| Action Date |
Action |
Description |
DEC Staff |
| 10/20/2017 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 9/28/2020 |
Document, Report, or Work plan Review - other |
DEC approved the Final Preliminary Source Evaluations Work Plan, Fort Wainwright, Alaska (dated September 2020). The document describes a proposed investigation approach for preliminary source evaluations (PSEs) at multiple sites located on Fort Wainwright, Alaska (FWA). The sites planned for investigation are; CANOL Pipeline Pump Station, North Refueling (four source areas), Building 3480 UST 208, Building 3030 South Loading Dock, TCE in monitoring well AP-5531 (near Building 3007 Drainage Swale), Building 3038 and Sage Hill. The objective of conducting this PSE work is to determine if contamination remains that may present a threat to human health or the environment, and to determine appropriate further action. This PSE work is expected to occur Fall 2020. |
Erica Blake |
| 2/11/2021 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved the transport of 150 gallons of purge water generated from four sites (TCE in monitoring well AP-5531 - near B3007 Drainage Swale, Bldg 3030 South Loading Dock, North Refueling, and OU4 Landfill) on Fort Wainwright, Alaska from the Fort Wainwright hazardous waste facility (Building 3489) to U.S. Ecology in Grand View, Idaho for treatment and disposal. |
Erica Blake |
| 6/15/2021 |
Document, Report, or Work plan Review - other |
ADEC received and reviewed the Draft Preliminary Source Evaluation Report for Building 3030 South Loading Dock dated April 2021. The Preliminary Source Evaluation (PSE) Report documents the activities performed to evaluate potential soil and groundwater contamination at the Building 3030 South Loading Dock Neely Road Site. The report documents the presence of tetrachloroethylene (PCE), trichloroethylene (TCE), and daughter product concentrations in the groundwater above applicable clean up levels. ADEC agrees with the recommendation in the report to move to a RI. |
Cascade Galasso-Irish |
| 7/30/2021 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 80158 name: Bldg 3030 South Loading Dock - Neely Road |
Cascade Galasso-Irish |
| 8/17/2021 |
Document, Report, or Work plan Review - other |
Approval of the Final Preliminary Source Evaluation Report, Building 3030 South Loading Dock, Neely Road on this date. Site will move to an RI/FS to address the he presence of tetrachloroethylene (PCE), trichloroethylene (TCE), and daughter product concentrations in the groundwater above applicable clean up levels. |
Cascade Galasso-Irish |
| 11/22/2021 |
Document, Report, or Work plan Review - other |
ADEC provided review comments for the "Technical Memo for the Investigation of the Vapor Intrusion Pathway for Building 1060 and 3030 at Ft. Wainwright, Alaska" (Undated) to the U.S. Army. The technical memorandum describes soil gas port installation locations at Building 1060 (within Operable Unit 5) and Building 3030 (South Loading Dock). An expedited review of this document was requested from the Army with soil gas port installation planned for December 1, 2021. |
Erica Blake |
| 12/1/2021 |
Document, Report, or Work plan Review - other |
ADEC provided responses to comments for the "Technical Memo for the Investigation of the Vapor Intrusion Pathway for Building 1060 and 3030 at Ft. Wainwright, Alaska" (Undated) to the U.S. Army. ADEC accepted the soil gas sample port locations proposed by the Army and assumes the Army will conduct the work in accordance with 18 AAC 75 and Vapor Intrusion Guidance (November 2017). Soil gas port installation work started on this date (December 1, 2021). |
Erica Blake |
| 12/2/2021 |
Document, Report, or Work plan Review - other |
ADEC provided approval for the "Technical Memo for the Investigation of the Vapor Intrusion Pathway for Building 1060 and 3030 at Ft. Wainwright, Alaska" (document undated) to the U.S. Army. The technical memorandum describes sample locations for installing sub-slab soil gas sample ports, and documents locations for indoor and ambient air samples at Building 1060 and Building 3030 on Fort Wainwright, Alaska (FWA). Approval of the technical memorandum occurred after the work was completed, however no analytical samples were collected. |
Erica Blake |
| 12/2/2021 |
Document, Report, or Work plan Review - other |
ADEC provided approval for the "Technical Memo for the Investigation of the Vapor Intrusion Pathway for Building 1060 and 3030 at Ft. Wainwright, Alaska" (document undated) to the U.S. Army. The technical memorandum describes sample locations for installing sub-slab soil gas sample ports, and documents locations for indoor and ambient air samples at Building 1060 and Building 3030 on Fort Wainwright, Alaska (FWA). Approval of the technical memorandum occurred after the work was completed. This field effort was for the sample port installation only, and obtaining regulatory approval for the sample locations in Building 1060 and Building 3030. |
Erica Blake |
| 12/8/2021 |
Document, Report, or Work plan Review - other |
ADEC provided comments for the "Uniform Federal Policy – Quality Assurance Project Plan - Pre-Draft Vapor Intrusion Study Fort Wainwright Army Base Fairbanks, North Star Borough, Alaska" (dated November 17, 2021) to the U.S. Army. The document describes vapor intrusion sampling for collecting subslab soil gas, indoor air and ambient air samples at Building 1060 and Building 3030 on Fort Wainwright, Alaska (FWA). This vapor intrusion study will confirm if there is a vapor intrusion risk to human receptors in the two buildings. |
Erica Blake |
| 2/3/2022 |
Document, Report, or Work plan Review - other |
ADEC provided responses to comments for the Uniform Federal Policy – Quality Assurance Project Plan - Draft Vapor Intrusion Study Fort Wainwright Army Base Fairbanks, North Star Borough, Alaska (dated January 2022) to the U.S. Army. All responses were accepted, with three comments having additional questions requiring an additional response from the Army. The UFP-QAPP will be used to guide sampling efforts for a vapor intrusion study at both Building 1060 (within Operable Unit 5) and at Building 3030 (South Loading Dock area) to assess if there is a vapor intrusion risk in the buildings. |
Erica Blake |
| 3/4/2022 |
Document, Report, or Work plan Review - other |
ADEC provided approval for the "Uniform Federal Policy – Quality Assurance Project Plan - Final Vapor Intrusion Study Fort Wainwright Army Base Fairbanks, North Star Borough, Alaska" (dated March 2022) to the U.S. Army. This vapor intrusion study will confirm if there is a trichloroethene (TCE) vapor intrusion risk to human receptors in Building 1060 (within Operable Unit 5) and in Building 3030. |
Erica Blake |
| 8/5/2022 |
Document, Report, or Work plan Review - other |
ADEC completed a review of the Draft Preliminary Source Evaluation (PSE) for Building 3030 and Building 1060 Vapor Intrusion (VI) Study. The PSE Report details indoor air and sub-slab soil gas sampling efforts during late winter to help determine if VI is occurring and to evaluate the concentrations of chlorinated volatile organic compounds (VOCs) in buildings 1060 and 3030. All samples were analyzed for VOCs, including trichloroethelyne (TCE) and perchloroethelyne (PCE) along with their degradation products. The report recommends a follow up sampling event to occur in late summer or early fall to capture seasonal fluctuations in VI.
ADEC recommended a mitigating action to address vapor concentrations migrating through the “Crawlspace Hatch in Utility Closet off Hallway” location to limit the current exposure occurring to receptors in that area.
|
Tim Sharp |
| 8/23/2022 |
Site Visit |
ADEC, Army, USACE, USAEC, EPA conducted a site visit of 1599, 801 Drum Burial Site, Beacon Tower Landfill, some construction sites (namely the Aquatics Center construction adjacent to the Oak Avenue Pipeline, and the North Town Sink Hole. Additionally, scoping for the August VI sampling efforts at 1060 and 3030 were discussed. |
Tim Sharp |
| 2/21/2023 |
Document, Report, or Work plan Review - other |
DEC has reviewed the Draft Preliminary Source Evaluation and Groundwater Monitoring Work Plan, which details soil and groundwater sampling at the Beacon Tower Landfill location via test pits, soil borings, and temporary monitoring well installation, and groundwater sampling at the Building 3030 site via installation of three permanent monitoring wells. Samples collected at Beacon Tower Landfill will be analyzed for gasoline, diesel, and residual range organics (GRO, DRO, RRO), volatile and semi-volatile organic compounds (VOCs, SVOCs), pesticides, herbicides, Resource Conservation and Recovery Act (RCRA) metals, polychlorinated biphenyls (PCBs), dioxins and furans, and explosives. Groundwater samples from Building 3030 will be analyzed for VOCs only. Waste streams will also be analyzed for per- and polyfluoroalkyl substances (PFAS) to determine disposal options. |
Tim Sharp |
| 9/29/2023 |
Document, Report, or Work plan Review - other |
DEC completed a review of the Draft Simplified Field-Screening Plan for Building 3030 Parking Lot Improvement Project. The work plan details field-screening activities during geotechnical explorations for the parking lot improvements project for the Building 3030 parking lot. Field screening will be conducted for volatile compounds during soil boring activities at the project site. Project work is in an area with no known soil contamination, however, there is known tetrachloroethylene (PCE) contamination in the groundwater underlaying the site. Planned soil boring depths will terminate above groundwater levels. Any discoveries of contamination need be reported to the Prevention, Preparedness, and Response Program (PPRP) as required under 18 AAC 75.300. |
Tim Sharp |
| 10/17/2023 |
Document, Report, or Work plan Review - other |
DEC Approved the Revised Simplified Field-Screening Plan for the Building 3030 Parking Lot Improvement Project. All comments were incorporated and accepted. |
Tim Sharp |
| 3/11/2024 |
Document, Report, or Work plan Review - other |
DEC completed a review of the Draft Building 3030 Groundwater Monitoring Tech Memo. The tech memo details monitoring well installation, soil sampling, and groundwater investigation at the Building 3030 South Loading Dock Neely Road site. Three new monitoring wells were installed, developed, and sampled. Soil and groundwater samples were analyzed for volatile organic compounds (VOCs). No VOCs were detected in soil samples, but there were limited detections in wells FTW-MW-2023006 and FTW-MW-2023007 below project action limits (PALs). PALs were the EPA Regional Screening Levels (RSLs) for resident soil or tap water, with a carcinogenic target risk of 1x10-6 and a non-carcinogenic target hazard quotient of 0.1. Soil results were reported in wet weight as unpreserved soil samples were not provided to the lab for percent moisture calculations, resulting in suboptimal data quality. |
Tim Sharp |
| 4/25/2024 |
Document, Report, or Work plan Review - other |
DEC has completed a review of the Draft Doyon Utilities Addendum to the Post-Wide Sampling and Analysis Plan (SAP) for the P2213 Building 3030 Utilidor Rehabilitation. This SAP Addendum describes upgrades to the utiliduct system located near Building 3030. Aside from the known chlorinated solvents at the site, the utiliduct systems on FWA have been known to contain lead based paint, asbestos, and polychlorinated biphenyl (PCB) contamination. DEC has requested that solid waste generated from this work be sampled for these potential contaminants of concern prior to disposal. |
Tim Sharp |
| 8/8/2024 |
Document, Report, or Work plan Review - other |
DEC has reviewed the Response to Comments (RTCs) for the Groundwater Monitoring Technical Memorandum Building 3030 South Loading Dock Neely Road Fort Wainwright, Alaska. The document describes 2023 groundwater monitoring at the Building 3030 South Loading Dock Neely Road site (B3030) at Fort Wainwright, Alaska. Site activities included monitoring well installation, soil sampling, and groundwater investigation. All responses to comments have been addressed and the final document has been requested for approval. |
Carly Jensen |
| 9/25/2024 |
Document, Report, or Work plan Review - other |
The final version of the Groundwater Monitoring Technical Memorandum Building 3030 South Loading Dock Neely Road Fort Wainwright, Alaska was received on September 13, 2024. The final document describes 2023 groundwater monitoring at the Building 3030 South Loading Dock Neely Road site (B3030) at Fort Wainwright, Alaska. Site activities included monitoring well installation, soil sampling, and groundwater investigation.
All responses to comments have been addressed in the final document and are accepted. This document is now approved. |
Carly Jensen |
