Site Report: Bayside Gas (AKA Mill Bay G&G)

Site Name:	Bayside Gas (AKA Mill Bay G&G)
Address:	3833 Rezanof Lane, Kodiak, AK 99615
File Number:	2601.26.007
Hazard ID:	23065
Status:	Active
Staff:	Dawn Wilburn, 9072628200 dawn.wilburn@alaska.gov
Latitude:	57.816852
Longitude:	-152.354738
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.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

In May of 2004 during a Release Investigation, gasoline range organics (GRO) and benzene, toluene, ethylbenzene, and xylenes (BTEX) soil and groundwater contamination was encountered downgradient of the 4,000-gallon and 2,000-gallon underground storage tanks located at the facility. Five soil borings were advanced and four were developed into groundwater monitoring wells. On September 25, 2006 approximately 90 cubic yards of contaminated soil was excavated around the existing underground storage tanks and stockpiled on site. The stockpile was removed and treated in 2011. Annual groundwater monitoring has been occurring since 2007. MW-1 was decommissioned in 2018. Soil vapor sampling was conductedin June 2021 and April 2022. All analytes were below target levels. 2022 and 2023 groundwater sampling: Benzene still exceeds cleanup levels in at least one well. In 2022 GRO, ethylbenzene, and xylenes were detected above cleanup levels in MW-2. Additional contaminants of concern (VOCs and PAHs) still need to be investigated.

Action Information

Action Date	Action	Description	DEC Staff
11/25/2003	Leaking Underground Storage Tank Release Confirmed - Petroleum	LUST Site created in CSP for source area ID 77712	Former Staff
11/25/2003	Leaking Underground Storage Tank Cleanup Initiated - Petroleum		Former Staff
11/25/2003	Site Added to Database		Former Staff
5/19/2004	Release Investigation	Release investigation conducted by TPECI for UST system. Leaking seal on turbine pump results in contaminated soil and GW.	Monica English
9/14/2004	Update or Other Action	Based on review of RI report, ADEC requests a CAP be submitted.	Monica English
12/1/2004	Update or Other Action	File number 2601.26.007 assigned and entered into the Fileroom database and Leaking Underground Storage Tank database.	Alyce Hughey
9/1/2005	Update or Other Action	Consultant submits a groundwater sampling report.	Monica English
10/21/2005	Update or Other Action	ADEC request for a Corrective Action Plan.	Monica English
12/2/2005	Update or Other Action	Consultant submits a groundwater sampling report.	Monica English
3/9/2006	Update or Other Action	ADEC Comments for the submitted CAP.	Monica English
4/27/2006	Leaking Underground Storage Tank Corrective Action Underway	Corrective Action Plan submitted.	Monica English
6/8/2006	Update or Other Action	Conditional approval issued for addressing contaminated soils portion of the CAP.	Monica English
10/9/2006	Update or Other Action	Project manager changed from Monica English to Don Seagren, per Paul Horwath.	Alyce Hughey
11/15/2006	Leaking Underground Storage Tank Corrective Action Underway	Reviewed summary report. Soil contamination exceeding clenaup levels remains under UST. Approx 90 yds3 of contaminated soil in long term stockpile awaiting evaluation of remediation options. More detail on GW remediation system to be forthcoming.	Donald Seagren
3/8/2007	Exposure Tracking Model Ranking		Former Staff
7/16/2007	Document, Report, or Work plan Review - other	Reviewed June 2007 monitoring report. 2 MWs exceed cleanup levels for GRO & Benzene. MW1 indicates benzene contamination is migrating on site from an upgradient source. Next monitoring event will be September 07.	Donald Seagren
4/23/2008	Leaking Underground Storage Tank Corrective Action Underway	Reviewed a groundwater treatment system plan prepared by Travis/Peterson Environmental Consulting, Inc., dated February 23, 2007, prepared for Petro Star, Inc., for this LUST site. Pump and treat plan with treated water to be discharged to the City Kodiak PWWT works. Sent an e-mail message to Mike Travis and inquire about the current status of the site and to ensure that there is still a desire to implement this groundwater treatment system plan. Mike Travis responded that they would like to collect another set of groundwater samples this spring and then they would make the decision as to whether or not to undertake GW cleanup measures, or revert to long-term groundwater quality monitoring.	Paul Horwath
6/13/2008	Update or Other Action	Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein.	Alyce Hughey
11/19/2008	Update or Other Action	Reviewed the May 2008 Monitoring Event Report, dated May 19, 2008, and the October 2008 Monitoring Event Report, dated October 29, 2008 from Travis/Peterson Environmental Consulting, Inc. for Paul Horwath. The down-gradient extent of the groundwater contamination has not been determined. Additional groundwater monitoring is needed in order to establish groundwater trends.	Alyce Hughey
9/8/2009	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring and Supplemental Investigations Report, dated August 11, 2009 from Travis/Peterson Environmental Consulting Inc. for Paul Horwath. Site conditions are remaining stable with the groundwater concentrations remaining about the same as previous monitoring events. MW-2, the monitoring well down-gradient of the underground storage tanks continues to detect Benzene and GRO above the groundwater cleanup levels. Long term monitoring is recommended, with the next monitoring event to be performed in October of 2009. The surface water samples taken from the drainage ditch along Rezanof Drive did not detect any hydrocarbon contamination, and the drinking water well search performed did not indicate any drinking water wells located 1,000 feet down-gradient of the site, and that all surrounding properties are serviced by the City of Kodiak Public Drinking Water.	Alyce Hughey
10/7/2010	Document, Report, or Work plan Review - other	Reviewed the August 3, 2010 Mill Bay Gas 'n' Go, former Bayside Gas Groundwater Monitoring Report, from Travis/Peterson Environmental Consulting, Inc. for Paul Horwath. The groundwater concentrations have not changed much since the beginning of the ongoing monitoring in 2007. GRO and benzene remains above the groundwater cleanup levels in monitoring well MW-2, and benzene has been detected in all the other monitoring wells above the groundwater cleanup levels other than MW-1 during the June of 2010 sampling. Continued groundwater monitoring is recommended with the next sampling to be performed in October of 2010.	Alyce Hughey
2/23/2011	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated December 16, 2010, from Travis/Peterson Environmental Consulting. During the October 14, 2010 groundwater sampling event all four of the monitoring wells detected Benzene and one monitoring well detected GRO above the groundwater cleanup levels. Semi-annual groundwater monitoring continues for further assessing of the groundwater quality at the site.	Alyce Hughey
9/21/2011	Document, Report, or Work plan Review - other	Reviewed the Contaminated Soil Stockpile Disposal Report, dated August 2011, and prepared by Travis/Peterson Environmental Consulting, Inc. The 90 cubic yards of stockpiled contaminated soil was shipped in three different trips to OIT for thermal remediation and disposal. Shipments were conducted on April 25, 2011 consisting of six truckloads of 110.64 tons of soil, May 14, 2011 consisting of six truckloads of 130.57 tons of soil and May 28, 2011 consisting of two truckloads of 47.18 tons of soil. On June 9, 2011 Alaska Resources and Environmental Services, LLC (ARES) performed a Stockpile Closure Investigation in the area of the former 90 cubic yards of stockpiled contaminated soil. Five grab (4 samples and on field duplicate) confirmation soil samples were taken from under the former stockpile area at a depth of 6 inches below ground surface and analyzed for GRO, BTEX and PAHs. All sample results were either non-detect or below the ADEC cleanup levels.	Alyce Hughey
9/22/2011	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated July 6, 2011, from Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on June 9, 2011. Benzene was detected above the groundwater cleanup levels in three of the wells sampled at concentrations of 0.0134 mg/L to 0.398 mg/L and GRO was detected above the groundwater cleanup levels at a concentration of 2.36 mg/L in one of the wells sampled. Semi-annual groundwater monitoring will continue according to the long term monitoring program, with the next sampling event taking place in October of 2011.	Alyce Hughey
12/28/2011	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated November 14, 2011, from Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on October 12, 2011. Benzene was detected above the groundwater cleanup levels in three of the wells sampled at concentrations of 0.0295 mg/L to 0.316 mg/L; with all other analytes either testing below the groundwater cleanup levels of not being detected. Semi-annual groundwater monitoring will continue according to the long term monitoring program, with the next sampling event taking place in June of 2012.	Alyce Hughey
9/24/2012	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated June 12, 2012, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on May 4, 2012. Benzene was detected above the groundwater cleanup levels in all four of the wells sampled at concentrations of 0.00513 mg/L to 0.569 mg/L. GRO was detected in monitoring well MW2 at a concentration of 3.56 mg/L. Due to the heavy snowfall during the winter of 2011-2012 the groundwater level in the monitoring wells were higher than normal. Semi-annual groundwater monitoring will continue according to the long term monitoring program, with the next sampling event taking place in October of 2012.	Alyce Hughey
12/26/2012	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated October 19, 2012, from Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on October 5, 2012. Benzene was detected above the groundwater cleanup levels in three of the monitoring wells sampled at concentrations of 0.0135 mg/L to 0.366 mg/L. Kodiak had above average rainfall during the month of September 2012 with 9.64 inches of rainfall, resulting in an increase in groundwater elevation in the site monitoring wells. Long term monitoring will continue with the next sampling event scheduled to be performed in June of 2013.	Alyce Hughey
7/19/2013	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated July 1, 2013, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on June 19, 2013. Benzene was detected above the groundwater cleanup levels in three of the monitoring wells sampled at concentrations of 0.0093 mg/L to 0.315 mg/L. Groundwater was measured in wells at depths of 3.08 to 6.83 feet from the top of well casings. Long term monitoring will continue with the next sampling event scheduled to be performed in October of 2013.	Alyce Hughey
12/19/2013	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated September 16, 2013, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on September 5, 2013. Benzene was detected above the groundwater cleanup levels in three of the monitoring wells sampled at concentrations of 0.0202 mg/L to 0.245 mg/L. Groundwater levels were higher in the wells, at depths of 2.50 to 5.50 feet from the top of well casings, with increases of 0.58 to 1.33 feet in wells.	Alyce Hughey
7/3/2014	Document, Report, or Work plan Review - other	Reviewed the Groundwater Monitoring Report, dated June 20, 2014, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on June 4, 2014, with benzene being detected above the groundwater cleanup levels in all four monitoring wells sampled at concentrations of 0.00542 mg/L to 0.0954 mg/L. Groundwater levels were found at depths of 2.80 to 6.20 feet from the top of well casings, with groundwater levels falling from September of 2013 to June of 2014 by 0.30 to 0.70 feet.	Alyce Hughey
3/12/2015	Update or Other Action	Decimal Lat/Long coordinates collected from ADEC's Internal GIS map, and entered into database. 57.816852 -152.354738	Paul Horwath
11/7/2016	Document, Report, or Work plan Review - other	Receive and review the October 2016 GW Monitoring Report, dated November 7, 2016. GW concentrations gradually declining. Travis Peterson recommends continued long-term GW monitoring.	Paul Horwath
10/5/2017	Document, Report, or Work plan Review - other	ADEC reviewed a Travis/Peterson prepared 2017 Groundwater Monitoring Report, and issued a written response expressing ADEC's concurrence with the decommissioning of GW monitoring well MW-1.	Paul Horwath
12/11/2017	Document, Report, or Work plan Review - other	Reviewed and approved a Travis/Peterson prepared work plan for the decommissioning of groundwater monitoring well MW-1. Letter issued to Petro Star, Incorporated.	Paul Horwath
7/11/2018	Document, Report, or Work plan Review - other	Reviewed the July 10, 2018 Groundwater Monitoring Report, prepared by Travis/Peterson. Benzene and xylene concentrations increasing somewhat in MW-2. Need to watch the xylene concentration in MW-2 in the 2019 groundwater sampling and analysis report.	Paul Horwath
8/30/2019	Document, Report, or Work plan Review - other	ADEC received the 2019 "Groundwater Monitoring Report" on August 9, 2019. This report details the sampling of three wells at the Mill Bay Gas 'n' Go site for gasoline range organics (GRO), benzene, toluene, ethylbenzene, and total xylenes (BTEX). Groundwater contaminants exceeding 18 AAC 75.345 Table C cleanup levels include benzene and total xylenes. ADEC provided comments on the report in a letter dated August 30, 2019.	Sammi Castle
12/11/2019	Update or Other Action	Received Response to Comments on December 2, 2019 for GW Monitoring Report comment letter sent August 30, 2019.	Jessica Hall
12/16/2019	Document, Report, or Work plan Review - other	Sent Approval Letter for Mill Bay Gas 'n' Go Groundwater Monitoring Report Response dated December 2, 2019.	Jessica Hall
12/19/2019	Update or Other Action	Reviewed file and had phone discussion with Linda Lewis (Petro Star Inc.), Mike Travis (Travis/Peterson Environmental Consulting,Inc.), and Catherine Bollinger (Petro Star Inc.) regarding path forward. They plan to submit a work plan for the 2020 field efforts and are looking at an eventual Closure with ICs.	Jessica Hall
3/19/2020	Document, Report, or Work plan Review - other	ADEC provided comments on the work plan report in a letter dated March 19, 2020.	Jessica Hall
4/20/2020	Update or Other Action	Petro Star requests that the Alaska Department of Environmental Conservation approve request to defer 2020 field work at this site to the summer of 2021.	Jessica Hall
4/23/2020	Update or Other Action	ADEC sent email to Petro Star approving request to defer 2020 field work at this site to the summer of 2021.	Jessica Hall
6/15/2020	Site Characterization Workplan Approved	2021 Work Plan Approval Letter sent to the RP, Petro Star Inc.	Jessica Hall
6/28/2021	Update or Other Action	Travis and Peterson is collecting vapor intrusion samples from the structure on site and water samples from existing monitoring wells, and also installing a new well per the work plan.	Jessica Hall
10/5/2021	Risk Assessment Report Approved	Sent RP approval letter for 2021 Groundwater Monitoring Report, dated September 29, 2021. Groundwater monitoring will continue in the summer of 2022 at the new well (MW5) along with all the other existing wells (MWX, MW2, and MW4).	Jessica Hall
4/25/2022	Meeting or Teleconference Held	Phone call with Petro Star requesting guidance on how to proceed with an abandon in place of a heating oil UST of 500 gallons. ADEC responded via email dated April 15, 2022, with guidance and requested a scope of work be submitted for the abandon in place of the tank.	Jessica Hall
5/31/2022	Document, Report, or Work plan Review - other	ADEC sent the RP comments on the “Vapor Intrusion Report”, dated May 18, 2022. ADEC requested an update report be submitted.	Jessica Hall
6/8/2022	Site Visit	Site visit with the responsible party.	Jessica Hall
9/8/2022	Document, Report, or Work plan Review - other	ADEC sent comments to Petro Star, Incorporated on see the attached comment for the “Mill Bay Gas-N-Go (ADEC: Former Bayside Gas, ADEC File #2601.26.007); 2022 Groundwater Monitoring Report”, dated August 11, 2022. ADEC requested an updated report be submitted for review.	Jessica Hall
1/13/2023	Site Characterization Report Approved	Received the revised 2022 groundwater monitoring report and vapor intrusion report on 1/13/2023 and they are now approved. Sampling was conducted at all four monitoring wells on site, concentrations of benzene were revealed above cleanup levels in three monitoring wells (MW-2, MW-4, and MW-5), and gasoline range organics (GRO), ethylbenzene, and xylenes were detected above cleanup levels in MW-2. Soil vapor sampling was conducted in June 2021 and April 2022, both revealing all analytes below ADEC target levels. Based on these data, ADEC considers the vapor intrusion pathway incomplete. ADEC is requesting a work plan for further groundwater monitoring to include additional potential contaminants of concern (volatile organic compounds/VOCs and polycyclic aromatic hydrocarbons/PAHs) that have not yet been ruled out.	Naomi Mason
7/26/2023	Site Characterization Report Approved	Sent RP approval for 2023 Groundwater Monitoring Report, dated July 6, 2023, submitted by 3-Tier Alaska. The four monitoring wells on site (MW-2, MW-X, MW-4, and MW-5) were sampled. Laboratory analytical results revealed concentrations of benzene above groundwater cleanup levels in three of the monitoring wells (MW-2, MW-4, and MW-5). ADEC is requesting further groundwater monitoring to include additional potential contaminants of concern (volatile organic compounds/VOCs and polycyclic aromatic hydrocarbons/PAHs) that have not yet been ruled out.	Dawn Wilburn

Action Date

Action

Description

DEC Staff

11/25/2003

Leaking Underground Storage Tank Release Confirmed - Petroleum

LUST Site created in CSP for source area ID 77712

Former Staff

11/25/2003

Leaking Underground Storage Tank Cleanup Initiated - Petroleum

Former Staff

11/25/2003

Site Added to Database

Former Staff

5/19/2004

Release Investigation

Release investigation conducted by TPECI for UST system. Leaking seal on turbine pump results in contaminated soil and GW.

Monica English

9/14/2004

Update or Other Action

Based on review of RI report, ADEC requests a CAP be submitted.

Monica English

12/1/2004

Update or Other Action

File number 2601.26.007 assigned and entered into the Fileroom database and Leaking Underground Storage Tank database.

Alyce Hughey

9/1/2005

Update or Other Action

Consultant submits a groundwater sampling report.

Monica English

10/21/2005

Update or Other Action

ADEC request for a Corrective Action Plan.

Monica English

12/2/2005

Update or Other Action

Consultant submits a groundwater sampling report.

Monica English

3/9/2006

Update or Other Action

ADEC Comments for the submitted CAP.

Monica English

4/27/2006

Leaking Underground Storage Tank Corrective Action Underway

Corrective Action Plan submitted.

Monica English

6/8/2006

Update or Other Action

Conditional approval issued for addressing contaminated soils portion of the CAP.

Monica English

10/9/2006

Update or Other Action

Project manager changed from Monica English to Don Seagren, per Paul Horwath.

Alyce Hughey

11/15/2006

Leaking Underground Storage Tank Corrective Action Underway

Reviewed summary report. Soil contamination exceeding clenaup levels remains under UST. Approx 90 yds3 of contaminated soil in long term stockpile awaiting evaluation of remediation options. More detail on GW remediation system to be forthcoming.

Donald Seagren

3/8/2007

Exposure Tracking Model Ranking

Former Staff

7/16/2007

Document, Report, or Work plan Review - other

Reviewed June 2007 monitoring report. 2 MWs exceed cleanup levels for GRO & Benzene. MW1 indicates benzene contamination is migrating on site from an upgradient source. Next monitoring event will be September 07.

Donald Seagren

4/23/2008

Leaking Underground Storage Tank Corrective Action Underway

Reviewed a groundwater treatment system plan prepared by Travis/Peterson Environmental Consulting, Inc., dated February 23, 2007, prepared for Petro Star, Inc., for this LUST site. Pump and treat plan with treated water to be discharged to the City Kodiak PWWT works. Sent an e-mail message to Mike Travis and inquire about the current status of the site and to ensure that there is still a desire to implement this groundwater treatment system plan. Mike Travis responded that they would like to collect another set of groundwater samples this spring and then they would make the decision as to whether or not to undertake GW cleanup measures, or revert to long-term groundwater quality monitoring.

Paul Horwath

6/13/2008

Update or Other Action

Site transferred from Don Seagren to Paul Horwath per Linda Nuechterlein.

Alyce Hughey

11/19/2008

Update or Other Action

Reviewed the May 2008 Monitoring Event Report, dated May 19, 2008, and the October 2008 Monitoring Event Report, dated October 29, 2008 from Travis/Peterson Environmental Consulting, Inc. for Paul Horwath. The down-gradient extent of the groundwater contamination has not been determined. Additional groundwater monitoring is needed in order to establish groundwater trends.

Alyce Hughey

9/8/2009

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring and Supplemental Investigations Report, dated August 11, 2009 from Travis/Peterson Environmental Consulting Inc. for Paul Horwath. Site conditions are remaining stable with the groundwater concentrations remaining about the same as previous monitoring events. MW-2, the monitoring well down-gradient of the underground storage tanks continues to detect Benzene and GRO above the groundwater cleanup levels. Long term monitoring is recommended, with the next monitoring event to be performed in October of 2009. The surface water samples taken from the drainage ditch along Rezanof Drive did not detect any hydrocarbon contamination, and the drinking water well search performed did not indicate any drinking water wells located 1,000 feet down-gradient of the site, and that all surrounding properties are serviced by the City of Kodiak Public Drinking Water.

Alyce Hughey

10/7/2010

Document, Report, or Work plan Review - other

Reviewed the August 3, 2010 Mill Bay Gas 'n' Go, former Bayside Gas Groundwater Monitoring Report, from Travis/Peterson Environmental Consulting, Inc. for Paul Horwath. The groundwater concentrations have not changed much since the beginning of the ongoing monitoring in 2007. GRO and benzene remains above the groundwater cleanup levels in monitoring well MW-2, and benzene has been detected in all the other monitoring wells above the groundwater cleanup levels other than MW-1 during the June of 2010 sampling. Continued groundwater monitoring is recommended with the next sampling to be performed in October of 2010.

Alyce Hughey

2/23/2011

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated December 16, 2010, from Travis/Peterson Environmental Consulting. During the October 14, 2010 groundwater sampling event all four of the monitoring wells detected Benzene and one monitoring well detected GRO above the groundwater cleanup levels. Semi-annual groundwater monitoring continues for further assessing of the groundwater quality at the site.

Alyce Hughey

9/21/2011

Document, Report, or Work plan Review - other

Reviewed the Contaminated Soil Stockpile Disposal Report, dated August 2011, and prepared by Travis/Peterson Environmental Consulting, Inc. The 90 cubic yards of stockpiled contaminated soil was shipped in three different trips to OIT for thermal remediation and disposal. Shipments were conducted on April 25, 2011 consisting of six truckloads of 110.64 tons of soil, May 14, 2011 consisting of six truckloads of 130.57 tons of soil and May 28, 2011 consisting of two truckloads of 47.18 tons of soil. On June 9, 2011 Alaska Resources and Environmental Services, LLC (ARES) performed a Stockpile Closure Investigation in the area of the former 90 cubic yards of stockpiled contaminated soil. Five grab (4 samples and on field duplicate) confirmation soil samples were taken from under the former stockpile area at a depth of 6 inches below ground surface and analyzed for GRO, BTEX and PAHs. All sample results were either non-detect or below the ADEC cleanup levels.

Alyce Hughey

9/22/2011

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated July 6, 2011, from Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on June 9, 2011. Benzene was detected above the groundwater cleanup levels in three of the wells sampled at concentrations of 0.0134 mg/L to 0.398 mg/L and GRO was detected above the groundwater cleanup levels at a concentration of 2.36 mg/L in one of the wells sampled. Semi-annual groundwater monitoring will continue according to the long term monitoring program, with the next sampling event taking place in October of 2011.

Alyce Hughey

12/28/2011

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated November 14, 2011, from Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on October 12, 2011. Benzene was detected above the groundwater cleanup levels in three of the wells sampled at concentrations of 0.0295 mg/L to 0.316 mg/L; with all other analytes either testing below the groundwater cleanup levels of not being detected. Semi-annual groundwater monitoring will continue according to the long term monitoring program, with the next sampling event taking place in June of 2012.

Alyce Hughey

9/24/2012

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated June 12, 2012, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on May 4, 2012. Benzene was detected above the groundwater cleanup levels in all four of the wells sampled at concentrations of 0.00513 mg/L to 0.569 mg/L. GRO was detected in monitoring well MW2 at a concentration of 3.56 mg/L. Due to the heavy snowfall during the winter of 2011-2012 the groundwater level in the monitoring wells were higher than normal. Semi-annual groundwater monitoring will continue according to the long term monitoring program, with the next sampling event taking place in October of 2012.

Alyce Hughey

12/26/2012

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated October 19, 2012, from Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on October 5, 2012. Benzene was detected above the groundwater cleanup levels in three of the monitoring wells sampled at concentrations of 0.0135 mg/L to 0.366 mg/L. Kodiak had above average rainfall during the month of September 2012 with 9.64 inches of rainfall, resulting in an increase in groundwater elevation in the site monitoring wells. Long term monitoring will continue with the next sampling event scheduled to be performed in June of 2013.

Alyce Hughey

7/19/2013

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated July 1, 2013, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on June 19, 2013. Benzene was detected above the groundwater cleanup levels in three of the monitoring wells sampled at concentrations of 0.0093 mg/L to 0.315 mg/L. Groundwater was measured in wells at depths of 3.08 to 6.83 feet from the top of well casings. Long term monitoring will continue with the next sampling event scheduled to be performed in October of 2013.

Alyce Hughey

12/19/2013

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated September 16, 2013, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on September 5, 2013. Benzene was detected above the groundwater cleanup levels in three of the monitoring wells sampled at concentrations of 0.0202 mg/L to 0.245 mg/L. Groundwater levels were higher in the wells, at depths of 2.50 to 5.50 feet from the top of well casings, with increases of 0.58 to 1.33 feet in wells.

Alyce Hughey

7/3/2014

Document, Report, or Work plan Review - other

Reviewed the Groundwater Monitoring Report, dated June 20, 2014, prepared by Travis/Peterson Environmental Consulting, Inc. The four on-site monitoring wells were sampled on June 4, 2014, with benzene being detected above the groundwater cleanup levels in all four monitoring wells sampled at concentrations of 0.00542 mg/L to 0.0954 mg/L. Groundwater levels were found at depths of 2.80 to 6.20 feet from the top of well casings, with groundwater levels falling from September of 2013 to June of 2014 by 0.30 to 0.70 feet.

Alyce Hughey

3/12/2015

Update or Other Action

Decimal Lat/Long coordinates collected from ADEC's Internal GIS map, and entered into database. 57.816852 -152.354738

Paul Horwath

11/7/2016

Document, Report, or Work plan Review - other

Receive and review the October 2016 GW Monitoring Report, dated November 7, 2016. GW concentrations gradually declining. Travis Peterson recommends continued long-term GW monitoring.

Paul Horwath

10/5/2017

Document, Report, or Work plan Review - other

ADEC reviewed a Travis/Peterson prepared 2017 Groundwater Monitoring Report, and issued a written response expressing ADEC's concurrence with the decommissioning of GW monitoring well MW-1.

Paul Horwath

12/11/2017

Document, Report, or Work plan Review - other

Reviewed and approved a Travis/Peterson prepared work plan for the decommissioning of groundwater monitoring well MW-1. Letter issued to Petro Star, Incorporated.

Paul Horwath

7/11/2018

Document, Report, or Work plan Review - other

Reviewed the July 10, 2018 Groundwater Monitoring Report, prepared by Travis/Peterson. Benzene and xylene concentrations increasing somewhat in MW-2. Need to watch the xylene concentration in MW-2 in the 2019 groundwater sampling and analysis report.

Paul Horwath

8/30/2019

Document, Report, or Work plan Review - other

ADEC received the 2019 "Groundwater Monitoring Report" on August 9, 2019. This report details the sampling of three wells at the Mill Bay Gas 'n' Go site for gasoline range organics (GRO), benzene, toluene, ethylbenzene, and total xylenes (BTEX). Groundwater contaminants exceeding 18 AAC 75.345 Table C cleanup levels include benzene and total xylenes. ADEC provided comments on the report in a letter dated August 30, 2019.

Sammi Castle

12/11/2019

Update or Other Action

Received Response to Comments on December 2, 2019 for GW Monitoring Report comment letter sent August 30, 2019.

Jessica Hall

12/16/2019

Document, Report, or Work plan Review - other

Sent Approval Letter for Mill Bay Gas 'n' Go Groundwater Monitoring Report Response dated December 2, 2019.

Jessica Hall

12/19/2019

Update or Other Action

Reviewed file and had phone discussion with Linda Lewis (Petro Star Inc.), Mike Travis (Travis/Peterson Environmental Consulting,Inc.), and Catherine Bollinger (Petro Star Inc.) regarding path forward. They plan to submit a work plan for the 2020 field efforts and are looking at an eventual Closure with ICs.

Jessica Hall

3/19/2020

Document, Report, or Work plan Review - other

ADEC provided comments on the work plan report in a letter dated March 19, 2020.

Jessica Hall

4/20/2020

Update or Other Action

Petro Star requests that the Alaska Department of Environmental Conservation approve request to defer 2020 field work at this site to the summer of 2021.

Jessica Hall

4/23/2020

Update or Other Action

ADEC sent email to Petro Star approving request to defer 2020 field work at this site to the summer of 2021.

Jessica Hall

6/15/2020

Site Characterization Workplan Approved

2021 Work Plan Approval Letter sent to the RP, Petro Star Inc.

Jessica Hall

6/28/2021

Update or Other Action

Travis and Peterson is collecting vapor intrusion samples from the structure on site and water samples from existing monitoring wells, and also installing a new well per the work plan.

Jessica Hall

10/5/2021

Risk Assessment Report Approved

Sent RP approval letter for 2021 Groundwater Monitoring Report, dated September 29, 2021. Groundwater monitoring will continue in the summer of 2022 at the new well (MW5) along with all the other existing wells (MWX, MW2, and MW4).

Jessica Hall

4/25/2022

Meeting or Teleconference Held

Phone call with Petro Star requesting guidance on how to proceed with an abandon in place of a heating oil UST of 500 gallons. ADEC responded via email dated April 15, 2022, with guidance and requested a scope of work be submitted for the abandon in place of the tank.

Jessica Hall

5/31/2022

Document, Report, or Work plan Review - other

ADEC sent the RP comments on the “Vapor Intrusion Report”, dated May 18, 2022. ADEC requested an update report be submitted.

Jessica Hall

6/8/2022

Site Visit

Site visit with the responsible party.

Jessica Hall

9/8/2022

Document, Report, or Work plan Review - other

ADEC sent comments to Petro Star, Incorporated on see the attached comment for the “Mill Bay Gas-N-Go (ADEC: Former Bayside Gas, ADEC File #2601.26.007); 2022 Groundwater Monitoring Report”, dated August 11, 2022. ADEC requested an updated report be submitted for review.

Jessica Hall

1/13/2023

Site Characterization Report Approved

Received the revised 2022 groundwater monitoring report and vapor intrusion report on 1/13/2023 and they are now approved. Sampling was conducted at all four monitoring wells on site, concentrations of benzene were revealed above cleanup levels in three monitoring wells (MW-2, MW-4, and MW-5), and gasoline range organics (GRO), ethylbenzene, and xylenes were detected above cleanup levels in MW-2. Soil vapor sampling was conducted in June 2021 and April 2022, both revealing all analytes below ADEC target levels. Based on these data, ADEC considers the vapor intrusion pathway incomplete. ADEC is requesting a work plan for further groundwater monitoring to include additional potential contaminants of concern (volatile organic compounds/VOCs and polycyclic aromatic hydrocarbons/PAHs) that have not yet been ruled out.

Naomi Mason

7/26/2023

Site Characterization Report Approved

Sent RP approval for 2023 Groundwater Monitoring Report, dated July 6, 2023, submitted by 3-Tier Alaska. The four monitoring wells on site (MW-2, MW-X, MW-4, and MW-5) were sampled. Laboratory analytical results revealed concentrations of benzene above groundwater cleanup levels in three of the monitoring wells (MW-2, MW-4, and MW-5). ADEC is requesting further groundwater monitoring to include additional potential contaminants of concern (volatile organic compounds/VOCs and polycyclic aromatic hydrocarbons/PAHs) that have not yet been ruled out.

Dawn Wilburn

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Site Report: Bayside Gas (AKA Mill Bay G&G)

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State of Alaska Department of Environmental Conservation