Skip to content
Back to Top

Site Report: ARRC Healy Round House


Site Name: ARRC Healy Round House
Address: ARRC Mile Post 359, Healy, AK 99743
File Number: 150.26.037
Hazard ID: 25414
Status: Active
Staff: Grant Lidren, 9072698685 grant.lidren@alaska.gov
Latitude: 63.854341
Longitude: -148.963484
Horizontal Datum:WGS84

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

Petroleum-impacted soils, evident by hydrocarbon stains and odor, were encountered in 1990 during the excavation of a 9,000-gallon waste oil underground storage tank (UST) rail car. The excavation was limited to the south by the roundhouse building and to the east and west by railroad tracks. Two soil samples collected from the base of the excavation at the ends of the tanks, at 10 ft. bgs, contained TRPH up to 20,000 mg/kg. Four soil samples collected from the four side walls of the excavation, at 3ft, 3ft, 6ft, and 8ft. bgs, contained TRPH up to 24,000 mg/kg. Only one soil sample, collected from the south side wall at 6ft. bgs, analyzed for halogenated volatiles were nondetect. The ultimate fate of the soil stockpile remains unknown. It may have been put back into the excavation or it was remediated offsite. Groundwater was not encountered during the excavation. As of 1990, the only drinking water well (200 ft. bgs) is 1,500 feet up gradient located at the ARRC engineering building. Additional regulated USTs at this site are tracked under Hazard ID 24235, File No. 150.26.005.

Action Information

Action Date Action Description DEC Staff
11/15/1990 Site Added to Database A new site has been added to the database (Date adjusted from 5/27/2009 for report/query consistency. (Reese)) Mitzi Read
11/15/1990 Report or Workplan Review - Other ADEC recieved the Monitoring Removal Of Waste Oil Storage Tank, Healy, Alaska, dated November 15, 1990, submitted by Shannon and Wilson. Petroleum impacted soil was encounted during the removal of a 9,000 gallon waste oil UST. Grant Lidren
5/27/2009 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST site created in CSP database for source area 9,000-gallon Waste Oil UST (Rail Car), 78782 Mitzi Read
5/27/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78782 name: 9,000-gallon Waste Oil UST (Rail Car) Mitzi Read
5/28/2009 Site Characterization Workplan Approved ADEC approved the Work Plan for Soil Borings and Sampling Healy Round House, Healy Alaska dated May 2009 and submitted by Clarus to ADEC on May 11, 2009. Four soil borings will be advanced to a depth of approximately 20 ft. bgs and samples will be collected at 5 ft. intervals around the former UST. Two soil samples from each boring will be analyzed for GRO, DRO, RRO, BTEX, PAH, VOC, and metals. If GW is encountered, a soil sample will be collected from the GW interface. Grant Lidren
3/30/2010 Report or Workplan Review - Other On this date, ADEC received a Phase II Subsurface Soil Investigation Report Healy Roundhouse, submitted by Clarus dated March 24, 2010. Nine soil samples were collected from four soil borings advanced on the north (B4), east( B2), south(B1), and west (B3) of the former UST excavation and analyzed for DRO, GRO, and RRO, PAHs, metals and VOCs including BTEX. Two soil samples were collected from each boring: one from the groundwater interface at 17 to 20 ft. bgs.; and one from soil observation and field screen results; contained benzene up to 0.233, GRO up to 704 mg/kg, and DRO up to 10,500 mg/kg. At B1, below the liner, which was encountered at 8 ft. bgs, the soil was black stained and had a slight petroleum odor. At B2 and B3, the groundwater contained petroleum odor and free product. At B4, petroleum odor was noted in the soil. Grant Lidren
3/30/2010 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Administrative action added for consistency in LUST grant reporting. Evonne Reese
8/17/2011 Report or Workplan Review - Other On this date, ADEC received the Work Plan for Soil Boring Groundwater Healy Roundhouse submitted by RSE. Four soil borings will be advanced, two borings on each side of the RR tracks, and completed as monitoring wells. Two soil samples will be collected per boring plus one duplicate. One sample will be collected from the GW interface and one will be collected from the highest PID reading. One groundwater sample will be collected from each MW plus one duplicate. Grant Lidren
2/28/2012 Update or Other Action On this date, ADEC received the Site Characterization Report for the ARRC Healy Roundhouse submitted by RSE dated January 2012. Seven soil borings were advanced, but only three were completed as MWs due to refusal. Five soil samples were collected from the three borings completed as MWs. Three soil samples collected at the GW interface at 18 to 22 ft. bgs contained DRO up to 4,100 mg/kg. A soil sample collected at 3 ft. bgs contained DRO at 46,500 mg/kg. Four groundwater samples collected from the MWs contained DRO up to 5.14 mg/L. Groundwater flow is to the south east. Grant Lidren
9/12/2012 Site Characterization Workplan Approved On this date, ADEC received the Work Plan for Monitoring Groundwater at the Healy Roundhouse submitted by FES. The GW will be analyzed at the three MWs. Grant Lidren
11/27/2012 Site Characterization Report Approved On this date, ADEC received the Groundwater Monitoring Report Healy Roundhouse submitted by FES. Groundwater was sampled on 10/5/2012. Out of the three MWs sampled, only one contained petroleum contained contamination above Table C. Groundwater Cleanup Levels. RSE-2 contained DRO up to 3.21 mg/L. All three wells had a petroleum odor and RSE-2 contained a sheen. The depth of groundwater was 17.8 to 23.1 feet bgs and flowed to the southeast. Grant Lidren
5/7/2013 Potentially Responsible Party/State Interest Letter PRP letter sent to ARRC Grant Lidren
5/9/2013 Update or Other Action ADEC recieved the 2013 Groundwater Monitoring Work Plan on this date. The three MWs will be sampled Grant Lidren
4/1/2014 Site Characterization Report Approved On this date, ADEC received the Groundwater Monitoring Report Healy Roundhouse submitted by FES dated March 22, 2014. On June 12, 2013, the three onsite MWs were sampled. Discontinuous sheen and moderate odor were noted in RSE-1 and RSE-2; RSE-3 contained a mild odor. RSE-1 contained DRO up to 12.9 mg/L and RRO up to 3.53 mg/L. RSE-2 contained DRO at 1.52 mg/L. RSE-3 contained detectable levels of RRO and DRO, but below Table C cleanup levels. The depth of groundwater was 18 to 23 feet bgs and flowed to the southeast. Grant Lidren
9/23/2014 Site Characterization Workplan Approved ADEC received the “2014 Well Installation and Groundwater Monitoring Work Plan Healy Roundhouse Alaska Railroad Milepost 359, Alaska ADEC Hazard ID – 25414 / File ID – 150.26.037” submitted by FES dated September 23, 2014. Three boring will be advanced east of the site below the bluff and completed as monitoring wells. At least one soil sample will be collected at the GW interface with additional soil samples collected if screening indicate other likely areas of contamination. Ground water samples will be collected from the three historic monitoring wells and from the three new monitoring wells. Grant Lidren
1/19/2015 Site Characterization Report Approved On this date, ADEC received the 2014 Well Installation and Groundwater Monitoring Report, Rev 1 Healy Roundhouse submitted by FES dated January 16, 2015. In October 2014, four soil borings were advanced downhill of the site with three completed as monitoring wells and the three onsite historic MWs were sampled. The four new borings were advanced along a steep hill 65 feet lower than the site along the assumed GW gradient toward the Nenana River. Soil samples collected from the three borings SB-1, SB-2, and SB-3 at the groundwater interface 14 to 20 feet bgs contained detectable concentrations of contaminants but below method two MTG cleanup levels. These three borings were completed as monitoring wells MW-4, MW-5, and MW-6. A soil sample from the fourth boring SB-4 collected above the GW interface due to refusal at 8 feet bgs contained DRO at 1,610 mg/kg. SB-4 contained a petroleum odor below 6 feet bgs with a PID reading of 63.9 ppm and a strong petroleum odor below 8 feet bgs with a pid reading of 388 ppm. Only two of the three historic MWs located in the source area were sampled due to an obstruction in RSE-1. These two MWs, RSE-2 and RSE-3, contained detectable concentrations of contaminants but below Table C GW cleanup levels. A discontinuous sheen and odor was noted in RSE-2; RSE-3 contained a mild odor. Only MW-5 of the three new MWs located downhill of the site contained detectable concentrations of contaminants but below table C cleanup levels. MW-5 contained GRO at 0.0365J mg/L. Groundwater flow is to the east with a steep gradient matching surface topography. Grant Lidren
6/4/2015 Site Characterization Workplan Approved On this date ADEC received the 2015 Groundwater Monitoring Work Plan Healy Roundhouse Alaska Railroad Milepost 359, Alaska ADEC Hazard ID – 25414 / File ID – 150.26.037 submitted by FES dated May 13, 2014. Ground water samples will be collected from the six historic monitoring wells. Grant Lidren
2/4/2016 Site Characterization Report Approved On this date ADEC received the 2015 Groundwater Monitoring Report Healy Roundhouse Alaska Railroad Milepost 359, Alaska ADEC Hazard ID – 25414 / File ID – 150.26.037 submitted by FES dated October 26, 2015. Ground water samples were collected from the six historic monitoring wells. Sheen and odor were noted in the purge water from RSE-1 and RSE-3. Only monitoring well RSE-1, located at the source area, contained contaminant concentrations above cleanup levels with DRO at 6.51 mg/L and RRO at 1.71 mg/L. The rest of the monitoring wells contained detectable concentrations of contaminants below cleanup levels except for MW-4 which was ND. Groundwater flow is to the east north-east with a steep gradient (12 to 23 feet bgs) matching surface topography. Grant Lidren
3/21/2017 Meeting or Teleconference Held Meeting with ARRC on this date. The groundwater will be sampled during the summer of 2017. Grant Lidren
10/19/2017 Site Characterization Workplan Approved On this date, ADEC approved the Work Plan for Groundwater Sampling at ARRC Healy Roundhouse Healy, Alaska ADEC File # 150.26.037 Rev 2.0 submitted by RSE and dated September 26, 2017. Grant Lidren

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

There are no documents for this site report.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.
Continue     Close