Site Report: JBER-Ft. Rich SS119 Bldg 791
| Site Name: | JBER-Ft. Rich SS119 Bldg 791 |
|---|---|
| Address: | West of 5th Street & East of 6th Street, Formerly Fort Richardson before 10/01/2010, Fort Richardson (JBER), AK 99505 |
| File Number: | 2102.38.073 |
| Hazard ID: | 26522 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 61.262606 |
| Longitude: | -149.686322 |
| Horizontal Datum: | WGS84 |
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We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.
Problems/Comments
As part of geotechnical investigation for construction of Building 791 in 2007, the US Army Corps of Engineers detected fuels, beta-BHC, and pentachlorophenol above cleanup levels in soil. 2016 additional investigation was conducted and only diesel range organics and naphthalene were detected above cleanup levels in the top 20’. Groundwater at up to 114' below ground surface is not impacted based on monitoring well results. After a Method Three calculation was performed and no exceedances were found, the site warranted a cleanup complete determination and is closed.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 12/5/2007 | Update or Other Action | US CORPS of Engineers Chemical Data Report, Soil HTRW Survey, for the Enlisted Unaccompanied Personnel Housing, FTR196 memorandum received. 28 borings drilled and 54 samples were collected. Only two of the samples were analyzed for the full suite of SVOCs by SW8270. 4 borings had DRO exceeding migration to groundwater cleanup level. RRO in Boring AP-5254 had detected 25,000 mg/kg which is greater than the maximum allowable concentration for RRO in 18 AAC 75 (22,000 mg/kg) and more than the ingestion value of 10,000 mg/kg or migration to groundwater value of 11,000 mg/kg. TCE and 1,1,2,2-tetrachloroethane, beta-BHC, PCBs, heptachlor epoxide and pentachlorophenol were all found to be above the cleanup levels. Contamination ranged from 0-15' bgs. For additional information, see site file. | Louis Howard |
| 2/12/2016 | Update or Other Action | Preliminary source evaluation work plan received for review and comment. SS119 is bordered by several sites with known contamination, including the SS013 MP barracks site to the south, TU058 DRO plume further south extending west, and the AT035 Maneuver Enhancement Brigade (MEB) Company Operations Facility to the west. The goals of this PSE are to characterize the nature and extent of contamination in soil and groundwater at SS119. These goals will be achieved by advancing and sampling soil borings, as well as installing and sampling groundwater monitoring wells. A vapor intrusion investigation at Building 791 will be conducted as part of the site SS013 MP barracks remedial investigation presented under a separate cover. Four monitoring wells, three upgradient and one crossgradient from SS119, are also proposed under SS013 site activities. For more information, see site file. | Louis Howard |
| 2/16/2016 | Site Added to Database | A new site has been added to the database | Evonne Reese |
| 2/17/2016 | Document, Report, or Work plan Review - other | Staff provided comments on the PSE Work Plan. There are three management options for sources reviewed in a PSE processes: a) No Further Action (NFA), in terms of planning for FFA remediation (such a decision would not prohibit future activity undertaken pursuant to State authority); b) inclusion in an RI/FS; or, c) recommendation for interim remedial action. Groundwater cleanup levels are to be based on the maximum detected concentration (as defined in 18 AAC 75, the Risk Assessment Procedure Manual and Cumulative Risk Guidance, both adopted by reference) and not statistics (i.e. 95% UCL) averaging concentrations from monitoring well results. Staff stated that if contamination was found in soil borings at 25 foot depth, then the boring and field screening shall continue and not be limited to a contractual 25 foot depth. See site file for additional information. | Louis Howard |
| 4/13/2016 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79879 name: Building 791 | Louis Howard |
| 1/23/2018 | Update or Other Action | Draft 2016 PSE Source Area SS119 – Bldg 791 NORTH DRO Site received for review and comment. Soil contamination was only found in the upper 20 feet of soil, which was located within or directly below the suspected soil stockpile. Results collected from deeper soil and groundwater did not identify any compounds at concentrations above ADEC cleanup levels. The only compound driving carcinogenic risk was benzo(a)pyrene, which was detected at only one location, indicating that benzo(a)pyrene contamination at the site is de minimis. The ADEC cumulative risk calculator (ADEC 2016) generated a hazard index of less than 1 and a carcinogenic risk standard of less than 1×10-5; therefore, no further action is recommended at Source Area SS119. See site file for additional information. | Louis Howard |
| 1/23/2018 | CERCLA SI | Draft Preliminary Source Evaluation (PSE) Report approved without comment or changes by ADEC. This was a limited field investigation (aka PSE 2) per the Fort Richardson Federal Facility Agreement (1994). ADEC concurs that no further action (NFA), in terms of planning for FFA remediation is appropriate (such a decision would not prohibit future activity undertaken pursuant to State authority). See site file for additional information. | Louis Howard |
| 4/2/2018 | Cleanup Complete Determination Issued | Cleanup complete determination granted for SS117 Building 791. Groundwater at an average depth of 99' is not impacted and maximum depth of contamination is 20 feet below ground surface. Method three cleanup level for DRO is 10,300 mg/kg and naphthalene at 29 mg/kg. Maximum detected concentrations at 5' bgs for DRO is 1,080 mg/kg and naphthalene at 20' bgs is 0.0557 mg/kg. Based on the depth of contamination at the site, lack of groundwater contamination, the soil does not pose a migration to groundwater risk and the remaining concentrations are below the site-specific method three calculated ingestion cleanup levels for DRO and human health level for naphthalene. ADEC has determined the cleanup is complete at SS119. This determination is in accordance with 18 AAC 75.380(d) and does not preclude ADEC from requiring additional assessment and/or cleanup action if future information indicates that contaminants at this site may pose an unacceptable risk to human health, safety, or welfare or to the environment. See site file for additional information. | Louis Howard |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | SoilSoil |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. | |
| Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70) |
No associated sites were found.