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Site Report: PenAir, King Salmon Airport

Site Name: PenAir, King Salmon Airport
Address: KING SALMON AIRPORT, P.O.B.36, King Salmon, AK 99613
File Number: 2569.26.005
Hazard ID: 23300
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 58.683762
Longitude: -156.669370
Horizontal Datum:NAD83

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

Temporary closure of two 25,000 gallon tanks in 12/98; one avgas and one jet A fuel. In October 1999, the two USTs were removed. No groundwater was encountered during excavation activities. All excavated soil was placed back into the excavation. Subsequent analytical results confirmed DRO, GRO, benzene and toluene soil contamination in excess of the cleanup levels. Subsequent release investigation activities confirmed groundwater contamination of GRO, benzene and lead which exceeds cleanup levels.

Action Information

Action Date Action Description DEC Staff
7/7/1999 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77885 UST Piping Assessment report submitted by Bristol Environmental. Former Staff
7/7/1999 Site Added to Database Former Staff
11/20/1999 Update or Other Action Wastewater Treatment Plan approved by ADEC. Monica English
8/23/2000 Underground Storage Tank Site Characterization or Assessment UST Removal and Closure Report submitted by Bristol Environmental. Monica English
8/16/2001 Release Investigation Release Investigation workplan submitted by Bristol Environmental. Monica English
8/16/2001 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Added by the Administrator. Cynthia Pring-Ham
8/25/2004 Update or Other Action Bristol Environmental (consultant) calls to inform dept. of findings from monitor well sampling. No report submitted on groundwater quality. Informed consultant that report should be submitted for departmental review. Monica English
9/29/2004 Release Investigation Release Investigation report reviewed. Soil and groundwater contamination above site cleanup levels confirmed. Monica English
10/6/2004 Update or Other Action ADEC generated a request for a CAP based on information presented in RI report. Monica English
12/9/2004 Update or Other Action File number 2569.26.005 assigned and entered into the Fileroom database and Leaking Underground Storage Tank database. Alyce Hughey
3/2/2005 Update or Other Action ADEC provided comments and requested clarification for the proposed Corrective Action work plan. Monica English
3/25/2005 Update or Other Action Received Response from Bristol Environmental for ADEC comments/concerns to proposed work plan. Monica English
4/13/2005 Update or Other Action ADEC Comments regarding response by Bristol to departmental concerns for CAP. Monica English
4/25/2005 Update or Other Action Written clarification provided by Bristol Environmental for proposed CAP. Monica English
6/26/2005 Update or Other Action Additional clarification for proposed work plan provided by Bristol Environmental. Monica English
7/6/2005 Update or Other Action Conditional Approval issued by ADEC for proposed CAP to conduct additional assessment activities. Monica English
12/19/2005 Update or Other Action Phone conversation with consultant regarding scheduling a tentative meeting to discuss findings of assessment activities and future cleanup alternatives. Monica English
2/14/2006 Update or Other Action Phone conversation with consultant regarding scheduling tentative meeting to go over results for additional assessment activites conducted in 2005 and possible corrective action measure for future cleanup actions. Consultant was notified that a report for the assessment activities conducted in 2005 must be submitted for review prior to conducting a meeting. Monica English
4/4/2006 Update or Other Action ADEC sends correspondence to RP requesting a report of all assessment activities conducted during 2005 and a CAP for addressing contaminated soil and groundwater at this facility. Monica English
5/23/2006 Update or Other Action Corrective Action report received for September 2005 activities. Schedule meeting with consultant and RP to discuss tentative future Corrective Action measures. Monica English
10/9/2006 Update or Other Action Project manager changed from Monica English to Don Seagren, per Paul Horwath. Alyce Hughey
11/16/2006 Update or Other Action Project manager changed from Don Seagren to David Pikul, per Linda Nuechterlein and Paul Horwath. File transferred to Anchorage. Alyce Hughey
1/17/2007 Update or Other Action DEC attended a meeting with RP David Pierson here at DEC on 1/16/07. The discussion was lead by comment review ofhte September 2006 CAP report. DEC will be prepring a formal comment letter for submittal to the RP. Former Staff
2/1/2007 Document, Report, or Work plan Review - other DEC submitted comments on the report titled: Revision 1 Corrective Action Report Penair King Salmon, King Salmon, Alaska dated September 2006, prepared by Bristol Environmental & Engineering Services Corporation (Bristol). David Pikul
3/1/2007 Underground Storage Tank Site Characterization or Assessment Comments to the CAP were addressed and the report accepted by ADEC. Soil data was biased low due to the lack of methanol preservation. Bill O'Connell
3/27/2007 Update or Other Action DEC held a meeting today between Penn Air, Bristol Env. And DEC. It was determined that free product bailing will continue, DEC comment letter of January 23, 2007 will be addressed in the spring/summer field work report and Penn Air will implement additional groundwater characterization to ID leading edge of the plume. David Pikul
8/13/2007 Underground Storage Tank Site Characterization or Assessment Received work plan for additional chacraterization at PenAir King Salmon. Following a meeting between ADEC, PenAir, and their consultant, Shannon & Wilson, Penair will install up to four wells to delineate the extent of the dissolved phase hydrocarbon plume. Soil and groundwater samples will be collected, free product will gauged in MW-1 and MW-3 and recovered product will be evaluated for disposal. Bill O'Connell
11/13/2007 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 77885 (Autogenerated Action)
12/5/2007 Underground Storage Tank Site Characterization or Assessment Received Site Characterization Report for PenAir, November 2007. Three soil borings were advanced and completed as monitoring wells. Soil samples were collected from the groundwater interface and from one other interval based on field screening. Soil samples did not contain contaminants above Method Two migration to groundwater cleanup levels however the MRL for EDB was above the cleanup level so this data is inconclusive. Groundwater samples were collected from the new wells, MW8, MW9, and MW10, as well as existing wells MW3, MW5, MW6, and MW7. The samples from MW3 and MW6 contained petroleum hydrocarbons and EDB above Table C cleanup levels, samples from MW3, MW7, and MW9 contained lead above the Table C cleanup level. A sample from the PenAir drinking water well contained benzene at 0.0007 mg/l, below the drinking water MCL. Monitoring well MW1 contained 0.54 feet of product, while a sheen was observed on groundwater from MW3. Monitoring well MW4 was decommissioned. Bill O'Connell
12/6/2007 Exposure Tracking Model Ranking Updated Ranking Complete for Source Area: 77885 (Autogenerated Action)
12/27/2007 Conditional Closure Approved The Alaska Department of Environmental Conservation, Contaminated Sites Program, (ADEC) reviewed the report Site Characterization, PenAir Facility King Salmon Alaska dated November 2007. Based on the information provided to date, ADEC has determined that the Peninsula Airways Facility at the King Salmon airport does not pose an unacceptable risk to human health or the environment and shall be closed subject to the conditions established in the Record of Decision. Bill O'Connell
12/27/2007 Institutional Control Record Established Site closure is conditional on the following:1. Annual groundwater monitoring will be conducted in accordance with an ADEC-approved work plan. Ground water samples will be collected from monitoring wells MW-1, MW-2, MW-3, MW-5, MW-6, MW-7, and MW-9 so long as free product is not present in the well, and analyzed for DRO, GRO, BTEX, lead, and EDB. Additionally a drinking water sample will be collected from the PenAir well annually and analyzed for volatile organic compounds by EPA Method 524.2. The work plan must be submitted to ADEC for review by May 30, 2008. 2. Free product monitoring, collection, and disposal will be conducted in accordance with an ADEC approved work plan. Product will be monitored and collected as needed from MW-1 and MW-3 on a bi-weekly basis and a product collection log will be maintained and submitted to ADEC on a twice-yearly basis. The work plan must be submitted to ADEC for review by May 30, 2008. 3. A Notice of Environmental Contamination will be recorded on the ADEC database to document that there is residual contamination remaining on site and the conditions that are attached to the property. 4. Any proposal to transport soil or water off site requires ADEC approval in accordance with 18 AAC 78.274(b). 5. The duration and frequency of groundwater monitoring and product collection will be reviewed by ADEC on an annual basis, and adjusted as needed, with the first review occurring in December 2008. Bill O'Connell
5/16/2008 Update or Other Action Work Plan for 2008 groundwater monitoring in accordance with the 2007 ROD approved. Bill O'Connell
11/5/2008 Update or Other Action Received 2008 monitoring report for Penair King Salmon. Groundwater samples were collected from monitoring wells MW3, MW5, MW6, MW7, and MW9. MW2 was not located and MW1 had 6.75 feet of product in it. Analytical results found DRO at 10.1 mg/l in MW 3, GRO at 3.18 mg/l and benzene at 0.766 mg/l and 0.0235 mg/l in MW3 and MW6 respectively. EDB was detected above the cleanup level in MW3, MW5, and MW6 and the MRL for EDB was two orders of magnitude above the cleanup level in MW7 and MW9. Lead was also detected above the cleanup level in MW3, MW5, and MW7. The sample from the drinking water well at Penair did not contain detectable concentrations of contaminants. Bill O'Connell
4/14/2009 Update or Other Action PenAir provided product measurement logs for June 2008 to December 2008. Product thickness was measured from 6 inches to 3.78 feet in MW-3, however the amount recovered is not documented. MW-1 did not contain product during this time period, however this information and the product collection activities were impacted by equipment malfunctions. Bill O'Connell
5/15/2009 Update or Other Action Groundwater monitoring frequency changed to biennial after results show the contaminant concentrations as generally stable or decreasing. Free product recovery continues and all other conditions of the closure remain in effect. Bill O'Connell
2/1/2010 Update or Other Action Recieved 2009 product collection logs. Approximately 50 gallons of fuel were recovered from well MW-3 Bill O'Connell
8/12/2010 Document, Report, or Work plan Review - other Work Plan reviewed for 2010 groundwater monitoring in accordance with Record of Decision. Seven wells will be sampled and product levels gauged, if present. Bill O'Connell
10/29/2010 Document, Report, or Work plan Review - other Reviewed 2010 Groundwater Monitoring Report. Samples were collected in August 2010 from wellsMW3, MW5, MW6, MW7, and MW9. Free product was found in MW1 and MW2 could not be located. A drinking water sample was collected from the PenAir well in the cargo office bathroom. Contaminants were not detected in the drinking water sample, however the LOQ for EDB in the drinking water sample was one order of magnitude above the cleanup level. In the monitoring wells, GRO and DRO were detected in MW3 at 2.28 mg/l and 6.70 mg/l respectively. Benzene was detected above the cleanup level inMW3 and MW6 and EDB was detected above the cleanup level in MW3, MW6, and MW11. Lead was also detected above the cleanup level in MW3 at 0.106 mg/l. Bill O'Connell
11/2/2010 Document, Report, or Work plan Review - other Product recovery logs received from PenAir. From May-August 2010 approximately 33 gallon of product were recovered, primarily from MW-3, as MW-1 appears to have been buried during site grading activities. Bill O'Connell
8/21/2013 Document, Report, or Work plan Review - other Reviewed work plan for groundwater monitoring and free product recovery at PenAir King Salmon. Groundwater samples will be collected from monitoring wells MW-1, MW-2, MW-3, MW-5, MW-6, MW-7, and MW-9 provided that product is not present. A sample will also be collected from the onsite drinking water well. Product recovery will be conducted monthly from August to December 2013. Bill O'Connell
6/27/2014 Document, Report, or Work plan Review - other Reviewed Groundwater Monitoring and Free Product Recovery Report for PenAir King Salmon. Depth to water was measured in wells MW1, MW3, MW5, MW6, and MW9. MW2 and MW7 could not be located. MW1 contained 2.97 feet of product so no sample was collected. Contaminants were detected above cleanup levels in MW3 and MW6, with GRO detected up to 3.71 mg/l, DRO up to 10.56 mg/l, and benzene up to 0.51 mg/l, all in MW3 which is located nearest the source are. Downgradient wells MW5 and MW9 did not contain contaminants above cleanup levels indicating the plume remains stable. Product recovery was conducted in wells MW1 and MW3 between August 2013 and January 2014. Product was not encountered in MW3. A total of 22 gallons of product were removed from MW1 during this period, and was present at thicknesses ranging from 1.9 to 5.6 feet. A sample was also collected from the drinking water well; contaminants were not detected. Bill O'Connell

Contaminant Information

Name Level Description Media Comments
Benzene > Table C Groundwater
DRO > Table C Groundwater

Control Type

Type Details
CS Database Notation And Letter To Landowner/RP

Requirements

Description Details
Groundwater Monitoring Annual groundwater monitoring will be conducted in accordance with an ADEC-approved work plan. Ground water samples will be collected from monitoring wells MW-1, MW-2, MW-3, MW-5, MW-6, MW-7, and MW-9 so long as free product is not present in the well, and analyzed for DRO, GRO, BTEX, lead, and EDB. Additionally a drinking water sample will be collected from the PenAir well annually and analyzed for volatile organic compounds by EPA Method 524.2. The work plan must be submitted to ADEC for review by May 30, 2008.
Advance approval required to transport soil or groundwater off-site.
Other Free product monitoring, collection, and disposal will be conducted in accordance with an ADEC approved work plan. Product will be monitored and collected as needed from MW-1 and MW-3 on a bi-weekly basis and a product collection log will be maintained and submitted to ADEC on a twice-yearly basis. The work plan must be submitted to ADEC for review by May 30, 2008.

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State of Alaska Department of Environmental Conservation

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