Site Report: BLM Fire Service Dahl Creek
| Site Name: | BLM Fire Service Dahl Creek |
|---|---|
| Address: | Dahl Creek; , Kobuk, AK 99751 |
| File Number: | 480.26.001 |
| Hazard ID: | 23352 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 66.944573 |
| Longitude: | -156.907977 |
| Horizontal Datum: | WGS84 |
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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
In July 1994 the BLM Alaska Fire Service removed three 3000-gallon underground storage tanks (USTs) at the Dahl Creek Airport. Petroleum contaminated soil encountered during the UST removals was excavated and stockpiled on site. Although these tanks stored Jet-A and AVGAS, soil samples collected from the limits of the excavation were only analyzed for diesel range organics (DRO). In 1995 the stockpiled soils were sampled for gasoline range organics (GRO), DRO, and benzene, toluene, ethylbenzene, and xylenes (BTEX). Results were below cleanup levels and the soil was spread on site. To address data gaps from the 1994 sampling and to delineate the extent of remaining contamination, additional field work was performed in 2012. The locations of the former USTs was identified and a sampling grid established to encompass the source area. Eleven test pits were excavated and soil samples collected for GRO, DRO, BTEX, lead, and ethylene dibromide. Characterization activities identified two small areas of residual contamination with results for GRO, DRO, and benzene exceeding the migration to groundwater cleanup level but below the direct contact/ingestion and outdoor inhalation cleanup levels.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 7/1/1994 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST Site created in CSP for source area ID 77604 ADD; | Former Staff |
| 7/1/1994 | Site Added to Database | Former Staff | |
| 10/2/1995 | Underground Storage Tank Site Characterization or Assessment | SA1; Rec'd site assessment report on removal of aviation gasoline and jet fuel USTs 7/26/94. | Former Staff |
| 6/25/1996 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | LCAU; Removed (2) 3,000-gallon jet fuel & (1) 3,000-gallon aviation gasoline USTs 7/25-28/94. Approx. 44 cubic yards of contam. soil was removed and stockpiled on-site with 100 lbs. Wolfkill Weed & Feed lawn fertilizer & covered for a year. | Former Staff |
| 6/26/1996 | Underground Storage Tank Site Characterization or Assessment | SA1R; Removal of aviation gasoline & jet fuel USTs 7/26/94 indicated highest DRO=1,330 ppm. Approx. 44 cu. yds. contam. soil stockpiled on-site, sampled 7/20/95 after a year remediation w/ commercial fertilizer. Results=below ADEC cleanup levels for BTEX, GRO & DRO. Soils were spread on west end of ramp. | Former Staff |
| 1/28/2004 | Update or Other Action | Transferred DEC staff lead from John Carnahan | Cynthia Pring-Ham |
| 1/12/2007 | Exposure Tracking Model Ranking | Baseline ranking completed. | Evonne Reese |
| 3/14/2008 | Exposure Tracking Model Ranking | Updated ETM ranking completed because of new information regarding this site | Evonne Reese |
| 6/11/2008 | Update or Other Action | Sent a reintroduction letter to the R.P. | Evonne Reese |
| 8/3/2011 | Meeting or Teleconference Held | DEC staff (Melody Debenham and David Robinson) held a telephone conference with Don Maloney of ECC, Inc., the company contracted by BLM Alaska Fire Service to address DEC concerns. Staff provided more details on DEC concerns, and coordinated with Mr. Maloney on sharing of information on the site, and methods to adequately address the concerns on site. | David Robinson |
| 9/22/2011 | Update or Other Action | Provided comments on a work plan for site characterization received on 9/20/2011. The work plan was written to address data gaps identified from work done 1994-1996. | David Robinson |
| 4/30/2012 | Site Characterization Workplan Approved | Approved work plan after receiving a response to comments on 4/23/2012. The work plan describes the collection of at least 12 soil samples for laboratory analysis for GRO, DRO, BETX, and ethylene dibromide, as well as the installation of two temporary monitoring wells to a maximum depth of 30ft to determine the risk for groundwater contamination. | David Robinson |
| 1/7/2013 | Update or Other Action | Assigned to Melody Debenham | Fred Vreeman |
| 2/11/2013 | Site Characterization Report Approved | Approved the final site characterization report documenting the excavation of 11 test pits at the location of the former USTs to determine the extent of remaining contamination. Gasoline range organics (GRO), DRO, and benzene were detected above the migration to groundwater cleanup levels but below the inhalation/ingestion levels. A temporary monitoring well point was installed to a depth of 18.5 feet, however no water entered the well. | Melody Debenham |
| 2/22/2013 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 77604 Jet and aviation fuel USTs. | Melody Debenham |
| 3/11/2013 | Cleanup Complete Determination Issued | Melody Debenham |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | |
| GRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | |
| Benzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. |
No associated sites were found.