| Action Date |
Action |
Description |
DEC Staff |
| 5/26/1950 |
Update or Other Action |
HQ USARMY Alaska and HQ Alaska Air Command Memo
JOINT AGREENENT ON DIVISION OF RESPOrBIBILITIES IN THE OPERATION SEPARATE ARMY AND AIR FORCE INSTALLATIONS AT FORT RICHARDSON AND ELMENDORF AIR FORCE BASE. To delineate the responsibilitios of the U. S, Army, Alaska (USARAL) and the Alaskan Air Command (AAC), in connection with the establishment and operation of a separate Army installation atFort Richardson, Alaska, on or about 1 July 1950.
This agreement includes the following:
a. The extent of joint utilization cf existing services and facilities and the responsibility for their operation.
b. The extent and method of budgeting for cross-servicing of jointly-utilized facilities,
c. The definition of boundaries dividing the present Fort Richardson Military Reservation into two separate installations--Fort Richardson and Elmendorf Air Forco Base.
a. Letter, Headquarters, Alaskan Air Command, to Chief of Staff,
United States Air Force, Washington, D. C., Subject: "Transfer of Real
(3) Armed Ferces Food Service Scheol: Bldgs T-312 and T-310.
(4) Various terminal bulk fuel storage facilities pertaining tc the Quartermaster Section, Alaska General Depot.
(5) The buildings llsted in (1), (2), and (3), above, will be vacated as soon as suitable faci1ities become available at Fort Richardson.
Those are expected to be included in the FY 1950-FY 1952 construction programs. The use of the terminal bulk fuel storage and distribution facilities operated by the Alaska General Depot will be authorized by an agreement.
Toxic Chemical Storage Area
The area known as the AC Inert Storage Area, near junction of Light Road and Hill Road and approximately 9,000 feet north of Whitney Station, will continue to be used jointly by the Army and Air Force for storage of Army and Air Force Chemical Weaponse. |
Louis Howard |
| 8/1/1988 |
Update or Other Action |
Elmendorf Air Force Base (EAFB) ID NUMBER AK8570028649 RCRA FACILITY ASSESSMENT (RFA)
I. INTRODUCTION
The primary objective of the RCRA corrective action program is to clean up releases of hazardous waste or hazardous constituents that threaten human health or the environment. This
program applies to all operating, closed or closing RCRA facilities. EAFB has applied for a permit to continue to operate a hazardous waste storage unit at their facility. Section
3004(u) of the Resource Conservation and Recovery Act (RCRA) requires that permits issued to RCRA facilities address past and continuing releases of hazardous waste or constituents from all
solid waste management units (SWMU's) at the facility. The RFA is conducted to identify releases or potential releases requiring further investigation, by evaluating SWMU's and other areas of concern, for releases to all media, prior to permitting.
The RFA consists of a preliminary review (PR) and a visual site inspection (VSI). The PR focuses on evaluating existing information to determine the presence of the solid waste
management units (SWMU's) at EAFB. Both Environmental Protection Agency (EPA) and Alaska Department of Environmental Conservation (DEC) facility files were reviewed. Such facility
files included Part A and Part B applications, hazardous waste notifications, hazardous waste manifests, inspection reports prepared by EPA and/or DEC, in addition to all correspondence
with EAFB. Documents were also submitted by EAFB which detailed facility background and various SWMU's on-site; this information has been used throughout the RFA report for the identification of SWMU's and for research of past waste management practices at the facility.
Site S-3, Old DDT Drum Storage Site
a. Location: Building 64-580
b. Operation: Approximately 100 55-gallon drums of 20 percent DDT and other pesticides were stored at this site during the early 1960's, prior to off-site contract disposal.
c. Contamination Potential: EAFB reported that personnel were interviewed and had no knowledge of any spills or leakage at this location. No releases were visually evident. Since no releases have been documented at this site and since it is an enclosed building, no releases of hazardous constituents are expected.
d. Recommended Action: No further investigation is presently warranted at this location. |
Louis Howard |
| 8/3/1988 |
Update or Other Action |
CERCLA Source areas and corresponding RCRA SWMUs taken from the RCRA RFA (new number and old number) SS19 S-3 Old DDT Drum Storage - Bldg. 64-580. One-hundred 55 gallon drums of 20% DDT stored in early 1960s. No recorded spills. |
Louis Howard |
| 11/12/1991 |
Update or Other Action |
Jennifer Roberts Federal Facility Coordinator sent letter to Joe Williamson and Rich Howard pursuant to Section 9.1 of the Elmendorf Air Force Base Federal Facility Agreement (FFA). ADEC designates Jennifer Roberts as the Project Manager and Ron Klein as the Alternate Project Manager for all activities covered under the FFA. |
Jennifer Roberts |
| 12/30/1991 |
Update or Other Action |
EPA sent letter to AF Rich Howard and Joe Williamson. The notification will serve as an addendum to the previous letter of November 4, 1991 which designates the USEPA project managers pursuant to Section 9.1 of the Elmendorf Air Force Base (EAFB) Federal Facilities Agreement (FFA). Marcia Combes will serve a lead remedial project manager (RPM) for Basewide activities, as well as Operable Units (OUs) 2, 3, 5, 6, 7. Michele Poirier-McNeill will serve as lead RPM for OUs 1 and 4. In addition both RPMs will serve as an alternative RPM on OUs for which they are not the lead. For communication and correspondence purposes, the lead RPM should be the point of contact, and the alternate should be copied. |
Jennifer Roberts |
| 7/17/1992 |
Update or Other Action |
Action Memorandum for Operable Unit (OU) 4 interim removal action (IRA) Planning meeting at CH2MHILL's Offices to discuss the preliminary results of the limited field investigation (LFI) field work. Project managers to reach a consensus on which OU4 source areas would be appropriate for an Interim Remedial Action. SS18 Building 22-021 Pesticide storage building.
No contamination above action levels detected in lab samples. However, field observations at location SS18 B indicated that contamination may be present. A non-petroleum odor was noted and high headspace readings on the field monitoring instrument were observed. Consensus: No further action.
NOTE TO FILE: "Limited Field Investigation or "LFI" shall mean screening investigations of potential source areas with, inadequate data to determine whether these areas pose an
unacceptable risk to human health or the environment. Limited Field Investigations (LFIs) will be conducted at the old spill/disposal sites to identify whether or not these sites pose an unacceptable risk to public health from soil ingestion, dust inhalation, future agricultural use and crop uptale or direct contact. The potential for these areas to represent a
significant source to groundwater contamination will also be evaluated. Prior to performing LFI's a workplan will be developed identifying the Data Quality Objectives established based on the conceptual site model development.
As the objectives of the LFI are to ascertain the potential risk to human health from shallow soil contamination and/or the risk to human health from groundwater contamination resulting from the leaching of contaminants from these areas, the scope of the study is significantly less than that of an RI/FS. A sampling analysis plan "SAP" consisting of a field sampling plan (FSP) and QAPP will also be submitted as part of the workplan. At completion of the LFI investigation, a LFI report which contains the findings of the investigation shall be submitted to the agencies for review and comment.
A determination shall be made between the Project Managers to the disposition of each of the
sources. Based on report results a decision will be reached between the Project Managers on
what specific source areas in the operable unit (OU) require follow up action. The decision will be reflected in the administrative record." |
Jennifer Roberts |
| 9/1/1993 |
Update or Other Action |
Limited field investigation (LFI) conducted at the source area. During the LFI, surface and subsurface samples indicated dieldrin was present above EPA Region 10 Risk Based Concentrations (RBCs) and soil action levels in soils at depths from 0 to 3 feet. As a result of the LFI, it was determined that no further action would be warranted at the site contingent upon the successful implementation of an Expedited Response Action (ERA) to remove surface concentrations of dieldrin.
Several organochlorine pesticides were found in the soil samples adjacent to the western side of Bunker 64-580, with the most contaminated sample, E7-SS-08, located just outside the bunker doors. These surface soil samples contained low amounts
* (below comparison criteria) of gamma-BHC, 4,4'-DDD, 4,4'-DDT, and endrin.
One organochlorine pesticide, dieldrin, was detected above both the carcinogenic RBC (40 ,ug/kg) and the soil action level (43.8 /g/kg) in three surface soil samples (E7-SS-07, E7-SS-08), and E7-SS-09) at concentrations ranging from 122 to 629 ug/kg. These same criteria were also exceeded by dieldren at two of the soil borings for samples taken near the surface: 56.2 ,ug/kg at E7-SB-09 (0 to 2 feet depth); and 55.3 ug/kg (56.8 ug/kg in the duplicate sample) at E7-SB-10 (2.5 to 2.6 foot depth). PCBs were not detected in any of the soil samples.
NOTE TO FILE: 2009 18 AAC 75 migration to groundwater cleanup level for dieldrin is 0.0076 mg/kg or 7.6 ug/kg.
Other than the surficial dieldrin contamination, the soils at the site would not warrant further investigation. Therefore the EPA, ADEC, and Elmendorf AFB have agreed to recommend NFA for this site, contingent upon the successful completion of an Expedited Response Action to remove the contaminated surficial soils at the site. The ERA would likely consist of an initial surface soil excavation, limited in extent to the area in front of the bunker, and limited in depth to approximately 3 to 4 feet. As a part of the ERA, verification sampling would be performed during and/or after the initial excavation, to ensure that no dieldrin remains in the soil above action levels or RBCs.
The recommendation for NFA is based upon the assumption that, after the ERA is complete, the requirements of section 2.11.1 (Recommendation for No Further Action) will have been met, leaving the site with no dieldrin concentrations in excess of action levels or RBCs. |
Ray Burger |
| 2/22/1995 |
Meeting or Teleconference Held |
Restoration Advisory Board Meeting held to discuss review of progress to date
Restoration Advisory Board membership development. |
Ray Burger |
| 9/1/1995 |
Update or Other Action |
In 1995, soil was excavated from the west side of the bunker to one foot below grade. Samples taken at the base of the excavation indicated that dieldrin was still present in some areas of the initial excavation. These areas were further excavated an additional foot below grade. Following this, confirmation base and sidewall samples indicated that all dieldrin pesticide contaminated soils had been removed down to a risk based level of 136 ug/kg. NOTE, the 2002 18 AAC 75 Table B1 Method Two soil cleanup levels for under 40 inch zone lists a migration to groundwater cleanup level of 15 ug/kg or 0.015 mg/kg. These regulations were not in effect when the Record of Decision was signed. This residual level is comparable to a EPA residual risk of 5.1 x 10-6 assuming a residential use and exposure. Site was backfilled with clean granular fill material. |
Ray Burger |
| 11/30/1995 |
Update or Other Action |
USAF Larry Underbakke Memorandum for USEPA Marcia Combes Remedial Project manager and a separate memorandum for ADEC DOD Oversight Program Ray Burger RE: Closing of SS19. During our telephone conversation of 4 Oct 95 we agreed that SS19 will be closed based on site specific risk calculations. This risk was based on residential surface soil ingestion at 10 to the negative 5. The SS19 excavation will be back-filled with clean soil and the site graded to original ground level. SS19 will be documented in the Operable Unit 6 Record of Decision. Signed by Larry Underbakke, GS-12, Remedial Project Manager, Marcia Combes Remedial Project Manager and Ray Burger Remedial Project manager concurring. |
Ray Burger |
| 3/6/1996 |
Update or Other Action |
ADEC letter to USAF RE: OU 6 Draft Proposed Plan, Feb. 1996. GENERAL COMMENTS-Site SS19 needs to be presented more consistent with the other sites in the initial stages of the
report. The reader legitimately looks to the map, the site background list, and the contaminant tables to see what is covered in this proposed plan. Therefore, brief representation here is necessary.
The use of the term "unwanted compounds" is unnecessarily confusing. These same "unwanted compounds" are presented as "contaminants" in the tables and should be referred to as
"contaminants" throughout the text.
Page 3, Soils: a) In the discussion of SS19, state the level that the contaminant was removed to, what risk level this represents, and the thickness of the soil cover placed over the excavation.
b) The last paragraph states that the decision for no cleanup was based on contaminant levels being within state and federal standards and risk being "well within established health
guidelines." However, the decisions did not always meet this criteria. For example, DRO in soils at LF02 exceeded ACM and groundwater risk at LF03 is 1.1E-4, but no action is planned.
Replacing the word "and" with "or" and striking the word "well" would correct this. |
Ray Burger |
| 3/7/1996 |
Meeting or Teleconference Held |
Minutes from 7 March 1996 Conference Call. OU3 The project schedule will be completed today and distributed to the agencies Monday, March 11. Steve will be working to coordinate the delivery of the schedule to Tim Brincefield at EPA in Seattle.
Included in the cover letter will be a paragraph stating that we will be collecting additional soil at SS21 which will used by an AFCEE contractor to perform additional biotreatability studies. A spreadsheet was generated summarizing the health risk assessment work for SS19. Kim stated the spreadsheet did cover the additional information that AFCEE had requested.
The soil samples should be collected at SS21 early next week. We will need to shovel more snow and use the auger in order to collect the samples. We have enough soil in Austin to give to AFCEE; however, when we did the analysis on the "hotspot" it had less than one part per million PCBs. Larry noted that the National Guard was at that site last year, their soil was stockpiled at the "hotspot" and could have possibly disturbed the soil.
Steve commented he would like to have Kim and Larry review the final treatability work plan one last time. Per the EPA's request, we added some QA/QC and Health & Safety information, and also took
out the 1,000 parts per million test. Steve noted since there were substantial changes made to the plan, he would feel more comfortable sitting down to review the document with Kim and Larry next week. |
Ray Burger |
| 4/1/1996 |
Update or Other Action |
No Further Remedial Action Plan Bunker 64-580 Soil Removal. This NFRAP has been developed for the Air Force Center for Environmental Excellence (AFCEE), Brooks AFB, Texas, under the terms of Contract No. F41624-92-D-8006, Delivery Order No. 0020. Work under this contract was performed by Halliburton NUS and its subcontractor Harding Lawson Associates (HLA). Bunker 64-580, also known as the "Old DDT [dichlorodiphenyltrichloroethane] Drum Storage Area," was used during the early 1960s to temporarily store pesticides before disposal. The site is on Loop Road in the northwest corner of Elmendorf AFB, near the Fort Richardson boundary line.
Records indicate that at one time approximately 100 fifty five-gallon drums containing 20-percent DDT and other pesticides were stored in the building. No records indicate that spills or releases have occurred. This building is currently used by the Base Civil Engineering Squadron for equipment storage.
In accordance with the FFA, the USAF agreed to undertake a Limited Field Investigation (LFI) for the Old DDT Drum Storage Area, at Bunker 64-580 on Elmendorf AFB. This site was identified in the FFA as CERCLA Source Area SS19 of Operable Unit 07. The LFI was conducted at this site in 1993 by Radian Corp and a report documenting the LFI activities was prepared.
During the LFI, soil samples were collected at Bunker 64-580. Laboratory analyses of the samples indicated dieldrin was present in site soil at concentrations ranging from 55 to 629 micrograms per kilogram (ug/kg), at depths ranging from 0 to 3 feet below ground surface. The LFI calculated, in accordance with the Resource Conservation and Recovery Act (RCRA) Subpart S, a soil action level of 43.8 ug/kg for dieldrin, and concluded that dieldrin is the only contaminant at the site found at concentrations exceeding potential soil action levels. NOTE: January 2007 18 AAC 75.341 Table B1 Method Two Soil Cleanup Levels Table lists the cleanup level for Under 40 inch Zone for Dieldrin at 0.015 mg/kg or 15 ug/kg. 2009 18 AAC 75 levels are 0.0076 mg/kg or 7.6 ug/kg.
Initial excavation and sampling activities were completed on June 15, 1995. Laboratory results discussed in section 4.2.1 of this NFRAP document indicated that dieldrin concentrations exceeding 43.8 !ig/kg still remained at three of the soil confirmation sampling points. Two of these, SL07 (46.2 ug/kg) and SL09 (55.6 ug/kg), had concentrations of dieldrin slightly above the soil action level, but sampling point SL05 (collocation SL12-187 ug/kg) had concentrations several times higher at 317 ug/kg.
The AFCEE, the EPA, and the ADEC discussed the remedial actions to date, and developed a plan for final soil removal. The AFCEE defined the technical parameters for the final soil removal to Halliburton NUS, as indicated in the August 11, 1995, memorandum from the AFCEE to Halliburton NUS. Additional soil was then excavated and sampled at Bunker 64-580. Following excavation activities, (confirmation) soil Sample SL13 (135 ug/kg) was collected at the base of the excavation at previous sample location SL05 (collocation SL12). Sample DW02 was collected from the drum of decontamination water, and Samples DS22 (6.2 ug/kg) and DS23 (116 ug/kg) were collected from the drummed soil. All samples were submitted for laboratory analyses.
On October 4, 1995, the AFCEE, the EPA, and the ADEC discussed the requirements for further remedial action at Bunker 64-580. The AFCEE presented a risk assessment performed by Radian Corp., and the EPA and the ADEC agreed that no further remedial action was required. |
Jennifer Roberts |
| 8/27/1996 |
Update or Other Action |
ADEC letter to USAF RE: OU 6 Draft ROD July 1996. GENERAL COMMENTS - In all of the discussions of Contaminants of Concern (COCs) the statement is made that some contaminants were not included as COCs because: "(1) their presence was determined to be anomalous, or in the case of groundwater, solely related to smear zone contamination". The second half of this is confusing. It appears to refer to soil contamination found in the smear zone that is to be treated as part of the groundwater remediation. Please clarify.
The cleanup goals stated in the Record of Decision for soil contaminants are different from the cleanup goals stated in the Proposed Plan. Changes in cleanup goals need to be justified and agreed upon by all three parties. Changes between the proposed plan and the ROD need to be adequately described in the ROD.
In the tables summarizing soil analytical results for each section, the "ACM" for toluene, ethylbenzene and xylene are all individually listed as 50 mg/kg. These should be footnoted to indicate that this is a total BTEX level.
Section 1.3. Source Area SS19: Stating that "all pesticide contaminated soils had been removed" is not accurate. It should be reported that pesticide contaminated soils were removed down to a risk based level of....and a cover of clean fill was applied.
|
Ray Burger |
| 1/27/1997 |
Site Closure Approved |
Record of Decision (ROD) memorialized a 1995 soil removal of dieldrin contamination and subsequent sampling showed levels were within an acceptable residential use and exposure range. NFA is required. |
Louis Howard |
| 1/27/1997 |
Record of Decision |
ROD memorializes no further action (NFA) for SS19 a bunker in the extreme northeast (NE) corner of the base. LFI conducted in 1993 soils were collected and analyzed for pesticides with Dieldrin surface contamination detected as a result. NFA would be appropriate if a surface removal action was conducted. 1995 removal action to 2 foot in depth and confirmation sampling showed residual risk to Dieldrin was within an acceptable range (5.1E-06) 136 ug/kg assuming residential use and exposure. Site was backfilled with clean fill material and NFA was finalized.
NOTE to file: 2009 18 AAC 75 Table B1 Method Two Soil Cleanup Levels show dieldrin migration to groundwater levels are at 0.0076 mg/kg or 7.6 ug/kg. Direct Contact levels Under 40 inch zone: 0.32 mg/kg or 320 ug/kg. EPA SSL protection for migration to groundwater levels: 0.00009 mg/kg or 0.09 ug/kg. Residential soil screening levels: 0.03 mg/kg or 30 ug/kg. Industrial soil screening levels: 0.11 mg/kg or 110 ug/kg (Regional Screening Levels (Formerly PRGs) Region 9 RSL tables ).
0.04 mg/kg or 400 ug/kg ingestion, dermal 13 mg/kg (13,000 ug/kg), inhalation 720 mg/kg (720,000 ug/kg). |
Louis Howard |
| 2/11/1997 |
Site Added to Database |
Site added |
Louis Howard |
| 2/11/1997 |
Update or Other Action |
UPD action added 02/11/1997. Air Force Relative Risk Evaluation Worksheet dated 8/16/95 indicated RDRA is the current phase. |
Louis Howard |
| 4/21/1998 |
Site Ranked Using the AHRM |
Ranking action added now because it was not added when the site was originally ranked. |
Louis Howard |
| 7/6/2011 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 73745 name: auto-generated pm edit Elmendorf OU6 SS19 DDT Drum Storage |
Louis Howard |
