Site Report: ADOTPF - Manley Maintenance Station
| Site Name: | ADOTPF - Manley Maintenance Station |
|---|---|
| Address: | Milepost 149 Elliot Highway, Manley Hot Spgs, AK 99756 |
| File Number: | 180.26.006 |
| Hazard ID: | 24880 |
| Status: | Cleanup Complete - Institutional Controls |
| Staff: | IC Unit, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 65.007410 |
| Longitude: | -150.612960 |
| Horizontal Datum: | NAD83 |
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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
Two USTs were removed as part of a MOA in 1998; tank #1 was a 3,000 gallon diesel UST, and tank #2 was a 4,000 gallon gasoline UST. The dispenser island was located directly above the two UST's. The tanks, and piping which had threaded fittings, were observed to be in good condition at the time of removal. 130 cubic yards of contaminated soil (DRO 2,950 mg/kg, GRO 11,500 mg/kg, toluene 913 mg/kg , benzene 451mg/kg, ethylbenzene342 mg/kg, and xylenes up to 1,836 mg/kg) was removed and stockpiled at the time of the UST removal. Further site characterization was performed by Shannon and Wilson in August 2002, at which time another 1,600 cy of soil was excavated and stockpile at a nearby gravel pit, as there was not enough room at the site. The stockpiled soil has been approved (and used) as cover material in the community landfill
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 3/22/1999 | Underground Storage Tank Site Characterization or Assessment | SA submitted to DEC by ADOT - completed by Emcon as part of MOA contract. | John Carnahan |
| 3/22/1999 | Site Added to Database | Former Staff | |
| 3/22/1999 | Leaking Underground Storage Tank Release Confirmed - Petroleum | LUST Site created in CSP for source area ID 77332 SA submitted to DEC by ADOT | Former Staff |
| 9/8/2000 | Leaking Underground Storage Tank Cleanup Initiated - Petroleum | Approx. 130 cubic yards of material removed and stockpiled onsite. | John Carnahan |
| 8/21/2002 | Update or Other Action | RECKEY has automatically been generated. | Cynthia Pring-Ham |
| 1/28/2004 | Update or Other Action | Transferred DEC staff lead from John Carnahan | Cynthia Pring-Ham |
| 1/13/2005 | Update or Other Action | Update GIS (NAD83) using Topozone Pro, All Topo maps, and report maps and diagrams. | Kim DeRuyter |
| 1/13/2005 | Document, Report, or Work plan Review - other | Shannon and Wilson Corrective Action Report received Feb. 2003 summarizes the excavation and site characterization done the August 2002. The 1998 stockpile was not on site and has not been accounted for. 2002 stockpile remains above migration to groundwater cleanup levels for GRO, DRO, and BTEX. Groundwater at the site is believed to be at 80' bgs, bedrock at 34'. On site and down gradient drinking water wells were not impacted by the spill. The contaminated soil was excavated to the greatest extent possible and none of the confirmation samples was above the inhalation or ingestion cleanup levels. Completion of the migration to groundwater pathway seems unlikely due to a confining layer of silt soils over the bedrock. | Kim DeRuyter |
| 5/2/2005 | Document, Report, or Work plan Review - other | Received stockpile and groundwater monitoring results. Approved dismantling the top 1.5 feet of the soil stockpile. Groundwater samples did not contain DRO, GRO, or BETX compounds above PQLs. | Kim DeRuyter |
| 9/9/2005 | Document, Report, or Work plan Review - other | Received August stockpile sampling report. The top 1.5 ' was used for cover at the Manley landfill this summer, the remaining soil was reworked and spread on liners. Contaminant levels continue to decline, and the remainder of the stockpile is expected to be approved for use at the landfill by summer 2006. | Kim DeRuyter |
| 6/30/2006 | Update or Other Action | Called Darren Mulkey to discuss disposal of the stockpile. Darren will call the Manley Village Council to see if they can use the remaining soil for landfill cover, as contaminant levels have remediated far below the inhalation and ingestion cleanup levels. | Kim DeRuyter |
| 9/25/2006 | Institutional Control Record Established | In accordance with 18 AAC 78.274(b), ADEC approval must be obtained prior to the removal and or disposal of soil or groundwater from this site to an off-site location. IN addition, the ADEC should be notified prior to any excavation in the impacted area as screening for impacted material and the use of properly trained excavation personnel may be required. In accordance with 18 AAC 78.276(f)(2), additional investigation and cleanup may be required if new information is discovered which leads the ADEC to make a determination that the cleanup described in the decision is not protective of human health, safety, and welfare or the environment. ADEC will consider a Site Closure and removal of institutional controls only after the soil and groundwater achieves the established cleanup levels for the site. | Kim DeRuyter |
| 9/25/2006 | Conditional Closure Approved | BETX analytes were detected above the migration to groundwater cleanup level in the soil at the limits of the UST excavation. GRO, and DRO were not detected and the groundwater at the site has not been impacted. The contamination is greater than 10' bgs, and does not pose a risk to human health or the environment provided institutional controls are maintained at the site. | Kim DeRuyter |
| 12/11/2007 | Update or Other Action | ADOTPF confirmed that the remaining soil stockpiled in the gravel pit has been used as landfill cover | Jim Frechione |
| 12/20/2011 | Update or Other Action | Site management staff changed to IC Unit. | Evonne Reese |
| 12/20/2011 | Institutional Control Compliance Review | IC review conducted. | Evonne Reese |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| BTEX | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil |
Control Type
| Type | Details |
|---|---|
| Other |
Requirements
| Description | Details |
|---|---|
| Advance approval required to transport soil or groundwater off-site. | |
| Excavation / Soil Movement Restrictions | |
| 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 |
|---|---|---|
| 26572 | ADOT&PF Manley Maintenance Station Class V Injection Well | 180.38.011 |