Site Report: Craig Power Plant

Site Name:	Craig Power Plant
Address:	Water Street North of 6th, Craig, AK 99921
File Number:	1504.38.009
Hazard ID:	2385
Status:	Active
Staff:	Stacee Henderson, 9072628202 stacee.henderson@alaska.gov
Latitude:	55.477100
Longitude:	-133.148500
Horizontal Datum:	NAD83

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

Petroleum contamination from a 900-gallon release from a floor mounted day tank and chronic spills/overfills from a 10,000-gallon aboveground storage tank (AST). In a 1994 Phase II Environmental Site Assessment (by Hart Crowser for AP&T), samples of stained soil at the 10,000-gallon AST had 2,400 milligrams per kilogram (mg/kg) (PL-1 @ 1-foot BGS) and 21,000 mg/kg (PL-2 @ 1-foot BGS) DRO. Samples from two test pits located on the north side of the power plant had 12,000 mg/kg (C-2 @ 2-feet BGS) and 17,000 mg/kg (C-3 @ 7-feet BGS) DRO. A sample from a test pit on the adjacent property to the north had 21,000 mg/kg (C-5 @ 6-feet BGS) DRO. Results for samples in the remaining test pits (C-1, C-4, C-6, and C-7) were either below laboratory reporting limits or below cleanup levels. The 1995 Release Investigation (RA) advanced 13 soil borings to collect soil samples and installed and sampled four groundwater monitoring wells. DRO was detected in soils at concentrations between 39 and 9,300 milligrams per kilogram (mg/kg), and a maximum DRO concentration of 37 milligrams per liter (mg/L). Three of the four wells had noticeable petroleum sheen. In February 1997, DEC sent a letter to AP&T approving a Corrective Action Plan (CAP) to conduct ex-situ biocell treatment of an estimated volume of 1,300 cubic yards of soil excavated from the AP&T property and the adjacent Clapp property. Also approved in the CAP was in-situ combination bioventing/air sparging treatment of residual subsurface soil and groundwater petroleum contamination. DEC requested that Hart Crowser submit an implementation schedule for the approved Plan. In March 2002, DEC sent a letter to AP&T stating that on February 27, 1997, a letter from Attorney Anne DeVoe Lawler was sent to AP&T and DEC. The letter stated that anything less than final remediation was unacceptable to Ms. Lawler's client, A. Underson Limited Partnership, the record owner of the adjacent Clapp property. In 2005, the AP&T plant manager Greg Mickelson reported to DEC that site work was suspended until a property dispute with the resident of the adjacent beach property was resolved. AP&T presumed that when the beach house was vacated it could then be dismantled or moved and the site cleanup could be implemented. DEC concluded that the delay would be acceptable.

Action Information

Action Date	Action	Description	DEC Staff
8/10/1993	Update or Other Action	(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)).	Randy Rice
10/5/1994	Update or Other Action	(Old R:Base Action Code = SA2R - Phase II SA Review (CS)).	Randy Rice
5/31/1995	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Approval to bioremediate soil at Klawock Landfill.	Randy Rice
8/14/1995	Update or Other Action	Release Investigation Report received.	Randy Rice
10/4/1995	Update or Other Action	(Old R:Base Action Code = RARR - Remedial Action Report Review (CS)).	Bill Janes
10/7/1995	Site Added to Database	Petroleum contamination.	Randy Rice
10/20/1995	Site Ranked Using the AHRM	Initial ranking.	Bill Janes
4/16/1996	Site Visit	Site visit. Monitoring wells installed down gradient of facility. Large AST diaper tank precariously mounted on property next large wall, geophysical concern. Good hazardous waste practices in place at facility, knowledgeable operator. Adjacent residential property is very close to the generator facility.	Sally Schlichting
8/26/1996	Potentially Responsible Party/State Interest Letter	Site Characterization Workplan reviewed and comments sent to Alaska Power & Telephone (AP&T) by letter. In accordance with Alaska Statutes 46. 03.760(h), AS 46.03.822 and AS 46.08.070, DEC provided AP&T with Notice of Environmental Contamination and Potential Responsible Party notification in the letter.	Bill Janes
1/8/1997	Update or Other Action	Final corrective action workplan dated 11/14/96 received from AP&T	Bill Janes
2/5/1997	Cleanup Plan Approved	(Old R:Base Action Code = RAPA - Remedial Action Plan Approval).	Bill Janes
2/6/1997	Site Characterization Workplan Approved	Site Characterization Workplan Approved this date.	Bill Janes
10/7/1999	Update or Other Action	This site has been inactive for the past 2.5 years. The corrective action plan may never have been implemented due to a dispute with the adjacent property owner. Need to follow up with Alaska Power and Telephone as time allows.	Bill Janes
3/18/2002	Update or Other Action	Site tickler update - Letter sent to Alaska Power and Telephone to re-engage them in project. See G:\SPAR\Spar-Contaminated Sites\SITES\Craig Power Plant\AP&T let.doc.	Bill Janes
8/21/2002	Update or Other Action	Telecon with Don Mahon, VP of Power Ops. Actions: 1. AP&T will contact MR. Clapp to determine if a property transfer is possible. 2. I will concurrently review the Hart Crowser report in terms of our updated regulations and look at applicable cleanup levels. 3. Report back on 9/20/02	Bill Janes
10/17/2002	Update or Other Action	Reviewed file and concluded that the cleanup levels set several years ago are conservative and need re-visting. Emailed Don Mahon that he should re-instate Hart Crower and get in touch with me. Email is in Outlook site file.	Bill Janes
11/22/2002	Update or Other Action	Heard from Don Mahon. They still have not done much but he is planning to talk to his boss and then write back.	Bill Janes
6/3/2005	Update or Other Action	Telecon with Greg Mickelson, plant manager. The house on the downgradient property is an old float home that was dragged onto the property about 40 years ago. An elderly woman occupies the house at this time so the property owner does not want to take any action until this encroachment issue is resolved. The house will likely be torn down when the occupant leaves, at which time the cleanup project will be reactivated. Remaining contamination appears stable and is below human health based levels.	Bill Janes
5/25/2007	Site Visit	DEC performed a safe view site visit to the residence and the fence separating it from the property. Since no one was home DEC left contact information. The resident later telephoned DEC and stated they no complaints about the environmental conditions at the site.	Bruce Wanstall
12/21/2007	Update or Other Action	The Alaska Department of Law received on behalf of DEC a check for $1,175.19 from Alaska Power & Telephone Company for cost recovery of expenses responding the oil and hazardous substance release at the Craig Power Plant case, LC 1489360.	Bruce Wanstall
2/26/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Bill Janes
4/14/2014	Potentially Responsible Party/State Interest Letter	DEC prepared and sent the new landowner Shaan Seet Inc a PRP letter with a brief summary of historical site activity by the former owner and responsible party Alaska Power & Telephone.	Bruce Wanstall
1/6/2017	Update or Other Action	DEC sent a letter to AP&T requesting a remedial action plan be submitted for approval.	Bruce Wanstall
1/6/2017	Exposure Tracking Model Ranking	A new updated ranking with ETM has been completed for source area 73363 AST.	Bruce Wanstall
6/18/2018	Workplan Requested	Sent certified request for a work plan this date. 7017 2400 0000 6055 1992	Danielle Duncan
6/27/2018	Meeting or Teleconference Held	Meeting with G. Martin (AP&T) to discuss an upcoming work plan.	Danielle Duncan
7/2/2018	Update or Other Action	Spoke to the responsible party: They have asked the potential contractors for proposals to conduct the reassessment by July 13 to give them a little more time considering the information you shared and because of the holiday week. They hope to have chosen a contractor by the end of the following week and then submit a reassessment plan to you by the end of August, if not sooner. The reassessment may then be able to take place by October of this year. After I review the results of the reassessment they will contract, probably with the same firm, to develop a remediation plan to submit to DEC either by the end of the year or shortly thereafter and hopefully plan for remediation during the summer of 2019.	Danielle Duncan
7/23/2018	Update or Other Action	Shaan Seet, the landowner toward the bay from our Craig power plant, has indicated they see no problem allowing us to conduct sampling on their property.	Danielle Duncan
11/6/2018	Site Characterization Workplan Approved	Approved the Site Characterization Work Plan this date. For the site characterization, 16 test pits are proposed. Many of these are in the same locations documented in the Hart Crowser Release Investigation dated August 1995. In addition, the four existing groundwater monitoring wells will be sampled.	Danielle Duncan
3/18/2019	Document, Report, or Work plan Review - other	Provided comments on the Draft Site Characterization Report this date.	Danielle Duncan
5/21/2019	Site Characterization Report Approved	Approved the Site Characterization Report for the Craig Power Plant, dated January 2019. The report documents the results of soil and groundwater sampling. Sixteen test pits were advanced on the property. Eleven had petroleum contamination above ADEC cleanup levels. The majority of these were located on the north side of the power house building extending to the high tide line. The four historic groundwater monitoring wells (WS1, WS2, WS4, and WS5) were sampled and analyzed for DRO and RRO. WS1 and WS2 were additionally be analyzed for BTEX, PAHs, and VOCs. The results found all four wells to have DRO concentrations above ADEC cleanup levels ranging from 7.2 to 200 milligrams per liter (mg/L). These DRO concentrations are indicative of petroleum product in the groundwater.	Danielle Duncan
8/22/2019	Update or Other Action	Groundwater on site is under the influence of marine water as evidenced by the proximity to marine water, historic salinity measurements, and groundwater level changes during tides, therefore, human health soil cleanup levels have been approved. Any petroleum product in the groundwater must be recovered and groundwater must meet ADEC Surface Water Quality standards.	Danielle Duncan
4/21/2020	Document, Report, or Work plan Review - other	On April 21, 2020 ADEC received a "DRAFT Supplemental Site Characterization Work Plan Craig Power Plant" dated April 2020.	Rachael Petraeus
5/7/2020	Update or Other Action	ADEC received “Draft Supplemental Site Characterization Work Plan Craig Power Plant” dated February 19, 2020 on April 13, 2020 via email. ADEC has reviewed the draft work plan and provided comments. The plan summarizes a limited scope of work to verify groundwater concentrations in new installed monitoring wells and determination of concentrations of the contaminants of concern: volatile organic compounds and polycyclic aromatic hydrocarbons.	Rachael Petraeus
11/15/2021	Document, Report, or Work plan Review - other	On November 15, 2021 ADEC received "Groundwater Monitoring Report – September 2021" dated November 12, 2021. The report summarizes the results of a groundwater monitoring event.	Rachael Petraeus
7/18/2022	Document, Report, or Work plan Review - other	The ADEC provided a response letter to the "Draft 2021 Groundwater Monitoring - September 2021- Rev 2" report. A final report should be submitted for approval.	Flannery Ballard
7/25/2022	Document, Report, or Work plan Review - other	THE ADEC provided comments re "2022 DRAFT Groundwater Monitoring Work Plan - Craig Power Plant". the comments request additional clarifying information regarding sampling methodologies and past environmental work that has been conducted at the Shaan Seet property.	Flannery Ballard
8/3/2022	Meeting or Teleconference Held	The ADEC attended a teleconference with RP and consultant to discuss current site status, appropriate cleanup levels for the site, the applicability of a 350 determination, current data gaps, and the closure process.	Flannery Ballard
8/11/2022	Site Characterization Report Approved	The ADEC approved the "Draft Groundwater Monitoring Report - September 2021- Rev 3", which summarized groundwater sampling events that occurred at the site on September 30, 2021. Groundwater was collected from all five monitoring wells and analyzed for GRO, DRO, RRO, BTEX, and PAHs. A hydrocarbon odor and a sheen were noted on purge water from MW-1. Analytical results demonstrated no detection of any analytes in MW-5. DRO was detected in all other MWs, with a maximum concentration of 5, 000 ug/L in MW-1, exceeding the cleanup level of 1,500 ug/L. RRO was present in MW-1 and -4, with a maximum concentration of 1,400 ug/L, below the cleanup level of 1,00 ug/L. BTEX contaminants were not detected in any MWs above their respective reporting limits. The following PAHs were detected at concentrations below cleanup levels: 1-methylnaphthalene, acenaphthene, fluorene, phenanthrene, and pyrene. The report will be uploaded when a final PDF version is submitted to the department.	Flannery Ballard
8/11/2022	Site Characterization Workplan Approved	The ADEC approved the "2022 Groundwater Monitoring Work Plan - Craig Power Plant" dated August 4, 2022. The WP proposes another round of groundwater sampling to take place September 2022 to assess groundwater conditions at the site and to attain additional groundwater data to evaluate contamination trends over time. Groundwater samples will be collected from all five monitoring wells and will be analysed for DRO, DRO, VOCs, PAHs and chloride. Chloride will be sampled for as an indicator of salinity in the monitoring wells. Additionally, two temporary monitoring wells will be installed along the tideline in an attempt to sample the groundwater seep at low tide to assess whether surface water has been impacted by petroleum contamination. This investigation will also perform a "Building Survey and Indoor Air-Sampling Questionnaire" for the Shaan Seet property. Photos of this property will be included in the report.	Flannery Ballard
12/8/2022	Meeting or Teleconference Held	The ADEC met with APT, Shaan Seet, and RMI to discuss a failing retaining wall located to the west of the power plant, between the APT and Shaan Seet hotel. Work on the retaining wall will be done in the footprint of a DRO plume, beneath the former 10,000 gallon aboveground fuel tank. The ADEC requested a work plan for work on the retaining wall, and suggested that soil samples be taken during the retaining wall work to aid site characterization of the DRO plume.	Flannery Ballard
1/10/2023	Site Characterization Report Approved	The ADEC approved the "2022 Groundwater Monitoring Report". This report summarized the September 2022 groundwater monitoring event in which groundwater was sampled from MWs 1-5, and from two locations on the beach using temporary monitoring wells. DRO was detected up to a maximum of 3,600 ug/L, exceeding in MW1 and MW4. RRO was detected in MW1 and MW4, but was below cleanup levels. Total Aromatic Hydrocarbons (TAHs) and Total Aqueous Hydrocarbons (TAqH) were below Water Quality Standards. The ADEC concurs with the conclusions of the report that another round of groundwater sampling should be undertaken. Report is uploaded.	Flannery Ballard
2/22/2023	Document, Report, or Work plan Review - other	In response to a request from RP, the DEC is reviewing the 2018 approved WP to see if it is applicable for 2023 planned soil sampling and retaining wall repair work. The DEC is asking for additional detail to be added to the WP or an addendum be submitted for approval.	Flannery Ballard
3/23/2023	Site Characterization Workplan Approved	The ADEC approved a Groundwater Monitoring report this date. All monitoring wells will be sampled and analyzed for DRO, RRO, VOCs, and PAHs. Chloride will also be analysed for. All purge water will be kept onside in a 55-gallon drum.	Flannery Ballard
5/9/2023	Site Characterization Workplan Approved	The DEC approved a work plan amendment to the 2018 approved work plan. The amendment proposes to excavate two test pits 1) in the vicinity of the 10,000-gallon old fuel storage tank and 2) by the cooling tower structure. Test pits will be excavated until the water table, soils will be field screened and soil samples will be collected to be analyzed for GRO, DRO, RRO, and a subset for VOCs, PAHs, PCBs, and TCLP.	Flannery Ballard
11/16/2023	Document, Report, or Work plan Review - other	A sampling report was reviewed and comments sent. The report detailed excavating two test pits, one near the 10,000 gallon AST (Site 1) and the other near the cooling tower (Site 2). The Site 1 test pit was excavated down to 6 feet, but no further because of sloughing. Two sample were collected and analyzed for DRO, RRO, GRO, PAH, and VOC. Both samples collected (2-4' and 4-6') exceeded migration to groundwater cleanup levels for DRO. No groundwater was reported in the Site 1 test pit. Site 2 test pit was excavated to 6 feet to the groundwater interface. Two sample were collected and analyzed for DRO, RRO, GRO, PAH, and VOC. Both samples collected (2-4' and 4-6') exceeded migration to groundwater cleanup levels for DRO. One sample was also analyzed for PCB and TCLP metals. There were no cleanup level exceedances for those parameters.	Lisa Krebs-Barsis
11/16/2023	Document, Report, or Work plan Review - other	The groundwater monitoring report was reviewed and comments were sent. Water sampling was planned for the five wells installed in 2020. MW3 was found to be destroyed. MW1 was not sampled because free product was observed in the well. Samples were collected from MW2, MW4, and MW5 and analyzed for DRO, RRO, BTEX, and PAH. There were no exceedance of cleanup levels, however the groundwater in MW2 was above the screened interval.	Lisa Krebs-Barsis

Action Date

Action

Description

DEC Staff

8/10/1993

Update or Other Action

(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)).

Randy Rice

10/5/1994

Update or Other Action

(Old R:Base Action Code = SA2R - Phase II SA Review (CS)).

Randy Rice

5/31/1995

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Approval to bioremediate soil at Klawock Landfill.

Randy Rice

8/14/1995

Update or Other Action

Release Investigation Report received.

Randy Rice

10/4/1995

Update or Other Action

(Old R:Base Action Code = RARR - Remedial Action Report Review (CS)).

Bill Janes

10/7/1995

Site Added to Database

Petroleum contamination.

Randy Rice

10/20/1995

Site Ranked Using the AHRM

Initial ranking.

Bill Janes

4/16/1996

Site Visit

Site visit. Monitoring wells installed down gradient of facility. Large AST diaper tank precariously mounted on property next large wall, geophysical concern. Good hazardous waste practices in place at facility, knowledgeable operator. Adjacent residential property is very close to the generator facility.

Sally Schlichting

8/26/1996

Potentially Responsible Party/State Interest Letter

Site Characterization Workplan reviewed and comments sent to Alaska Power & Telephone (AP&T) by letter. In accordance with Alaska Statutes 46. 03.760(h), AS 46.03.822 and AS 46.08.070, DEC provided AP&T with Notice of Environmental Contamination and Potential Responsible Party notification in the letter.

Bill Janes

1/8/1997

Update or Other Action

Final corrective action workplan dated 11/14/96 received from AP&T

Bill Janes

2/5/1997

Cleanup Plan Approved

(Old R:Base Action Code = RAPA - Remedial Action Plan Approval).

Bill Janes

2/6/1997

Site Characterization Workplan Approved

Site Characterization Workplan Approved this date.

Bill Janes

10/7/1999

Update or Other Action

This site has been inactive for the past 2.5 years. The corrective action plan may never have been implemented due to a dispute with the adjacent property owner. Need to follow up with Alaska Power and Telephone as time allows.

Bill Janes

3/18/2002

Update or Other Action

Site tickler update - Letter sent to Alaska Power and Telephone to re-engage them in project. See G:\SPAR\Spar-Contaminated Sites\SITES\Craig Power Plant\AP&T let.doc.

Bill Janes

8/21/2002

Update or Other Action

Telecon with Don Mahon, VP of Power Ops. Actions: 1. AP&T will contact MR. Clapp to determine if a property transfer is possible. 2. I will concurrently review the Hart Crowser report in terms of our updated regulations and look at applicable cleanup levels. 3. Report back on 9/20/02

Bill Janes

10/17/2002

Update or Other Action

Reviewed file and concluded that the cleanup levels set several years ago are conservative and need re-visting. Emailed Don Mahon that he should re-instate Hart Crower and get in touch with me. Email is in Outlook site file.

Bill Janes

11/22/2002

Update or Other Action

Heard from Don Mahon. They still have not done much but he is planning to talk to his boss and then write back.

Bill Janes

6/3/2005

Update or Other Action

Telecon with Greg Mickelson, plant manager. The house on the downgradient property is an old float home that was dragged onto the property about 40 years ago. An elderly woman occupies the house at this time so the property owner does not want to take any action until this encroachment issue is resolved. The house will likely be torn down when the occupant leaves, at which time the cleanup project will be reactivated. Remaining contamination appears stable and is below human health based levels.

Bill Janes

5/25/2007

Site Visit

DEC performed a safe view site visit to the residence and the fence separating it from the property. Since no one was home DEC left contact information. The resident later telephoned DEC and stated they no complaints about the environmental conditions at the site.

Bruce Wanstall

12/21/2007

Update or Other Action

The Alaska Department of Law received on behalf of DEC a check for $1,175.19 from Alaska Power & Telephone Company for cost recovery of expenses responding the oil and hazardous substance release at the Craig Power Plant case, LC 1489360.

Bruce Wanstall

2/26/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Bill Janes

4/14/2014

Potentially Responsible Party/State Interest Letter

DEC prepared and sent the new landowner Shaan Seet Inc a PRP letter with a brief summary of historical site activity by the former owner and responsible party Alaska Power & Telephone.

Bruce Wanstall

1/6/2017

Update or Other Action

DEC sent a letter to AP&T requesting a remedial action plan be submitted for approval.

Bruce Wanstall

1/6/2017

Exposure Tracking Model Ranking

A new updated ranking with ETM has been completed for source area 73363 AST.

Bruce Wanstall

6/18/2018

Workplan Requested

Sent certified request for a work plan this date. 7017 2400 0000 6055 1992

Danielle Duncan

6/27/2018

Meeting or Teleconference Held

Meeting with G. Martin (AP&T) to discuss an upcoming work plan.

Danielle Duncan

7/2/2018

Update or Other Action

Spoke to the responsible party: They have asked the potential contractors for proposals to conduct the reassessment by July 13 to give them a little more time considering the information you shared and because of the holiday week. They hope to have chosen a contractor by the end of the following week and then submit a reassessment plan to you by the end of August, if not sooner. The reassessment may then be able to take place by October of this year. After I review the results of the reassessment they will contract, probably with the same firm, to develop a remediation plan to submit to DEC either by the end of the year or shortly thereafter and hopefully plan for remediation during the summer of 2019.

Danielle Duncan

7/23/2018

Update or Other Action

Shaan Seet, the landowner toward the bay from our Craig power plant, has indicated they see no problem allowing us to conduct sampling on their property.

Danielle Duncan

11/6/2018

Site Characterization Workplan Approved

Approved the Site Characterization Work Plan this date. For the site characterization, 16 test pits are proposed. Many of these are in the same locations documented in the Hart Crowser Release Investigation dated August 1995. In addition, the four existing groundwater monitoring wells will be sampled.

Danielle Duncan

3/18/2019

Document, Report, or Work plan Review - other

Provided comments on the Draft Site Characterization Report this date.

Danielle Duncan

5/21/2019

Site Characterization Report Approved

Approved the Site Characterization Report for the Craig Power Plant, dated January 2019. The report documents the results of soil and groundwater sampling. Sixteen test pits were advanced on the property. Eleven had petroleum contamination above ADEC cleanup levels. The majority of these were located on the north side of the power house building extending to the high tide line. The four historic groundwater monitoring wells (WS1, WS2, WS4, and WS5) were sampled and analyzed for DRO and RRO. WS1 and WS2 were additionally be analyzed for BTEX, PAHs, and VOCs. The results found all four wells to have DRO concentrations above ADEC cleanup levels ranging from 7.2 to 200 milligrams per liter (mg/L). These DRO concentrations are indicative of petroleum product in the groundwater.

Danielle Duncan

8/22/2019

Update or Other Action

Groundwater on site is under the influence of marine water as evidenced by the proximity to marine water, historic salinity measurements, and groundwater level changes during tides, therefore, human health soil cleanup levels have been approved. Any petroleum product in the groundwater must be recovered and groundwater must meet ADEC Surface Water Quality standards.

Danielle Duncan

4/21/2020

Document, Report, or Work plan Review - other

On April 21, 2020 ADEC received a "DRAFT Supplemental Site Characterization Work Plan Craig Power Plant" dated April 2020.

Rachael Petraeus

5/7/2020

Update or Other Action

ADEC received “Draft Supplemental Site Characterization Work Plan Craig Power Plant” dated February 19, 2020 on April 13, 2020 via email. ADEC has reviewed the draft work plan and provided comments. The plan summarizes a limited scope of work to verify groundwater concentrations in new installed monitoring wells and determination of concentrations of the contaminants of concern: volatile organic compounds and polycyclic aromatic hydrocarbons.

Rachael Petraeus

11/15/2021

Document, Report, or Work plan Review - other

On November 15, 2021 ADEC received "Groundwater Monitoring Report – September 2021" dated November 12, 2021. The report summarizes the results of a groundwater monitoring event.

Rachael Petraeus

7/18/2022

Document, Report, or Work plan Review - other

The ADEC provided a response letter to the "Draft 2021 Groundwater Monitoring - September 2021- Rev 2" report. A final report should be submitted for approval.

Flannery Ballard

7/25/2022

Document, Report, or Work plan Review - other

THE ADEC provided comments re "2022 DRAFT Groundwater Monitoring Work Plan - Craig Power Plant". the comments request additional clarifying information regarding sampling methodologies and past environmental work that has been conducted at the Shaan Seet property.

Flannery Ballard

8/3/2022

Meeting or Teleconference Held

The ADEC attended a teleconference with RP and consultant to discuss current site status, appropriate cleanup levels for the site, the applicability of a 350 determination, current data gaps, and the closure process.

Flannery Ballard

8/11/2022

Site Characterization Report Approved

The ADEC approved the "Draft Groundwater Monitoring Report - September 2021- Rev 3", which summarized groundwater sampling events that occurred at the site on September 30, 2021. Groundwater was collected from all five monitoring wells and analyzed for GRO, DRO, RRO, BTEX, and PAHs. A hydrocarbon odor and a sheen were noted on purge water from MW-1. Analytical results demonstrated no detection of any analytes in MW-5. DRO was detected in all other MWs, with a maximum concentration of 5, 000 ug/L in MW-1, exceeding the cleanup level of 1,500 ug/L. RRO was present in MW-1 and -4, with a maximum concentration of 1,400 ug/L, below the cleanup level of 1,00 ug/L. BTEX contaminants were not detected in any MWs above their respective reporting limits. The following PAHs were detected at concentrations below cleanup levels: 1-methylnaphthalene, acenaphthene, fluorene, phenanthrene, and pyrene. The report will be uploaded when a final PDF version is submitted to the department.

Flannery Ballard

8/11/2022

Site Characterization Workplan Approved

The ADEC approved the "2022 Groundwater Monitoring Work Plan - Craig Power Plant" dated August 4, 2022. The WP proposes another round of groundwater sampling to take place September 2022 to assess groundwater conditions at the site and to attain additional groundwater data to evaluate contamination trends over time. Groundwater samples will be collected from all five monitoring wells and will be analysed for DRO, DRO, VOCs, PAHs and chloride. Chloride will be sampled for as an indicator of salinity in the monitoring wells. Additionally, two temporary monitoring wells will be installed along the tideline in an attempt to sample the groundwater seep at low tide to assess whether surface water has been impacted by petroleum contamination. This investigation will also perform a "Building Survey and Indoor Air-Sampling Questionnaire" for the Shaan Seet property. Photos of this property will be included in the report.

Flannery Ballard

12/8/2022

Meeting or Teleconference Held

The ADEC met with APT, Shaan Seet, and RMI to discuss a failing retaining wall located to the west of the power plant, between the APT and Shaan Seet hotel. Work on the retaining wall will be done in the footprint of a DRO plume, beneath the former 10,000 gallon aboveground fuel tank. The ADEC requested a work plan for work on the retaining wall, and suggested that soil samples be taken during the retaining wall work to aid site characterization of the DRO plume.

Flannery Ballard

1/10/2023

Site Characterization Report Approved

The ADEC approved the "2022 Groundwater Monitoring Report". This report summarized the September 2022 groundwater monitoring event in which groundwater was sampled from MWs 1-5, and from two locations on the beach using temporary monitoring wells. DRO was detected up to a maximum of 3,600 ug/L, exceeding in MW1 and MW4. RRO was detected in MW1 and MW4, but was below cleanup levels. Total Aromatic Hydrocarbons (TAHs) and Total Aqueous Hydrocarbons (TAqH) were below Water Quality Standards. The ADEC concurs with the conclusions of the report that another round of groundwater sampling should be undertaken. Report is uploaded.

Flannery Ballard

2/22/2023

Document, Report, or Work plan Review - other

In response to a request from RP, the DEC is reviewing the 2018 approved WP to see if it is applicable for 2023 planned soil sampling and retaining wall repair work. The DEC is asking for additional detail to be added to the WP or an addendum be submitted for approval.

Flannery Ballard

3/23/2023

Site Characterization Workplan Approved

The ADEC approved a Groundwater Monitoring report this date. All monitoring wells will be sampled and analyzed for DRO, RRO, VOCs, and PAHs. Chloride will also be analysed for. All purge water will be kept onside in a 55-gallon drum.

Flannery Ballard

5/9/2023

Site Characterization Workplan Approved

The DEC approved a work plan amendment to the 2018 approved work plan. The amendment proposes to excavate two test pits 1) in the vicinity of the 10,000-gallon old fuel storage tank and 2) by the cooling tower structure. Test pits will be excavated until the water table, soils will be field screened and soil samples will be collected to be analyzed for GRO, DRO, RRO, and a subset for VOCs, PAHs, PCBs, and TCLP.

Flannery Ballard

11/16/2023

Document, Report, or Work plan Review - other

A sampling report was reviewed and comments sent. The report detailed excavating two test pits, one near the 10,000 gallon AST (Site 1) and the other near the cooling tower (Site 2). The Site 1 test pit was excavated down to 6 feet, but no further because of sloughing. Two sample were collected and analyzed for DRO, RRO, GRO, PAH, and VOC. Both samples collected (2-4' and 4-6') exceeded migration to groundwater cleanup levels for DRO. No groundwater was reported in the Site 1 test pit. Site 2 test pit was excavated to 6 feet to the groundwater interface. Two sample were collected and analyzed for DRO, RRO, GRO, PAH, and VOC. Both samples collected (2-4' and 4-6') exceeded migration to groundwater cleanup levels for DRO. One sample was also analyzed for PCB and TCLP metals. There were no cleanup level exceedances for those parameters.

Lisa Krebs-Barsis

11/16/2023

Document, Report, or Work plan Review - other

The groundwater monitoring report was reviewed and comments were sent. Water sampling was planned for the five wells installed in 2020. MW3 was found to be destroyed. MW1 was not sampled because free product was observed in the well. Samples were collected from MW2, MW4, and MW5 and analyzed for DRO, RRO, BTEX, and PAH. There were no exceedance of cleanup levels, however the groundwater in MW2 was above the screened interval.

Lisa Krebs-Barsis

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

Groundwater Monitoring Report - September 2022

Groundwater Monitoring Report - September 2021

No associated sites were found.

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: Craig Power Plant

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Groundwater Monitoring Report - September 2022

Groundwater Monitoring Report - September 2021

Missing Location Data

State of Alaska Department of Environmental Conservation