Skip to content
Back to Top

Site Report: ADOT&PF Klawock Airport Helipad


Site Name: ADOT&PF Klawock Airport Helipad
Address: Klawock Airport, On Airport Access Road from Big Salt Lake Road, Klawock, AK 99925
File Number: 1517.38.016
Hazard ID: 25368
Status: Active
Staff: Eileen Olson, 9072697527 eileen.olson@alaska.gov
Latitude: 55.583633
Longitude: -133.067521
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.

Problems/Comments

Concentrations of toluene above the Water Quality Standard has been identified in samples collected from a salmon stream adjacent to a Klawock Airport hangar. Site Investigation trenching at an unpaved helicopter pad found a crushed drum and metal debris. Soil samples collected from the trenches and the embankment near an aircraft hangar had detectable volatile organic chemical (VOC) field screen readings. In accordance with a DEC-approved QAPP, DOT is monitoring water quality on the impacted water body adjacent to the ongoing airport construction.

Action Information

Action Date Action Description DEC Staff
2/27/2009 Site Added to Database A new site has been added to the database Mitzi Read
3/12/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78727 name: Klawock Airport Helipad Mitzi Read
6/16/2009 Update or Other Action Anecdotal accounts suggested that the old fill site for the hangar may have wood chip and mill yard waste placed there in the 70’s and 80’s when the site was used in helicopter logging operations. The toe of the slope on the south side of the old fill site contained metal wastes such as hydraulic lines, exhaust parts, and at least 1 old drum. Soil samples collected at the toe of the new fill resulted in 2 of 4 samples having elevated VOC’s. Two soil samples collected on the west side of the runway – up drainage and upslope from the new fill area also had elevated VOC values similar to those down gradient at the toe of the new wood waste fill. Bruce Wanstall
3/23/2012 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78727 Klawock Airport Helipad. Bruce Wanstall
7/26/2012 Update or Other Action In accordance with the DEC-approved quality assurance project plan (QAPP) prepared by the DOT dated July 27, 2009 and the current QAPP dated June 12, 2012, Nortech collected water samples and measured temperature, pH, and dissolved oxygen with a Horiba, Multiparameter Water Quality Monitoring System U-22XD. Nortech collected samples at three sites MP1, MP2, and S4. The duplicate pair submitted blind to the laboratory ius s4 and s5. All four samples were analyzed for BNA, VOC, BOD, total and dissolved metals, ammonia and pH. Stream energy was low at MP-2 and S4 and stagnant at MP-1. Nortec observed algae growth at each sample location. Laboratory and field data quality criteria were within QAPP requirements for all analysis. Duplicates values were within RPD limits. LCS/LCSD, MS/MSD and surrogate recoveries were within accepted criteria for most analytes. The only criteria not met was low pH, likely due to the stagnant conditions found during sampling. Toluene and all other VOC’s, BNA and SVOC’s analyte results were below laboratory reporting limits. Bruce Wanstall
9/26/2012 Update or Other Action In accordance with DEC-approved QAPP by DOT for the Viking Lumber Project at the Klawock Airport, Nortech collected water samples and measured temperature, pH, and dissolved oxygen using a Horiba, Multiparameter Water Quality Monitoring System U-22XD. Samples were collected at sites MP1, MP2, and S4. MP-03 and MP-02 are a duplicate pair submitted blind to the laboratory. All samples were analyzed for, base/neutral acids (BNA), volatile organic compounds (VOCs), biochemical oxygen demand (BOD), dissolved metals, total metals, ammonia and pH. In contrast to conditions observed during the June, 2012 sampling event, stream energy was increased and algae growth reduced at each sampling location. Laboratory data quality criteria were within QAPP requirements for all analysis. Duplicates values were within RPD limits. LCS/LCSD, MS/MSD and surrogate recoveries were within accepted criteria for most analytes. Toluene and all other VOC’s, BNA and SVOC’s analyte results were below laboratory reporting limits. Bruce Wanstall
11/13/2012 Site Visit DEC site visit to inspect improvements to the apron and status of the helipad. Bruce Wanstall
2/28/2013 Update or Other Action Nortech measured field parameters and collected analytical samples at sites MP-01, MP-02 and S-4 at the Klawock Airport for the DOT Viking Lumber project. Nortech observed that in comparison to previous sampling events stream energy and tannin content in the water were elevated and algae growth on substrate appeared low. At sample location MP-01 Nortech observed the presence of new mill waste fill. Water at MP-01 was darkened with tannins, had elevated temperature and pH was lower than previous measurements. At the MP-02 outflow location water remained dark with tannins but pH had returned to a neutral level and temperature had normalized. MP-01 and MP-03 were the desigated field duplicate pair submitted blind to the laboratory with other samples for VOCs by methods 624 and 625, BNA, BOD, total and dissolved metals, ammonia and pH. Laboratory data quality were within QAPP requirements for all analysis and duplicate values were within realtive per cent difference limits. LCS/LCSD, MS/MSD and surrogate recoveries were within accepted criteria for most analytes. Sample results for each analyte (including COC toluene) were below laboratory reporting limits and each of the limits met the QAAP requirements. Bruce Wanstall
5/16/2013 Update or Other Action Nortech measured field parameters and collected analytical samples at sites MP-01, MP-02 and S-4 at the Klawock Airport for the DOT Viking Lumber project. In comparison to the previous sampling event in February 2012, Notech observed that tannin content in the water and algae growth on substrate was unchanged. Bruce Wanstall
2/15/2017 Update or Other Action ADOT&PF is advertising a contract to conduct additional investigation into buried debris that could generate the toluene detected in off site stream waters. Bruce Wanstall
10/10/2017 Update or Other Action Staff assigned changed from Sally Schlichting to Eileen Olson. Kathryne Roldan

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

There are no documents for this site report.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.
Continue     Close