| 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 |
Document, Report, or Work plan 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 |
Document, Report, or Work plan 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 |
Document, Report, or Work plan 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 |
| 3/16/2018 |
Site Characterization Report Approved |
ADEC received the Letter Report for Groundwater Sampling at ARRC Healy Roundhouse Healy, Alaska ADEC File # 150.26.037 submitted by RSE dated March 6, 2018. Ground water samples were collected from the six historic monitoring wells. Petroleum odor was noted in the purge water from RSE-1 and RSE-2. Only monitoring wells RSE-2 and RSE-3 contained contaminant concentrations above cleanup levels with PCE at 64.4 ug/L and 372 ug/L respectively(note: the sampling precision RPD for PCE parent and duplicate was 56%) . Groundwater flow is to the east north-east with a steep gradient (17 to 23 feet bgs) matching surface topography. |
Grant Lidren |
| 9/7/2018 |
Document, Report, or Work plan Review - other |
On this date, the Work Plan for Groundwater Sampling at ARRC Healy Roundhouse Healy, Alaska ADEC File # 150.26.037 Rev 3.0 was received. ADEC has no objections to the work plan and RSE may proceed with the following comment: the GAC will contain PCE and TCE, which is not a petroleum waste. RSE is responsible for proper disposal of the GAC at an approved facility. |
Grant Lidren |
| 12/19/2018 |
Site Characterization Report Approved |
ADEC received the Letter Report for Groundwater Sampling at ARRC Healy Roundhouse Healy, Alaska ADEC File # 150.26.037 submitted by RSE dated December 19, 2018. Ground water samples were collected from the six historic monitoring wells. Monitoring wells RSE-1 and RSE-2 contained DRO concentrations above cleanup levels at 1.75 mg/L and 1.99 mg/L respectively. MW-6 contained TCE at 3.9 ug/L. TCE was also detected below cleanup levels in RS-3 up to 2.52 ug/L. (Note: RSE-2 was sampled with a peristaltic pump instead of a submersible pump due to an obstruction). |
Grant Lidren |
| 8/7/2019 |
Site Characterization Workplan Approved |
On this date, ADEC received the Work Plan for 2019 ARRC Healy Roundhouse Rev. 1.0 Healy, Alaska ADEC File # 152.26.002 submitted by RSE and dated August 5, 2019. |
Grant Lidren |
| 1/24/2020 |
Site Characterization Report Approved |
ADEC received the ARRC Healy Roundhouse groundwater Assessment Healy, Alaska ADEC File # 150.26.037 submitted by RSE dated December 19, 2018. Ground water samples were collected from the six historic monitoring wells. Monitoring wells RSE-1 and RSE-2 contained DRO concentrations above cleanup levels at 2.73 mg/L and 1.53 mg/L respectively. MW-2 contained RRO at 1.43 mg/L. RSE-3 and MW-6 contained TCE at 4.32 ug/L and up to 4.5 ug/L respectfully. RSE-1 contained TCE at 5.54 ug/L. (Note: RSE-2 was sampled with a peristaltic pump instead of a submersible pump due to an obstruction and result should be considered biased low). The 2019 groundwater levels in wells MW-4, MW-5 and MW-6 were 2.75 to 3.0 feet higher than in 2018. |
Grant Lidren |
| 8/3/2021 |
Meeting or Teleconference Held |
Meeting with ARRC and RSE to discuss site and plans for 2021/2022. |
Jamie Grant |
| 1/18/2022 |
Site Characterization Workplan Approved |
On this date, ADEC reviewed a Groundwater Sampling Work Plan for ARRC Healy Roundhouse in Healy, Alaska. The work plan is approved and RSE may proceed with the following two conditions: (1) the GAC will contain PCE and TCE, which is not a petroleum waste. RSE is responsible for proper disposal of the GAC at an approved facility. (2) With the exception of RSE-2, monitoring well sampling shall be conducted using a positive pressure submersible pump or other device which limits VOC loss, such as bladder pump, gear pump HydraSleeve, etc. |
Jamie Grant |
| 1/18/2022 |
Site Characterization Workplan Approved |
On this date, ADEC reviewed a Groundwater Sampling Work Plan for ARRC Healy Roundhouse in Healy, Alaska. The work plan is approved and RSE may proceed with the following two conditions: (1) the GAC will contain PCE and TCE, which is not a petroleum waste. RSE is responsible for proper disposal of the GAC at an approved facility. (2) With the exception of RSE-2, monitoring well sampling shall be conducted using a positive pressure submersible pump or other device which limits VOC loss, such as bladder pump, gear pump HydraSleeve, etc. |
Jamie Grant |
| 3/1/2023 |
Site Characterization Report Approved |
Reviewed groundwater monitoring report. Petroleum contamination in the source area seems to have stabilized and is not migrating. Trichloroethylene (TCE) contamination is still slightly above the cleanup levels at 3.13 ug/L in the down-gradient wells. Recommended sampling again in a few years. |
Michael Hooper |
