| Action Date |
Action |
Description |
DEC Staff |
| 10/21/2002 |
Update or Other Action |
Jennifer Roberts (DEC Federal Facilities) sent a letter to Joe Williamson dissolving the State Elmendorf Environmental Restoration Agreement. The Alaska Department of Environmental Conservation (DEC) has reviewed the issue of abolishing the State Elmendorf Environmental Restoration Agreement (SERA) per your recommendation. Elmendorf Air Force Base and DEC entered into the SERA in 1992. The agreement was developed as a tool to bring the Base into compliance with Alaska's regulations addressing underground storage tanks, oil and other hazardous substance releases and solid waste.
Since that time, Elmendorf has made significant progress in investigating and cleaning up historic contamination problems. Many of the sites covered by the SERA have been successfully cleaned up and closed. Cleanup is underway at the remaining sites. Additionally, Alaska has amended the regulations addressing fuel storage tanks, oil and other hazardous substance spills and solid waste. We concur with you that the SERA is no longer a necessary or beneficial. This letter serves as notice that DEC will end oversight on environmental work at Elmendorf by using the SERA. Instead, it is understood that the sites and programs formerly addressed by SERA: solid waste, underground storage tanks (UST), and oil and other hazardous substance discharges will be addressed in accordance with 18 AAC 60, 18 AAC 78 and 18 AAC 75. |
Jennifer Roberts |
| 2/12/2004 |
Update or Other Action |
Harry Young took down a spill report from Elmendorf for the Product Recovery Tank at the West Ramp Pumphouse Bldg. 13196 Fairchild Avenue tanks 736 & 737. 8,814 gallons were released. Spill# 04239904301 LC 14117360. Surge Tank overfill alarm did not activate system shutdown at 75% full causing fuel to overflow. Cleanup actions initiated: absorbent boom, vacuum truck, loaders to remove fuel contaminated snow and contaminated soil to be removed by contract. |
Louis Howard |
| 2/27/2004 |
Update or Other Action |
The JP-8 release at WRHFF occurred primarily on snow-covered, frozen ground. Consequently, a pool of JP-8 accumulated at the area of initial release in the parking area along the east side of Building 13196. NOTE TO FILE: Naphthalene is a white solid or a liquid that occurs naturally in fossil fuels such as coal and crude oil and is best known as the primary ingredient of mothballs. It is extracted from these sources for other uses including jet fuel (Average JP-8 composition-paraffins 60%, naphthenes 20%, aromatics 20%, sulfur 500ppm). Antioxidants
These are added to improve fuel storage stability and inhibit formation of peroxides
and hydroperoxides, that chemically attack sealants in aircraft fuel systems. The
current additive in use is a hindered phenol, added to fuel up to 24 mg/l.
Fuel System Icing Inhibitor (FSII)-Military aircraft do not normally use fuel heaters. The FSII is added to prevent water in the fuel from freezing and forming ice crystals that can block fuel filters. The FSII used in F-34 is diethyleneglycol monomethylether (DiEGME) added at a concentration in the range 0.1-0.15%. DiEGME has the extra advantage of acting as a biocide, inhibiting growth of sulphate reducing bacteria and fungi.
Static Dissipaters-The generation of a static charge while handling aviation fuel is a potential hazard. Fuel has a low conductivity, so a static dissipater is added to increase the conductivity to between 200 and 600 pS/m. The additive used is DuPont Stadis 450 with typical
concentrations between 0.5 to 2.0 mg/l.
Corrosion Inhibitor / Lubricity Improver-Corrosion inhibitors were originally des igned to protect commercial pipelines, they have since found use as both corrosion inhibitors and as an effective lubricity improving additive in jet fuel. Currently they are added to F-34 in concentrations from 6 to 31.5 mg/l. These additives are designed to prevent wear in fuel pumps. They are typically long chain fatty acids like dilinoleic acid, or their derivatives.
The +100 additive for JP-8: Antioxidant-Butylated Hydroxy Toluene, metal deactivator-N,N'-disalicylidene-1,2-propanediamine, aromatic solvent-Alkylbenzenes, hydroaromatics, solvent-naphthalene and 1,2,4-trimethylbenzene.
Before any snow or soil removal occurred, a total of 1,200 gallons of free product was suctioned into a tanker truck for later disposal. Within the first 48 hours following the spill approximately 745 cy of contaminated snow was loaded into trucks and transported directly to Emerald Alaska Inc.,(Emerald) for separation and disposal.
Contaminated snow was initially stockpiled in a lined, bermed area constructed on the first day following the spill. Once it was realized that the volume of snow would exceed any reasonable storage capacity on site, it was decided to load snow immediately from the spill area and haul it directly to Emerald. A large containment system was constructed at Emerald for snow storage. Snow treatment was performed at Emerald directly from their on-site stockpile. A total of 62 truckloads of snow were hauled from the site. The interim snow storage area at the WRHFF was demobilized as part of the site restoration activities. |
Louis Howard |
| 3/2/2004 |
Update or Other Action |
Soil removal using two hydraulic excavators was guided by field screening with a PID. Excavation continued until PID readings were below 10 ppm in the excavation sidewalls and
bottom with the exception of the buried utility corridor and the area immediately adjacent to the pump station along the east side of Building 13196. A total of 2,848 cy of contaminated soil was removed from the WRHFF spill area over a 13 day period. The excavated area had an irregular shape and ranged from 4 to 5 feet in depth depending on contamination.
Significant contamination was encountered during soil removal within the utility corridor, which
runs from the east side of Building 13196 through the access road and eventually across to the
east side of Fairchild Avenue. Free product seeps were observed where the corridor encounters a
low point in the access road. The loose, unfrozen bedding material in the utility corridor likely acted as a conduit for fuel migration from the spill source down towards Fairchild Avenue.
Because the corridor crosses the drainage ditch that surrounds the area of the initial release, spilled fuel was quickly absorbed into the more porous corridor bedding material. Excavation along the corridor was partially executed by hand to avoid damaging any buried utilities, which consist of 3 fuel lines, 2 power conduits and 1 communication-line conduit. Significant contamination was also found in the access road, though PID readings along the southern limit of the excavation were nearly non-detect, indicating that fuel did not migrate completely through the roadbed material. The POL-contaminated soil was transported directly to ASR for thermal desorption treatment |
Louis Howard |
| 3/3/2004 |
Update or Other Action |
Update from Air Force Mr. John Mahaffey: The Air Force has concluded soil excavation at the site. A short summary of the activities to date are included below. We will notify the department of any significant activities that occur between now and the time we begin any additional excavations or initiate back filling in the area. The first site/liner inspection is scheduled for 3 Mar 04. Inspections will be conducted at least once a week and will be conducted more frequently if substantial precipitation is received or temperatures remain above freezing for longer than 48 hrs.
West Ramp Hydrant Fuel Facility (WRHFF) Spill Response. Approximately 8,814 gallons of JP-8 were spilled from a product recovery tank at the WRHFF during the evening of 11 Feb 04. As of 03 March 04, about 1,600 gallons of the released fuel have been recovered from surface and subsurface areas, 580 cubic yards (cy) of fuel contaminated snow have been removed to an off-base contractor treatment facility for treatment and energy recovery, and approximately 4,272 tons of fuel impacted soil have been excavated and transported to an off-base contractor facility for thermal treatment and disposal. Additionally, four soil borings were advanced to 25 feet bgs to assess potential groundwater impacts. No groundwater impacts were identified.
Excavation activities have been completed. The excavated areas have been left open and covered with welded liners to prevent additional contamination of the area by storm water. The excavations will be monitored and accumulated storm water will be removed. The excavations will remain open until after breakup and the subsurface soils have thawed in order that additional migration of fuel, if any, may be detected and addressed. |
Louis Howard |
| 5/4/2004 |
Site Visit |
John Brown from the Prevention and Emergency Response Program and Louis Howard from the Contaminated Sites Program conducted a site visit at the Elmendorf Recover tank spill site. Staff came to the agreement that it was time to transfer the site from emergency response program to the contaminated sites program. It looks like they have done about as much as they can do as far as excavation of contaminated soil without compromising the integrity of the building foundation and the utilities that exist at the site. |
Louis Howard |
| 5/7/2004 |
Site Added to Database |
DRO. |
Sarah Cunningham |
| 5/17/2004 |
Spill Transferred from Prevention Preparedness and Response Program |
Case transfer notification letter sent from PERP to Air Force regarding the spill associated with the West Ramp Hydrant Fueling Facility.
RE: Notification of Intra-Department Project Management Transfer, Product Recovery Tank Spill at pump house bldg. 13196. ADEC Spill # 04239904301.
The Department is notifying Elmendorf Air Force Base (EAFB) of transfer of project management responsibility from the Prevention and Emergency Response Program (PERP) to the Contaminated Sites (CS) Program. Louis Howard will be the new project manager for the long-term remediation efforts at the site.
The Department is aware of the following spill response actions that have been implemented at your site by EAFB and Weston Solutions, Incorporated:
Site characterization by EAFB contractor, Weston Solutions, Incorporated which included assisting Air Force response team in identifying the extent of spill and activities required for the continued containment. Weston assisted Air Force team with recovering free liquid estimated to be 90% JP-8 and its proper disposal. Estimated that 1600 gallons of the released 8814 gallons of JP-8 were recovered from surface and subsurface areas.
Removal and treatment of contaminated snow (580 cubic yards) and soils (4272 tons) cross and down gradient of the spill source which included cleanup actions to mitigate fuel seeps which had encroached into previously excavated soils in the existing ditch.
Identified groundwater flow direction and depths within the vicinity of spill. Four soil borings were advanced to 25 feet below ground surface (bgs) to assess potential groundwater impacts of which none were identified.
Finally, excavation activities were completed and left open and covered with liners to prevent additional contamination of the area by storm water. These excavations were monitored into May and accumulated storm water and fuel were removed. On May 4th, ADEC Prevention and Emergency Response responder, John Brown and Contaminated Site Remediation Program Louis Howard inspected the site along with John Mahaffey, EAFB. Consensus by all three to transfer the site to ADEC, CSRP Louis Howard from ADEC, PERP project manager Wesser.
Remaining contamination at this site will be detailed to the Department (Louis Howard) in a soil confirmation sampling report prepared on your behalf by, Weston Solutions Incorporated. This report will indicate the amount of contamination remaining at the site. This type of environmental impact will require longer-term site clean up action and it is for this reason that your project is being transferred to the CS. In the event you need to speak with a Department representative concerning this site, you should contact Louis Howard at phone number, 907-269-7552.
Please note that if contamination exceeding regulatory soil and groundwater cleanup standards is identified on the site in the future, additional work may be necessary. |
Louis Howard |
| 6/16/2004 |
Update or Other Action |
Sixteen confirmation soil samples were collected from the sidewalls and bottom of the excavation for laboratory analysis. The samples were analyzed for GRO, BTEX compounds, DRO, RRO, and PAH’s. Six of the sixteen sample locations returned with DRO concentrations exceeding the ADEC cleanup level of 300 mg/kg. One of these samples also exceeded the ADEC cleanup level of 250 mg/kg for GRO and 5.5 mg/kg for ethylbenzene. Other samples contained elevated levels of GRO, toluene, ethylbenzene, and xylene but not exceeding cleanup levels. Of the six samples with results above cleanup levels, four were in the immediate vicinity of the release. The remaining two were in ditches where fuel moved away from the point of release |
Louis Howard |
| 12/14/2004 |
Document, Report, or Work plan Review - other |
Staff reviewed a draft technical memorandum report for the West Ramp Hydrant Fueling Facility for contaminated soil removal. ADEC requests the final version of the documents provided by the 3 CES/CEVQ be provided in both paper form and electronic form (ADOBE ACROBAT PDF or MS WORD DOC) on CD-ROM for ADEC’s records. Also, ADEC requests that the site location be more specific and include a street/building number and street name (e.g. Fairchild Avenue) and at least one of the following: 1) Quadrangle, Section, Township Range and Meridian, 2) Latitude and Longitude expressed in Degrees, Minutes, Seconds (decimal degrees).
Section 3.2 Groundwater Sampling Results Page 3-1 - The text states that due to the absence of any sheen or free product associated with JP-8 released at Building 13196 West Ramp Hydrant Fueling Facility (WRHF) suggests the groundwater was not affected by the spill at the time of the sampling, five days after the spill event. However, ADEC does not concur and will require groundwater monitoring since soil above the migration to groundwater cleanup level for petroleum constituents (diesel range organics, gasoline range organics, and ethylbenzene) are still present in the soil after the soil removal was conducted.
Section 4.0 Conclusions and Recommendations Page 4-1 - ADEC concurs with the statements that the soil contamination with the release at Building 13196 WRHF Facility has been removed to the maximum extent practicable. Excavation work deeper than five (5) feet could not be conducted next to the building without undue structural damage to the foundation. Additionally, excavation of contaminated soil along the utility corridor was limited to avoid potential damage to three (3) buried fuel lines.
ADEC concurs that the groundwater monitoring should be conducted at the site to ensure that any possible impact from the spill can be assessed. The text states that the presumptive remedy for groundwater at spill sites is monitored natural attenuation. This statement is true; however, the Department wishes to clarify this statement.
The presumptive remedy for new POL releases that impact groundwater in the shallow, unconfined aquifer and for which Elmendorf Air Force Base utilizes monitored natural attenuation as a part of the remedial action will require the use of institutional controls and associated long term monitoring. Free product will be recovered to the maximum extent practicable by skimming, use of sorbent materials, or other technologies approved by ADEC. (NOTE to File: “free product” means a concentration of a hazardous substance that is present as a nonaqueous phase liquid; for purposes of this paragraph, a “nonaqueous phase liquid” is a liquid that is not dissolved in water.) Thus far, the Air Force has not detected free product associated with the WRHF Facility JP-8 release.
Appendix A - ADEC requests disposal certificates or at a minimum copies of the tare receipts of contaminated material and laboratory confirmation samples taken after treatment was conducted be included in the final version of the document. |
Louis Howard |
| 2/8/2007 |
Exposure Tracking Model Ranking |
|
Louis Howard |
| 5/20/2009 |
Update or Other Action |
Draft groundwater monitoring report received. Groundwater monitoring well WRHFF-01 was sampled and analyzed by an analytical laboratory for GRO, DRO, and BTEX compounds. None of these constituents were detected above cleanup levels in the sample. Monitoring well WRHFF-01 should continue to be sampled annually for GRO, DRO, and BTEX compounds. Once groundwater contaminant concentrations are below cleanup levels for two consecutive years, soil samples should be collected to determine if all vadose zone soil has been remediated. Once all groundwater and vadose zone soil contaminant concentrations are below cleanup levels, this site should be considered for “Cleanup Complete” status. |
Louis Howard |
| 4/15/2010 |
Update or Other Action |
2009 Annual Report for monitoring of compliance program sites received. On February 12, 2004, a failure in system components at the WRHFF at Elmendorf AFB resulted in a release of approximately 9,000 gallons of jet fuel (JP-8) onto a snow covered, frozen surface. The release occurred at the pump station overfill tank on the east side of Building 13196 and impacted a surface area of roughly 0.52 acres.
The initial spill affected a level parking area partially bordered by a ditch. However, the volume of the spill caused the released fuel to flow from the immediate spill area into a lower ditch line along a gravel road which accesses the east side of the facility from Fairchild Avenue. Fuel was also rapidly absorbed by loose bedding material in a buried utility corridor. Free product continued down the ditch line along the edge of the access road and collected at the bottom of a hill where the access road meets Fairchild Avenue. Snow, meltwater, and soil were all impacted and required removal and disposal.
Groundwater monitoring well WRHFF-01 was sampled using the approved procedures provided
in the 2008 Final Work Plan (USAF, 2008b). The sample was analyzed by an analytical
laboratory for GRO, DRO, and BTEX compounds. None of these constituents were detected
above laboratory MDLs.
Following the POL-Contaminated Snow and Soil Removal in 2004, concentrations of DRO, GRO, and ethylbenzene still exceeded cleanup levels in soil at the WRHFF spill site. In 2008 and 2009, groundwater samples from a newly installed groundwater monitoring well (WRHFF-01) did not have concentrations of any of these contaminants above their respective cleanup levels.
It is recommended that soil samples be collected in 2015 (if funding is available) to determine if all vadose zone soil has been remediated to below cleanup levels. Once all groundwater and
vadose zone soil contaminant concentrations are below cleanup levels, this site should be considered for “Cleanup Complete” status. Until soil samples are collected, monitoring well
WRHFF-01 should continue to be sampled annually for DRO, GRO, and BTEX compounds. |
Louis Howard |
| 7/9/2010 |
Document, Report, or Work plan Review - other |
Staff reviewed and commented on the 2009 Annual Report Monitoring of Compliance Program Sites, Elmendorf Air Force Base (EAFB) dated June 2010.
Worksheet #30 Page 57 of 67
West Ramp Hydrant Fueling Facility (WRHFF) JP-8 release occurred at the pump station overfill tank on the east side of Building 13196 and impacted a surface area of roughly 0.52 acres. Unless other information is available which shows that the WRHFF historically handled AVGAS or leaded gasoline, it does not appear that analyzing for EDB and 1,2-DCA in soil or groundwater appear warranted at WRHFF. |
Louis Howard |
| 3/16/2011 |
Update or Other Action |
Draft Annual Report Monitoring of Compliance Restoration Program Sites received. Groundwater monitoring well WRHFF-01 was sampled. The sample was analyzed by an analytical laboratory for GRO, DRO, and BTEX compounds. None of these constituents were detected above laboratory MDLs.
Conclusions
Following the POL-Contaminated Snow and Soil Removal in 2004, concentrations of DRO, GRO, and ethylbenzene still exceeded cleanup levels in soil at the WRHFF spill site. In 2008 through 2010, groundwater samples from groundwater monitoring well WRHFF-01 did not have concentrations of any of these contaminants above their respective cleanup levels.
Closure soil samples are programmed to be collected in 2011 to determine if all vadose zone soil
has been remediated to below cleanup levels. If soil sample results are below cleanup levels, this site should be considered for "Cleanup Complete" status. If soil sample results are not below cleanup levels, monitoring well WRHFF-01 should continue to be sampled annually for DRO,
GRO, and BTEX compounds. |
Louis Howard |
| 7/15/2011 |
Update or Other Action |
Draft Work Plan Environmental Remedial Action-Operations & LTM & Maintenance received.
Closure soil samples will be collected at three CRP sites (ST401, ST538, & West Ramp Hydrant Fueling Facility [WRHFF]) to determine if contaminant concentrations in soil have been naturally attenuated to below ADEC cleanup levels by drilling soil borings & collecting soil samples from each boring. In addition, soil borings will be drilled & samples collected from three CRP sites that underwent closure soil sampling in 2010 to obtain additional TOC data (ST516, ST529, & ST600).
Soil borings will be completed using direct-push technology to facilitate near real-time soil screening with a photo ionization detector (PID) & sampling.
On February 12, 2004, a failure in system components at the WRHFF at JBER-Elmendorf resulted in a release of approximately 9,000 gallons of JP-8 onto a snow covered, frozen surface. The release occurred at the pump station overfill tank on the east side of Building 13196 and impacted a surface area of roughly 0.52 acres. The initial spill affected a level parking area partially bordered by a ditch. However, the volume of the spill caused the released fuel to flow from the immediate spill area into a lower ditch line along a gravel road which accesses the east side of the facility from Fairchild Avenue. Fuel was also rapidly absorbed by loose bedding material in a buried utility corridor. Free product continued down the ditch line along the edge of the access road and collected at the bottom of a hill where the access road meets Fairchild Avenue. Snow, meltwater, and soil were all impacted and required removal and disposal.
Annual Compliance Monitoring: During the 2008 Annual Compliance Monitoring, a new
groundwater monitoring well, WRHFF-01, was installed at the site. The well was then sampled in 2008 through 2010 for GRO, DRO, and BTEX compounds. None of these constituents were detected above cleanup levels in the samples
Field activities at the WRHFF will consist of direct-push technology to install six soil borings. Two in-source soil borings will be placed near the locations known to have the highest concentration of remaining contaminants in the vadose zone that exceeded ADEC Method 2 cleanup levels. An additional four borings will be placed outside the contaminated zone to collect samples for TOC analysis. Soil borings will be advanced to fifteen feet bgs. If field screen results indicate that contamination extends beyond 15 feet bgs, the boring will continue to be advanced deeper.
Soil from the two in-source soil borings will be screened at every 5-foot interval using a PID. Samples for laboratory analysis will be collected from the three intervals that exhibit the highest field-screen readings. Each soil sample will be collected for laboratory analysis for DRO, GRO, and BTEX compounds. The four background borings will be sampled for TOC, DRO, GRO, and BTEX compounds from the same intervals as the in-source boring samples.
The contaminants that are tracked in the GW plumes at these sites are listed below.
-Site ST401 - GRO, BTEX, DRO
-Site ST402 - GRO, BTEX, DRO, residual range organics (RRO), volatile organic compounds (VOC), ethylene dibromide (EDB)
-Site ST403 - GRO, BTEX, DRO, RRO, VOC
-Site ST421 - GRO, BTEX, DRO
-Site ST422 - GRO, BTEX, DRO
-Site ST426 - DRO
-Site ST507 - GRO, BTEX, DRO
-Site ST510 - GRO, BTEX, DRO
-Site ST516 - GRO, BTEX, DRO, VOC
-Site ST526 - VOC
-Site ST529 - DRO, VOC
-Site ST534 - DRO
-Site ST538 - DRO
-Site ST600 - GRO, BTEX, VOC, Polycyclic aromatic hydrocarbons (PAH)
-Site ST702 - GRO, BTEX, DRO
-Site ST703 - DRO
-Site ST805/806 - DRO
-Site Taxiway-N - GRO, BTEX, DRO
-Site West Ramp Hydrant Fueling Facility (WRHFF) - GRO, BTEX, DRO
Closure soil samples will be collected at three CRP sites (ST401, ST538, and WRHFF) to determine if contaminant concentrations in soil have been naturally attenuated to below Alaska Department of Environmental Conservation (ADEC) cleanup levels by drilling soil borings and collecting soil samples from each boring. In addition, soil borings will be drilled and samples collected from three CRP sites that underwent closure soil sampling in 2010 to obtain additional total organic carbon (TOC) data (ST516, ST529, and ST600). The contaminants that are tracked in the groundwater plumes at these sites are listed below.
-Site ST401 - GRO, BTEX, DRO, TOC, PAH
-Site ST538 - GRO, BTEX, DRO, VOC, TOC
-Site WRHFF - GRO, BTEX, DRO, TOC
-Site ST516 - GRO, BTEX, DRO, VOC, TOC
-Site ST529 - GRO, BTEX, DRO, TOC
-Site ST600 - GRO, VOC, TOC
Soil borings will be completed using direct-push technology to facilitate near real-time soil screening with a photoionization detector (PID) and analytical soil sampling. |
Louis Howard |
| 4/4/2012 |
Update or Other Action |
Closure Sampling Summary Report received. The purpose of this project was to collect soil samples at the CRP WRHFF Spill Site to determine if soil contamination has been remediated to below Alaska Department of Environmental Conservation (ADEC) Method Two cleanup levels. Background samples for Total Organic Carbon (TOC) were also collected to obtain additional data that could be used to support an ADEC Method Three determination if Method Two cleanup levels were not met. If contamination is found to be below cleanup levels at this site, closure of the sites will be requested from ADEC. Soil borings were completed using direct-push technology to facilitate sample collection at depths known to have previously contained the highest concentration of contaminants.
The in-source soil borings were advanced to 15 feet below ground surface (bgs) at the locations
shown in Figure 3.1. Soil from these borings were screened with a PID at a minimum of 2.5-foot
intervals to a total depth of 15 feet bgs. Samples for laboratory analysis were collected from:
(1) 5 to 7.5 foot bgs; (2) 7.5 to 10 foot bgs; and (3) 10 to 12.5 (per the Work Plan, since field screening did not indicate contamination at either the 10 to 12.5 foot or the 12.5 to 15 foot bgs interval, the deepest samples were collected from the 10 to 12.5 foot bgs interval). The samples were collected for laboratory analysis of GRO, DRO, and BTEX compounds. As shown in
Table 3.1, there were no exceedences of Method Two Cleanup levels in any sample.
Soil samples were collected from four background locations shown on Figure 3.1. Since field
screening of the in-source borings with a PID indicated that contamination did extend to
groundwater, samples collected from the four background borings were collected at (1) the
deepest assumed contaminated vadose soil stratum (5 to 6 feet bgs) and 5 feet below the
contaminated soil stratum (10 to 11 feet bgs) in accordance with the ADEC Technical Memorandum 08-002 guidance for analysis of TOC (ADEC, 2008). The samples were analyzed for the parameters required to determine ADEC Method Three alternative migration to groundwater cleanup levels. However, the analytical results from the in-source samples indicate that Method Two cleanup levels were attained, and it was not necessary to compare the results to Method Three site-specific levels.
The results of 2011 closure soil sampling and analyses presented in this report indicate that the ADEC Method Two Cleanup Levels at the WRHFF Spill Site have been met. The groundwater
at this site did not contain any contaminants above cleanup levels from 2008 to 2010 (USAF,
2011a). This site is recommended for a Cleanup Complete status.
Based on the findings of this report, it is recommended that a closure document be prepared and
submitted to ADEC requesting they issue a Cleanup Complete Status for the WRHFF Spill Site.
Decommissioning of monitoring well WRHFF-01 is also recommended. |
Louis Howard |
| 4/26/2012 |
Cleanup Complete Determination Issued |
Upon review of the draft closure sampling summary report, ADEC has determined that cleanup is complete (under site cleanup rules) for the West Ramp Hydrant Fueling Facility (CS Database Hazard ID # 4085). ADEC is making this determination based on the information provided by the Air Force to date, that the site has been adequately characterized in accordance with 18 AAC 75.335.
The site has achieved the applicable requirements of the contaminated site cleanup rules (18 AAC 75.341, Tables B1 and B2 Method Two, Migration to Groundwater pathway). Groundwater at the site did not contain any contaminants above cleanup levels from 2008 to 2010. Previous soil sampling eliminated PAHs as a COC for this site.
The determination that cleanup is complete is subject to a potential future determination by ADEC that the cleanup is not protective per 18 AAC 75.380(d)(2)). If ADEC makes a determination that conditions at a site are no longer protective of human health, safety or welfare, or of the environment, ADEC will require additional actions that meet the requirements of the site cleanup rules.
Although a Cleanup Complete determination has been granted, ADEC approval is required for off-site soil disposal in accordance with 18 AAC 75.325 (i). It should be noted that movement or use of potentially contaminated soil in a manner that results in a violation of 18 AAC 70 water quality standards is unlawful.
ADEC agrees with the recommendations that a formal closure document be submitted to ADEC for concurrence as well as decommissioning monitoring well WRHFF-01. |
Louis Howard |
| 8/12/2014 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 75059 name: Product recovery tank spill |
Louis Howard |
