| Action Date |
Action |
Description |
DEC Staff |
| 1/23/2015 |
Potentially Responsible Party/State Interest Letter |
Potentially responsible party / state interest letter sent to North Pacific Seafoods by PERP staff Megan Kohler. |
Mitzi Read |
| 7/22/2015 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff Megan Kohler. Spill no. 14269911201; spill date = 4/22/14; substance = bunker C oil; quantity = unknown. |
Mitzi Read |
| 7/28/2015 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 7/30/2015 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79791 name: Bunker C Valve Box, Tanks, & Piping |
Mitzi Read |
| 12/8/2015 |
Document, Report, or Work plan Review - other |
Reviewed the Soil and Groundwater Assessment and Remediation Report, dated November 2015 for the North Pacific Seafoods Red Salmon Facility - Naknek site. Excavation commenced in mid-June 2015 to remove petroleum impacted soil previously identified in 2014. Roughly 50 tons of soil was removed and disposed of at the CEMEX Soil Remediation Facility in Everett, Washington. The surface area of the final excavation was about 650 square feet and varied in depth between 2 and 5.5 feet below ground surface (bgs), dependent on where the water table was encountered. Twenty-two soil samples were collected from the base and sidewalls of the excavation; nine of which (three from the excavation sidewalls and six from the base) were submitted for laboratory analysis. Approximately 330 pounds of Oxygen Releasing Compound (ORC) was added to the base of the excavation before backfilling with clean fill. To further delineate the extent of contamination, soil samples were collected from two step out test pits advanced to the soil-groundwater interface north-northwest of the excavation area. All soil samples were analyzed for one or more of the following: gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), and benzene, toluene, ethylbenzene, and xylenes (BTEX). Groundwater samples were collected from four groundwater monitoring wells that were installed to delineate the groundwater contamination at this site. All of the groundwater monitoring wells were installed by excavation, developed, purged, and sampled. In addition to the groundwater sampling activities, several portions of the site were inspected for seeps. Two seeps (Seep-1 and Seep-2) were observed along the northwest side of the cold storage building. No seeps were observed discharging into the Naknek River. Water samples were collected from both seeps. All water samples were analyzed for one or more of the following: GRO, DRO, RRO, BTEX, and polynuclear aromatic hydrocarbons (PAHs). The seep samples were also analyzed for total aromatic hydrocarbons (TAH) and total aqueous hydrocarbons (TAqH). Analytical results revealed that DRO remains in the soils up to 20,000 mg/kg and in the groundwater up to 5.49 mg/L. The ADEC Method Two Migration-to-Groundwater (MTG) cleanup level in the soils for DRO is 250 mg/kg. The groundwater cleanup level for DRO is 1.5 mg/L. The sample collected from Seep-1 exceeded Alaska Water Quality Standards (AWQS) for TAH and TAqH with concentrations up to 0.0959 mg/L and 0.11046 mg/L, respectively. In addition, the sample collected from Seep-1 exhibited contaminant concentrations up to 6.05 mg/L DRO, 3.46 mg/L RRO, and 0.0357 mg/L benzene; all of which exceed their applicable groundwater cleanup levels. In a letter sent December 8, 2015, ADEC requested a work plan by February 1, 2016 to continue to delineate the soil and groundwater contamination. |
Joshua Barsis |
| 1/15/2016 |
Meeting or Teleconference Held |
Meeting with RP and consultant on this day. Topics included soil and groundwater delineation; surface water investigation, work plan specifics, and general overview of the site. Proposed actions for 2016 include investigating the potential impact to surface water (Naknek River), sampling current monitoring wells and seeps, and investigating the recent laundry room release. Proposed actions for 2017 include delineation and removal (if necessary). |
Joshua Barsis |
| 1/27/2016 |
Document, Report, or Work plan Review - other |
Reviewed the Soil and Groundwater Assessment and Remediation Work Plan, dated January 2016. Proposed activities include excavation of up to 50 cubic yards of impacted soil near the laundry building; groundwater monitoring well installation and development between Seep locations 1 and 2, and the Naknek River; a survey of all new and existing monitoring well locations and top of casing elevations; and continued groundwater monitoring of Wells MW-1 through MW-4. Soil and groundwater samples will be collected, screened, and submitted for laboratory analysis as appropriate. |
Joshua Barsis |
| 11/7/2016 |
Document, Report, or Work plan Review - other |
Reviewed the Groundwater Assessment and Soil Remediation Report, dated November 2016 for the North Pacific Seafoods Red Salmon Facility - Naknek site. Field activities were completed in July 2016 and consisted of excavation of impacted material near the Laundry Facility Building (LFB), installation of Monitoring Well MW5 (between the site and Naknek River), and water sampling from 4 of the 5 monitoring wells (MW1, MW2, MW4, and MW5) and two surface water seeps (Seep-1 and Seep-2).
Diesel range organics (DRO) impacted soil remains at the base of the LFB excavation up to 15,500 mg/kg, and is not fully delineated vertically to groundwater or horizontally to the west. Wells MW1 and MW2 exhibited concentrations of DRO up to 11.1 mg/l and 2.71 mg/l, respectively. MW4 and MW5 did not exhibited concentrations of DRO above the Table C groundwater cleanup levels. MW3 could not be sampled because there was not sufficient water present. It does not appear that the groundwater contamination is bounded to the southwest, north, or northeast. Analytical results from the 2016 seep samples were similar to 2015 in that Sample Seep-1 exceeded Alaska Water Quality Standards and Seep-2 did not. The sample collected from Seep-1 exceeded AWQS for total aromatic hydrocarbons and total aqueous hydrocarbons with concentrations up to 51.42 ug/l and 57.1151 ul/l, respectively.
ADEC requested work plan for additional delineation by February 1, 2017. |
Joshua Barsis |
| 3/15/2017 |
Document, Report, or Work plan Review - other |
Reviewed the Soil and Groundwater Assessment, dated March 2017 for the North Pacific Seafoods Red Salmon Facility - Naknek site. Proposed activities generally include collecting soil and water samples from 11 test pits, four of which will be completed as monitoring wells, and collecting two water samples from Seeps 1 and 2. The objective of the 2017 effort is to further evaluate the nature and extent of hydrocarbon impacts to soil and groundwater in vicinity of Fisherman Gear Building, former fuel tank farm, and the Generator Building. |
Joshua Barsis |
| 5/8/2017 |
Potentially Responsible Party/State Interest Letter |
Potentially responsible party / state interest letter sent to North Pacific Seafoods, Inc. by PERP staff Cynthia Kirkham. |
Mitzi Read |
| 10/23/2017 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PPRP staff Mark Sielaff. Spill no. 17269912001 - spill date = 4/30/17, substance = diesel; quantity = 20+ gallons, source = 3" pipeline coupling under powerhouse container. |
Mitzi Read |
| 10/23/2017 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PPRP staff Mark Sielaff. Spill no. 17269913001 - spill date = 5/10/17, substance and quantity = 0.5 gallon bunker C oil from vertical AST and ~268 additional gallons of diesel from 4/30/17 release source = vertical bunker C AST and 3" pipeline coupling under powerhouse container. |
Mitzi Read |
| 10/23/2017 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PPRP staff Mark Sielaff. Spill no. 17269913501 - spill date = 5/17/17, substance = diesel; quantity = 1 gallon, source = historical diesel contamination found while dismantling an old fueling station and removing unused piping. |
Mitzi Read |
| 10/23/2017 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PPRP staff Mark Sielaff. Spill no. 17269913701 - spill date = 5/17/17, substance = diesel; quantity = 1 gallon, source = filter housing was accidentally dropped while piping was being dismantled at the fuel station. |
Mitzi Read |
| 10/23/2017 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PPRP staff Mark Sielaff. Spill no. 17269914901 - spill date = 5/29/17, substance = diesel; quantity = 47.5 gallons, source = refueling operation left unattended. |
Mitzi Read |
| 1/2/2018 |
Document, Report, or Work plan Review - other |
Reviewed the Soil and Groundwater Assessment Report, dated November 2017 for the North Pacific Seafoods Red Salmon Facility - Naknek site. The report documents the activities performed as proposed in the 2017 Soil and Groundwater Assessment Work Plan, dated March 2017 and also in response to five additional reported spills that occurred in April and May 2017. All spills documented in the report have since been transferred from the Prevention Preparedness and Response (PPR) Program to the Contaminated Sites Program for oversight.
Aside from the limited excavation activities completed as part of the initial response actions taken, activities completed during the 2017 field effort were generally aimed at evaluating downgradient impacts from spills and delineating contaminant plumes. Activities included establishing a 70 by 110 sq. ft. gridded area to evaluate downgradient release impacts, advancing 13 test pits, installing four new monitoring wells (MW-6, MW-7, MW-8, and MW-9), and collecting soil and water samples as applicable, including from two surface water seep locations (SW-1 and SW-2).
Results of this assessment confirmed levels of DRO and RRO in the surface soils above maximum allowable concentrations (up to 128,000 mg/kg and 185,000 mg/kg, respectively) at several grid sample locations, near the generator building, and at the former tank farm. Water samples collected from Wells 1, 2, 3, 7, and 8 exhibited levels of DRO above the Table C groundwater cleanup level. Wells 4, 5, 6, and 9 were below the Table C cleanup level for DRO, but still ranged in concentrations between 0.823 mg/l and 0.97 mg/l. The groundwater cleanup level for DRO is 1.5 mg/l. It does not appear that the groundwater contamination is bounded. Analytical results from the 2017 seep samples were similar to past results in that Sample SW-1 exceeded Alaska Water Quality Standards and Sample SW-2 did not.
Recommendations provided in the report included (1) collecting groundwater samples biennially, including for natural attenuation factors; (2) conducting “opportunistic source removal” when infrastructure is removed; (3) planning for future removal of tanks and contaminated soil in the former tank farm area; and (4) implementing additional assessment in the event of a new release. The department does not concur with recommendations 1 to 3 and a more active approach to delineation and cleanup is needed. Please review ADECs letter dated January 2, 2018 for more information on this report and the associated spills. A work plan was requested by March 1, 2018 for addition characterization, delineation, and cleanup. |
Joshua Barsis |
| 3/12/2018 |
Update or Other Action |
ADEC letter response to the RP comment matrix, which encompasses “contractor response” to ADECs last comment letter, dated January 3, 2018. See file for more info. Work plan due May 1, 2018. |
Joshua Barsis |
| 5/23/2018 |
Site Visit |
Reviewed the Summary of ADEC Visit to Red Salmon Canary memorandum dated June 1, 2018. This memorandum documents the finding of ADECs site inspection performed on May 23, 2018. ADEC generally agrees with the content of the memorandum. Please see the file for the full memo. |
Joshua Barsis |
| 6/20/2018 |
Document, Report, or Work plan Review - other |
Reviewed the Soil and Groundwater Assessment Work Plan, dated June 2018 for the North Pacific Seafoods Red Salmon Facility - Naknek site. Proposed activities generally include: soil borings at selected release areas to evaluate vertical extent of contamination; completion of monitoring wells and/or installation of temporary well points upgradient of previously identified release areas to further delineate the extent of hydrocarbon impacts; selective soil sampling at new boring location; annual groundwater sampling and water level gauging at all new and existing monitoring wells; and annual seep water sampling. Soil from borings will be screened for petroleum hydrocarbons by visual observations and heated headspace measurements using a PID. Also, the top of casing elevation at all new and existing monitoring wells will be surveyed.
ADEC had three comments on the plan: (1) Section 3.1 states that one sample will be collected from the apparent most contaminated interval of the boring. However, at least two samples should be planned from each boring; one from the interval that exhibits the apparent greatest hydrocarbon impact and the other from the smear zone. If evidence of contamination is not observed, then only the smear zone sample need to be collected. In the event that the groundwater is shallow to the point that one sample can be collected, then only one sample needs to be collected, nearest the smear zone; (2) Please include the full VOC list as well PAHs for 10% soil and water samples; and (3) Please include provisions to sample on the other side of the Laundry Building tank to evaluate horizontal migration.
ADEC requested the revised work plan by July 15, 2018.
|
Joshua Barsis |
| 6/25/2018 |
Update or Other Action |
Reviewed the response to comments (RTC) table regarding ADECs June 20, 2018 letter. ADEC accepts the comments and will not require a revised work plan. Please see work plan, TRC table, and ADEC comments for more information. |
Joshua Barsis |
| 11/28/2018 |
Document, Report, or Work plan Review - other |
Reviewed the Soil and Groundwater Assessment Report, dated November 2018. A total of five soil borings (SB18-1 through SB18-4, and MW-10) were advanced in September of 2018. Borings SB18-2, SB18-3, and SB18-4 were advanced at former spill locations 4, 1, and 3, respectively, to characterize nature and extent of remaining contamination, and to better evaluate the potential for contaminated groundwater at each spill location. An analytical soil sample was not collected from Boring SB18-2 because the environmental contractor was not able to hand augur beyond the clean fill layer. Boring SB18-1 was advanced adjacent to the laundry building source area to better evaluate horizontal impacts in that area. Boring MW-10 was placed upgradient of all source areas at this facility and was completed as a groundwater monitoring well. In addition to the soil boring and monitoring well installation activities described above, three temporary well points (TW-01 through TW-03) were installed along the eastern hillside to better delineate the area of known DRO and benzene contaminated groundwater.
In total and not including duplicates, four soil samples were collected from five soil borings, nine groundwater samples were collected from nine groundwater monitoring wells, and two surface water samples were collected from two seeps (Seep 1 and Seep 2). All samples were submitted for laboratory analysis of DRO, GRO, RRO, and BTEX. A limited number (10%) of samples were also submitted for laboratory analysis of PAHs.
A well survey was also completed at the site. Groundwater was confirmed to flow generally southeast, in the topographically downgradient direction.
At former spill locations 1 and 3, DRO, benzene, ethylbenzene, and xylenes were detected above applicable soil cleanup levels; DRO up to 16,700 mg/kg and 23,200 mg/kg, respectively. All samples results from Boring SB18-1 and MW-10 were below applicable soil cleanup levels. As noted above, a sample was not collected from former spill location 4 (Boring SB18-2).
In groundwater samples, DRO was detected above the Table C groundwater cleanup level (GCL) of 1.5 mg/l in Wells MW1 at 3.42 mg/l, MW2 at 1.57 mg/l, MW3 at 2.88 mg/l, MW4 at 1.62 mg/l, MW7 at 2.21 mg/l, MW8 at 4.12 mg/l and MW9 at 7.48 mg/l. Benzene was present in Wells MW3, MW7 and MW8 at 6.53 µg/l, 5.26 µg/l, and 28.2 µg/l, respectively, all of which exceed the Table C GCL of 4.6 µg/l. RRO was detected slightly above the Table C GCL in only Well MW9 at 1.14 mg/l. None of the water samples collected from Temporary Well Points TW1 and TW2 exhibited contaminants above Table C GCLs. Well Point TW3 could not be sampled because of insufficient water recharge in the well.
Consistent with historical results, the sample collected from Seep 1 exceeded Alaska Water Quality Standards and Seep-2 did not. The sample collected from Seep-1 exceeded AWQS for total aromatic hydrocarbons and total aqueous hydrocarbons with concentrations at 24.65 ug/l and 34.68 ug/l, respectively.
In a letter dated November 28, 2018 ADEC requested a work plan for further groundwater monitoring be submitted by February 2019. |
Joshua Barsis |
| 1/15/2019 |
Update or Other Action |
Reviewed NPSIs response to DEC comment table matrix, dated December 12, 2018. The submittal also included updated Tables 2 and 3 for VOC results in soil and GW, and the quality assurance report for the data. |
Joshua Barsis |
| 2/13/2019 |
Document, Report, or Work plan Review - other |
Reviewed the work plan dated January 31, 2019 and titled: 2019 Groundwater Monitoring Work Plan for the North Pacific Seafoods Red Salmon Facility - Naknek site. Proposed activities mainly consist of collecting water samples from 9 monitoring wells (MW1 through MW4 and MW6 through MW10) and 2 surface water seeps in September 2019. An additional water sample will be collected from Well MW9 in March 2019 at the request of ADEC. |
Joshua Barsis |
| 11/4/2019 |
Document, Report, or Work plan Review - other |
Reviewed the report dated October 2019 and titled: 2019 Groundwater Monitoring Report for the North Pacific Seafoods Red Salmon Facility - Naknek site. Groundwater monitoring was completed two times in 2019, once in May and once in September. Only one well, Well MW-9, was sampled in May; as specifically requested by ADEC for comparison to the 2018 result, which then exceeded the Table C groundwater cleanup level (GCL) for DRO. A total of 9 permanent monitoring wells (MW1 though MW4, and MW6 through MW10), one temporary well (MW-5R), and two surface water seeps were sampled in September. All water samples were analyzed for GRO, DRO, RRO, and BTEX. Select samples were also analyzed for the full suite of VOCs. All water samples were comparted to the Table C GCLs. Seep samples are additionally compared to the TAH and TAqH, as required by the Alaska Water Quality Standards. At this point, the groundwater plume appears generally bounded, although contamination does appear to be reaching the river sediments. Otherwise, the 2019 results are comparable to the 2018 results. Further monitoring will be performed in 2020. |
Joshua Barsis |
| 4/16/2020 |
Update or Other Action |
Per call with Stan at SLR, due to the Covid-19 pandemic, the sampling planned for summer 2020 may need to be delayed. ADEC has no objections to a potential schedule shift. |
Kara Kusche |
| 3/3/2021 |
Workplan Requested |
ADEC requested a work plan for:
• Two sampling events at all wells, one to occur during plant operations to rule out seasonal variation or impacts from water withdrawal during operations.
• Sampling of pre-treatment water (during the period of plant operations) from production well 3 (used for seafood processing), approximately 200 feet west of the area of known contamination.
• Proposal to demonstrate that water withdrawal at production well 3 is not making contaminants migrate due to drawdown.
• Sampling at the seeps.
Additional work recommended for the work plan should include:
• Delineation of contamination downgradient of MW5R and the seeps- soil, groundwater, sediment and surface water, as appropriate.
• Removal of soil with contaminants in excess of maximum allowable concentrations. Heavily contaminated surface soils are unmitigated source areas likely contributing to exceedances of water quality standards at the seeps.
• Active remediation tactics to prevent further down slope migration of contaminants.
|
Lisa Krebs-Barsis |
| 3/5/2021 |
Update or Other Action |
North Pacific Seafoods requested that they perform sampling per the previous work plan in March 2021. The department approved of the first sampling event to be conducted under the existing work plan but requested that the second sampling event be conducted under a new work plan that would include the 3-3-21 workplan request items. |
Lisa Krebs-Barsis |
| 6/14/2021 |
Site Characterization Report Approved |
In March 2021, samples were collected at MW1, MW2, MW3, MW4, MW6, MW7, MW8. Samples could not be collected from MW5R, MW9, MW10 and the two surface water locations. GRO was reported in three of six primary groundwater samples: but all detectable GRO concentrations were below the ADEC
groundwater cleanup level. DRO was reported in all six groundwater samples: MW-1 at 12,800 µg/L, MW-2 at 1,860 µg/L, MW-4 at 1,680 µg/L, and MW-8 at 2,930 µg/L exceeded the ADEC groundwater cleanup level of 1,500 µg/L. RRO were reported in MW-1 at a concentration of 1,390 µg/L, above the ADEC cleanup level of 1,100 µg/L. RRO was detected in all other groundwater samples at concentrations below the ADEC cleanup level. One or more BTEX compounds were reported in groundwater from monitoring wells MW-1, MW-2, and MW-8; but were below their cleanup levels (Table 2). The groundwater sample collected from MW-1 was analyzed for VOCs. 1,2,4 –
Trimethylbenzene was reported at a concentration of 69.8 µg/L, exceeding the ADEC cleanup
level of 56 µg/L. Naphthalene was reported at a concentration of 9.92 µg/L, exceeding the
cleanup level of 1.7 µg/L. All other VOCs were reported below their respective ADEC cleanup
level or below the laboratory limit of detection.
The department requested another round of sampling in 2021 including items requested in the March 3, 2021 request for work plan. |
Lisa Krebs-Barsis |
| 6/30/2021 |
Site Characterization Workplan Approved |
A work plan for groundwater monitoring, received June 21, 2021, was approved. The work that will be conducted is sampling of MW1, MW2, MW3, MW4, MW6, MW7, MW8, MW9, MW10. Each sample will be analyzed for DRO, RRO, GRO, and BTEX. MW1 will be analyzed for the full suite of VOC and PAH. A temporary point will be installed at the former location of MW5R and the sample will be analyzed for DRO, RRO, GRO, PAH, and the full suite of VOC. Two surface seeps will be analyzed for TAH and TAqH. If water supply well Well 3 is operational, a pre treatment sample will be collected and analyzed for the DRO, RRO, GRO, PAH, and full suite of VOC. |
Lisa Krebs-Barsis |
| 10/20/2021 |
Document, Report, or Work plan Review - other |
ADEC received report on 10/20. ADEC will review the report and provide comments. |
Erin Gleason |
| 2/23/2022 |
Site Characterization Report Approved |
ADEC reviewed the Groundwater Monitoring Report dated October 2021 and it is now approved. Approval Letter sent on this day. During the groundwater monitoring event conducted in July 2021, nine of the ten groundwater monitoring wells at the site were sampled for GRO, DRO, RRO, and BTEX. Seven of the nine wells contained concentrations of DRO above ADEC groundwater cleanup levels. Three monitoring wells contained concentrations of RRO above ADEC groundwater cleanup levels. Naphthalene was present above ADEC groundwater cleanup levels in two monitoring wells. Two surface water seeps were sampled. Analytical results from surface water seep SW-2 revealed concentrations of DRO (14,900 µg/L), RRO (59,500 µg/L), and benzo(g,h,i)perylene (1.25 µg/L) above ADEC cleanup levels. Both surface water seeps indicated concentrations of one or more BTEX constituents above ADEC cleanup levels. Due to insufficient recharge, MW-5R located below the Cold Storage Building was not sampled. Additionally, production well 3 was not sampled because it was not reportedly in operation during 2021. ADEC requested a new work plan for 2022 to further monitor groundwater at the site including the installation of a temporary well between the seeps and the Naknek River (preferably near the MW-5R location), sediment sampling from the Naknek River, sampling of production well 3, sampling at the seeps, and removal of contaminated soil and active remediation tactics to prevent further down slop migration of contaminants. |
Naomi Mason |
| 4/1/2022 |
Meeting or Teleconference Held |
Meeting with ADEC and North Pacific Seafoods, Inc. (NPSI) to discuss comments addressed in response to October 2021 Groundwater Monitoring Report. NPSI will provide a supplementary work plan to address additional items recommended by ADEC and a formal response to comments. The next field investigation is anticipated for August/September 2022. During the meeting, NPSI discussed the limitations on the site to conducting additional work recommended by ADEC. Long-term solutions were also addressed including a remediation plan, baseline samples to estimate microbial capacity, updated conceptual site model, and an assessment of plume stability. |
Naomi Mason |
| 4/5/2022 |
Update or Other Action |
North Pacific Seafood Incorporated (NPSI) responded to ADEC's Work Plan Approval Letter for the July 2021 Groundwater Monitoring Report. |
Naomi Mason |
| 5/24/2022 |
Update or Other Action |
ADEC responded to North Pacific Seafoods Incorporated's comments on this date. |
Naomi Mason |
| 5/25/2022 |
Document, Report, or Work plan Review - other |
ADEC received report on this date. ADEC will review the report. |
Naomi Mason |
| 6/23/2022 |
Document, Report, or Work plan Review - other |
ADEC reviewed the work plan received on 5/25/2022 and has provided comments for revision. |
Naomi Mason |
| 7/11/2022 |
Site Characterization Workplan Approved |
ADEC approved the revised supplemental work plan received on 6/30/2022 on this date. The work plan involves soil sampling, groundwater monitoring, installation of a monitoring well beneath the Cold Storage Building (former location of MW-5R), sediment sampling in 3 locations, seep sample collection, and a groundwater sample from production well #3 that is currently used for fish processing. |
Naomi Mason |
| 1/13/2023 |
Site Characterization Report Approved |
ADEC received the revised 2022 Soil Assessment and Groundwater Monitoring report on December 30, 2022. The report has been reviewed and is now approved. During sampling efforts in August 2022, groundwater, drinking water, surface water, soil, and sediment were sampled in addition to microbial analysis. Groundwater analytical results revealed concentrations of DRO that were higher than average historical results in seven of the ten monitoring wells sampled, exceeding the groundwater cleanup level in eight of the ten monitoring wells (up to 34,400 micrograms per liter [µg/L] in MW-01). Generally, DRO and RRO concentrations are increasing substantially while BTEX concentrations are decreasing. Soil sample analytical results revealed DRO above migration to groundwater cleanup levels (MTG CULs) in all seven locations, exceeding human health cleanup levels in four of the seven locations sampled (up to 74,300 milligrams per kilogram [mg/kg]). Various PAHs exceeded MTG CULs in three locations. Laboratory analytical results revealed concentrations below applicable cleanup or screening levels or non-detect for sediment, surface water, and the drinking water supply well (Well #3). |
Naomi Mason |
| 3/28/2023 |
Meeting or Teleconference Held |
Meeting held on this date between North Pacific Seafoods, SLR, and ADEC to discuss the objectives for 2023. SLR is currently putting together a feasibility study to look into several different remedial options including but not limited to in-situ bioremediation and/or the demolition of the Fisherman Gear Storage Building and removal of the aboveground storage tanks in the area, giving more access to soil for source removal. ADEC expressed concern over the increasingly high concentrations of DRO in groundwater, groundwater sampling is on hold for the 2023 season only while remedial options are investigated. A work plan is due by December 31, 2023. |
Naomi Mason |
| 8/7/2024 |
Site Characterization Workplan Approved |
The revised Remediation Plan for Red Salmon Processing Facility (work plan), dated May 30, 2024, has been reviewed/approved. The work plan is a multi-phase, multi-year remediation plan to reduce soil and groundwater contamination levels at the site. Pre-remediation activities include the removal of impeding infrastructure adjacent to the Fisherman’s Gear Storage Building and clearing the designated area for soil stockpiling. Phase 1 includes baseline sampling and analysis of soil, groundwater, and the footprint of the proposed stockpile area, prior to any excavation activities. Phase 2 includes excavating soils that exceed maximum allowable or cleanup levels. Excavated soils will be temporarily stockpiled in accordance with 18 AAC 75.370. All soil will remain onsite until laboratory results are received, and disposal decisions are finalized. Phase 3 includes groundwater monitoring to assess the dissolved phase plume condition in response to soil removal and samples are proposed to be collected two years after the completion of Phase 2. Interim reports after each completed phase and a final report documenting all activities will be submitted to ADEC for review and approval. |
Stacee Henderson |
