Action Date |
Action |
Description |
DEC Staff |
12/7/1998 |
Update or Other Action |
Reviewed draft Field Investigation Report on investigation conducted summer 1998. Identified data gap for sampling under large drum pile; recommended sampling when drums are removed. |
Tamar Stephens |
12/13/1999 |
Site Added to Database |
Lead contamination in one isolated location, minor DRO contamination documented, about 20 compressed gas cylinders, and a few hundred drums in a pile. |
Tamar Stephens |
12/20/2002 |
Update or Other Action |
Reviewed Removal Action Report for a removal action conducted in summer 2001. Corps of Engineers removed 229 55-gallon drums, two 100-gallon drums, 5 compressed gas cylinders, and 24 Blazo containers. Field testing of one drum identified chlorinated hydrocarbons; drum was overpacked and left on site. High levels of DRO under drum pile ranging from 16,800 mg/kg to 70,500 mg/kg. |
Tamar Stephens |
9/30/2003 |
Update or Other Action |
Staff Tamar Stephens developed DSMOA work plan with Corps of Engineers project manager. Intent is to develop decision document and work plan for site cleanup during fiscal year 2005. |
Tamar Stephens |
12/16/2005 |
Update or Other Action |
Staff Tamar Stephens held telephone call with Corps of Engineers project manager. No progress on site due to lack of funding. |
Tamar Stephens |
3/20/2007 |
Site Ranked Using the AHRM |
Drum storage area ranked using AHRM. Ranking did not include housing pit with lead contamination (separate source area) |
Tamar Stephens |
4/1/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Tamar Stephens |
7/14/2008 |
Cleanup Plan Approved |
Approved work plan for removal of an over-packed drum with unidentified chlorinated contents; excavation and removal of lead contaminated soil, if present, to the extent removal can be accomplished without compromising historical elements of the site; and removal of petroleum-contaminated soil from a former drum location. Due to historical nature of site, an archeologist will be on site, and all actions must be approved by archaeologist to protect historical integrity of site. |
Tamar Stephens |
9/16/2008 |
Update or Other Action |
Reviewed and sent comments on draft report American River Formerly Used Defense Site Remedial Action Report, dated August, 2008. DEC received this report electronically on September 10, 2008. |
Tamar Stephens |
10/1/2008 |
Final Cleanup Report Reviewed |
Reviewed and approved final report: American River Formerly Used Defense Site Remedial Action Report (September, 2008). DEC received this report electronically on September 30, 2008.
Previous investigation of this site identified two areas of concern. Area A was suspected to have lead-contaminated soil in a 25 ft x 40 ft bermed pit. Area B is the location of a former drum pile. The report documents that no lead was detected in soil above the cleanup level of 400 mg/kg; therefore no soil was removed. No petroleum contamination was found above Method 2 cleanup levels in the former drum pile area, and that the site has fully revegetated since the 1999 removal action. The overpacked drum could not be located. Review of this report shows that no further cleanup is needed at this site. The site has been adequately characterized for soil contamination, and there is no evidence of the presence of remaining contamination at concentrations that would require cleanup under the site cleanup rules in 18 AAC 75.325-390.
|
Tamar Stephens |
3/27/2009 |
Record of Decision |
Decision document titled "Containerized, Hazardous, Toxic, or Radiologic Waste (CON/HTRW) Project Closure Decision and No Department of Defense Action Indicated for American River Air Base, Seward Peninsula, Alaska" was signed by Lt. Col. James R. Stone, Corps of Engineers District Commander on March 10, 2009, and by John Halverson, DEC Environmental Program Manager on March 27, 2009. The reports documents that all containerized waste has been removed from the site and that no contamination remains above cleanup levels. Field screening and analytical samples from 2008 removal action did not identify any soil contamination above method 2 direct contact cleanup levels. |
Tamar Stephens |
12/12/2011 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 74079 Drum Storage Area. |
Tamar Stephens |
12/13/2011 |
Cleanup Complete Determination Issued |
Decision document titled "Containerized, Hazardous, Toxic, or Radiologic Waste (CON/HTRW) Project Closure Decision and No Department of Defense Action Indicated for American River Air Base, Seward Peninsula, Alaska" was signed by Lt. Col. James R. Stone, Corps of Engineers District Commander on March 10, 2009, and by John Halverson, DEC Environmental Program Manager on March 27, 2009. The reports documents that all containerized waste has been removed from the site and that no contamination remains above cleanup levels. Field screening and analytical samples from 2008 removal action did not identify any soil contamination above method 2 direct contact cleanup levels. |
Tamar Stephens |
12/13/2011 |
Institutional Control Record Removed |
Institutional Controls have been removed. |
Tamar Stephens |