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Site Report: Old Wasilla Airport - Lot 3

Site Name: Old Wasilla Airport - Lot 3
Address: Lot 3, Block 100, NE of Parks Hwy & Lucille, Wasilla, AK 99687
File Number: 2265.38.026
Hazard ID: 1258
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 61.584090
Longitude: -149.458530
Horizontal Datum:

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

Toluene and TPH and VPH in septic system. Methylene chloride in septic system. Test bore in soil contains TPH and methylene chloride. 12/03/91 assessment received. ADEC response 01/23/92 said more investigation needed. Soil contamination has been cleaned up and soil remediated. On-going groundwater monitoring on Lot 3. Low levels of volatiles in groundwater, just above drinking water MCLs. Project nearly completed. Lot 3, Block 100, Wasilla Airport. Last staff assigned was Krieber (2/12/97).

Action Information

Action Date Action Description DEC Staff
12/3/1991 Preliminary Assessment Approved Consultant submitted assessment. Former Staff
1/1/1992 Site Added to Database Test bore in soil contains TPH and methylene chloride. Former Staff
1/23/1992 Preliminary Assessment Approved (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Reviewed assessment and determined further investigation needed. Former Staff
12/18/1992 Site Ranked Using the AHRM Insufficient comments provided to allow proper audit of scoring method. Former Staff
2/17/1993 Update or Other Action (Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Former Staff
4/8/1993 Cleanup Plan Approved (Old R:Base Action Code = CAPR - Corrective Action Plan Review (LUST)). Former Staff
9/14/1993 Update or Other Action (Old R:Base Action Code = FI - Field Inspection (General)). Former Staff
9/17/1993 Update or Other Action (Old R:Base Action Code = FI - Field Inspection (General)). Former Staff
9/17/1993 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Former Staff
9/17/1993 Update or Other Action (Old R:Base Action Code = RAU - Remedial Actions Underway (General)). Former Staff
9/24/1993 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Review of a remediation plan and response from ADEC. Former Staff
9/24/1993 Update or Other Action (Old R:Base Action Code = TRET - Treatment, Selection). Submittal of a soil treatment plan for contaminated soil. Former Staff
2/28/1994 Update or Other Action (Old R:Base Action Code = MS - Monitoring/Sampling). ADEC reviewed monitor well sample results. Former Staff
5/16/1994 Update or Other Action (Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Soil cleanup meets target levels, closure pending spring and fall groundwater monitoring results. Former Staff
9/6/1994 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). The soil has been satisfactorily treated. Former Staff
11/8/1994 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Conditional closure approved pending ground water samples obtained from MW-4, in May and September, 1995, be submitted for department review and approval which show acceptable contaminant levels; and Mike Krieber
5/23/1995 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed a ground water monitoring report. Methylene chloride level has decreased significantly. Tetrachloroethylene level is similar to past sampling results. Both compounds are still above MCLs. Mike Krieber
8/8/1995 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed a ground water monitoring report. It appears that there may be a "smear zone" associated with the methylene chloride, based on an apparent correlation between the depth of ground water and the contamination level. Mike Krieber
3/1/1996 Update or Other Action (Old R:Base Action Code = RARR - Remedial Action Report Review (CS)). Reviewed a GW monitoring report. Request for closure denied. A risk assessment must be approved by ADEC before undertaking. Mike Krieber
7/5/2000 Site Number Identifier Changed Changed workplan from 01 to 09 to reflect presence of methylene chloride contamination. Former Staff
10/19/2004 Institutional Control Record Established Decision document indicated the IC would be a database entry and notification that low levels contamination (PCE) remains on site in soil and groundwater. Monitor Well MW 4 should be decommissioned following confirmation that groundwater meets Table C levels. ADEC approval needed for soil/groundwater transport off site. Jim Frechione
10/19/2004 Long Term Monitoring Established Eric Henry
10/19/2004 Conditional Closure Approved The property (Old Wasilla Airport) is now owned by the City of Wasilla. The area has drinking water supplied by a public drinking system. The city plans to use the land for Civic buildings and public parks. The area of PCE contamination is small and stable and is not considered a threat to human health or the environment. Eric Henry
10/20/2004 Update or Other Action File number issued 2265.38.026. Aggie Blandford
8/29/2012 Update or Other Action Staff changed from Rich Sundet to IC Unit. Kristin Thompson
9/26/2012 Institutional Control Compliance Review IC review conducted. Evonne Reese
3/28/2013 Long Term Monitoring Complete Administrative action on 5/1/2013. Kristin Thompson
6/8/2015 Institutional Control Update Scheduled to send an IC reminder letter. Evonne Reese
6/22/2015 Institutional Control Update An IC reminder letter was issued to the responsible party on this date. Kristin Thompson
6/21/2018 Institutional Control Compliance Review IC compliance review conducted. Closure/IC Details updated. ICs Verification letter issued. Reminder system set to follow-up every three years. Kristin Thompson
8/15/2024 Institutional Control Compliance Review IC compliance review completed on this date. An IC reminder letter was issued to the landowner. The next review will be in three years’ time. Gaige Robinson

Contaminant Information

Name Level Description Media Comments
Tetrachloroethene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
Tetrachloroethene > Table C Groundwater

Control Type

Type Details
CS Database Notation And Letter To Landowner/RP Low levels of PCE remain on site in soil and groundwater. The property is owned by the City of Wasilla and indicated the land will be reserved for public purposes and supplied by public water.

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site. Standard condition. Low levels of PCE were detected in soil and groundwater. No risk on site but would require review off site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) Standard condition.
Groundwater Use Restrictions Irrigation wells at the Old Wasilla Airport are to be used only for irrigation purposes and not for human consumption.
Periodic Review ADEC will conduct a review of site conditions every three years.
Other MW-4 will need to be properly decommissioned following confirmation that the groundwater has achieved applicable cleanup levels.
Restricted to Recreational Land Use Future plans and development will be for public / recreation use and not for residential development on this property.

No associated sites were found.

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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