| Action Date |
Action |
Description |
DEC Staff |
| 10/4/2005 |
Site Added to Database |
site split off from Northway DERP file for separate tracking |
Debra Caillouet |
| 10/4/2005 |
GIS Position Updated |
with site intake, WGS84/NAD83 from Topozone |
Debra Caillouet |
| 10/4/2005 |
Site Characterization Report Approved |
The ROST/LIF investigation report covering field work in 2003 and 2004 was approved. The report presents the results of an investigation at Ham Lake, Areas 40 and 43 at the Formerly Used Defense Site, the Northway Staging Field.
The Rapid Optical Screening Tool and its laser-induced fluorescence (LIF) probe were used to place seventy LIF pushes at the site in 2003 and 2004. Probable petroleum contamination was found in 51 of the 70 LIF pushes and is primarily in the smear zone from six to ten feet below ground surface. The extent of contamination remaining at the site has been defined and will be used in a risk assessment to determine future actions at the site.
The report fairly presents the information obtained from the investigation, meets the requirements of 18 AAC 75.355, Site Characterization, and is approved. |
Debra Caillouet |
| 2/28/2006 |
Update or Other Action |
The Draft Final Chemical Data Report, Northway Staging Field and Alaska Communication System, Summer 2005 was reviewed and a comment letter sent to the Corps. |
Debra Caillouet |
| 2/2/2007 |
Update or Other Action |
Staff provided minor comment on the 2006 GW report for Ham Lake and the ACS. |
Debra Caillouet |
| 8/17/2007 |
Update or Other Action |
staff approved a gw sampling plan for 2007 |
Debra Caillouet |
| 11/9/2007 |
Exposure Tracking Model Ranking |
|
Debra Caillouet |
| 2/21/2008 |
Site Characterization Report Approved |
The 07 groundwater monitoring report was approved |
Debra Caillouet |
| 9/2/2009 |
Site Characterization Workplan Approved |
2009 Northway Field Work, Technical Memorandum August 28, 2009 was approved. Monitoring wells at the ACS and Ham Lake Sites will be sampled, monitoring wells at the TACAN site will be decommissioned and the soil stockpile at the ACS site will be sampled. Please provide the results of the sampling and analysis when available.
|
Debra Caillouet |
| 12/29/2009 |
Update or Other Action |
A revised Inventory Project Report (INPR) was received for the Northway Staging Field. The US Army Corps of Engineers has divided the staging field into four projects so that closures of the individual sites within the staging field can be counted. One project consists of the OU1 and OU3 sites that have already been closed by DEC, the next contains OU4 and OU5 sites that are ready for closure. The third project is the Ham Lake site that requires a Feasibility Study, Proposed Plan and Decision Document. The last project includes four areas that have data gaps that need to be resolved, Areas 4, 24, 26 and 48. |
Debra Caillouet |
| 2/5/2010 |
Document, Report, or Work plan Review - other |
Draft 2009 Groundwater Monitoring Report and Ex-Situ Soil Treatablity Study Report, Northway ACS and Staging Field, Ham Lake and TACAN |
Debra Caillouet |
| 2/24/2010 |
Document, Report, or Work plan Review - other |
Ham Lake Feasibility Study Report, Northway Staging Field, Final February 2010
The FS evaluates nine remedial alternatives that include Institutional Controls and monitored natural attenuation for the soil and groundwater along with several active treatment/removal actions. None of the alternatives evaluated are expected to achieve numeric cleanup levels in a reasonable amount of time but the implementation of Institutional Controls to prevent use of the site or movement of the soil or groundwater would prevent unacceptable risk.
|
Debra Caillouet |
| 4/7/2010 |
Document, Report, or Work plan Review - other |
2009 Groundwater Monitoring and Ex-Situ Soil Treatability Study Report, Northway ACS, Ham Lake and TACAN approved |
Debra Caillouet |
| 1/26/2011 |
Document, Report, or Work plan Review - other |
2010 Draft Groundwater Monitoring and Ex-Situ Soil Treatability Study Report, November 2010, Northway ACS and Ham Lake |
Debra Caillouet |
| 1/31/2011 |
Update or Other Action |
A 2nd draft proposed plan for Ham Lake was reviewed. |
Debra Caillouet |
| 5/10/2011 |
Document, Report, or Work plan Review - other |
2010 Groundwater Monitoring and Ex-Situ Soil Treatability Study Report, March 2011, Northway ACS and Ham Lake. The report provides documentation of the sampling events at Ham Lake and at the ACS in 2010. Groundwater contamination continues to exist at both sites although the MAROS evaluation shows it to be stable. The report also recommends continuing the annual sampling program at both sites.
|
Debra Caillouet |
| 6/14/2011 |
Document, Report, or Work plan Review - other |
Draft Treatment System Decommissioning and Groundwater Monitoring Work Plan, Northway ACS and Northway Staging Field (Ham Lake), May 2011
DEC has no objection to the implementation of the described work.
|
Debra Caillouet |
| 8/15/2011 |
Document, Report, or Work plan Review - other |
Final Treatment System Decommissioning and Groundwater Monitoring Work Plan, Northway ACS and Northway Staging Field (Ham Lake), July 2011 The objective of the project activities is to complete decommissioning of all of the in-situ and ex-situ treatment system equipment and to monitor the groundwater contamination. The treated soil from the ex-situ treatment cell will be placed on the gravel access road in the immediate area. The security fencing will remain in place for future use of the current landowners, Northway Natives Incorporated.
Groundwater monitoring wells will be sampled in order to monitor the extent of groundwater contamination at the site. Eight wells are located at the ACS site and seven at the Ham Lake site will be sampled in 2011.
|
Debra Caillouet |
| 9/26/2011 |
CERCLA Proposed Plan |
|
Debra Caillouet |
| 3/5/2012 |
Document, Report, or Work plan Review - other |
Final 2011 Treatment System Decommissioning and Groundwater Monitoring Report, Northway Alaska Communication System and Northway Staging Field (Ham Lake), February 2012 |
Debra Caillouet |
| 5/24/2012 |
Document, Report, or Work plan Review - other |
Draft Long Term Management Plan for Annual Groundwater Monitoring, Northway Alaska Communications System and Northway Staging Field (Ham Lake) Formerly Used Defense Sites, Northway Alaska April 2012 approved
|
Debra Caillouet |
| 9/28/2012 |
CERCLA ROD Approved |
The USACE issued the Decision Document for the HTRW Project |
Debra Caillouet |
| 1/14/2013 |
Document, Report, or Work plan Review - other |
Draft 2012 Treatment System Groundwater Monitoring Report, Northway ACS and Ham Lake, December 2012 |
Debra Caillouet |
| 5/15/2014 |
Document, Report, or Work plan Review - other |
Draft Land Survey Work Plan, Northway Staging Field (Ham Lake)May 2014. The plan when implemented will begin the establishment of the Institutional Controls described in the Decision Document.
The only comment on this plan is to consider spelling out United States, Army Corps of Engineers on the signs rather than the acronym, USACE.
|
Debra Caillouet |
| 10/23/2014 |
Document, Report, or Work plan Review - other |
Technical Memorandum, Draft 2014 Ham Lake Survey Report, Formerly Used Defense Site, Northway Staging Field, Northway Alaska |
Debra Caillouet |
| 11/23/2015 |
Update or Other Action |
Site management transferred to Carnahan. |
John Carnahan |
| 6/9/2016 |
Document, Report, or Work plan Review - other |
Provide approval to FINAL 2015 GW monitoring report for Staging Area and ACS sites. Next proposed sampling in 2018. |
John Carnahan |
| 8/29/2017 |
Update or Other Action |
Telecon with RPM to discuss JEP development. Will include Draft/Final workplan modifications and reporting for LTM that was identified in DD. |
John Carnahan |
| 5/23/2019 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the Draft 2018 Northway Staging Area site Periodic Review |
Kevin Fraley |
| 12/30/2019 |
Document, Report, or Work plan Review - other |
DEC Approved the 2018 Final Groundwater Sampling Report, Northway Staging Field (Ham Lake), dated November 2019. Seven monitoring wells were evaluated, measured and sampled over 17-19 September 2018. Diesel range organics were the only petroleum, oil, lubricant contaminant that was sampled that had concentrations above cleanup levels, in two wells. Manganese exceeded cleanup levels in six wells, presumed to be attributed to bioremediation. Continued monitoring is recommended on the three-year cycle.
|
Kevin Fraley |
| 3/3/2020 |
Document, Report, or Work plan Review - other |
DEC approved the 2018 Final Periodic Review, Northway Staging Field (Ham Lake), Formerly Used Defense Site Project Number F10AK034706, Northway, Alaska, dated January 2020. As part of the 2018 periodic review, a site inspection was conducted, the conceptual site model was evaluated, and protectiveness of the remedy was assessed. The site inspection indicated that signage was in-place, most monitoring wells were in good condition, and there was no evidence of land use change or soil disturbance. The conceptual site model evaluation indicated that the contaminants of concern, exposure pathways, and potential receptors were largely unchanged since the Decision Document was issued. The assessment of the protectiveness of the remedy stated that the remedy is functioning and is protective of human health and the environment. However, DEC notes that a deed notice documenting the contamination at the site and setting requirements for management of the contamination, required as part of the remedy, has not yet been implemented, despite more than five years having passed since the issuance of the Decision Document. A Uniform Environmental Covenants Act (UECA) covenant must be filed for the site as soon as possible in order for the remedy to be fully implemented and for protectiveness to be assured. In correspondence with the U.S. Army Corps of Engineers (USACE), it was stated that the process to file a UECA covenant for this site has been initiated. DEC requests that USACE provide a covenant implementation plan and deadline within 30 days of receiving this approval.
|
Kevin Fraley |
| 5/26/2021 |
Document, Report, or Work plan Review - other |
Received 2020 Draft GW Monitoring report for review. Comments sent 06/09/2021. Final approval sent 7/22/2021 |
Shonda Oderkirk |
| 12/7/2023 |
Offsite Soil or Groundwater Disposal Approved |
Analytical soil results from one of the generated waste streams (soil cuttings) were below CULs. This soil will be returned to the site and spread on the ground surface. The other generated waste stream had analytical soil results above CULs. This soil will be taken to US Ecology. |
Shonda Oderkirk |
| 5/17/2024 |
Document, Report, or Work plan Review - other |
ADEC received the Draft 2023 Groundwater Monitoring Report, Northway Staging Field (Ham Lake), FUDS Project No. F10AK034706, Northway, Alaska on 05.13.2024; ADEC comments sent on 06.21.2024; RTCs received on 07.11.2024; ADEC RTCs sent on 07.29.2024; USACE RTCs received on 10.03.2024. |
Jenny Gates |
| 7/19/2024 |
Document, Report, or Work plan Review - other |
The Draft 2023 Periodic Review Report for the Northway Staging Field (Ham Lake) FUDS was received on 07.19.2024; ADEC RTCs sent on 08.27.2024; USACE RTCs received on 10.03.2024; DEC final comments sent on 10.29.2024. |
Jenny Gates |
| 11/15/2024 |
Document, Report, or Work plan Review - other |
PARTIAL APPROVAL: 2023 Northway Ham Lake Groundwater Monitoring Report (August 2024). This report describes the results of the monitoring well replacement, groundwater sampling, and survey activities conducted in 2023. DEC approved the report with the exception of the application of the MAROS software to evaluate trends and plume stability. The MAROS software specifies that it is intended for mature sites where the plume has been completely delineated for all contaminants of concern (COCs), which has not been completed at Ham Lake. Additionally, the MAROS output indicates that the contaminant plume may be spreading toward the lake; that concentrations of benzene are increasing in some wells; that the installation of additional wells should be considered; and that sampling should be conducted more frequently (annually) at this site. At this time, DEC will not consider output from the MAROS software as a line of evidence for plume stability or trends. DEC’s regulatory decisions will be based on compliance with the applicable 18 AAC 75 regulations and cleanup levels. |
Jamie McKellar |
| 12/2/2024 |
Document, Report, or Work plan Review - other |
DECISION DOCUMENT NON-CONCURRENCE: DEC issued a letter on December 2, 2024 documenting our non-concurrence with the protectiveness determination in the Final 2023 Periodic Review Report, Northway Staging Field (Ham Lake). DEC asserts that the appropriate determination for this site is “Protectiveness Deferred” with a commitment to collect additional information such that the effectiveness of the remedy can be evaluated. |
Jamie McKellar |
