Site Report: ARRC Anchorage Terminal Reserve GW Area 6
| Site Name: | ARRC Anchorage Terminal Reserve GW Area 6 |
|---|---|
| Address: | 101 East Whitney Road, Whitney Road at C Street Bridge, Anchorage, AK 99501 |
| File Number: | 2100.38.447 |
| Hazard ID: | 4627 |
| Status: | Active |
| Staff: | Michael Hooper, 9074515174 michael.hooper@alaska.gov |
| Latitude: | 61.224900 |
| Longitude: | -149.885100 |
| 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
Remedial Investigation ARRC Anchorage Terminal Reserve U.S. EPA Docket No. CERCLA 10-2004-0065, submitted by ENSR and recieved by the ADEC on this date. This site is located at the Groundwater Area 6 in the Anchorage Terminal Reserve- north of Ship Creek along Whitney Road, underneath the C street bridge. High levels of PCE and TCE found throughout plume. Groundwater Contaminate levels up to 0.062 mg/L TCE, 0.02 mg/L PCE, and 0.14 cis-1,2-dichloroethylene detected. Surface soil samples indicate benzene contamination up to 0.0566 mg/kg and TCE contamination up to 0.04 mg/kg. Contamination appears to be coming from the railyard upgradient, which can be a multitude of sources from current and historic RR activities. The plume appears to be flowing from north to south, underneath the C street bridge. Groundwater is flowing to the southwest on the site. For more information consult CS file # 2100.38.447 ARRC Anchorage Terminal Reserve
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 4/8/2008 | Site Added to Database | Site added to the database. | Mitzi Read |
| 4/9/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Grant Lidren |
| 4/20/2016 | Update or Other Action | On this date, ADEC received the Anchorage Terminal Reserve Oversight Referral letter submitted by EPA dated April 18, 2016. The letter states, "EPA will enter a corrective action event code into RCRAInfo to indicate the site has been transferred to a non-RCRA authority, with event code comments documenting the transfer of responsibility to ADEC." As a result, ADEC will continue to manage contaminated sites in the Anchorage Terminal Reserve in accordance with State regulations. | Grant Lidren |
| 3/9/2018 | Site Characterization Report Approved | ADEC received the Letter Report for Groundwater Sampling within the ARRC Anchorage Terminal Reserve Whitney Road, Anchorage, Alaska ADEC File # 2100.38.447, Hazard ID 4074 Rev. 1.3 submitted by RSE and dated March 9, 2018. Eleven monitoring wells were proposed to be sampled within the Anchorage Terminal Reserve: MWB17, DPB21, MW24, MWB09, MWA05, MWA07, DPB04, DPA32, MWA22, MWE05, and MWE06. Two of these wells, DPB21 (GW-1) and MWE05 (GW-7), were not sampled due to poor well condition and free product respectively. These 11 MWs are half the wells on the property, the remaining wells will be sampled in 2018. Monitoring wells MW24 (GW 2/3) and MWE06 (GW-7) produced purge water emitting strong hydrocarbon odor. Monitoring well MWA07 (GW-6) produced purge water with visible sheen. Monitoring wells MWA07 (GW-6) and MWE06 (GW-7) contained DRO of 2.42 mg/L and 27.6 mg/L respectively exceeding the ADEC Table C Groundwater Cleanup Level (GCL) of 1.5 mg/L. Sampling of monitoring wells MWA05 (GW-6) and MWE06 (GW-7) contained RRO of 2.42 mg/L and 3.17 mg/L respectively exceeding the GCL of 1.1 mg/L RRO. Monitoring well MWE06 (GW-7) contained 1,2,4-trimethylbenzene at 117 ug/L exceeding the GCL of 15 ug/L and naphthalene at 270 ug/L exceeding the GCL of 1.7 ug/L. Sample MWB17 (GW-1) contained chloroform at 2.90 ug/L above the GCL of 2.2 ug/L chloroform and trichloroethylene (TCE) at 14.7 ug/L exceeding the GCL of 2.8 ug/L. Monitoring well DBP04 (GW-4) contained vinyl chloride at 1.27 ug/L exceeding the GCL of 0.19 ug/L.MWA05 (GW-6) contained cadmium (25.3 ug/L) and vanadium (180 ug/L) each exceeding the respective GCL of 9.2 ug/L cadmium and 86 ug/L vanadium. This well had evidence of compromise, with an exposed wellhead that may have contributed to groundwater being exposed to external conditions and should be decommissioned. | Grant Lidren |
| 12/21/2020 | Update or Other Action | The US EPA Superfund Program contacted DEC requesting an update on the efforts completed for the Groundwater Area 6 contamination. | Janice Wiegers |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.