Division of Spill Prevention and Response

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Site Report: Denali Fuel Company


Site Name: Denali Fuel Company
Address: 8223 Hartzell Rd.;, Anchorage, AK 99520
File Number: 2100.26.151
Hazard ID: 24028
Status: Active
Staff: Chelsy Passmore, 9072697522 chelsy.passmore@alaska.gov
Latitude: 61.145688
Longitude: -149.848823
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

Surface and subsurface contaminated soil discovered when a 12,000 gallon diesel tank was removed in 1991. Heavy sheens and dissolved contamination identified in the shallow groundwater (about 6 to 9 feet below ground surface). During the tank removal 200 cubic yards of contaminated soil was excavated. Later in 1991 an additional 15 cubic yards contaminated soil was excavated, and in 2000 another 1,000 cubic yards of contaminated soil was excavated. All of the excavated soil was thermally treated. The latest soil sampling data shows up to 0.123 mg/kg benzene, 1,060 mg/kg GRO, and 790 mg/kg DRO remain in the ground. Three monitoring wells were installed in 1995, and five more in 2001. The groundwater flows generally to the southwest. Off property contamination from this site has been identified to the south and west. The full extent of the soil and groundwater contamination has not yet been determined. Public and private drinking water wells are in the area, the closest ones have been sampled and they meet drinking water standards.



Action Information

Action Date Action Description DEC Staff
10/2/1991 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77976 Site added to database. * Not Assigned
10/2/1991 Site Added to Database * Not Assigned
10/3/1991 Leaking Underground Storage Tank Cleanup Initiated - Petroleum 200 cubic yards of contaminated soil removed during the tank pull. Contaminated soil and groundwater remain. * Not Assigned
10/16/1991 Report or Workplan Review - Other An additional 15 cubic yards of contaminated soil removed from the former tank excavation. Robert Weimer
10/17/1991 Leaking Underground Storage Tank Corrective Action Underway 215 cubic yards of contaminated soil thermally treated at CleanSoils. Robert Weimer
1/1/1992 Underground Storage Tank Site Characterization or Assessment Tank removal site assessment identified diesel contamination in soil and groundwater. * Not Assigned
2/27/1992 Update or Other Action ADEC letter to Denali Fuel requesting release investigation and corrective action for the remaining soil and groundwater contamination at the site. Robert Weimer
9/18/1995 Release Investigation Reviewed release investigation plan. * Not Assigned
9/20/1995 Report or Workplan Review - Other Three soil borings were drilled and completed as monitoring wells. A drinking water well search was also conducted. Robert Weimer
10/9/1996 Update or Other Action ADEC letter requests groundwater monitoring and additional release investigation to define the extent of the remaining contamination at the site. Robert Weimer
11/20/1997 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: DENALI FUEL COMPANY * Not Assigned
11/28/1997 Update or Other Action ADEC letter again requests quarterly groundwater monitoring and release investigation. Robert Weimer
3/28/1998 Update or Other Action ADEC again sends a letter requesting groundwater monitoring and release investigation, as had been requested in the ADEC letter of October 9, 1996. Robert Weimer
10/8/1999 Update or Other Action ADEC again sends a letter requesting groundwater monitoring and release investigation, as had been requested in the ADEC letter of October 9, 1996. Robert Weimer
5/11/2000 Report or Workplan Review - Other Reviewed April 12, 2000 groundwater monitoring report. It identified groundwater contamination and that the extent had not been defined. Robert Weimer
5/12/2000 Update or Other Action ADEC letter requesting by June 15, 2000 a corrective action plan and additional monitoring wells to help define the extent of the groundwater contamination. Robert Weimer
9/7/2000 Update or Other Action ADEC receives corrective action workplan to excavate contaminated soil and have it thermally treated. ADEC issues a conditional approval letter the same day. Robert Weimer
11/3/2000 Site Visit ADEC staff visit site during a portion of the excavation work. Robert Weimer
1/26/2001 Update or Other Action ADEC letter requests a release investigation and work plan by 2/16/2001. The letter notes that the site work done by the RP's consultant did not follow the approved workplan, and that areas of the base and sidewalls of the excavation were not adequately assessed. * Not Assigned
2/5/2001 Update or Other Action RP's consultant submits workplan for installing 3 monitoring wells. This workplan was approved on 2/16/01. Robert Weimer
9/13/2001 Update or Other Action ADEC conditionally approves release investigation workplan for installing additional monitoring wells to help define the extent of groundwater contamination for this site. Robert Weimer
11/4/2002 Report or Workplan Review - Other 9/25/02 release investigation report documented shallow soil contamination remaining at the site. The full extent of this contamination has not been determined. ADEC letter requests a corrective action plan for the remaining soil and groundwater contamination at the site. Robert Weimer
5/1/2003 Update or Other Action ADEC approves corrective action plan for contaminated soils to ASR for thermal treatment. Robert Weimer
10/9/2003 Update or Other Action ADEC approves 9/30/03 Corrective Action Plan to excavate and treat the shallow BTEX, GRO, DRO contaminated soils at the site. Robert Weimer
10/23/2003 Update or Other Action Letter from RP proposing to do only limited groundwater monitoring and then possibly look at NFRAP with institutional controls instead of doing the work proposed in the approved corrective action plan. Robert Weimer
12/2/2003 Update or Other Action ADEC letter requesting groundwater monitoring and drinking water well sampling in June 2004. Letter also notes that the extent and risk of the soil contamination has not been defined so NFRAP can not be evaluated for this site. Robert Weimer
8/5/2004 Report or Workplan Review - Other June 16, 2004 groundwater monitoring event. Up to 8.73 mg/l DRO found and a sheen in one monitoring well (MW-6). Contamination levels have increased in 5 of the 7 monitoring wells, including the furthest downgradient monitoring well MW8, from the previous sampling event in September 2003. Plume appears to be increasing. Lab noted bubbles in 3 of the sampling vials (6 to 7mm of air at top of vial), which would result in bias low results for those samples. Nearby drinking water well sample was non-detect for this sampling event. Robert Weimer
10/17/2005 Report or Workplan Review - Other July 18, 2005 groundwater monitoring event. Up to 31.5 mg/l DRO and 1.6 mg/l GRO (MW-6 also had a sheen). Contamination levels have increased in 2 of the 4 monitoring wells. Plume appears to be increasing in some areas. Laboratory data sheets were not in the report. Nearby drinking water well sample was non-detect for this sampling event. Groundwater flow direction is generally to the southwest. Depth to groundwater is 7 to 11 feet below ground surface. Robert Weimer
2/12/2007 Report or Workplan Review - Other June 28, 2006 groundwater monitoring event. Up to 16.6 mg/l DRO and 0.794 mg/l GRO, and 1.19 ug/l benzene (MW-6 also had a sheen). Contamination levels have decreased from the previous monitoring event. Groundwater flow direction is generally to the southwest. Depth to groundwater is 6 to 8 feet below ground surface. Robert Weimer
10/5/2007 Report or Workplan Review - Other August 8, 2007 groundwater monitoring event. Up to 11.5 mg/l DRO and 0.436 mg/l GRO, and 0.754 ug/l benzene. Contamination levels have decreased from the previous monitoring event. Groundwater flow direction is generally to the southwest. Depth to groundwater is 6.19 to 8.66 feet below ground surface. Report missing required QA/QC checklist and QA/QC lab reports. Robert Weimer
10/10/2007 Update or Other Action RP's consultant will provide the missing required QA/QC checklist and QA/QC lab reports. Robert Weimer
4/16/2008 Exposure Tracking Model Ranking Site ranked on the new Exposure Tracking Model (ETM). The ETM is a new site ranking system that looks at, based on available data, the potential exposure pathways for the contamination remaining at the site. Robert Weimer
12/21/2010 Update or Other Action Have not received annual groundwater monitoring report yet. Robert Weimer
10/28/2011 Update or Other Action Still have not received requested annual groundwater monitoring report. Robert Weimer
6/24/2015 Update or Other Action Have not received requested annual groundwater monitoring reports. Robert Weimer
9/11/2015 Potentially Responsible Party/State Interest Letter Letter of interest sent to the potentially responsible party requesting work plan, and overdue sampling. Chelsy Passmore
7/19/2016 Update or Other Action Received response to ADEC's 9/11/2015 request for sampling. No work plan has been submitted for requested site delineation and remediation. Chelsy Passmore

Contaminant Information

Name Level Description Media Comments


Control Type

Type Details


Requirements

Description Details

There are no documents for this site report.