, August 2023).	Jamie McKellar
12/8/2023	Institutional Control Record Established	Institutional Controls established and entered into the database.	Sophia Bracio

Action Date

Action

Description

DEC Staff

1/20/1975

Update or Other Action

(Old R:Base Action Code = FI - Field Inspection (General)). 3 water samples collected by Office of Environmental Health between 1/15/75 and 1/18/75. 0.2 to 2.0 ppm (? units) oil and grease detected.

Former Staff

1/1/1976

Interim Removal Action Approved

(Old R:Base Action Code = AWS - Alternative Water Supply (General)). New well installed sometime in 1976. Well is 97 feet deep. Contaminated well abandoned.

Former Staff

1/25/1982

Update or Other Action

(Old R:Base Action Code = FI - Field Inspection (General)). Site visit following spill on 12/29/81 of approximately 2500 gallons heating oil. ADEC recommended putting saturated gravel in bermed and lined area until summer, and then using it for road surfacing.

Former Staff

1/18/1985

Update or Other Action

(Old R:Base Action Code = FI - Field Inspection (General)). Water sample from clinic on 12/20/84 by Office of Environmental Health showed no detected BTEX (taken after recent oil spill at pumphouse and sample by Northern Testing indicating 280 ppb weathered gasoline).

Former Staff

6/1/1990

Site Number Identifier Changed

Old Reckey 198231013632 and 823103632.

Former Staff

11/19/1990

Site Ranked Using the AHRM

Initial ranking.

Former Staff

6/5/1992

Interim Removal Action Approved

Contaminated soils excavated and stockpiled during excavation for school building addition foundation installation.

Dan Basketfield

6/12/1992

Preliminary Assessment Approved

(Old R:Base Action Code = SA1 - Phase I Site Assessment (General)). 6/91 Hazcon of Seattle surveyed soil contamination at 17 tank sites and pipeline for USPHS. Extensive and intensive contamination was found at depths to 5.3 feet (limit of boreheads). Most of these are probably asssociated with over fills.

Former Staff

6/30/1992

Site Added to Database

Former Staff

6/18/1993

Update or Other Action

(Old R:Base Action Code = RPS - Responsible Party Search). Sent letter to Dalton Woodford of Alaska Area Native Health Service advising him of RP status. Information request included. Requested to empty unused tanks, test used tanks, develop release investigation plan ASAP and submit Corrective Action plan following release investigation. Reply within 30 days.

Don Gibler

1/14/1994

Update or Other Action

(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to RP requesting update and more environmental information. RP responded with completed information form.

Jeff Peterson

8/8/1994

Site Ranked Using the AHRM

Reranked. (Current drinking water source not contaminated).

Former Staff

5/11/1995

Site Characterization Report Approved

(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Reviewed 4/95 "Site Investigation Report." 1994 - removed some USTs, ASTs and 1,100 feet of pipeline. 5 USTs, 8 ASTs, tank farm and fill line from Yukon River to tank farm remain from initial install. Extensive SB analysis to vadose zone (15 feet) indicate possible GW contaminated Estimate 6,500 cubic yards contaminated soil. Floor drain needs to be addressed. Plans: investigate GW by microwell tech., risk assessmt. or risk screening, remove soil 3-5 feet below ground surface, remediate possibly by Hot Air Vapor Extraction.

Eleanor Hung

6/12/1995

Meeting or Teleconference Held

Met with ADCOE, IHS,& USPHS regarding further investigation, cleanup plans and E&E 4/95 investigation report. Issues omitted from report that need to be addressed: UIC-old floor drain(s) in garage (EPA notified by DEC), use EPA Method 502.2 for all active drinking water wells, inactive wells Method 602,inform how IDWs being disposed of. One regulated UST (emergency generator) will have separate file.

Eleanor Hung

4/3/1997

Update or Other Action

ADEC received a Site Investigation Report Phase II dated March 1997. The report contained a site specific risk assessment.

Shah Alam

7/23/1997

Update or Other Action

ADEC provided comments to RA.

Shah Alam

10/27/1997

Update or Other Action

ADEC received responses to RA comments.

Shah Alam

6/9/1999

Update or Other Action

ADEC/CS Staff (Alam) discussed Tanana Hospital UST closure report with ADEC/STP Staff (Steve Bainbridge). Agreed that no need to issue a closure report for USTs. Contaminated Sites ACLs will be applicable to the UST contaminated soils and GW.

Shah Alam

7/29/1999

Update or Other Action

ADEC sent a draft ACL letter to USPHS and requested for public notice.

Shah Alam

8/25/1999

Update or Other Action

Public Notice period began. Public input will be accepted until September 24.

Shah Alam

9/25/1999

Update or Other Action

The Tanana Chiefs Conference and the Tanana Tribal Council provided inputs and both disagreed with the groundwater ACLs and the underlying assumption that shallow groundwater is not a drinking water source. The groundwater ACLs are based on a risk assessment (RA). The RA assumed that the shallow groundwater was not a drinking water source, consequently, risk due to ingestion was not considered. The RA, however, considered risks due to inhalation of vapors rising from the contaminated groundwater. The groundwater ACL for benzene considering only inhalation pathway is 160 ug/L. The groundwater cleanup level for benzene considering groundwater as drinking water source is 5 ug/L (Table C, 18 AAC 75).

Shah Alam

10/12/1999

Site Ranked Using the AHRM

Site reranked based on additional information gathered from site investigations and risk assessments.

Shah Alam

10/19/1999

Update or Other Action

The public notice posted to describe the ACLs and the proposed restrictions on the use of the shallow groundwater at the AANHS site in Tanana resulted in comments from two respondents. The Tanana Chiefs Conference and the Tanana Tribal Council both provided comments that did not agree with the groundwater ACLs and the underlying assumption that shallow groundwater is not a drinking water source. ADEC requested PHS in a letter to consider the comments from the above referenced respondents and address their issues in regards to the groundwater at this site.

Shah Alam

11/3/1999

Site Number Identifier Changed

Combined unique data from duplicate site, 1992310107601, into this Reckey.

Shah Alam

11/3/1999

Update or Other Action

USPHS (Dan Carpenter) informs ADEC via facsimile that USPHS does no longer have a contractual relationship with the contractor that prepared the site investigation/risk assessment and therefore cannot get an immediate response to the comments. USPHS hopes to initiate a request for a response in the near future. ADEC staff (Alam) forwarded the information to the Tanana Tribal Council and the Tanana Chiefs Conference.

Shah Alam

11/10/1999

Update or Other Action

Tanana Hospital Complex (LC 14624960) $11,908.18

Shah Alam

1/4/2000

Update or Other Action

USPHS responded to ADEC letter dated October 19, 1999 and submitted additional information on shallow contaminated groundwater.

Shah Alam

5/9/2000

Meeting or Teleconference Held

ADEC (Alam, Frechione), USPHS (Carpenter, Ott), Tanana Tribal Council (Erhart) and Tanana Chief's Conference (Wallis) held a meeting/teleconference on May 9, 2000. The objective was to discuss alternative groundwater cleanup levels. Both Erhart and Wallis previously responded during a public comment period stating that the groundwater underlying the Tanana Hospital is the only drinking water source for the community and should be cleaned up to the drinking water standards. Although located at a contaminated site, no contamination was detected at the only onsite drinking water well (Well D). Based on recently available groundwater exploration data, Alam interpreted that the shallow and the deep groundwater at this location possibly becomes one continuous aquifer near the Yukon River where no frozen soil is present to separate the shallow and the deep aquifers. All participants agreed that an alternative cleanup level of 160 ppb for benzene will be acceptable with an institutional control that the water at this location cannot be used for drinking until it meets drinking water standards. USPHS proposed to decommission the Well D. The hospital will use the City drinking water. The institutional control will be in place until contaminant concentrations in the groundwater meet 18 AAC 75 Table C values. Cleanup actions including free product recovery, stockpiled soil remediation, and, monitoring well sampling are planned for this summer.

Shah Alam

5/22/2000

Update or Other Action

Dan Carpenter (USPHS) confirmed that the USPHS property at the Tanana Health Center extends all the way to the Yukon River.

Shah Alam

5/26/2000

Cleanup Level(s) Approved

ADEC has determined the Alternative Cleanup Levels (ACL) in a letter dated May 26, 2000. ACL for GRO in soil is 1400 mg/kg and for DRO is 6000 mg/kg. ACL for benzene in groundwater is 160 ug/L. A risk assessment conducted in 1997 initially proposed these ACLs and ADEC solicited input from the public during a notice period from August to September 1999. The Tanana Chiefs Conference (TCC) and the Tanana Tribal Council (TTC) both commented and did not agree with the groundwater ACL for benzene and the underlying assumption that the shallow groundwater is not a drinking water source. On May 9, 2000, ADEC project manager discussed the groundwater cleanup levels with representatives of U.S. Public Health Service (USPHS), and TTC. All participants agreed that with institutional controls informing landowners of the possible risk associated with ingestion of the groundwater and providing alternative drinking water from offsite, the higher benzene cleanup level of 160 ug/L would be reasonable. The USPHS' representatives proposed that the onsite drinking water well "D" be decommissioned and that the AANHS facility would receive water from the Tanana City's drinking water supply system. Institutional controls are required until the most stringent soil (18 AAC 75, Method Two, Migration to Groundwater Pathway, Tables B1 and B2) and groundwater (18 AAC 75, Table C) cleanup levels are achieved. Groundwater monitoring will also be required at this site. Additional cleanup action(s) might be necessary if contaminant concentrations are not observed to be stable or decreasing.

Shah Alam

5/31/2000

Update or Other Action

Laboratory analysis of water samples collected from Well "D" between 5/14/1998 to 5/31/2000 indicated DRO and benzene below method reporting limits.

Shah Alam

6/15/2000

Meeting or Teleconference Held

Staff visited (June 13-15, 2000) Tanana Health Center contaminated site and attended a public meeting in Tanana. Meeting participants were U.S. Public Health Service, Tanana Tribal Council, Tanana City, Toogha Inc., Tozitna Corp, Tanana Power Company and ADEC. Staff responded to questions on cleanup levels, remediation methods (specifically, landfarming), offsite disposal of contaminated soils and free-product recovery. Tanana Tribal Council, as a consultant to U.S. Public Health Service, will submit a cleanup plan for ADEC review.

Shah Alam

6/29/2000

Update or Other Action

In a letter dated June 29, 2000, ADEC clarified cleanup related issues discussed in a public meeting held on June 14, 2000. ADEC also requested a site cleanup workplan.

Shah Alam

7/25/2000

Site Characterization Workplan Approved

Staff requested, in a letter date July 25, 2000, that two groundwater samples should be analyzed for PAHs using methods 8270C or 8310 for groundwater monitoring. This limited PAH analysis is in addition to DRO, GRO and BTEX for all monitoring wells. The sampling is scheduled to take place on September 2000.

Shah Alam

1/24/2001

Update or Other Action

Letter to D. Carpenter clarifying ground water sampling and need to access free product recoverability since free product is no longer detected. Installation of one additional monitoring well postponed pending additional ground water flow direction information.

Douglas Bauer

5/8/2001

Update or Other Action

Received ground water sampling work plan.

Douglas Bauer

5/17/2001

Update or Other Action

Ground water sampling plan approved.

Douglas Bauer

6/21/2001

Update or Other Action

Received facsimile from Tanana Tribal Council that TTC has terminated work on soil remediation work plan.

Douglas Bauer

8/13/2001

Preliminary Assessment Approved

EPA Superfund Technical Assessment and Response Team (START) file review and site inspection with environmental coordinator Herbie Edwin 8/13/2001. Surface and boring soil samples and on-site DW well water samples collected for lab analysis.

Bruce Wanstall

12/19/2001

Update or Other Action

Received Technical Memorandum Ground Water Sampling results.

Douglas Bauer

4/11/2002

Site Ranked Using the AHRM

Groundwater exposure changed from 1 to 2 reflecting documented contamination of drinking water source below Table C cleanup levels.

Bruce Wanstall

5/28/2002

Update or Other Action

Received ground water sampling work plan.

Douglas Bauer

5/29/2002

Update or Other Action

Ground water sampling plan approved.

Douglas Bauer

11/5/2003

Update or Other Action

Received letter from Tanana Tribal Council concerning stockpile of petroleum contaminated soils & apparent asbestos in old buildings. Copies forwarded to Dan Carpenter with PHS and John Pavitt with EPA Anchorage. Response letter sent Aug. 26, 2003.

Douglas Bauer

12/8/2003

Update or Other Action

Received an Engineering/Regulatory Evaluation of existing AST. PHS intends to demolish ASTs soon.

Douglas Bauer

12/10/2003

Update or Other Action

2003 Ground Water Monitoring Report received.

Douglas Bauer

2/12/2004

Update or Other Action

2004 Ground Water Monitoring work plan received.

Douglas Bauer

6/1/2005

Meeting or Teleconference Held

Met with Public Health Service engineers regarding plans for site and future issues.

Mike Jaynes

10/14/2005

Update or Other Action

Recieved monitoring well sampling report from Dan Carpenter. Two wells MW-7 and MW-14 could not be sampled. Results to be sent in future communications.

Mike Jaynes

11/25/2005

Update or Other Action

Issued extension letter for IHS petroleum contaminated soil stockpile.

Mike Jaynes

5/31/2006

Update or Other Action

Groundwater Monitoring sampling plan approved for 2006 work. Will need to take an overall "big picture" look for site to see the data trend.

Mike Jaynes

6/2/2006

Update or Other Action

2006 GW monitoring sampling plan approval sent out after discussion with Paul Geisert of IHS in Seattle.

Mike Jaynes

8/28/2006

Update or Other Action

New Cost Recovery Memo sent to Pamela Post at AG's office. Letter is on G drive at G:\SPAR\CS\Contaminated Site Files (38)\780 Tanana\780.38.003 IHS Old Tanana Hospital\Cost Recovery Memo Tanana Health Center 082806.doc

Mike Jaynes

10/18/2006

Meeting or Teleconference Held

Attended meeting in Tanana to discuss how IHS and village will move forward with the cleanup of the health center to facilitate transfer of the property. Proposed excavation of the site to alternative cleanup levels with landspreading of material at the designated landfill area.

Mike Jaynes

4/4/2007

Meeting or Teleconference Held

Contaminated Sites personnel participated in a multi-party teleconference organized by the Indian Health Service (IHS) to discuss long-term environmental restoration plans for the former IHS facilities in Tanana. Large volumes of petroleum-contaminated soil remain in place and temporarily stockpiled, with preliminary plans for treatment by landfarming within the City of Tanana landfill.

Colin Craven

5/9/2007

Meeting or Teleconference Held

Another multi-party teleconference was organized by the IHS to further discuss long-term environmental restoration plans for the former IHS facilities in Tanana. It appears that the city landfill is getting properly permitted for operations, allowing for use by the IHS as a landfarm for petroleum contaminated soil. Also, there was discussion of two old, unpermitted dumps in Tanana created by IHS. IHS personnel suggested that the landfills were probably not a source of contamination considering the results soil boring sampling within these dump areas, however, CS personnel recommended looking into historical records compilation, groundwater monitoring, and geophysical surveys for these areas.

Colin Craven

5/18/2007

GIS Position Updated

Updated locational data to be centered on the main former hospital building between 1st and 2nd avenues.

Colin Craven

5/30/2007

Meeting or Teleconference Held

Contaminated Sites staff attended a public meeting in Tanana hosted by the Indian Health Service (IHS). The IHS presented their long-term plans for building demolition and contaminated soil treatment. IHS representatives received severe criticism by members of the Tanana Tribal Council and public for their manner of decision making in formulating these plans. Plans for excavating petroleum contaminated soil from only the top three feet to the surface was not well received. DEC had already requested that IHS not use this approach, and reiterated this position at the meeting, to which the IHS had already agreed that a more targeted approach to remove the most grossly-contaminated soil was more appropriate.

Colin Craven

6/27/2007

Meeting or Teleconference Held

Follow up public meeting held in Tanana by the IHS. During the meeting it was stated the eventual goal was to transfer the land managed by the IHS to the Tanana Tribal Council with institutional controls in place via a quitclaim deed, although the IHS would retain the rights of access necessary to treat contaminated soil and perform groundwater monitoring. Also, during the discussion it became apparent that an old laundromat was located somewhere in the hospital campus, but it wasn't clear that it had been investigated for the release of solvents.

Colin Craven

7/5/2007

Update or Other Action

CS staff reviewed and provided comments on two documents: the draft 2006 groundwater monitoring report and the draft 2007 sampling and analysis plan for groundwater monitoring.

Colin Craven

9/24/2007

Update or Other Action

Contaminated Sites provided approval to the IHS (via email) for not conducting the 2007 round of groundwater monitoring to refocus resources on better defining long-term goals for the environmental restoration projects.

Colin Craven

4/2/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed. The petroleum releases have been ranked. Two other source areas: a former laundraumat, and a hazardous waste dump exist at the site. If data becomes available to suggest contamination associated with these source areas exists above cleanup levels, then these source areas will be ranked separately. Additionaly, DDT was documented in surface soil below the MTG cleanup level on site, and above MTG in surface soil adjacent to this property. Further characterization of this contaminant is recommended.

Kim DeRuyter

5/12/2008

Meeting or Teleconference Held

Met with Stephanie Nicholia and Kathleen Peters to discuss proposed IHS building demolition and contamination associated with the old tank farm and USTs at the site. Kathleen showed me the site and discussed drums and debris that will also need cleaned up during the site remediation efforts. The Village Council is concerned about the solid waste management plan proposed for the building removal.

Kim DeRuyter

7/16/2008

Site Characterization Report Approved

The 2006 Final Groundwater Monitoring Report was received by the department on October 29, 2007. The report was posted to the wrong file, and was recently located. The report was reviewed for comparison to comments to the 2007 Sampling and Analysis Plan documented in a letter to Paul Geisert Dated July 5, 2007. The Final report incorporated most of DEC’s comments, with the following exceptions: Comment 6, requested a description of the condition of the monitoring wells. Comment 7, requested repair and resurvey of the monitoring wells. Comment 8, requested that PAH analysis be added to the sampling protocol of the monitoring well with the highest contaminant level. Monitoring at the site is ongoing, and will be re-evaluated in light of planned building demolition and future remedial action. Building demolition may further damage, or necessitate closure of monitoring wells at the site. Subsequent to building demolition, DEC recommends a comprehensive evaluation of the potential contaminants of concern (COCs) at the site, and submittal of a new sampling and analysis plan reflecting known and potential COCs. At that time, damaged or decommissioned wells should be repaired or replaced and surveyed so that groundwater gradients can be accurately measured, and PAH sampling conducted.

Kim DeRuyter

10/1/2009

Update or Other Action

Contaminated Sites staff received an update on the Indian Health Service (IHS) Tanana site. It was hoped that the 2009 groundwater monitoring event would capture potential changes in contaminant concentrations resulting from this summer’s flood, but numerous monitoring wells were frozen during the early August sampling event. The former hospital building, maintenance garage, and generator buildings were demolished this summer. IHS will be working on a remedial action plan for the site this winter.

Kim DeRuyter

1/28/2010

Update or Other Action

Staff participated in the monthly project leadership team meeting. Kathleen Zuray looked into the land transfer status for the property near the landfill that the City wanted to use for a soil remediation site. The property transfer will not be finalized until well after the summer field season, so it was determined that the landfarm and stockpile would be located on the 14 acres the Tribe has set aside for soil remediation. Staff emphasized the a landfarm design with a sampling and analysis plan would need to be reviewed and approved prior to constuction of the land farm. ANTHC conducted a hazardous materials survey as part of this summers demolition project. Samples of the generator building slab detected low concentrations of PCBs. Staff is working with the Solid waste program to determine if the slab can be placed in the Tanana Landfill, but a decision will have to wait until the new Solid Waste Regulations are finalized.

Kim DeRuyter

9/16/2010

Meeting or Teleconference Held

Staff participated in the monthly project leadership team call. Kathleen informed the group about the status of the slab removal. It has been containerized and is waiting for the September 20 barge. An EPA disposal number is pending. Discussion also led to the next steps toward Phase 2 of the project. The final date for deliverables in Phase 1 is October 20. IHS and TTC will work on a Work Plan for Phase 2 this fall/winter.

Meghan Dooley

8/26/2011

Site Characterization Workplan Approved

DEC received the draft Soil Sampling and Analysis Plan on August 17, 2011. Comments were sent on August 19, 2011. The final Soil Sampling and Analysis Plan was approved on August 26, 2011. The plan calls for using a grid sampling approach to characterize the Building 303 area for any potential PCB contamination in the soil. Additionally, the plan calls for completing soil borings at 4 different locations throughout the rest of the former hospital site to characterize petroleum contamination in the subsurface. Samples will be collected at 10, 20, and 30 feet below ground surface at buildings 301, 311, 312, and 314. Samples will be analyzed for some or all of the following: petroleum, benzene, toluene, ethylbenze, and xylene (BTEX), poly cyclic aromatic hydrocarbons (PAH), volatile organic carbon (VOC), and chlorinated solvents. Samples will also be collected at a nearby site to determine existing soil conditions. The Indian Health Service plans to create a landfarm in the future in order to remediate petroleum contaminated soil.

Meghan Dooley

12/28/2011

Document, Report, or Work plan Review - other

ADEC reviewed and sent comments on the draft Groundwater Monitoring Analytical Results. 5 wells were sampled for DRO, GRO, RRO, PAH and VOCs. It was discovered that 8 wells were either missing or damaged and the groundwater at 1 well was too deep to sample with the equipment present at the time. DRO was detected at MW-01, all other analytes were below cleanup levels.

Meghan Dooley

12/28/2011

Document, Report, or Work plan Review - other

ADEC reviewed and commented on the draft Soil Sampling Analytical Results for the Hospital site. Samples were collected at four locations and analyzed for petroleum hydrocarbons, VOCs, and PAH. The former vehicle maintenance building was sampled for arsenic and lead. The building 303 site was sampled for PCBs.

Meghan Dooley

5/8/2012

Document, Report, or Work plan Review - other

ADEC sent additional comments on the revised Soil Sampling Report and the revised Groundwater Monitoring Report.

Meghan Dooley

9/13/2012

Document, Report, or Work plan Review - other

ADEC approved of the 2011 Soil Sampling and Groundwater Monitoring Analytical Results reports.

Meghan Dooley

5/1/2013

Document, Report, or Work plan Review - other

ADEC sent comments on the draft Removal Action Report for the 2012 Field Season - Zone 4.

Meghan Dooley

6/20/2013

Site Visit

CS staff attended a meeting with the Indian Health Service, the Tribe, and the consultant conducting the remedial efforts at the hospital site. Endpoint goals were discussed and CS staff also toured the excavation site and the landfarm.

Meghan Dooley

1/23/2014

Update or Other Action

Received on July 22, 2013- Draft Removal Action Report for the 2012 Field Season-Zone 4, Former AANHS Hospital Site.

Meredith Savage

1/23/2014

Update or Other Action

Conference call held with IHS Michael Weaver regarding status of Tanana Hospital sites. Summary: -IHS will be sending in a draft report for Areas 1, 2, & 3; requests that ADEC comment on all areas, including earlier draft for Area 4. -IHS agreed to excavate to maximum depth of 15' bgs, or less if possible. -All potentially contaminated soils (PCS) have been hauled to the Remediation Treatment Area (RTA), however, the PCS may be moved back to the landfill site (at Alternative Clean-up levels); Tribe will maintain RTA. -Damaged groundwater monitoring wells will be replaced in 2014. -Vapor intrusion monitoring will occur in 2014. -IHS is hoping for a No Further Action with ICs designation in Fall of 2014. -Tribe wants this site transferred (to Tribe), ultimately.

Meredith Savage

5/2/2014

Document, Report, or Work plan Review - other

ADEC reviewed and commented on the draft 2012 Field Season Removal Action Report (recieved 7/22/2013) and the draft 2013 Field Season Removal Action Report (received 3/18/2014)for the Former AANHS Hospital site. There are four cleanup zones identified at the site- the 2012 removal action (RA)report dealt with Zone 4 and the 2013 RA report dealt with Zones 1, 2, and 3. IHS had requested in fall 2013 that the 2012 and 2013 reports be reviewed together. 2012: Zone 4 RA entailed the sampling and subsequent excavation of petroleum contaminated soil in two areas north of 2nd Ave. (Former Tank Farm Area and Former Maintenance Building), sampling of two soil piles on site, and construction of a remediation treatment area (RTA) off site (area approx. 3 acres). Contaminants of concern (COC) for all zones at the Hospital site include petroleum hydrocarbons (DRO, RRO, GRO), VOCs, PAHs, PCBs, and selected metals. The Tank Farm area was excavated to a depth of 15' below ground surface (bgs) and confirmation sample results at this depth were below alternative cleanup levels (ACLs). The Mantenance Bldg. area was also excavated to 15'bgs; confirmation sample results for petroleum concentrations were below ACLs, but above for TCE. No further excavation is planned. All excavated material was taken to the RTA. Additional sampling of soil piles was planned for 2013. 2013: Zones 1-3 are located south of 2nd Ave. Sampling and excavation of contaminated soils was conducted in multiple areas within these three zones. Soil was excavated to a maximum depth of 15' bgs. Soil above the ACLs remain at three confirmation sample locations in Zone 1 (former tank locations) and three confirmation sample locations in Zone 3 (former hospital building). No further excavation or remediation was recommended. Groundwater monitoring will continue on this site and soil vapor monitoring wells will be installed in 2014. The two on-site soil piles received additional sampling in 2013 and all samples were below ACLs. The RTA was expanded by a little over 1/2 acre.

Meredith Savage

6/4/2014

Meeting or Teleconference Held

A conference call was held between ADEC (Meredith Savage) and IHS (Michael Weaver)to discuss ADEC comments and IHS responses regarding the 2012 and 2013 remedial action reports. ADEC questioned the use of 100ppm as a screening level for the PID, the number of confirmation samples taken, and the fact that excavation was stopped at 15' bgs, regardless of presence of contamination. An agreement was not reached and a second conference call was scheduled.

Meredith Savage

6/11/2014

Meeting or Teleconference Held

A conference call was held between John Halverson and Meredith Savage (ADEC), Michael Weaver (IHS), and Paul Bianco (Ridolfi) to discuss ADEC issues with the 2012 and 2013 RA reports. ADEC requested that additional confirmation samples be taken from Zone 1. Agreement was reached regarding the relocation of several groundwater monitoring wells and the addition of other GW wells in 2014 so as to better assess the extent of the contaminant plume. Also agreed upon were the locations and number of vapor monitoring wells to be installed during the 2014 field season.

Meredith Savage

7/8/2014

Site Visit

Met onsite with Michael Weaver of IHS (WA area), Paula Poncho of IHS (AK area), Shannon Erhart (Tanana Tribal Council), and Paul Bianco of Ridolfi. Viewed excavation areas, groundwater monitoring wells, and vapor monitoring wells.

Meredith Savage

7/28/2014

Document, Report, or Work plan Review - other

Received memorandum titled 2014 Groundwater, Soil Vapor, Soil, and Water Treatment System Sampling at the Former IHS Hospital Site at Tanana, Alaska. The memorandum serves as an addendum to the 2011 Groundwater Sampling and Analysis Plan, the 2012 Vapor Intrusion Evaluation Plan, and the 2012 Soil Remediation Plan. The memorandum details the sampling to be conducted at 14 groundwater monitoring wells, 14 soil vapor monitoring points, and the Remediation Treatment Area (soil), and provides the analyses to be performed on each set of samples.

Meredith Savage

8/8/2014

Document, Report, or Work plan Review - other

ADEC approves memorandum titled 2014 Groundwater, Soil Vapor, Soil, and Water Treatment System Sampling at the Former HIS Hospital Site at Tanana, Alaska.

Meredith Savage

2/25/2015

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (ADEC) received a report titled Removal Action Report for the 2012 Field Season – Zone 4, Former AANHS Hospital Site – Native Village of Tanana on January 15, 2015. The report addresses construction of a remediation treatment area (RTA), excavation of petroleum contaminated soil from Zone 4 of the AANHS Hospital project site, transport of soil to the RTA, and soil sampling as laid out in the Soil Remediation Plan. (See above comments provided on 5/02/2014) ADEC has reviewed this report and accepts it as final with the understanding that the 2013 and 2014 reports will address the additional lateral excavation required for the maintenance building, additional sampling of the stockpiles, and excavation of DRO contaminated soil at the former generator building.

Meredith Savage

4/21/2015

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (ADEC) received a memorandum titled 2015 Sampling of Soil Vapor and Indoor Air at the Former IHS Hospital Site at Tanana, Alaska on April 21, 2015. The memo provides the soil vapor and indoor air sampling strategy for the 2015 field season within the Tanana Hospital project area. Because the proposed work to be done at this site has not changed from the ADEC approved 2012 Vapor Intrusion Evaluation Plan, ADEC agreed that a memorandum would suffice in lieu of a duplicate work plan. Fourteen soil vapor samples and 17 indoor air samples (plus requisite duplicates) will be collected and analyzed for gasoline range organics (GRO), diesel range organics (DRO), and volatile organic compounds (VOC).

Meredith Savage

8/12/2015

Update or Other Action

Transfer to Fairbanks

Susan Carberry

6/9/2016

Site Visit

DEC performed a site visit at all IHS Tanana sites and the Remediation Treatment Area. The site status for each area was discussed with IHS and Tanana representatives.

Monte Garroutte

1/9/2018

Document, Report, or Work plan Review - other

DEC Approved the Former Indian Health Services Hospital Site Remediation Treatment Area Soil Remediation Work Plan. The work plan provides detailed plans and procedures for future landfarm operations, maintenance, monitoring (OM&M), and closure at the remediation treatment area (RTA) in Tanana, Alaska.

Monte Garroutte

3/1/2019

Update or Other Action

On March 1, 2019 I reviewed a letter and Interim Report from Ahtna with ISM sample results form the RTA. Results indicate that the top 10-inches of soil (a tilled lift) in the northern half of the landfarm (Decision Unit [DU]-1) meets the SRTLs and cumulative risk does not exceed permissible levels. To allow for unrestricted use, SRTLs are the most stringent 18 AAC 75.341 Method Two, Tables B1 and B2 Soil Cleanup Levels (SCLs). On August 20, 2108, ADEC approved the transport of approximately 1,200 cubic yards (CY) of soil from the landfarm to the borrow pit staging area for reuse by the City of Tanana. The southern half of the landfarm (DU-2) did not meet the SRTLs and will need additional tilling and fertilizer application. On March first I contacted the RP (Tanana Tribal Council; Kathleen Peters-Zuray) introduced myself as the current PM and requested the Operations, Maintenance and Monitoring (OM&M)Report for 2017-2018 and updates on Plans for 2019 work. Ms. Peters-Zuray responded that she would have the contractor (Ahtna) send me the most recent report.

John O'Brien

3/28/2019

Update or Other Action

The 2018 Draft Operations, Maintenance, and Monitoring Report for the RTA was received on March 27,2019. Review comments were provided by ADEC on March 28, 2019.

John O'Brien

6/18/2019

Update or Other Action

Final Remediation Summary Report Approved.

John O'Brien

8/28/2019

Document, Report, or Work plan Review - other

DEC approved the Final Work Plan, Building 302 Contaminated Soil Removal, Former Indian Health Services Hospital Site, Tanana, Alaska, dated August 2019.This document details upcoming work at Building 302 of the former Indian Health Services Hospital in Tanana, Alaska. Work planned includes excavation, X-ray fluorescence analyzer field screening, and confirmation sampling of lead-contaminated soil at Building 302. Lead-contaminated soil above cleanup levels will be placed in supersacks and barged to an appropriate disposal facility. Additionally, work may include removal of up to 10 cubic yards of petroleum-contaminated soil (if contamination is encountered) from the pulling of an unregulated underground storage tank, to be placed in the Tanana soil remediation treatment area.

Kevin Fraley

6/8/2020

Document, Report, or Work plan Review - other

DEC approved the Final 2019 LTM Report. Field activities took place in July and September 2019. This included groundwater and pore water sampling efforts, as well as soil gas sampling via vapor wells at the remaining structures near the groundwater plumes. Monitoring wells inside of the plume boundaries showed exceedances for several COCs. Monitoring wells located outside of plume boundaries were below groundwater cleanup levels for all COCs. Pore water samples all fell below surface water cleanup levels as well. Vapor well sampling showed no COCs greater than target levels in soils next to building foundations. Recommended continued biannual groundwater sampling to allow for MK trend analysis, as well as decommissioning of the monitoring wells outside of the groundwater plumes. Site-wide cumulative risk evaluation to be done after field season efforts in 2020.

Tim Sharp

7/7/2020

Document, Report, or Work plan Review - other

DEC approved the Final 2019 RTA Op, Maintenance and Monitoring Report. The report discusses sampling of leachate treatment system effluent and surface soil sampling. Chloroform was detected above Table C and MTG cleanup levels, and is possibly attributed to the secondary GAC filter tank being treated with chlorinated detergents prior to installation. The report recommends further sampling of the filter and tank, followed by replacement of the contaminated portions of the system. The report also recommends regular tilling of the nearby land farm throughout the 2020 field season.

Tim Sharp

9/18/2020

Update or Other Action

DEC approved a FCF to allow for further transport of contaminated soil to the RTA - from the previously approved 10 cy to 40 cy. Confirmation sampling will be done according to the work plan and guidance documents

Tim Sharp

1/28/2021

Update or Other Action

DEC received the draft B302 Contaminated Soil Removal Report

Tim Sharp

2/5/2021

Document, Report, or Work plan Review - other

DEC sent comments to IHS for the Draft B302 Contaminated Soil Removal Report. The report details removal and disposal of lead contaminated soil found around the B302 footprint. The report also discusses removal of a 500-gallon UST and removal of fuel-impacted soil to the RTA. Confirmation samples collected from sidewalls and floors of excavation showed all COCs fell below MTG CULs. The Report recommends NFA is necessary at B302 location.

Tim Sharp

2/18/2021

Document, Report, or Work plan Review - other

DEC approved the final B302 Soil Removal Report, which was largely similar to the draft report

Tim Sharp

4/20/2021

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 71096 Indian Health Service-Petroleum Sources.

Tim Sharp

5/3/2021

Document, Report, or Work plan Review - other

DEC sent comments on the 2020 LTM Draft Report. Groundwater samples were collected in July and November 2020. Multiple COCs were detected above cleanup levels, and bias was detected as cross contamination between samples was a factor in the data. The report also recommended evaluation for a cleanup complete with ICs determination to facilitate land transfer. Due to uncertain contaminant trends and the levels of contamination in groundwater, a CC w/ ICs determination is not recommended by DEC.

Tim Sharp

6/1/2021

Document, Report, or Work plan Review - other

DEC approved the Final 2020 LTM Report. Eleven COCs were detected above Table C from wells inside the two groundwater plumes. Several results, most notably RRO, were flagged as estimated with a high bias due to cross-contamination. The report recommended further sampling, scheduled for every three years until COC concentrations drop below Table C for at least two consecutive sampling events.

Tim Sharp

6/15/2021

Document, Report, or Work plan Review - other

DEC Approved the 2021 Addendum to the 2018 RTA Work Plan. This document proposes sampling soil for chloroform and calculating a Method Three ACL. IHS will also separate the RTA into four decision units rather than 2 and sample 50 increments instead of 30 for ISM. They aim to use these data to determine the best additive to use to expedite RTA soil remediation.

Tim Sharp

8/2/2021

Meeting or Teleconference Held

DEC CS and PPR held a meeting with TTC, Arctic Data Services, and Ahtna to discuss the used oil releases discovered during Arctic Data Services' site visit. Releases are to the north and west of Building 321 and consist of buckets, a half drum on a pallet, and IBC tanks (though no current IBC tanks show evidence of ongoing leakage, heavy staining was present in this location). Arctic Data Services will prepare a work plan for characterization and sampling of other waste in the area (transformers, other potential hazardous materials). As the field season is over the hill at this point, DEC will prioritize evaluating a work plan as expediently as possible. Initial work will go through PPR, and if PPR deems necessary the release will be added to this site as a new source area.

Tim Sharp

4/15/2022

Document, Report, or Work plan Review - other

DEC sent comments on the Draft RTA OM&M Report. Sample results from the leachate treatment system were below Table C. ISM sampling from all three decision units within the RTA were below the most stringent cleanup levels. Additionally, sample results from the contaminated granular activated carbon (GAC) filter were below the toxic characteristic leaching procedure (TCLP) limit, and soil samples for chloroform from this area were below the calculated site-specific alternative cleanup level. The report recommends removing ten inches of treated soil to be used in landfill expansion, as well as continued tilling of the landfarm.

Tim Sharp

5/18/2022

Document, Report, or Work plan Review - other

DEC approved the Final 2021 RTA Operations, Maintenance, and Monitoring (OM&M) Report. IHS will gain approval from the Solid Waste Program and the City of Tanana before placing remediated soil in the former gravel pit between the landfarm and landfill, per the RTA Soil Remediation Work Plan.

Tim Sharp

12/27/2022

Update or Other Action

The 117th Congress passed Public Law 117-266 on December 27, 2022. The law specifies "As soon as practicable, but not later than 180 days, after the date of the enactment of this Act, the Secretary shall convey to the Council all right, title, and interest of the United States in and to the property described in paragraph (2) for use in connection with health and social services programs."

Jamie McKellar

2/27/2023

Update or Other Action

CLARIFICATION REGARDING CLEANUP LEVELS: On May 26, 2000, DEC issued a letter approving alternative cleanup levels (ACLs) for GRO, DRO, Arsenic, Benzene, Toluene, Ethylbenzene, Xylenes, Naphthalene, Bis(2-ethylhexyl)phthalate, n-Butylbenzene, Cadmium, Chloroform, Chloromethane, and Mercury. Since the ACLs were issued in 2000, there have been multiple regulations updates. Some of the approved ACLs are more stringent than the current 18 AAC 75 Table B1 cleanup levels and others exceed the current 18 AAC 75 Table B1 maximum allowable concentrations.

Jamie McKellar

3/28/2023

Meeting or Teleconference Held

Representatives from DEC, Arctic Data Services, Ahtna, Indian Health Services, and the Tanana Tribal Council met to discuss the upcoming federally-mandated land transfer.

Jamie McKellar

4/27/2023

Document, Report, or Work plan Review - other

REPORT APPROVAL: 2022 Remediation Treatment Area Operations, Maintenance, and Monitoring Report Former Indian Health Service Hospital Site, Tanana, AK (Ahtna Engineering Services, LLC, March 2023)

Jamie McKellar

6/20/2023

Institutional Control Update

On June 20, 2023, DEC's Commissioner signed an Environmental Covenant for Lot 12, U.S. Survey 5958, T4N, R22W, Fairbanks Meridian, Alaska. This Covenant subjects the Property to certain activity and use limitations for the property including restrictions on groundwater use and excavations, and notification requirements for construction activities. A copy of the final, signed covenant is attached to the database.

Jamie McKellar

8/16/2023

Document, Report, or Work plan Review - other

WORK PLAN APPROVED: DEC Approval of 2023 Long-Term Monitoring Work Plan Former Indian Health Service Hospital Site, Tanana, Alaska. Dated July 2023.

Jamie McKellar

9/15/2023

Document, Report, or Work plan Review - other

WORK PLAN APPROVED: DEC Approved the 2023–2025 Landfarm Operations, Maintenance, and Monitoring, Remediation Treatment Area Work Plan (Arctic Data Services, August 2023).

Jamie McKellar

12/8/2023

Institutional Control Record Established

Institutional Controls established and entered into the database.

Sophia Bracio

Contaminant Information

Name	Level Description	Media	Comments
1,2,4-Trimethylbenzene	> Table C	Groundwater
1,3,5-Trimethylbenzene	> Table C	Groundwater
1-Methylnaphthalene	> Table C	Groundwater
2-Methylnaphthalene	> Table C	Groundwater
Benzene	> Table C	Groundwater
Chloromethane	< Method 2 Most Stringent	Soil
DRO	Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation	Soil
DRO	> Table C	Groundwater
Ethylbenzene	> Table C	Groundwater
GRO	> Table C	Groundwater
Ethylbenzene	Other	Soil	Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Method 2 Migration to Groundwater < ACL < Health/Ingestion/Inhalation
GRO	Other	Soil	Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Method 2 Migration to Groundwater < ACL = Health/Ingestion/Inhalation
Isopropylbenzene	< Method 2 Most Stringent	Soil
n-Butylbenzene	< Method 2 Most Stringent	Soil
n-Propylbenzene	< Method 2 Most Stringent	Soil
Naphthalene	Other	Soil	Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Migration to Groundwater < Health/Ingestion/Inhalation < ACL
Naphthalene	> Table C	Groundwater
RRO	> Table C	Groundwater
RRO	< Method 2 Most Stringent	Soil
sec-Butylbenzene	< Method 2 Most Stringent	Soil
Toluene	< Method 2 Most Stringent	Soil
Xylenes (total)	> Table C	Groundwater
Xylenes (total)	Other	Soil	Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Migration to Groundwater < Health/Ingestion/Inhalation < ACL
Trichloroethene	Other	Soil	Limit of detection (LOD) exceeded soil cleanup levels
Benzene	Other	Soil	Maximum remaining soil concentration is above the Alternate Cleanup Level (ACL).

Name

Level Description

Media

Comments

1,2,4-Trimethylbenzene

> Table C

Groundwater

1,3,5-Trimethylbenzene

> Table C

Groundwater

1-Methylnaphthalene

> Table C

Groundwater

2-Methylnaphthalene

> Table C

Groundwater

Benzene

> Table C

Groundwater

Chloromethane

< Method 2 Most Stringent

Soil

DRO

Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation

Soil

DRO

> Table C

Groundwater

Ethylbenzene

> Table C

Groundwater

GRO

> Table C

Groundwater

Ethylbenzene

Other

Soil

Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Method 2 Migration to Groundwater < ACL < Health/Ingestion/Inhalation

GRO

Other

Soil

Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Method 2 Migration to Groundwater < ACL = Health/Ingestion/Inhalation

Isopropylbenzene

< Method 2 Most Stringent

Soil

n-Butylbenzene

< Method 2 Most Stringent

Soil

n-Propylbenzene

< Method 2 Most Stringent

Soil

Naphthalene

Other

Soil

Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Migration to Groundwater < Health/Ingestion/Inhalation < ACL

Naphthalene

> Table C

Groundwater

RRO

> Table C

Groundwater

RRO

< Method 2 Most Stringent

Soil

sec-Butylbenzene

< Method 2 Most Stringent

Soil

Toluene

< Method 2 Most Stringent

Soil

Xylenes (total)

> Table C

Groundwater

Xylenes (total)

Other

Soil

Maximum remaining soil concentration is below Alternate Cleanup Level (ACL). Migration to Groundwater < Health/Ingestion/Inhalation < ACL

Trichloroethene

Other

Soil

Limit of detection (LOD) exceeded soil cleanup levels

Benzene

Other

Soil

Maximum remaining soil concentration is above the Alternate Cleanup Level (ACL).

Control Type

Type	Details
Environmental Covenant	On June 20, 2023, DEC's Commissioner signed an Environmental Covenant for Lot 12, U.S. Survey 5958, T4N, R22W, Fairbanks Meridian, Alaska. This Covenant subjects the Property to certain activity and use limitations including restrictions on groundwater use and excavations, and notification requirements for construction activities. A copy of the final, signed covenant is attached to the database.

Type

Details

Environmental Covenant

On June 20, 2023, DEC's Commissioner signed an Environmental Covenant for Lot 12, U.S. Survey 5958, T4N, R22W, Fairbanks Meridian, Alaska. This Covenant subjects the Property to certain activity and use limitations including restrictions on groundwater use and excavations, and notification requirements for construction activities. A copy of the final, signed covenant is attached to the database.

Requirements

Description	Details
Groundwater Use Restrictions	No groundwater wells shall be installed on the contaminated area of the Property without prior DEC approval.
Groundwater Use Restrictions	Contaminated groundwater underlying the Property may not be pumped, drained, or dewatered; or used for irrigation, dust control, or any other purpose without prior DEC approval. If that use is approved under this Covenant, that use is still subject to all applicable treatment, monitoring, disposal, and permitting requirements.
New Construction Restrictions	Any construction, modification, or use of buildings on the contaminated area of the Property is prohibited without prior review and approval by DEC.
New Construction Restrictions	If the use of a building on the Site changes, or if buildings are constructed within 30 feet of the Site, DEC must be notified and may require that Grantor complete an evaluation of vapor intrusion and mitigation of any vapor intrusion risks.
Excavation / Soil Movement Restrictions	Excavation, drilling, and other intrusive activities below a depth of 5 feet are prohibited within the Site, without prior review and approval from DEC.
When Contaminated Soil is Accessible, Remediation Should Occur	In the event that contaminated soil on the Property becomes accessible in the future, the Grantor shall notify DEC, characterize the contamination, and, if determined necessary by DEC, cleanup the soil pursuant to DEC's Site Cleanup Rules.
Subdivision Restriction	DEC must be notified in advance of any subdivision or replat of the Property. This Covenant must be included as part of future Property transactions and attached to subsequent associated parcels, as determined applicable by DEC.
Advance approval required to transport soil or groundwater off-site.	DEC approval is required prior to moving soil or groundwater where contamination remains above applicable default cleanup levels (Table C or Method Two under current regulations). If DEC approval for movement is granted, any moved soil or groundwater must still be characterized and managed following regulations applicable at that time.
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)	Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 Water Quality Standards is prohibited.
Groundwater Use Restrictions	Groundwater throughout Alaska is protected for use as a water supply for drinking, culinary and food processing, agriculture including irrigation and stock watering, aquaculture, and industrial use. Contaminated site cleanup complete determinations are based on groundwater being considered a potential drinking water source. In the event that groundwater from this Site is to be used for other purposes in the future, such as aquaculture, additional characterization and treatment may be required to ensure the water is suitable for its intended use.

Description

Details

Groundwater Use Restrictions

No groundwater wells shall be installed on the contaminated area of the Property without prior DEC approval.

Groundwater Use Restrictions

Contaminated groundwater underlying the Property may not be pumped, drained, or dewatered; or used for irrigation, dust control, or any other purpose without prior DEC approval. If that use is approved under this Covenant, that use is still subject to all applicable treatment, monitoring, disposal, and permitting requirements.

New Construction Restrictions

Any construction, modification, or use of buildings on the contaminated area of the Property is prohibited without prior review and approval by DEC.

New Construction Restrictions

If the use of a building on the Site changes, or if buildings are constructed within 30 feet of the Site, DEC must be notified and may require that Grantor complete an evaluation of vapor intrusion and mitigation of any vapor intrusion risks.

Excavation / Soil Movement Restrictions

Excavation, drilling, and other intrusive activities below a depth of 5 feet are prohibited within the Site, without prior review and approval from DEC.

When Contaminated Soil is Accessible, Remediation Should Occur

In the event that contaminated soil on the Property becomes accessible in the future, the Grantor shall notify DEC, characterize the contamination, and, if determined necessary by DEC, cleanup the soil pursuant to DEC's Site Cleanup Rules.

Subdivision Restriction

DEC must be notified in advance of any subdivision or replat of the Property. This Covenant must be included as part of future Property transactions and attached to subsequent associated parcels, as determined applicable by DEC.

Advance approval required to transport soil or groundwater off-site.

DEC approval is required prior to moving soil or groundwater where contamination remains above applicable default cleanup levels (Table C or Method Two under current regulations). If DEC approval for movement is granted, any moved soil or groundwater must still be characterized and managed following regulations applicable at that time.

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)

Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 Water Quality Standards is prohibited.

Groundwater Use Restrictions

Groundwater throughout Alaska is protected for use as a water supply for drinking, culinary and food processing, agriculture including irrigation and stock watering, aquaculture, and industrial use. Contaminated site cleanup complete determinations are based on groundwater being considered a potential drinking water source. In the event that groundwater from this Site is to be used for other purposes in the future, such as aquaculture, additional characterization and treatment may be required to ensure the water is suitable for its intended use.

Environmental Covenant for IHS Land Transfer to Tanana Tribal Council

Hazard ID	Site Name	File Number
24328	IHS Tanana - Bldg. 303	780.26.004

Hazard ID

Site Name

File Number

24328

IHS Tanana - Bldg. 303

780.26.004

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Site Report: IHS Tanana Health Center

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Environmental Covenant for IHS Land Transfer to Tanana Tribal Council

Missing Location Data

State of Alaska Department of Environmental Conservation