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Site Report: FAA Cordova Shop Site Bldg. 304

Site Name: FAA Cordova Shop Site Bldg. 304
Address: Cordova Airport, Mile 13 Copper River Hwy., Cordova, AK 99574
File Number: 2215.38.001
Hazard ID: 1023
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 60.497239
Longitude: -145.463526
Horizontal Datum:NAD27

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Problems/Comments

The Shop Site is located north of the Copper River Highway along the road that passes through the quarters facility. There are a waste storage area, cistern, pumphouse, concrete pad, transformer, and a waste drum storage area at this site. Waste oil was stored in four or five 55-gallon drums near the southeast corner of the shop building for approximately 10 years. A pumphouse (Building 607) south of the shop contains a groundwater well and pump equipment. This well is approximately 30 feet deep. It serves facilities on the north side of the Copper River Highway. Six sumps were also believed to be situated west of Building 304. Sumps 1 and 2, constructed of buried, perforated, 55-gallon drums, were removed in 1995. Four additional sumps were suspected to be present. Upon excavation, a buried drum was found at Sump 3; no drums or dry wells were encountered at the remaining three locations. The sumps were abandoned by installing a plumber’s plug at either end and filling it with non-shrink grout at the sump end. Approximately 75 cubic yards of contaminated soil was excavated from the sump areas and thermally remediated in 1997. In 1994, three ASTs were addressed at the Shop Building #304. AST 35-E-1 was a 500-gallon, welded-steel tank north of the shop on a wooden frame used to store heating oil. Petroleum stains were evident on the ground surface at the former tank location. The probable sources of the staining include overfills and spills during fuel delivery. Approximately 1/8 cubic yards of potentially contaminated soil was excavated. A 1,000-gallon, welded-steel AST was formerly located west of the shop on a wooden frame. The tank was removed in 1994. On October 14, 1994, evidence was noted of a fuel release northwest of the shop which was associated with the 1,000-gallon AST. However, results of the field-screening and laboratory sample analyses at the former location of the 1,000-gallon AST did not indicate a fuel release. A 500-gallon AST temporarily stored northwest of the shop was removed before 1994. Field-screening sample results at the former AST location did not indicate a fuel release. In 1996, residual contamination at Drum Storage Area was DRO and RRO from composite samples of the floor and wall at 1,300 mg/kg and 2,400 mg/kg respectively. The remaining residual contamination is at least 5 feet above the estimated groundwater level. Residual contamination at Sumps 7 and 8 had DRO measured from the floor of the pit at 1,600 mg/kg (7’ bgs). Pipe extending southward from Sumps 7 and 8 is PVC of unknown length and destination. The depth of the pipe is approximately 5’ bgs. Additional investigation is recommended to determine the final discharge point and potential for downstream contamination. It is suspected that the pipe leads to a leach field. In 1996, based on confirmational sampling results, the sump areas to the west of Building 304 and the area north of the concrete pad have been restored to below action levels and do not require further action. Metals concentration results were consistently near background levels and do not warrant action. In July 1997, additional soil was excavated and confirmatory soil and groundwater samples were collected from the two areas: The Drum Storage Area and the former location of Sumps 7 and 8. Confirmation soil samples collected from both areas showed either non-detect or low levels of DRO. The highest level of DRO was 24 mg/kg

Action Information

Action Date Action Description DEC Staff
4/22/1994 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Plan to incorporate contaminated soil into road bed approved. Eileen Olson
5/4/1994 Update or Other Action (Old R:Base Action Code = CORR - Correspondence (General)). Sampling plan for soil disposal approved. Eileen Olson
4/24/1995 Update or Other Action Decommissioning Assessment Report, ASTs, submitted. The report documents decommissioning of 5 ASTs at FAA Cordova. Eileen Olson
11/29/1995 Update or Other Action Release Investigation Final Report, Merle K "Mudhole" Smith Airport Facilities, Cordova, Alaska submitted. Eileen Olson
8/15/1997 Update or Other Action Limited Release Investigation EVOS Station Report submitted. Eileen Olson
4/6/1998 Update or Other Action Site Cleanup and Investigation Report, Site Cleanup and Investigation Report Addendum, and Corrective Action and Remediation Report submitted. Eileen Olson
11/29/2001 Update or Other Action Site Visit to FAA Cordova facility with Brad Platt of FAA and Mike Siegrist of Bristol Environmental. Elizabeth Stergiou
12/21/2001 Update or Other Action Completed FAA Cordova file review in response to No Further Actions requests for sites located at FAA's Cordova facility. File review and subsequent letter covered issues at all known contaminated sites at FAA Cordova Station. Elizabeth Stergiou
1/14/2002 Update or Other Action Corrected site status from inactive to active. Elizabeth Stergiou
9/4/2003 Update or Other Action ADEC approved the workplan for the Fall 2003 Sampling and Analysis Plan for various sites. Deborah Williams
2/20/2004 Site Added to Database DRO and RRO contamination that has been removed in the soil. The extent of groundwater contamination may or may not be complete. Need to verify if drinking water well at Building 607 has been sampled and analyzed for all the contaminants of concern. Deborah Williams
2/20/2004 Site Ranked Using the AHRM Preliminary ranking. Deborah Williams
2/20/2004 GIS Position Updated Latitude and longitude interpolated from site maps and TopoZone.com, NAD27. Deborah Williams
8/25/2004 Update or Other Action Complete file review and additional information provided by FAA regarding nearby well at Building 607 demonstrates this site deserves closure. Mike Jaynes
3/2/2007 Exposure Tracking Model Ranking Initial ranking. Lisa Maserjian
10/26/2007 Conditional Closure Approved ADEC has determined that the investigation and cleanup actions employed at the FAA Cordova Station, Shop Building 304 and Floor Drain area, were effective in removing the drain and sludge contents and determining that the sludge had not impacted the surrounding environment. ADEC has also determined that the removal of contaminated soil in the Drum Storage area has been successful. Because the records for the decommissioning of Sumps 1 and 2 cannot be accounted for, a conditional closure has been established at this site. Once the leak detection system that impairs access to this iste is removed, additional investigation in this area will be required to determine whether any contamination remains and the results evaluated for potential impact to human health, safety and welfare or the environment. Until the investigation and evaluation can be completed, this requirement and the potential for remaining soil contamination will be documented in the Contaminated Sites database and records. Daniel Fremgen
10/26/2007 Institutional Control Record Established Once the leak detection system that impairs access to this site is removed, additional investigation in this area will be required to determine whether any contamination remains and the results evaluated for potential impact to human health, safety and welfare or the environment. Daniel Fremgen
4/26/2016 Update or Other Action Site reassigned for follow up by project manager Fred Vreeman
12/20/2018 Institutional Control Compliance Review IC compliance review conducted and the IC requirements information updated with complete details. Schedule reminder system to review site conditions again in one year's time. Evonne Reese
8/17/2020 Institutional Control Compliance Review Annual IC reminder system to review site conditions conducted on this date and IC letter sent to the landowner. Once contaminated soil is accessible, remediation should occur. Contact details updated in Affiliate section. Cascade Galasso-Irish
9/23/2020 Institutional Control Update I received a confirmation email from FAA staff stating that there has been no change in the land use on this property. Evonne Reese

Contaminant Information

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

Control Type

Type Details
Other This was added during a 2018 IC compliance review. ICs were placed on this site since records for the decommissioning of Sumps 1 and 2 cannot be accounted for. Additional investigation of the soil may be required in the future.

Requirements

Description Details
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)
When Contaminated Soil is Accessible, Remediation Should Occur
Excavation / Soil Movement Restrictions
Advance approval required to transport soil or groundwater off-site.

No associated sites were found.

Missing Location Data

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