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Site Report: Trailside General Store

Site Name: Trailside General Store
Address: 345 West Sterling Hwy, Homer, AK 99603
File Number: 2314.26.028
Hazard ID: 25046
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 59.641617
Longitude: -151.552018
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

Gasoline releases were observed surfacing through cracks in the asphalt and concrete pavement area at this gas station in the spring of 1999. Release investigation and corrective action work resulted in the excavation and removal of approximately 5000 cubic yards of heavily contaminated soils. The excavated soils were thermally remediated. Soil and groundwater contamination remained in the Sterling Highway R-O-W and immediately adjacent to, and under, the onsite building. Long-term groundwater quality monitoring and limited indoor air quality sampling is planned at this project site, in order to monitor the concentration of the remaining contamination.

Action Information

Action Date Action Description DEC Staff
4/29/1999 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77785 (Added by System) On April 29, 1999 ADEC received a report alleging a petroleum release from an underground storage tank. A department employee inspected the facility on April 29th, and confirmed that fuel product was surfacing through cracks in the concrete/asphalt surface. Former Staff
4/29/1999 Site Added to Database Former Staff
5/4/1999 Update or Other Action Paul Horwath sent a Notice of Release letter. Alyce Hughey
5/11/1999 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Release Investigation started on April 30, 1999, and on May 11, 1999 the underground storage tank was removed, soil samples were taken, and approximately 125 cubic yards of contaminated soil was excavated and placed on asphalt pavement and covered with a 10-mil plastic liner on-site. Former Staff
6/4/1999 Update or Other Action Letter from ADEC staff notifying responsible party of the requirement to proceed with a Release Investigation and addressing concerns/comments/work tasks. Alyce Hughey
10/29/1999 Update or Other Action Paul Horwath sent letter to Trailside (WACO) identifying the requirement to proceed with Corrective Action. A Corrective Action Plan is required to be submitted to ADEC by no later than November 12, 1999. The required time frame for implementation of the CAP is the fall season of 1999. Alyce Hughey
11/19/1999 Update or Other Action Second letter sent re-emphasizing the requirement to proceed with a Corrective Action Plan. Staff emphasized the requirement for soil remediation to occur during the Fall of 1999, and proceed with aggressive soil remediation. Alyce Hughey
11/19/1999 Update or Other Action Interim Corrective Action Plan received from Kent & Sullivan. ADEC staff did not feel that the proposed groundwater extraction fully met the objectives detailed in item 2 of Oct. 29, 1999 letter, and to edit to a 20-mil cover and to include the requirement of work plans for soil excavation, storage and treatment. Alyce Hughey
1/5/2000 Update or Other Action Third notice to responsible party notifing them of the requirement to proceed with aggressive remediation actions in response to releases at the facility no later than the Fall of 1999. Alyce Hughey
1/25/2000 Leaking Underground Storage Tank Corrective Action Underway Corrective Action Plan Approved by Paul Horwath, based on the December 16, 1999 Corrective Action Plan received December 17, 1999, and on the Jan. 5, 2000 Soil Treatment Workplan, that was amended through submittal of a Jan. 14 and Jan. 24 letter. Alyce Hughey
4/13/2000 Update or Other Action A Notification of Deficiency letter was sent to the Responsible Party requesting that the completion of the release investigation be completed to identify the extent of soil and groundwater contamination and the extent of the offsite migration along the adjacent utility trenching. Alyce Hughey
4/26/2000 Update or Other Action Warning Letter sent to the Responsible Party requiring them to provide ADEC with a written schedule for accomplishing the completion of the release investigation and the completion of the thermal remediation of the remaining stockpiled soils. Alyce Hughey
4/28/2000 Update or Other Action A Notification of State Funded Work letter sent to the Responsible Party informing them that the State of Alaska is hiring a contractor, Southeast Construction, to secure the excavation pit in an effort to protect public health and safety. Alyce Hughey
4/28/2000 Update or Other Action Request for State Lead Funding was sent by Paul Horwath. Alyce Hughey
6/12/2000 Update or Other Action Request for Proposal sent to Shannon and Wilson on June 12, 2000, and another Request for Proposal sent to IT Alaska on June 13, 2000. Alyce Hughey
10/9/2000 Update or Other Action Notice to Proceed issued to Shannon and Wilson for their October 6, 2000 Proposal for Excavation Stabilization, Groundwater Diversion, Contaminated Soil Excavation, and Release Investigation. Only Modifications was 11 soil samples will be collected and analyzed for GRO and BTEX by AK 101 Modified by SW 8021Bb. Alyce Hughey
4/18/2002 Document, Report, or Work plan Review - other Paul Horwath approved the Trailside/ADOT&PF Soil Remediation Workplan, Final. Alyce Hughey
5/8/2002 Update or Other Action Paul Horwath sent a letter to Susan Reeves from Foster, Pepper, Rubini & Reeves requesting Analytical Results of Water Sample from the 1000 gallon water sampling tank located at Red Rose Rentals property before June 2002. Alyce Hughey
8/7/2002 Update or Other Action Monica English received a complaint regarding dust at the NPR's Soil Treatment Process at the ADOT Homer Maintenance Facility. NPR currently was treating the Trailside General Store soil. Alyce Hughey
12/3/2002 Update or Other Action Paul Horwath issued an approval letter for 2900 cubic yards of contaminated soil that was remediated to meet ADEC cleanup levels. Alyce Hughey
6/10/2003 Document, Report, or Work plan Review - other Paul Horwath issued an approval letter for the May 23, 2003 Release Investigation and Site Risk Evaluation Work Plan. Approval was granted based on the modified Figure 1 Site Plan submitted on June 10, 2003. The work plan was implemented by ADEC term contractor Shannon and Wilson in the fall of 2003, and a final report was received from Shannon and Wilson in January, 2004. Alyce Hughey
10/15/2004 Update or Other Action File number 2314.26.028 assigned and entered into the Fileroom DB and LUST DB. Alyce Hughey
7/13/2005 Update or Other Action Using Figures 1 and 2 from the Emergency Response, UST System Closure and Release Investigation for Trailside General Store report, from Alaska Lining and Retrofit, dated September 10, 1999 in conjunction with TopoZone Pro and the KPB Parcel lookup, entered the coordinates for the site. Metada included No Topo Base Map, TopoZone Pro Street Map, Black and White Aerial Photo, on a Medium Size Map, View Scale 1:10,000, Coordinate Datum NAD27. High degree of confidence in accuracy of location. Alyce Hughey
3/28/2007 Exposure Tracking Model Ranking Initial Site Ranking completed. Paul Horwath
5/29/2008 Cleanup Complete Determination Issued Residual soil and groundwater contamination remains at this property, both onsite, and offsite in adjacent road right-of-ways. COCs = GRO and benzene. Paul Horwath
9/24/2008 Site Characterization Workplan Approved Reviewed and approved a work plan from term contractor SLR Alaska to sample the GW monitoring wells at the site and to decommission GW monitoring well MW-5. Field work to be completed September 26, 2008. Paul Horwath
10/29/2008 Institutional Control Record Established Institutional Controls established and entered into the database. Paul Horwath
12/12/2008 Document, Report, or Work plan Review - other ADEC term contractor SLR provided a copy of their December 2008 Former Trailside General Store Ground Water Sampling Report, Homer, Alaska. Groundwater sampling was conducted on 9/28/08, and water samples were analyzed for BTEX and GRO. Groundwater collected from MW-4 and from the groundwater interceptor and diversion system collector tank exceeded ADEC groundwater cleanup level of 0.005 mg/L. Of greatest significance was the concentration of benzene reported in the collector tank at 0.102 mg/L. This indicates that the residual contaminated soils in the Sterling Highway R-O-W that could not be removed by excavation have leached sufficient contamination to have migrated in groundwater through the clean excavation backfill soils and impact GW quality being collected in the groundwater interceptor and diversion system collection piping. ADEC should re-sample the water in the collector tank and determine if the benzene concentration is again reported at these elevated concentrations. Prior concentrations were near non-detect, so this elevated benzene concentration is significant. Paul Horwath
12/28/2010 Site Characterization Report Approved Term contractor SLR's 2010 Ground Water Monitoring Report, dated November 2010 was reviewed. GW samples were collected in May 2010. Groundwater quality in the 5 MWs sampled met ADEC GW cleanup levels. Groundwater in the 1000-gallon buried steel tank exceeded ADEC groundwater cleanup levels for benzene, being detected at 40.6 and 31.7 ug/L (parent and field duplicate samples). Paul Horwath
12/29/2010 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77785 Former USTs. Paul Horwath
10/31/2011 Exposure Tracking Model Ranking Adminstrative action - updated ranking with ETM has been completed for source area 77785 Former USTs. Evonne Reese
3/23/2012 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77785 Former USTs. Paul Horwath
7/30/2012 Update or Other Action The groundwater monitoring wells and the 1000-gallon tank were sampled June 12, 2012. Benzene was detected in the 1000-gallon tank at 44 ug/L and 34 ug/L in the parent sample and field duplicate sample, respectively. No groundwater cleanup levels were exceeded in any of the groundwater monitoring wells. Paul Horwath
6/27/2013 Document, Report, or Work plan Review - other Received and reviewed the May 2013 Groundwater Sampling Report prepared by ADEC Term Contractor Shannon & Wilson. Benzene was not detected in the water samples collected from 1000-gallon sampling tank, which is a significant improvement in water quality, compared to the past three (3) sampling events which were performed in 2008, 2011, and 2012. The water quality in the five (5) remaining groundwater monitoring wells remains similar to, and consistent with, prior years. Fuel contamination is not being detected in the monitoring wells located downslope (down-gradient) of the building. The cleanup work performed at this site has likely prevented groundwater contamination from migrating down gradient to adjacent properties. Another groundwater sampling event is scheduled to be performed in 2014. Paul Horwath
11/6/2014 Institutional Control Update Current project manager chooses to retain management of the site at this time. Kristin Thompson
1/26/2016 Update or Other Action Attach closure decision documents and related documents to this database for public access and review. Paul Horwath
9/15/2016 Update or Other Action At this time, the current project manager chooses to retain management of this site which has institutional controls. IC Unit

Contaminant Information

Name Level Description Media Comments
GRO > Human Health/Ingestion/Inhalation Soil High concentrations of automotive gasoline remained in the Sterling Hwy right-of-way.
Benzene > Table C Groundwater Benzene contamination is detected in one GW monitoring well, and in the groundwater diversion system 1000-gallon sampling tank at concentrations exceeding Table C (5 ug/l).
Benzene > Human Health/Ingestion/Inhalation Soil It is likely that benzene remains in concentrations exceeding healthbased ingestion/inhalation in the Sterling Hwy ROW and adjacent to the building foundation.

Control Type

Type Details
Notice of Environmental Contamination NEC with residual soil and groundwater contamination is recorded with the Homer ADNR Land Recorder's Office
Local Ordinances, Databases, Zoning Restrictions City of Homer code 17.04.150 requires that this property be served by the City of Homer's community water system.

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Excavation / Soil Movement Restrictions Prior ADEC approval required.
Groundwater Monitoring Long-term groundwater quality monitoring required, currently on an annual basis. The owner/operator of this property shall not disturb the five remaining groundwater monitoring wells and the groundwater interceptor and diversion system, including the 1,000-gallon collection tank. In the event any of these items are damaged the property owner/operator shall, upon knowledge, notify ADEC promptly.
Groundwater Use Restrictions Additional groundwater wells may not be installed without the prior approval of ADEC.
Maintenance / Inspection Of Engineering Controls The asphalt pavement is required to remain, and be maintained.
Air Quality Monitoring Periodic indoor air sampling may be performed.

No associated sites were found.

Missing Location Data

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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