| Action Date |
Action |
Description |
DEC Staff |
| 3/21/1994 |
Site Characterization Report Approved |
(Old R:Base Action Code = RI - Remedial Investigation). Received "Site Assessment Murphy Dome LRRS". Report details remedial investigation and contains risk assessment for all sites at Murphy Dome. Review conducted for RI and initial comments submitted via phone conversation. |
Laura Noland |
| 3/21/1994 |
Update or Other Action |
Received "Site Assessment Murphy Dome LRRS". Report contains human health and ecological risk assessment for designated sites at Murphy Dome. Report concludes that the sites do not pose any health risk. |
Laura Noland |
| 4/21/1994 |
Site Added to Database |
File# 100.38.040 Murphy Dome LRRS. TPH and DRO. |
Laura Noland |
| 4/25/1994 |
Site Characterization Report Approved |
(Old R:Base Action Code = SI - Site Investigation). Received and reviewed "Final Site Characterization Technical Memorandum Site Assessment Murphy Dome LRRS, Alaska" which provides sample results for all study sites at the facility. |
Laura Noland |
| 5/27/1994 |
Update or Other Action |
(Old R:Base Action Code = RPL2 - Site Information Request Letter). Sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. |
Jeff Peterson |
| 7/29/1994 |
Meeting or Teleconference Held |
(Old R:Base Action Code = RI - Remedial Investigation). Attended meeting where Air Force and contractor presented remedial investigation work plan, plans for community relations, and management action plan. Public meeting planned for 9/94. |
Laura Noland |
| 8/5/1994 |
Update or Other Action |
(Old R:Base Action Code = RI - Remedial Investigation). Reviewed "Draft Work Plan, Remedial Investigation/Feasibility Study dated July 1994" and sent comments and requested revised work plan. |
Laura Noland |
| 10/17/1994 |
Update or Other Action |
ADEC submitted comments for Human Health and Ecological Risk Assessment for Murphy Dome LRRS and Fort Yukon LRRS report dated 2/94. ADEC determined that risk assessment was not done according to EPA or state guidance and does not address future risk at sites. |
Laura Noland |
| 3/24/1997 |
Update or Other Action |
Site updated by Shannon and Wilson, based on the Air Force Relative Risk Evaluation Worksheet dated 8/23/95. |
S&W |
| 1/23/2004 |
Meeting or Teleconference Held |
Staff reviewed and commented on an Air Force letter outlining the risk approach and method for determining need for remedial action at the Murphy Dome LRRS. The Air Force has contracted with CH2MHill to develop a 4-phase analysis of a large diesel spill that occurred in the 1970s and 1980s. Staff will meet with Air Force and their contractor next week to discuss the project. DEC plans to hire a contractor to review the calculations. (Buck, Crapps) |
Patrice Buck |
| 7/29/2005 |
GIS Position Updated |
Updated the location of the site in the database. |
Colin Craven |
| 4/3/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Colin Craven |
| 4/11/2011 |
Document, Report, or Work plan Review - other |
Contaminated sites staff reviewed and sent comments on a draft Proposed Plan that presents final proposed remedial alternatives for five Installation Restoration Program sites at the Murphy Dome Long Range Radar Station. |
Tamar Stephens |
| 6/19/2015 |
Document, Report, or Work plan Review - other |
Received work plan for data gap investigation concurrent with site SS07. The objectives of the work plan include 1) Evaluation of the effectiveness Ultraviolet Optical Screening Tool (UVOST) for characterization of soil contamination at the Murphy Dome sites, and 2)Delineation of the areal extent of petroleum hydrocarbon contamination above 250mg/kg associated with the boundaries of the SS01 and SS07 sites. DSMOA Joint Execution Plan (JEP) listed a Feasibility Study for this site, but this was changed to a data gap investigation as additional site characterization was warranted. |
Joy Whitsel |
| 3/23/2016 |
Site Characterization Report Approved |
DEC approved the report entitled "Final Report for Data Gap Investigation at SS01 and SS07, Murphy Dome, Alaska". The purpose of the data gap investigation was to identify and evaluate data gaps remaining at the Murphy Dome SS01 and SS07 sites. The report described activities, results, and conclusions of the investigation, including the following: development of maps to show known contaminated areas and identify data gaps; UVOST screening to delineate the horizontal and vertical extent of petroleum hydrocarbon contamination in the investigation areas; collection of soil samples for correlation with the UVOST screening results, and for evaluation of contaminant concentration; and collection of surface water samples from the seeps to evaluate the potential for continued downgradient contaminant transport. The latter activity could not be completed because no seeps were found at the time of investigation. |
Joy Whitsel |
| 6/13/2018 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (DEC) reviewed the “Draft Supplemental
Remedial Investigation Work Plan, Murphy Dome Long Range Radar Station, Murphy Dome, Alaska,
WAA #1 (SS007), WAA #2 (SS001)” dated April 2018. This work plan describes soil and groundwater
sampling intended to address data gaps in site characterization at Murphy Dome Long Range Radar Station. Comments on the work plan provided to the U.S. Air Force via email. |
Melinda Brunner |
| 1/3/2020 |
Document, Report, or Work plan Review - other |
DEC reviewed Draft Report for Supplemental RI at SS001 and SS007. This report described the installation and subsequent decommissioning of 6 groundwater monitoring wells that were all dry, along with several soil boring sampling events and 'ephemeral water body (EWB)' sampling events. There were many exceedances for DRO and RRO in the soils, and one exceedance of RRO in an EWB. Historical surface water samples were above clean up levels for EDB and alpha-BHC. DEC has emailed comments to the USAF. |
Tim Sharp |
| 2/5/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 71767 Waste accumulation. |
Tim Sharp |
| 6/3/2020 |
Site Characterization Report Approved |
DEC approved the Final Supplemental Remedial Investigation Work Plan, Revision 1 for Murphy Dome LRRS. The work plan is intended to characterize the site, address data gaps, and fully delineate fuel contamination in soils and surface water at sites SS001 and SS007, as well as fully delineating lead contamination in soil at site SS002. This will be accomplished by site wide UVOST sampling, soil borings near lead impacted soil, and surface water grab samples if encountered. |
Tim Sharp |
| 10/7/2021 |
Document, Report, or Work plan Review - other |
DEC sent comments on the Draft Supp RI Report. The report detailed further delineation of fuel, chlorinated solvent, and pesticide contamination at the site. Comments focused on regulation of EWBs as surface water sources and the administrative closure of SS001 by USAF. |
Tim Sharp |
| 11/7/2023 |
Document, Report, or Work plan Review - other |
DEC provided responses to comments regarding the redline Final Preliminary Assessment Report for Aqueous Film-Forming Foam Areas Murphy Dome Long Range Radar Site, Alaska, dated October 2023. |
Ginna Quesada |
| 11/30/2023 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved the Final Preliminary Assessment Report for Aqueous Film-Forming Foam Areas Murphy Dome Long Range Radar Site, Alaska, dated November 2023. |
Ginna Quesada |
| 1/23/2024 |
Meeting or Teleconference Held |
Meeting with Air Force project manager to discuss the schedule for upcoming work in 2024. |
Ginna Quesada |
