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Site Report: Chignik NorQuest Plant

Site Name: Chignik NorQuest Plant
Address: South shore of Anchorage Bay, Chignik, AK 99564
File Number: 2531.38.002
Hazard ID: 3776
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 56.294223
Longitude: -158.402492
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

This site has six areas of concern. 1. NorQuest Tank Farm consists of 13 tanks. Benzene concentratons of 0.157 milligrams per kilogram (mg/kg), and diesel range organics (DRO) concentrations of 4,820 mg/kg. 2. NorQuest Day Tank 1 consists of one 1,000-gallon and one 500-gallon aboveground storage tank (AST) with no contamination. 3. NorQuest Day Tank 2 is one 1,000-gallon diesel tank with gasoline range organics (GRO) concentrations of 448 mg/kg and DRO concentrations of 1,910 mg/kg. 4. NorQuest Day Tank 3 is one 1,000-gallon AST with Benzene concentrations of 0.100 mg/kg and DRO concentrations of 1,910 mg/kg. 5. NorQuest Day Tank 4 is one 1,500-diesel AST with no contamination. 6. Proposed Tank Farm is the proposed area of the new tank farm. Soil concentrations of Benzene at 26.8 mg/kg, Toluene at 1,240 mg/kg, Ethylbenzene at 455 mg/kg, Xylenes at 2.348 mg/kg, GRO at 12,300 mg/kg, and DRO at 4,890 mg/kg. Groundwater concentrations of Benzene at 7.24 milligrams per liter (mg/L), Toluene at 116 mg/L, Ethylbenzene at 19.9 mg/L, Xylenes at 98.6 mg/L, GRO at 539 mg/L, and DRO at 67.1 mg/L. Excavation concentrations of GRO at 4,830 parts per million (ppm), DRO at 5,070 ppm, residual range organics (RRO) at 11,500 ppm, Benzene at 13.6 ppm, Toluene at 449 ppm, Ethylbenzene at 214 ppm, and Xylenes at 1,315 ppm. Approximately 30 cubic yards of contaminated soil was excavated from test pits, and 1,700 cubic yards was excavated and stored off site on June 16, 2002. Approximately 4,700 cubic yards of soil is impacted from release. Water supply is from Indian Creek which has a dam and a reservoir. A well is available as a secondary supply of water. The contacts for Chignik are the following: Calvin Skonberg, President; Phone: 749-2230. Lars Anderson, President; Phone: 749-2445; Fax: 749-2423.

Action Information

Action Date Action Description DEC Staff
3/1/2002 Update or Other Action Groundwater Assessment Report was conducted by HartCrowser. Four groundwater monitoring wells were installed around the proposed tank farm area. Significant petroleum (weathered gasoline) contamination was observed in the groundwater sample collected from MW-2. MW-1 and MW-3 also contained petroleum contamination but at a lessor extent than MW-2. Petroleum contamination appears to be concentrated in an area west of the existing tank farm. It is possible from the sample results found in MW-1, that contaminants may impact the surface water of Anchorage Bay to the north of MW-1. No measurable free-phase product was encountered on the groundwater. Groundwater levels in the area were noted to fluctuate in concert with tidal activity (most likely brackish). Groundwater contaminant levels were up to 3.36 mg/l benzene and 539 mg/l GRO. Deborah Williams
6/14/2002 Interim Removal Action Approved Approximately 1,700 cubic yards of impacted soil was excavated and stockpiled in a storage cell. The excavation was about 10 to 11 feet deep and groundwater was encountered at about 9 feet bgs. Following the excavation and collection of confirmation samples, 1,000 pounds of an oxygen releasing compound (ORC) was placed at the soil/groundwater interface. The excavation samples contained a maximum of 6,120 ppm GRO, 5,070 ppm DRO, 11,500 ppm RRO, 13.6 ppm benzene, 449 ppm toluene, 214 ppm ethylbenzene, and 1,315 ppm xylenes. Deborah Williams
12/18/2002 Site Added to Database GRO and DRO contamination. Deborah Williams
12/19/2002 Site Ranked Using the AHRM Preliminary ranking. Deborah Williams
4/27/2004 Update or Other Action Site evaluated with TAPL funds due to Norquest participating in Denali commission work as the central operator of Chignik's only tank farm. Due to loss of TAPL funding to the Alaska Energy Authority, no further work can be funded by ADEC at this time. Mike Jaynes
4/27/2004 Update or Other Action Site assessment information copied and sent to Greg Soule at Norquest office in Seattle. Mike Jaynes
6/16/2004 Update or Other Action Site is a former TAPL site. Mike Jaynes
7/13/2004 Update or Other Action File number changed from 2531.42.002 to 2531.38.002. Sarah Cunningham
4/10/2006 Update or Other Action Project manager changed from Dave Pikul to Don Seagren, per Paul Horwath. Alyce Hughey
4/10/2006 GIS Position Updated Using Figures 1 and 2 from a Site Reconnaissance and Assessment Rural Bulk Fuel Tank Farm Remediation Projects, Chignik, from HartCrowser, dated January 2002, in conjunction with TopoZone Pro, entered the coordinates for this site. Metadata includes USGS Topo Map 1:63K, on a Medium Size Map, view Scale 1:24,000, Coordinate Datum NAD83. Moderate to High degree of confidence in accuracy of location. Alyce Hughey
9/14/2006 Site Characterization Workplan Approved Approved work plan for assessment to detemine current site conditions. Provided Trident/NorQuest a copy of reports missing from their file as well as a copy of the entire ADEC file. Will also be contacting AEA/AIDEA in an effort to obtain any addtional reports that may be missing from ADEC's file. This information will be reviewed this winter to develop a plan to be able to being the site to closure. Donald Seagren
8/7/2007 Site Characterization Report Approved Reviewed Soil & GW Sampling report dated 11 July 07. Also discussed this site and Trident sites in King Salmon, Sand Point and the Chignik Pride sites with Rory Galloway. Soil and GW contamination exists on the site above ADEC cleanup levels. However, additional site cleanup is limited by site infrastructure. GW is tidally influenced and is not used as a DW source. Should contaminated areas become accessible, future assessment and/or remediation will be required at that time. Quarterly GW monitoring for the first year followed by semi-annual monitoring will be required. The Department realizes the expense and logistical problems associated with work at this location and may be willing to modify the monitoring requirements dependent upon discussion with Trident Seafoods. Donald Seagren
11/7/2007 Update or Other Action Reviewed Summary Memo report on Groundwater Sampling September 2007, dated 31 October 2007. GRO & BTEX constituents were found in MW2 and its duplicate, exceeding ADEC cleanup levels. During this sampling event, the other 3 MWs on site did not have detectable petroleum hydrocarbon concentrations. The groundwater monitoring program will continue. Requested a completed & signed ADEC Lab Data Review Checklist which was not included in the report. Donald Seagren
6/11/2008 Update or Other Action Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein. Alyce Hughey
11/26/2010 Document, Report, or Work plan Review - other Reviewed the Summary Memo Groundwater Sampling August 2010, dated September 29, 2010, from G-Logics for Paul Horwath. During the August 7, 2010 groundwater sampling event only one well located south of the current tank farm is detecting GRO and DRO above the groundwater cleanup levels. The other three wells are either testing non-detect for all the analytes tested for or minor concentrations below the groundwater cleanup levels. Since 2002, when groundwater sampling began, the groundwater quality has shown a significant improvement. Alyce Hughey
7/25/2011 Site Characterization Workplan Approved Reviewed and approved the G-Logics, Inc.'s July 19, 2011 Workplan for Groundwater Sampling, August 2011. Paul Horwath
12/23/2011 Document, Report, or Work plan Review - other Reviewed the Summary Memo Groundwater Sampling Report August 2011, dated October 25, 2011, from G-Logics. During the August 18, 2011 groundwater sampling event, one well located south of the current tank farm detected Benzene at 0.2740 mg/L and GRO at 5.54 mg/L. Two wells tested were non-detect for all the analytes, and one well detected RRO at 0.326 mg/L. The groundwater quality has shown significant improvement since 2002 with only one monitoring well detecting concentrations above the groundwater cleanup levels. Alyce Hughey
7/18/2012 Site Characterization Workplan Approved Reviewed and approved the Workplan for Site Assessment September 2012 for the NorQuest Property, contingent on the following comments and recommendations: 1)As the test pit soils are placed back into the excavation during the construction of your monitoring wells, we recommend that water saturated soils be placed back into the water table surrounding the monitoring well screens. Because these are not traditionally constructed wells, we recommend - but do not require - that the wells be allowed to equilibrate over a period of time before they are sampled. Additional purging of the newly installed wells may help achieve equilibrium in a lesser period of time. 2) We will generally always require at least two samples to be collected from newly installed monitoring wells. One sampling could occur following installation. Another sampling event will normally be required after a period of weeks, or even months, has lapsed. Peter Campbell
6/7/2013 Document, Report, or Work plan Review - other Reviewed the 2012 Subsurface Exploration Report, dated May 9, 2013, prepared by G-Logics. On September 11 through 20, 2012 eight test pits completed into monitoring wells, with soil and groundwater samples collected in the areas of the Former Day Tank 2, Former Day Tank 3, and Former Tank Farm (GL-MW-3 through GL-MW-10). The Former Day Tank 2 area soils detected DRO at 10,100 mg/kg and benzene at 0.111 mg/kg at 10 ft bgs, and in groundwater DRO at 15.4 mg/L and benzene at 0.0195 mg/L, with salinity at 1,480 to 14,500 ppm. The Former Day Tank 3 area soils detected DRO at 257 to 6,710 mg/kg, benzene at 0.0430 to 0.0991 mg/kg and ethylbenzene at 7.45 to 11.2 mg/kg at 7 to 11.5 ft bgs, and in groundwater DRO at 1.57 and 1.86 mg/L, with salinity at 2,890 ppm. The Former Tank Farm area soils detected DRO at 975 to 8,910 mg/kg and benzene at 0.0645 and 0.390 mg/kg at 6 to 12 ft bgs, and in groundwater DRO at 3.76 and 5.98 mg/L, with salinity at 5,290 to 16,200 ppm. No soil samples were collected in the Current Tank Farm area in 2012. Groundwater samples had DRO at 3.49 mg/L, and salinity at 3,100 ppm. Based on the analytical data of salinity, the groundwater in all areas is brackish and not a good source o drinking water. In addition the area and community of Chignik is supplied by a reservoir located approximately a mile southwest and up-gradient of the subject property. Alyce Hughey
9/6/2013 Cleanup Plan Approved Approved the G-Logics' September 5, 2013 Workplan for an Additional Site Assessment, 2013. Paul Horwath
1/28/2014 Final Cleanup Report Reviewed Reviewed the 2013 Subsurface Exploration Report, dated January 15, 2014, prepared by G-Logics. On September 18, 2013 five test pits were advanced in the area of the Former Day Tank 2 for assessment of the shallow soil. The surface soil samples collected in the area of the Former Day Tank 2 Area concentrations were below the ADEC ingestion soil cleanup levels, however, the subsurface soil samples collected at a depth of 9 and 11 feet bgs, did detect DRO at 16,800 and 23,200 mg/kg and GRO at 2,110 mg/kg, above the ADEC ingestion soil cleanup levels. On September 15, 2013 five test pits were advanced in the area of the Former Tank Farm, for assessment of the shallow soil. Surface soil samples collected in the area of the Former Tank Farm Area concentrations were below the ADEC ingestion soil cleanup levels. On September 12, 2013 surface water samples were collected from two test pits on the beach near Anchorage Bay, and from one test pit on the beach near Indian Creek. The surface water samples collected along the Anchorage Bay and Indian Creek did not exceed the Alaska Water Quality Standards. All the existing groundwater monitoring wells were sampled with DRO at concentrations of 1.50 to 40.8 mg/L. Alyce Hughey
5/12/2014 Document, Report, or Work plan Review - other Review Well Decommissioning Workplan dated May 6, 2014 Peter Campbell
5/19/2014 Document, Report, or Work plan Review - other Approve well abandonment work plan in preparation for site closure with institutional controls. Peter Campbell
8/18/2014 Document, Report, or Work plan Review - other Reviewed Well Decommissioning Report dated July 21, 2014. All on site wells (12) have been removed. We are now prepared to begin site closure with institutional controls. Peter Campbell
11/23/2015 Cleanup Complete Determination Issued Cleanup Complete with Institutional Controls closure letter was issued on November 23, 2015. DRO, GRO, and benzene remained in sub-surface soil at concentrations exceeding their applicable ingestion/inhalation-based soil cleanup levels. Groundwater is brackish and not considered to be a source of drinking water. A copy of the closure letter, Notice of Environmental Contamination and site map are attached to this database as publicly accessible documents. Paul Horwath
12/1/2015 Institutional Control Record Established Institutional Controls established and entered into the database. Peter Campbell
3/16/2017 Institutional Control Compliance Review IC compliance review conducted. Staff assigned is IC Unit. Closure/IC Details updated. Reminder system set to follow-up on the three year reporting requirement in 2018. Kristin Thompson
1/9/2019 Institutional Control Update IC verification letter issued to the responsible party/landowner on this date. Mossy Mead
2/23/2023 Institutional Control Compliance Review IC compliance review conducted on this date and a reminder letter was issued. The next compliance review will be in 3 years. Jennifer McGrath

Contaminant Information

Name Level Description Media Comments
DRO > Human Health/Ingestion/Inhalation Soil
RRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
GRO > Human Health/Ingestion/Inhalation Soil
BTEX > Human Health/Ingestion/Inhalation Soil
DRO > Table C Groundwater Groundwater exceeded the Table C groundwater cleanup levels, however the groundwater is brackish and is not considered to be a viable source of drinking water.

Control Type

Type Details
Notice of Environmental Contamination Two deed notices were filed in the Aleutian Islands Recording District on 3/11/2016; Document IDs 2016-000080-0 & 2016-000081-0.
Signed CS Determination

Requirements

Description Details
Excavation / Soil Movement Restrictions Five estimated areas of known residual soil or groundwater contamination are presented on Figure 1 - Estimated Areas of Residual Soil & Groundwater Contamination. Any excavation, transport, movement, treatment, or disposal of soil or groundwater from any of these areas requires ADEC notification and approval. An environmental site assessment and soil management plan may be required. Soil movement and management may be required to be observed and monitored by a qualified environmental consultant, and also reported to ADEC by the qualified environmental consultant.
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) Standard condition.
Groundwater Use Restrictions Contaminated groundwater within the limits of this site shall not be used for drinking water, as that was the basis for establishing the applicable soil and groundwater cleanup levels.
Advance approval required to transport soil or groundwater off-site. Standard condition.
Other Landowner shall report to ADEC every three years in order to document land use, any excavation, transport, movement, treatment, or disposal of contaminated soil or groundwater, and continued compliance with ICs; or report as soon as becoming aware of any change in land ownership and/or use, if earlier.

No associated sites were found.

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