| Action Date |
Action |
Description |
DEC Staff |
| 4/24/1992 |
Meeting or Teleconference Held |
ADEC met with USGS and Air Force. Site considered no further action pending ADEC review. |
Former Staff |
| 5/20/1992 |
Site Added to Database |
Petroleum soil contamination. |
Former Staff |
| 9/1/1992 |
Preliminary Assessment Approved |
USGS conducted sampling at several stained areas outside building where oily wastes were dumped. Two TPH soil samples at 10 ppm and 2980 ppm. Noland snt comments 12/15/93. |
Laura Noland |
| 1/24/1994 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 12/5/1994 |
Update or Other Action |
(Old R:Base Action Code = SI - Site Investigation). Reviewed Draft Summary Site Investigation Report for IRP sites 17 - 23. Appears that work was conducted without an approved work plan and several problems are evident: POL sampling not conducted at POL contaminated site (Site 17), POL methods do not appear to be approved AK methods, several metals found above MCLs and high levels in soil. Meeting with USAF scheduled 12/13/94 and final report due 3/95. |
Laura Noland |
| 4/28/2000 |
Spill Transferred from Prevention Preparedness and Response Program |
Contaminated soils under leaking hydraulic lift in auto shop. Spill estimated at >100 gallons under concrete slab in building, no containment. 14 cubic yards contaminated soil removed thus far. RP is removing all parts of device. Samples taken, clean-up plan uncertain. |
Amanda Stark |
| 11/8/2005 |
Update or Other Action |
Staff review site summaries for 23 IRP sites at Clear. The following comment was sent to the Air Force for this site: Site 22 (SS022) is the Auto Hobby Shop. The text states that it is available to Clear AFS personnel to work on their personal vehicles. Please clarify if that is still true and if so, please identify the current waste management practices. The PA in 1991 found TPH up to 10,400 mg/Kg in surface soil. Soil sampling during the 1994 RI found DRO up to 1890 mg/Kg and GRO up to 472 mg/Kg in surface soil and 1980 mg/Kg DRO, 251 mg/Kg GRO at 5-7' bgs. Lead was also detected up to 1220 mg/Kg in surface soil. One monitoring well was installed on the upgradient side of the building. The RI recommended limited soil excavation. The Air Force proposes to complete an FS, PP, and ROD for the site. DEC suggests that additional soil sampling is needed to completely define the extent of contamination existing at Site 22. |
Debra Caillouet |
| 7/19/2006 |
Update or Other Action |
Staff reviewed and provided comment on Draft Work Plan for Remedial Investigations at Sites 11, 13, and 21; and Investigation to Support Feasibility Study Development at Site 22 |
Debra Caillouet |
| 8/9/2006 |
Site Characterization Workplan Approved |
The Final Work Plan for Remedial Investigations at Sites 11, 13, and 21; and Investigation to Support Feasibility Study Development at Site 22 was approved
|
Debra Caillouet |
| 3/19/2007 |
Update or Other Action |
Staff submitted comment to the Air Force on the Draft Supplemental Remedial Investigation and Closure Report for Site 22 |
Debra Caillouet |
| 3/19/2007 |
Exposure Tracking Model Ranking |
|
Debra Caillouet |
| 8/19/2008 |
Update or Other Action |
The ADEC received an updated Community Involvement Plan for the
Environmental Restoration Program at Clear Air Force Station. |
Debra Caillouet |
| 3/20/2009 |
Update or Other Action |
Staff sent minor comment to the Air Force on the Draft Final Supplemental Remedial Investigation |
Debra Caillouet |
| 6/1/2009 |
Site Characterization Report Approved |
The Final Supplemental Remedial Investigation Report for Site 22, Clear AFS, April 2009 was approved. |
Debra Caillouet |
| 8/12/2009 |
Document, Report, or Work plan Review - other |
The final site 22 feasibility study was approved. |
Debra Caillouet |
| 3/23/2010 |
Proposed Plan |
The final PP was recieved and DEC has no objection to publication for public comment. |
Debra Caillouet |
| 4/12/2010 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 72642 spills. |
Debra Caillouet |
| 5/21/2010 |
Document, Report, or Work plan Review - other |
The final 2009 well decommissioning report documents the proper closure of 55 wells throughout the base. It recommends an additional 20 wells be decommissioned. |
Debra Caillouet |
| 9/16/2010 |
Update or Other Action |
Comment was sent to the Air Force on the draft ROD |
Debra Caillouet |
| 2/24/2011 |
CERCLA ROD Approved |
SS022. The major component of the selected response
action is presented below.
? Implement LUCs in the form of a notice to the Clear AFS General Plan and post signs at the
site. The notice would state that potential future movement of soil from the site must be done
in accordance with applicable regulatory guidelines, with ADEC review and approval.
Posted signs would identify the site as an ERP site and state that Clear AFS environmental
personnel should be contacted prior to performing any construction work at the site. Contact
information for the Clear AFS environmental personnel would be provided on the signs.
These LUCs would be kept in place as long as exceedances of the most stringent ADEC
cleanup levels remain on-site. |
Debra Caillouet |
| 3/6/2013 |
Cleanup Complete Determination Issued |
The Installation Development Plan (IDP), Clear Air Force Station, February 2013 has established Land Use Controls (LUCs) |
Debra Caillouet |
| 3/6/2013 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Debra Caillouet |
| 8/5/2015 |
Update or Other Action |
Site temporarily reassigned to program manager Vreeman |
Fred Vreeman |
| 4/13/2016 |
Document, Report, or Work plan Review - other |
DEC Approval of the Data Gap Investigation at Site SS022 and Remedial Investigation at Historical Locations SS-03 and SS-05, UFP-QAPP Work Plan - Site SS022 Building 51/Auto Hobby Shop.As part of the data gaps investigation (DGI), data will be collected outside of contaminant source areas and analyzed for total organic carbon, and grain size to develop input values for the Method 3 calculator to develop Alternative Cleanup Levels. Additionally, a land survey will be conducted to locate historical sample locations with chromium exceedances, and analytical samples will be collected to speciate chromium at these locations.
In conjunction with the DGI, a RI will be conducted to further evaluate lead contamination exceeding the DEC Method Two direct contact cleanup level in surface soils at historical sampling locations SS-03 and
SS-05. An area with a five foot radius around the samples will be excavated to one feet, then x-ray fluorescence in-situ field screening will be used to determine if there is remaining contamination. Analytical confirmation samples will be collected from the excavation base and sidewalls.
|
Monte Garroutte |
| 6/20/2016 |
Document, Report, or Work plan Review - other |
DEC approved a proposed Data Gaps investigation workplan addendum to sample two additional surface locations for methylene chloride. |
Monte Garroutte |
| 5/8/2017 |
CERCLA Removal Action Report |
DEC Approved the Data Gap Investigation at Site SS022 and Remedial Investigation at Historical Locations SS-03 and SS-05 Report, Site SS022 Building 51/Auto Hobby Shop. The objective of the DGI was to collect the necessary data to fill existing data gaps, including collecting site specific data to calculate ACLs; speciating chromium to determine the type of chromium present at the site (trivalent or hexavalent); and confirming historical detections of methylene chloride in surface soil. A site-specific hydraulic conductivity was calculated using the Hazen formula for input into the Method Three Calculator. The objective of the RI was to delineate two locations near the northwest (SS-03) and southeast (SS-05) corners of Building 51 that had historical lead contamination in surface soils above the ADEC Method Two direct contact level, and to subsequently remove those areas and perform confirmation sampling.
The report conclusions indicated that maximum remaining concentrations of DRO, selenium, PCE, TCE, and methylene chloride are below the method three ACLs. All previously identified lead and cadmium was removed to concentrations below Method Two cleanup levels. Hexavalent chromium was detected in one sample (SS-06) above the migration to groundwater cleanup level. However, the area was delineated to within two feet and there were no further detections across the site. Historical groundwater sampling has indicated that there is no hexavalent chromium groundwater contamination, therefore, it is evident that there is de minimis mass of hexavalent chromium at the site remaining above migration to groundwater CULs.
|
Monte Garroutte |
| 5/17/2018 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 72642 spills. |
Monte Garroutte |
| 4/28/2020 |
CERCLA ROD Approved |
On January 31, 2019, the Alaska Department of Environmental Conservation (DEC) approved the
Explanation of Significant Differences (ESD) for Site SS022, Building 51/Auto Hobby Shop, dated June
2018. The ESD was prepared to facilitate the increase in cleanup levels from the 2008 Method Two,
Tables B1 and B2, Under 40-inch Zone Migration to Groundwater cleanup levels to site-specific Method
Three alternative cleanup levels (ACLs) for all constituents except hexavalent chromium. The hexavalent
chromium cleanup level was changed to the 2016 Method Two, Table B1, Human Health cleanup level.
All residual contamination at Site SS022 is below the updated cleanup levels.The ESD was signed on April 28, 2020. |
Jamie McKellar |
| 5/12/2020 |
Institutional Control Record Removed |
On May 11, 2020, a Cleanup Complete Determination with no ICs was issued for Site SS022. All residual contamination at Site SS022 is below the updated cleanup levels in the approved Explanation of Significant Differences (ESD). |
Jamie McKellar |
