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Site Report: Maritime Helicopters UST 2

Site Name: Maritime Helicopters UST 2
Address: 3520 FAA Road, Homer, AK 99603
File Number: 2314.26.038
Hazard ID: 27211
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 59.641949
Longitude: -151.498052
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

In December 2019 a 6,000-gallon underground storage tank (UST #2), containing kerosene (jet fuel), along with associated fuel and vent lines were removed from the ground at Maritime Helicopters at the Homer airport. The fueling system included a fuel line (approximately 116 feet long) to a remote fuel fill port north of the UST and fuel line (approximately 171 feet long) to a dispenser on the tarmac south of the UST. During excavation of the piping leading to the remote fill port, petroleum contamination was encountered at a pipe joint approximately 40-50 feet from the fill port along FAA Road. The release visibly appeared to impact soil for approximately 10-15 feet along the pipeline. Soil from all three areas (UST, fill line, and dispenser) were field screened. The total volume of soil excavated from all three areas was approximately 220 cubic yards. Excavated soil was stockpiled on site. Groundwater on site ranged from 1 foot below ground surface (bgs) at the tarmac dispenser to 9 feet bgs at the UST location. Analysis of stockpiled soil indicated ethylbenzene, naphthalene, and benzene were above ADEC cleanup levels. Disposition of stockpiled soil needs to be confirmed. Confirmation samples from excavation limits confirmed contaminants remaining were below cleanup levels.

Action Information

Action Date Action Description DEC Staff
5/5/2020 Workplan Requested Cheryl Page sent enforcement letter, referencing the comments,suspense date of June 4, 2020 to correct deficiencies and submit a revised SARI Report. Given there are Contaminates Of Concern above cleanup levels remaining in the stock piles, ADEC cannot issue a closure letter at this time. Additional characterization and cleanup will be necessary. Land spreading COULD be used as a possible cleanup technique. ADEC requested that the RP submit a Work Plan, in the May 5, 2020 letter sent to the RP, and indicate where, how thick, potential surface water impacts, and ADEC can determine if COCs are suitable to this technique if this is a route they would like to take. Jessica Hall
5/15/2020 Site Added to Database A new site has been added to the database Mitzi Read
5/18/2020 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST site created in CSP database for source area 6,000-Gallon Kerosene UST #2, 80576 Mitzi Read
5/19/2020 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Jessica Hall
6/24/2020 Document, Report, or Work plan Review - other Sent RP comment letter on Work Plan for Maritime Helicopters, UST #84 Removal, dated 6/5/2020. Jessica Hall
6/24/2020 Document, Report, or Work plan Review - other Sent RP Comment Letter on Site Assessment & Mitigation Report Maritime Helicopters, UST #84 Removal, dated 6/8/2020. Jessica Hall
6/26/2020 Document, Report, or Work plan Review - other Sent RP Closure Evaluation Letter. Jessica Hall
8/12/2020 Document, Report, or Work plan Review - other Sent RP, Bob Fell and Geoff Coble of Coble Engineering, comments on Final Report, received by ADEC on August 3, 2020. Spoke With Geoff on the phone and advised we should receive the final report by the end of October 2020. Jessica Hall
8/28/2020 Update or Other Action Replied to response to comments on letter sent on 8/12/2020.Advised RP to address the comments and any requests of needed information and incorporate into the final report and submit in the Final report. Jessica Hall
9/9/2020 Potentially Responsible Party/State Interest Letter Potentially Responsible Party/State Interest Letter sent to RP, Bob Fell. Jessica Hall
9/17/2020 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 80576 name: 6,000-Gallon Kerosene UST #2 Jessica Hall
9/17/2020 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 80576 6,000-Gallon Kerosene UST #2. Jessica Hall
9/25/2020 Update or Other Action Sent the RP, Maritime Helicopters, Inc., a Cleanup Complete Determination letter. Jessica Hall
9/25/2020 Cleanup Complete Determination Issued Contamination remains in the surface soil but is below human health ADEC cleanup levels & contamination remains in the sub-surface, but is below human health ADEC cleanup levels. Cleanup complete determination - Remaining contamination in soil is below approved cleanup levels. This site will receive a “Cleanup Complete” designation on the Contaminated Sites Database, subject to the following standard conditions. 1. Any proposal to transport soil or groundwater from a site that is subject to the site cleanup rules or for which a written determination from the department has been made under 18 AAC 75.380(d)(1) that allows contamination to remain at the site above method two soil cleanup levels or groundwater cleanup levels listed in Table C requires DEC approval in accordance with 18 AAC 78.600(h). A “site” as defined by 18 AAC 78.995(134) means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership. 2. Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited. 3. Groundwater throughout Alaska is protected for use as a water supply for drinking, culinary and food processing, agriculture including irrigation and stock watering, aquaculture, and industrial use. Contaminated site cleanup complete determinations are based on groundwater being considered a potential drinking water source. In the event that groundwater from this site is to be used for other purposes in the future, such as aquaculture, additional testing and treatment may be required to ensure the water is suitable for its intended use. Jessica Hall
9/25/2020 Institutional Control Record Removed Institutional Controls have been removed. Jessica Hall

Contaminant Information

Name Level Description Media Comments
Ethylbenzene 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.
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)
Hazard ID Site Name File Number
23632 Maritime Helicopters UST 1 2314.26.024

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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