Site Report: ADOC Yukon Kuskokwim Correctional Center UST 3
| Site Name: | ADOC Yukon Kuskokwim Correctional Center UST 3 |
|---|---|
| Address: | 1000 Chief Eddie Hoffmay Highway, Bethel, AK 99559 |
| File Number: | 2407.26.017 |
| Hazard ID: | 27005 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 60.786317 |
| Longitude: | -161.787086 |
| 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
During closure of an underground storage tank (UST #3) on October 8 and 9, 2018, a 2,000-gallon double-walled tank used for bulk diesel fuel was storage removed and a site assessment was conducted. The UST was located in a vegetated area north of the Yukon Kuskokwim Correctional Center building. Thirty-four discrete soils samples were collected for field screening using a photoionization detector (PID). Additional soil samples were collected and further analyzed for: gasoline range organics (GRO); diesel range organics (DRO); benzene, toluene, ethylbenzene, and xylenes (BTEX); volatile organic compounds (VOCs); and polynuclear aromatic hydrocarbons (PAHs). All soil samples contained estimated concentrations of DRO and one sample contained an estimated concentration of benzene. A duplicate sample set contained detectable concentrations of naphthalene, 1-methynaphthalene, and 2 methylnaphthalene. All detected concentrations and estimated concentrations were less than ADEC cleanup levels. Approximately 30 cubic yards of potentially-clean stockpiled soil were used to backfill the excavation. Approximately 2 cubic yards of stockpiled soil remains on site that was suspected to potentially contain contaminants.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 10/8/2018 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | (Postdated for action that occurred prior to database entry) - From October 8 through 9, 2018, an approximately 2,000-gallon, double-walled UST and associated piping were removed and a site assessment and closure investigation was conducted. The final excavation measured approximately 10 feet by 20 feet at the surface, with an average depth of about 10 feet below ground surface (bgs). A test pit was advanced in the center below the UST and groundwater was not observed within 5 feet below the UST. Approximately 32 cubic yards (cy) of material, generally consisting of well graded sand, were generated during excavation activities. The material was temporarily stockpiled on and covered by 6-milimeter polyethylene liners along the western fence boundary. During the removal of the piping, less than a cup of residual fuel was released into the excavation. The material which was impacted by the de minimus spill was also placed in the potentially impacted soil stockpile. Field screening and analytical samples were collected to determine the presence or absence of contamination. | Jamie Grant |
| 11/1/2018 | Underground Storage Tank Site Characterization or Assessment | Site Assessment and Closure Report submitted for ADEC review. | Jamie Grant |
| 2/21/2019 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 2/21/2019 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST site created in CSP database for source area 2,000-Gallon Diesel UST #3, 80375 | Mitzi Read |
| 3/25/2019 | Document, Report, or Work plan Review - other | Site assessment activities during the closure and removal of the subject UST and associated piping were conducted in general accordance with 18 AAC 78 UST Regulations, ADEC Field Sampling Guidance, and the ADEC UST Procedures Manual. Field screening samples were collected from 21 discrete locations within the UST excavation, approximately 5 locations in the potentially impacted soil stockpile, and 8 locations within the potentially clean soil stockpile. Each sample was screened for volatile organic compounds (VOCs) using a photoionization detector (PID) and an ADEC-approved headspace sampling method. Analytical samples were selected based on field screening results and required locations specified in ADEC’s UST regulations. Six analytical samples, including one duplicate were collected from undisturbed soil within the excavation area. Of the six excavation area samples, one sample was collected from beneath the vent pipe, one from beneath the feed/return lines, two from the excavation base, and two from the center of the east sidewall. The duplicate sample was collected from the east sidewall location. Additionally, two samples were collected from the potentially clean soil stockpile, and one sample was collected from the potentially impacted soil stockpile. Nine project soil samples, including one field duplicate, were analyzed for GRO; DRO; and benzene, toluene, ethylbenzene, and xylenes (BTEX). Three samples, including one duplicate, were also analyzed for VOCs and PAHs. All target analytes were less than the Method Two Cleanup Levels in 18 AAC 75.341 Tables B1 and B2 for migration to groundwater and for human health. | Jamie Grant |
| 4/24/2019 | Cleanup Complete Determination Issued | Remaining contamination in soil is below ADEC Method Two Cleanup Levels in 18 AAC 75.341 Tables B1 and B2. This site is closed with a "cleanup complete" determination and is subject to conditions outlined in the ADEC Decision Document dated April 24, 2019. | Jamie Grant |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | < Method 2 Most Stringent | Soil |
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) |
| Hazard ID | Site Name | File Number |
|---|---|---|
| 25144 | ADOC Yukon Kuskokwim Correctional Center UST 1 | 2407.26.006 |