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Site Report: ADOT&PF Aniak City Shop Bldg

Site Name: ADOT&PF Aniak City Shop Bldg
Address: River Road, Aniak, AK 99557
File Number: 2404.38.004
Hazard ID: 2606
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229
Latitude: 61.572983
Longitude: -159.534008
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.


City of Aniak leases a 1.3 acre parcel from ADOT&PF which is used as a garage/maintenance station. Over the past 17 years, various pieces of "junk", inoperable vehicles, barrels and pallets, etc., have been stored here. Stained soil was noted on 5/23/96 site visit and suspected to be petroleum. Possible solvent releases through the shop floor drains. Aniak wants to break lease for 1/2 of the leased parcel due to financial constraints. ADOT&PF will not take the land back until it is clean and able to be leased to another party. Land swapping is unacceptable to ADOT&PF at this site.

Action Information

Action Date Action Description DEC Staff
10/5/1995 Update or Other Action On this date, ADOT&PF during a site inspection of Lot 3D, Block 20, Aniak Airport, observed: barrels; derelict vehicles; junk material; trash; and sign of oil spillage throughout the property. ADOT&PF directed the City to remove all derelict and inoperable vehicles and equipment, junk material and salvage items within 30 days. The barrels were to be put on pallets within a containment area and banded together. A Phase II Environmental Assessment was to be performed to determine the extent of contamination. Donald Seagren
11/7/1995 Update or Other Action ADOT&PF responds to City letter on status of site cleanup. DOT approved waiting until spring to conduct environmental assessment. However, the City was to take all steps possible to otherwise cleanup the property, remove the junk and place the barrels on pallets, band them together and place them in a lined containment area. . Donald Seagren
8/7/2001 Update or Other Action Site visit and provide container management trainning to city and city shop employees. During the August site visit several 55 gallon drums were observed on pallets in a lined, bermed cell. Sheened water was within the berm. Several areas of soil around the yard were stained with what is thought to be petroleum. A large tank from a mobile fueling truck lay on the ground with a dark, large stain. Toats of batteries, individual batteries, and an old commercial freezer 1/3 full of batteries were observed. A toat, just off the open yard space in the woods contained some kind of product with leaking containers. Near it, an engine from a CAT drained on the ground. The site building has a floor drain with leachfield. Reportedly anything/everything went down the drain. Drinking water well is within 10 feet of the building. Used oil could be burned on-site as the shop has a used oil burner, however it will not fire. David Pikul
9/25/2001 Update or Other Action ADEC assisted with the used oil burner problem and the burner is up and running. Drums will be used on-site as fuel. Batteries have begun to be removed via barge service. David Pikul
9/18/2002 Update or Other Action DEC requested funding approval for the follwing tasks to be completed at the City Shop and Area-wide Aniak Airport. 1.Investigate the effects that management and handling of petroleum, batteries, and other materials at the site has had on surface soil, subsurface soil and groundwater. 2.Investigate the floor drain system within the site building to evaluate effects it has had on subsurface soil and groundwater. 3.Sample on-site drinking water well. 4.Sample area ADOT&PF monitoring wells. 5.Report findings and recommend cleanup options as appropriate. David Pikul
1/9/2003 Update or Other Action notification to the contractor that the existing RFP for the Aniak sites has been cancelled due to funding issues. David Pikul
3/21/2003 Update or Other Action RFP for airport-wide groundwater sampling and investigation of the City Shop re-issued. David Pikul
4/17/2003 Update or Other Action Funding approval requested for site work. David Pikul
4/29/2003 Update or Other Action The NTP for the Aniak Airport ADOT & PF Facility completed. David Pikul
6/16/2003 Update or Other Action Field work to begin. David Pikul
12/2/2003 Site Characterization Report Approved Site characterization work conducted 16 & 17 June 03.The City Shop has several areas of past and present potential contaminant sources. The potential active sources included leaking drums, batteries, and ASTs. Numerous surface stains were observed across the site. Impacted surface soil contained concentrations of DRO (388 ppm to 7,410 ppm) & RRO (11,200 ppm - 23,500 ppm) in excess of applicable cleanup standards. Arsenic concentrations exceeded ADEC cleanup standards. Previous studies have determined the arsenic background levels in Aniak vary from 5.8 ppm to 17 ppm. The values detected are consistent with the area background levels. One sample has a Chromium level of 28.7 ppm, which exceeds ADEC cleanup criteria. This sample is consistent with chromium levels detected in the area in 1999. The horizontal and vertical extent of soil contamination has not been delineated. The DW samples did not contain detectable concentrations of GRO, DRO or BTEX. The samples did contain a maximum of 0.00838 ppm carbon disulfide, which is less than the ADEC cleanup level of3.65 ppm. Carbon disulfide is a naturally occurring product of anaerobic biodegradation. 19 MWs were investigated at other ADOT&PF Aniak Airport sites. The wells appear to be in satisfactory condition and should allow for continued GW monitoring efforts. Due to well frost jacking, the wells should be re-surveyed. Donald Seagren
12/8/2003 Update or Other Action NTP signed for the following site work: The contractor will continue to monitor the groundwater from approximately 30 monitoring wells to determine current quality conditions. In addition, the soil and groundwater at the City's Shop site will be characterized. The contractor will prepare a work plan to continue the groundwater monitoring plan at the Aniak Airport and characterize the nature and extent of contamination at the Aniak City Shop site. The contractor will submit a report on the current groundwater quality results and a separate report that characterizes the soil and groundwater contamination at the Aniak City Shop. David Pikul
2/24/2004 Site Characterization Workplan Approved Site charaterization work plan approved David Pikul
6/15/2004 Site Characterization Report Approved Additional site characterization, consisting of soil sampling, GW sampling and drum characterization to facilitate the burning of the contents for energy recovery, conducted on 13-19 May 94. Soil samples had DRO contamination ranging from 306 ppm to 8650 ppm. The impacted soil did not appear to extend deeper than 5' - 7.5' bgs. Arsenic (8.66 - 13.6 ppm) was also observed but was determined to be normal background levels in the Aniak area. The GW samples did not contain any constituents exceeding cleanup levels. DRO, GRO and 10 VOCs were detected but at levels below applicable cleanup levels. A total of 43 drums were inventoried and found to contain antifreeze, used oil, oily water, tar, grease, and/or water. Some drums were able to be burned for energy recovery. Some were classified as hazardous waste. Donald Seagren
10/19/2005 Update or Other Action Groundwater sampling (both MWs and DW wells) and drum consolidation and management activities conducted. The groundwater samples from both the monitor wells and drinking water well did not contain detectable concentrations of VOCs or SVOCs. A total of 43 drums ere consolidated into 24 drums. These 24 drums, 8 totes of batteries and two drums of sulfuric acid were transported to Anchorage for disposal. Five 55-gallon drums containing soil and one tote containing a crushed 55-gallon drum, five 5-gallon plastic containers, one 5-gallon metal container and oily water was observed NW of the Aniak City Shop building. These need to be characterized and properly disposed of. Donald Seagren
5/11/2006 Update or Other Action Notification of Regulated Hazardous Waste Activity given to EPA and EPA ID number obtained. David Pikul
2/9/2007 Exposure Tracking Model Ranking David Pikul
2/27/2007 Conditional Closure Approved Based on an evaluation of risk to human health and the environment, a conditional closure was issued to the landowner, ADOT&PF. Soil contamination remains on site but does not affect the groundwater. Inhalation and ingestion pathways incomplete. Only the migration to GW pathway complete. Current GW monitoring does not indicate the GW has been affected by this release. No soil or groundwater will be transferred off site without prior ADEC approval. Groundwater monitoring will occur in accordance with a ADEC monitoring plan. Site closure without conditions will be considered when sampling confirms that soil and groundwater meet the 18 AAC 75 cleanup levels established for the site. David Pikul
2/27/2007 Institutional Control Record Established Administrative update (10/25/07) Evonne Reese
6/3/2013 Update or Other Action On this date ADEC received the “WORK PLAN ADDENDUM TO CONDUCT ADDITIONAL ENVIRONMENTAL SERVICES AT ADOT&PF ANIAK AREA-WIDE SITES, ANIAK, ALASKA” submitted by S&W dated May 31, 2013. The ADOT&PF will provide equipment, including a grader, dump truck, and front end loader, to conduct the soil land spreading at the Airport. B.C. Excavating LLC (BCX), under subcontract to Shannon & Wilson will provide the personnel to operate the equipment. Sixteen soil samples will be collected after landpreading activities. Discovery drilling will decommission a total of 11 monitoring wells at the DOT Aniak City Shop, the DOT former AST area, the DOT Aniak runway apron, and at the former MarkAir Facility. Work is planned for middle of June. The project will be completed by June 30, 2013. Grant Lidren
7/1/2013 Update or Other Action On this date, ADEC received the Additional Environmental Services at ADOT&PF Aniak Area-Wide Sites submitted by S&W, dated June 28, 2013. At the ADOT&PF Aniak City Shop Bldg, monitoring wells CS-MW-2, CS-MW-4, and CS-MW-6 were decommissioned. However, CS-MW-1 and CS-MW-7 could not be located. Grant Lidren
10/10/2014 Institutional Control Update Current project manager would like to retain management of this site. Evonne Reese
11/24/2015 Institutional Control Compliance Review IC compliance review conducted and staff name changed from Lidren to IC Unit. The groundwater monitoring wells have been decommissioned therefore the IC requirement of groundwater monitoring will be removed from the record. Verified that the affiliate information is up to date. Scheduled to send an IC reminder letter to the responsible party and landowner. Evonne Reese
12/1/2015 Institutional Control Update An IC Reminder letter was sent to the responsible party on this date. Nathan Maxwell
6/15/2018 Institutional Control Compliance Review IC compliance review conducted. Closure/IC Details updated. A groundwater use restriction was added as an institutional control for this site. Review frequency was reduced to every three years due to the groundwater use restriction. Scheduled to send an IC reminder letter. Reminder system set to follow-up in 2021. Kristin Thompson
9/28/2018 Institutional Control Compliance Review IC reminder letter sent on this day. Evonne Reese

Contaminant Information

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

Control Type

Type Details
Other CS database notation and letter to landowner/RP (added during a QC check 4/11/2014).


Description Details
Advance approval required to transport soil or groundwater off-site. Standard condition.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) Standard condition.
Groundwater Use Restrictions Groundwater wells may not be installed at this site without the prior approval of ADEC.
Periodic Review ADEC will conduct a review of site conditions every three years.

Missing Location Data

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