| Action Date |
Action |
Description |
DEC Staff |
| 11/2/2012 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 11/5/2012 |
Potentially Responsible Party/State Interest Letter |
PRP letter sent to the Port Director, Port of Anchorage on this date. |
Grant Lidren |
| 11/21/2012 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79357 name: MOA Port of Anchorage |
Bill O'Connell |
| 6/19/2013 |
Update or Other Action |
On this date, ADEC recieved the Groundwater Monitoring Work Plan Tract H, Port of Anchorage Addition 1 submitted by R&M, dated June 19, 2013. five of the six historical wells were located. Up to four MWs will be sampled if practicable. At least one MW will be decomisioned. |
Grant Lidren |
| 7/29/2014 |
Site Characterization Report Approved |
On this date, ADEC received the Groundwater Monitoring Report Tract H, POA Addition 1 submitted by R&M dated July 28, 2014. Monitoring Well MW-12B-1 could not be located. Monitoring Well MW-3A-1 was decommissioned. The four monitoring wells MW-12B-2, MW-C-1, MW-6D-1, and MW-A-1A were analyzed for BTEX, GRO, and DRO. MW-6D-1 was the only monitoring well to contain contamination above Table C groundwater cleanup levels. MW-6D-1 contained benzene at 0.0358 mg/L and a slight hydrocarbon odor and sheen was observed in monitoring well. Groundwater, encountered at 2.71 to 13.11 feet bgs, is tidally influenced and flows west/northwest towards Cook Inlet. |
Grant Lidren |
| 1/13/2015 |
Site Characterization Report Approved |
On this date, ADEC received the Groundwater Monitoring Report Tract H, POA Addition 1 submitted by R&M dated January 13, 2015. The four monitoring wells MW-12B-2, MW-C-1, MW-6D-1, and MW-A-1A were analyzed for BTEX, GRO, and DRO. MW-6D-1 was the only monitoring well to contain contamination above Table C groundwater cleanup levels. MW-6D-1 contained benzene up to 0.0226 mg/L and a slight hydrocarbon odor and sheen was observed in the monitoring well. Groundwater, encountered at 3.77 to 13.30 feet bgs, is tidally influenced and flows west/northwest towards Cook Inlet. |
Grant Lidren |
| 1/13/2015 |
Site Characterization Report Approved |
On this date, ADEC received the Contaminated Soil Assessment New Marine Storage Building POA drafted by S&W and submitted by R&M dated December 2014. Four soil samples collected from five exploratory borings were either ND of below ADEC cleanup levels. Four test pits were then advanced to confirm geotechnical conditions. Petroleum odors were encountered in one of the test pits. Soil samples were collected from two of the test pits. The test pit associated with the petroleum odor contained DRO at 501 mg/kg from a soil sample collected 6 feet bgs. The other test pit sampled did not contain contaminant concentrations above ADEC cleanup levels. Contaminated soil was removed from the area of the contaminated test pit. The top six feet of soil (75 cy) contained a headspace reading of less than 10 ppm and was set aside to be used as backfill. Contaminated soil was encountered at 6 feet bgs based off PID readings and visual and olfactory senses. Approximately 25 cy of contaminated soil was excavated to a depth of 8.5 feet bgs and placed in a lined stockpile. The final excavation area was 10 feet * 25 feet * 8.5 feet bgs. Three soil samples collected from the bottom at 8.5 feet bgs contained DRO between 708 to 845 mg/kg. Four sidewall samples collected 2.8 to 4.5 feet bgs contained DRO between ND to 757 mg/kg. Two soil samples collected from the onsite stockpile contained DRO at 303 and 354 mg/kg. The excavation was then backfilled with the 75 cy stockpile and brought to grade with clean fill. Monitoring well MW-A-1 located 175 feet west of the site adjacent to Knik Arm contained DRO at 0.793 mg/L in 2013 and DRO at 0.157 mg/L in 2014. |
Grant Lidren |
| 5/28/2015 |
Document, Report, or Work plan Review - other |
Reviewed Work Plan for Removal of Contaminated Sediment, Soil, and Groundwater for the POA Storm System 3 enhancement project. Contaminated sediment in the storm drain piping will be removed by water jet and vac truck and hauled directly to ASR for thermal treatment. Excess water will be decanted, containerized and treated at NRC Alaska. The storm drain outlet will be plugged to keep contaminated sediment and water from being flushed into Cook Inlet. Contaminated soil excavated during the project will also be hauled directly to ASR for thermal treatment based on field screening results and other observations. Soil that is potentially clean will be stockpiled for use as backfill, soil that is potentially contaminated and soil that is potentially contaminated with RCRA levels of benzene will be stockpiled and sampled to determine disposal or treatment options. If excavation dewatering is required, the water will be containerized, filtered through a GAC filter, and then discharged to the sanitary sewer under a permit from AWWU. |
Bill O'Connell |
| 2/17/2016 |
Document, Report, or Work plan Review - other |
Reviewed Contaminated Soil Screening and Segregation Report for Port of Anchorage Storm System 3 repairs. Contaminated soil was encountered and removed at four locations within the overall project area: storm drain manhole (SDMH) 3/4, SDMH 2/2A, SDMH 1/1A, and the outfall. Contaminated soil excavated from these areas was placed in a designated storage area or direct-hauled to ASR for treatment. At SDMH 3/4, contamination was encountered at 6-8 feet bgs resulting in the excavation of approximately 190 cy of soil which was hauled to ASR for treatment. At SDMH 2/2A, approximately 25 cy of contaminated soil was excavated and stockpiled at the storage area for future disposal. At SDMH 1/1A, approximately 64 cy of contaminated soil was excavated and stockpiled at the storage area for future disposal. At the outfall, approximately 60 cy of contaminated soil was excavated and stockpiled at the storage area for future disposal. It was noted that contamination remained at the bottom of the excavation at each area. Water that was removed from the excavations was passed through a treatment system and discharged to the sanitary sewer under permit from AWWU. Sediment removed from manholes and piping by vac truck was stockpiled at the storage area. All material in the storage area was transported for treatment at Alaska Soil Recycling or for disposal at Anchorage regional landfill |
Bill O'Connell |
| 10/11/2017 |
Document, Report, or Work plan Review - other |
Reviewed and approved Environmental Sampling Plan for the Petroleum Cement Terminal. Soil and groundwater samples will be collected along the planned route of utilities from the ABI Cement Dome property, along the shore with Cook Inlet to POA property to evaluate for the presence of contaminants. Data will be used to inform the handling of soil and water and evaluate worker safety during execution of the utility project. (reference 2100.38.246 Port of Anchorage ABI Cement Terminal). |
Bill O'Connell |
| 3/1/2018 |
Document, Report, or Work plan Review - other |
On this date, ADEC approved the Contaminated Soil and Water Management Plan Terminal Road Water Line Rehabilitation POA submitted by S&W and dated February 2018. in 2018, AWWU will install a waterline on the north side of Terminal Road and south of the AFSC and Tesoro #2 tank farms. |
Grant Lidren |
| 9/11/2018 |
Update or Other Action |
On this date, the ADEC Division of water approved the Terminal Road excavation dewatering for the AWWU Terminal Road Project (AKG002132). |
Grant Lidren |
| 10/30/2018 |
Update or Other Action |
approximately 4,100 cubic yards of DRO and PAH contaminated soil was transported to the Anchorage Regional Landfill during the 2018 Terminal Road Water line project. It is assumed this soil was overburden. |
Grant Lidren |
| 6/11/2019 |
Update or Other Action |
On this date, ADEC received the 2019 ML&P 35KV Feeder Loop Project Port of Alaska submitted by R&M and dated June 11, 2019. A powerline will be installed through or adjacent to three contaminated sites: MOA Port of Anchorage, Crowley Facility Port of Anchorage, and the Port of Alaska - Former Defense Fuel Support Point. The work plan details: construction practices for soil handling, groundwater and surface water handling; and investigation methods. Work to be completed during the summer of 2019. |
Grant Lidren |
| 6/11/2019 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the PAMP South Backlands Stabilization Proposed Storm Drain Test Pitting submitted by R&M and dated May 22, 2019. Three test pits were excavated along two proposed storm drain alignments associated with the Port of Alaska Modernization Program (PAMP) South Backlands Stabilization (SBS) Project. The testpits were excavated 1 to 3 feet bgs below the expected excavation for the storm water pipes. (a total depth of 3.5 to 7.0 feet bgs). Analytical soil samples collected from test pit 1 and 2 only contained detectable concentrations of DRO and RRO below ADEC cleanup levels. Test pit 3 was not sampled based on a low pid reading up to 7.4 ppm. Note: the proposed storm drains are in the same area as an historic petroleum groundwater plume from the updradient 2100.38.311 Tesoro #1 Port of Anchorage site. |
Grant Lidren |
| 6/17/2019 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Port of Anchorage Modernization Program Petroleum and Cement Terminal Environmental Characterization Report submitted by R&M and dated February 5, 2018. A total of eleven test borings were advanced with five completed as temporary well points in October 2017. Soil samples collected 7 to 10 feet bgs were above cleanup levels from the four test borings 05, 06, and 07( located downgradient of the 2100.38.311 Tesoro #1 Port of Anchorage site and the delta western tank farm) and 11 (located upgradient of the ABI cement dome) with GRO up to 629 mg/kg, DRO up to 6,640 mg/kg, 1,2,4-trimethylbenzene up to 43.5 mg/kg, 1,3,5-trimethylbenzene up to 17.9 mg/kg, benzene up to 0.416 mg/kg, ethylbenzene up to 11.9 mg/kg, naphthalene up to 4.34 mg/kg and xylenes up to 54.5 mg/kg. Additionally, a slight fuel odor was noted from test boring 11 at 8 to 10 feet bgs Groundwater was encountered 2 to 15 feet bgs and was noted to be highly tidally influenced. Five temporary well points were advanced. Two of these temporary wells, TW-03 and TW-04 located downgradient of the 2100.38.311 Tesoro #1 Port of Anchorage site and the delta western tank farm) contained contaminant concentrations above cleanup levels with DRO up to 87.9 mg/L, RRO up to 1.74 mg/L, benzene up to 15.2 ug/L, ethylbenzene up to 15.8 ug/L, naphthalene up to 1.74 ug/L, and 1-methylnapthalene up to 26.9 ug/L. |
Grant Lidren |
| 6/17/2019 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Port of Anchorage Modernization Program Petroleum and Cement Terminal Environmental Characterization Report: Waterline Realignment Addendum submitted by R&M and dated November 6, 2018. The purpose of this addendum was to investigate the potential location of a buried World War II ship (used as a military tank landing craft) to support route selection for waterline installation as part of the proposed Petroleum and Cement Terminal (PCT) Project. Three soil borings were advanced 2 to 12 feet bgs adjacent to the ABI cement dome. Only testpit RM18-TH01 located west of the ABI cement dome contained contaminant concentrations above cleanup levels with EDB up to 0.000378J mg/kg. |
Grant Lidren |
| 6/25/2019 |
Document, Report, or Work plan Review - other |
ADEC received the PAMP SOUTH BACKLANDS STABILIZATION SAMPLING AND ANALYSIS PLAN submitted by R&M and dated June 25, 2019. |
Grant Lidren |
| 7/22/2019 |
Offsite Soil or Groundwater Disposal Approved |
On this date, ADEC approved the transport of 500 cubic yards of soil excavated from around a MOA manhole at the north corner of the POA South Backlands downgradient of Tesoro #1 |
Grant Lidren |
| 12/26/2019 |
Document, Report, or Work plan Review - other |
On this date, ADEC received the Environmental Management Plan, 1717 Tidewater Road submitted by Shannon & Wilson and dated December 26, 2019. A broken water line will be replaced and soil and groundwater will need to be removed and discharged during the project. Preliminary sampling was conducted in December 2019 to characterize potential contaminants in soil and groundwater. A grab groundwater sample from a dug pothole and collected from a bailer contained benzene up to 11.4 ug/L. Two soil samples collected from 4.0 feet bgs and the groundwater interface at 6 feet bgs contained benzene up to 0.0797 mg/kg, 1-methylnapthalene up to 0.0542 mg/kg, and naphthalene up to 0.0538 mg/kg. During the project, suspected contaminated soil will be excavated and transported to ASR and excavation water will be discharged into the sanitary sewer. |
Grant Lidren |
| 2/11/2020 |
Site Characterization Report Approved |
ADEC received the ML&P 35KV Feeder Loop Project After-Action Report submitted by R&M and dated February 11, 2020. During the project, they encountered petroleum contamination, evident by olfactory and screening results. No contaminated soil was removed during the project. |
Grant Lidren |
| 8/5/2020 |
Site Characterization Report Approved |
On this date, ADEC received the Soil and Groundwater Handling Report, 1717 Tidewater Road submitted by Shannon & Wilson and dated August 5, 2020. In November 2019, a waterline broke located at the 1717 Tidewater Road Matson Building and contaminated soil/groundwater was encountered. Prior to repair work, a grab groundwater sample collected from a pothole excavation contained benzene at 11.4 ug/L above Table C groundwater cleanup levels. Additionally, a test pit was advanced west of the building and the vicinity of the waterline to a depth of 8 feet bgs. Groundwater was encountered at 6 feet bgs. Two soil samples collected: one at 4.0 to 4.5 feet bgs and one at 6.0 to 6.5 feet bgs. The soil sample collected at 4.0 to 4.5 feet bgs contained detectable concentrations of contaminants, but below cleanup levels. The soil sample collect 6.0 to 6.5 feet bgs contained naphthalene up to 0.0538 mg/kg and benzene up to 0.0797 mg/kg above method two MTG cleanup levels. During excavating, 2,300 gallons of water was removed. A water sample collected from the 2,300 gallons of water stored in a weir tank prior to discharge into the sanitary sewer contained arsenic at 3.07 ug/L and benzene at 27.7 ug/L. Soil was excavated to a depth of 11 feet bgs during replacement of the water line which was located 10 feet bgs. Elevated pid readings and petroleum smell were noted starting at 1.5 feet bgs and generally increased with depth. The highest pid reading of 537 ppmv was noted at 7 to 9 feet bgs. Significant soil contamination was noted throughout the excavation at the groundwater interface. Approximately 560 cubic yards of contaminated soil was transported to ASR for thermal remediation. After repair work was completed, clean fill was placed around the pipe. The overburden excavated material to a depth of 1.5 feet bgs (assumed clean based on olfactory, visual, and low pid readings (less than 20 ppm)) was then put back into the excavation. The excavation was then brought to grade with clean fill. |
Grant Lidren |
| 10/27/2020 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved off-site transport of 20 cubic yards of contaminated soil to ASR. The soil was generated during excavation associated with the kiosk lane concrete slab at the Matson Facility. The excavation occurred west of 1917 Tidewater Road in the middle of the Matson yard. DRO was present at 404 mg/kg. |
Janice Wiegers |
| 12/8/2020 |
Document, Report, or Work plan Review - other |
Reviewed work plan for groundwater and soil sampling to support storm drain repairs at POA. Three borings/monitoring wells will be sampled near areas where storm drain repairs are planned for 2021. |
Bill O'Connell |
| 1/11/2021 |
Update or Other Action |
Commented on the POA-2011-00488 Knik Arm Nationwide Permit 3 proposing to excavate and discharge fill below mean high water to install structured during the POL #2 Cathodic Protection Anode Sled Replacement Project. Excavation and discharge of 500 cy of material is planned. Location of project was corrected on 1/25/2001,however, comments remained the same. DEC recommended preconstruction characterization. In the absence of that, evidence of contamination or sheen during the project should be reported to the PPR program. |
Janice Wiegers |
| 1/19/2021 |
Document, Report, or Work plan Review - other |
On this day ADEC received the Port of Anchorage (POA) Storm Drain Repairs Investigation Report for Tract H of the POA Subdivision submitted by Restoration Science & Engineering LLC and dated January 11, 2021. Data collected during the investigation is intended to support future repair work on Storm Drain Systems that were damaged during the November 30, 2018 earthquake which occurred in Southcentral Alaska. The report details activities conducted from December 9-14, 2020, in accordance with an ADEC approved work plan (December 8, 2020). Activities consisted of advancing three soil borings, installing monitoring wells, and collecting soil and groundwater samples for analysis.
Boring locations coincide with locations selected for geotechnical data along damaged Storm Drain Systems 001, 004, and 008. Soil boring/monitoring well BH-01 was installed near System 001 storm drain pipe and advanced to a depth of 42 feet below ground surface (bgs). Soil boring/monitoring well BH-03 was installed near System 004 storm drain pipe and advanced to a depth of 32 feet bgs. Soil boring/monitoring well BH-02 was installed near System 008 storm drain pipe and advanced to a depth of 22 feet bgs. As borings were advanced, soil samples were field screened for VOCs using a photo-ionization detector (PID) and visual and olfactory observations were recorded in field notes. Soil samples were collected for later laboratory analysis. Following boring advancement and soil sampling, monitoring wells were installed and developed prior to collecting groundwater samples for analysis. All soil and groundwater samples from these locations were analyzed for gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), volatile organic compounds (VOCs), Polycyclic Aromatic Hydrocarbons (PAHs), and Resource Conservation and Recovery Act (RCRA) metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium and silver). Groundwater was also analyzed for Oil and grease and Total Aromatic Hydrocarbons (TAH) to determine if groundwater was within AWWU Discharge Permit Limitations.
Field observations of soil and field screening yielded no evidence of contamination in borings. Analytical soil sample results were compared against ADEC’s Method 2 Migration to Groundwater (MTG) Soil Cleanup Levels in 18 AAC 75.341, Tables B1 and B2. GRO was detected in all three of the borings at levels below the MTG cleanup level (300 mg/kg), DRO was detected in borings BH2 and BH3 below the MTG cleanup level (250 mg/kg), select VOCs were detectable in samples from borings BH2 and BH3 at levels below their respective MTG cleanup levels, four PAH compounds were detectable at levels below MTG cleanup levels, and several RCRA Metals were detectable in all samples below MTG cleanup levels. Of all samples collected, only Arsenic exceeded MTG cleanup levels (0.20 mg/kg) with results ranging from 3.69 to 11.5 mg/kg. These levels are within the range of natural background levels throughout Alaska.
Groundwater samples collected from monitoring wells BH-01 and BH-02 exceeded groundwater cleanup levels in ADEC’s 18 AAC 75.345, Table C for RRO of 1.1 mg/L ranging from 1.22 to 1.63 mg/L. DRO was detected in all three wells at levels below the Table C cleanup level of 1.5 mg/L. Select VOCs were detectable at levels below Table C cleanup levels in samples from BH-01 and BH-02, and were not detectable at BH-03. Select PAHs were detected at levels below Table C cleanup levels in all three monitoring wells. Arsenic was identified at levels above the Table C cleanup level of 0.52 µg/L in groundwater collected from BH-01 and BH-02 ranging from 9.21 to 14.5 µg/L. Other select RCRA metals were detected at levels below Table C cleanup levels at all three wells. Total Aromatic Hydrocarbons, and Oil and Grease results were below AWWU Discharge Permit Limitations.
Investigation derived waste (IDW) still remains onsite. Water that was removed from the monitoring wells has been containerized and a request for permission to pass contaminated water through a GAC treatment system prior to onsite disposal (at a distance from any waterbodies or wells) has been received. Soil is contained in supersacks and a request to allow land-spreading at an upland location has also been received. ADEC is evaluating the requests and will add a separate entry when a course of action for the IDW has been determined.
|
Jamie Grant |
| 2/19/2021 |
Meeting or Teleconference Held |
Meeting with BGES (consultant) and Pacific Pile and Marine (contractor) to review 2021 Port of Alaska Modernization Project in the area of the POA ABI Cement Terminal site (Hazard ID: 26258) and Tesoro #1 site (Hazard ID: 600). Discussion included 2018 Environmental Characterization Work and management of contaminated soil and water. A soil and water management plan will be submitted at a later date. |
Jamie Grant |
| 4/27/2021 |
Document, Report, or Work plan Review - other |
ADEC has reviewed and conditionally approved a Revised Soil and Groundwater Management Plan received on April 21, 2021 for Phase II of the Port of Alaska Modernization Program at the Petroleum Cement Terminal Area. |
Jamie Grant |
| 4/27/2021 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved transportation of 2000-2500 cubic yards of petroleum contaminated soil to ASR for treatment from Phase II of the Port of Alaska Modernization Project at the Petroleum and Cement Terminal. |
Jamie Grant |
| 4/28/2021 |
Document, Report, or Work plan Review - other |
DEC received a revised work plan for storm drain earthquake repairs. The work plan was reviewed and approved. |
Jamie Grant |
| 10/19/2021 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved the transport and disposal of 820 cubic yards of contaminated soil excavated during installation of a waterline for the Port of Alaska Modernization Program - PCT Project. Soils will be going to ARL. |
Jamie Grant |
| 11/1/2021 |
Offsite Soil or Groundwater Disposal Approved |
DEC received and approved a request to transport and dispose of approximately 400 cubic yards of stockpiled soil generated during the 2021 Port Modernization Program to MOA Regional Landfill. |
Jamie Grant |
| 4/8/2022 |
Document, Report, or Work plan Review - other |
Received Port of Alaska MOV Cable Replacement plan for handling contaminated soil and groundwater from Michael Baker International. Responded with comments for clarification on 4/15/22. |
Janice Wiegers |
| 7/1/2022 |
Update or Other Action |
Received request to use the Port Modernnization March 2021 work plan to characterize 900 cubic yards of soil stockpiled from the project. Some of this soil had already been spread on the security area, but was expected to be clean based on PID readings. DEC approved on this date. |
Janice Wiegers |
| 8/12/2022 |
Offsite Soil or Groundwater Disposal Approved |
Approved transport to the Anchorage Landfill of contaminated soil generated as part of the Port of Alaska Modernization Program in the summer of 2021. These soils are currently in 5 different soil stockpiles in the following areas at the port: northern expansion area, south backlands, security area, and dome area. The estimated volume of contaminated soil is approximately 2,600 cubic yards. Soil samples were analyzed for GRO, DRO, RRO, VOCs, PAHs, PCBs, and TCLP lead in accordance with the ADEC-approved Revised Soil & Groundwater Management Plan (dated March of 2021). |
Janice Wiegers |
| 9/8/2022 |
Update or Other Action |
Notified by Port staff that approximately 500 cubic yards of soil spread in the security area will be removed and transported off-site for disposal. This material was generated during the Port Modernization project in an area not expected to be contaminated, but was sampled after it was spread and was found to have 1,1,2,2-tetrachloroethane and 1,2-diboromoethane at concentrations above the soil cleanup levels. The security area where the soil was spread is part of the site known as Port of Alaska - Former Defense Fuel Support Point (hazard id 428), Tract J. The Port is planning to install a covered sand facility at this location and decided to remove the soil. |
Janice Wiegers |
| 9/14/2022 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved transport of ~160 cubic yards of contaminated soil that had been spread on the Port Security area to be disposed of at the Municipality of Anchorage landfill. Due to the exceedences of 1,2-dibromoethane and 1,1,2,2-tetrachloroethane observed in this soil, Pacific Pile and Marine scrapped the soil back up for disposal. |
Janice Wiegers |
| 12/16/2022 |
Site Characterization Report Approved |
Reviewed "SITE CHARACTERIZATION ACTIVITIES, PORT OF ALASKA STORM SYSTEM 1, ANCHORAGE, ALASKA". As part of storm drain improvements soil borings and temporary well points were sampled. Residual range organic contamination was discovered in groundwater at TW-3. |
Michael Hooper |
| 6/6/2023 |
Document, Report, or Work plan Review - other |
Reviewed Soil and Groundwater Management Report – Port of Alaska Modernization Program (2021 to 2022), dated December 2022 and submitted by BGES for work completed during Phase 2. Pacific Pile & Marine removed and tested soil near two contaminated sites: Port of Anchorage ABI Cement Terminal (Hazard ID 26258) in the southern portion of the project area and Tesoro #1 Port of Anchorage (Hazard ID 600) in the central portion of the project area. Approximately 1,309 cubic yards of obviously contaminated soil was treated at Alaska Soil Recycling. Another 4,448 cubic yards of potentially contaminated soil was stockpiled and then sent to the Anchorage landfill for disposal. Dewatering also took place in the central and southern project areas and temporarily held in weir tanks until sampling could be completed. Water was discharged to the Anchorage Wastewater Utility’s sanitary sewer system. DEC sent letter approving the report to Pacific Pile & Marine. |
Janice Wiegers |
| 7/17/2023 |
Offsite Soil or Groundwater Disposal Approved |
Approved transport of 100 cubic yards of petroleum contaminated soil from the excavation for the water stub at the administrative building at 1857 Anchorage Port Road to Alaska Soil Recycling for thermal remediation. The soil had benzene, 1,2,4-trimethylbenzene, naphthalene, sec-butylbenzene, and DRO in it. A technical memo was attached to the request that documented the sampling activities and results. |
Janice Wiegers |
| 10/30/2024 |
Document, Report, or Work plan Review - other |
DEC approved a landfarming workplan, dated 10/28/24, that was submitted for 650 cuic yards of soil from the Admin Building construction activities last year. The plan is to compost soil containing low levels of DRO and naphthalene. No PCBs or PFAS were detected in this soil. The soil will be transported to Moffitt Farm in Palmer and landfarmed/composted within a bermed area. Tilling in windrows will start next spring and will be conducted every 3 to 5 days. Prior to closure, the landfarm soil and underlying soil will be sampled. |
Janice Wiegers |
| 10/30/2024 |
Offsite Soil or Groundwater Disposal Approved |
DEC approved transport of 650 cubic yards of contaminated soil to the MOffitt Farm in Palmer. |
Janice Wiegers |
