| 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 |
| 4/9/2010 |
Update or Other Action |
ADEC has no objection to the proposed transportation of approximately 250 cubic yards of DRO and RRO contaminated soil (up to 702 mg/kg and 2,350 mg/kg respectively) from ARRC - Anchorage Terminal Reserve GW Areas 2/3 & 4, ARRC Building 16(freight shed) at the corner of East 1st Ave. and North C Street. The soil is approved for transport to the ARRC Gravel Track Birchwood Yard MP 135.5, conditional on the following: the soil shall be containerized and/or covered during transport; the soil shall not be mixed; the soil shall not contain debris; and the soil shall be land spread into a thin surface layer 18 inches thick. Pending completion of the land spreading activities, soil samples will need to be collected. The soil samples will need to be field screened and analyzed for diesel range organics (DRO).
|
Grant Lidren |
| 11/24/2010 |
Update or Other Action |
On this date ADEC received ARRC – Anchorage Terminal Reserve GW Areas 2/3 & 4 Freight Shed Stockpile Sampling. Two-five spot composite samples contained DRO up to 85.5 mg/kg. |
Grant Lidren |
| 11/29/2010 |
Update or Other Action |
The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has no objection to the land spreading of the Freight Shed stockpile located within the ARRC Birchwood Rail Yard. The landspread stockpile must be must be located at least 100 feet from surface water. |
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 |
| 5/4/2017 |
Site Characterization Report Approved |
Ahtna submitted the Final Work Plan Groundwater and Indoor air Evaluation Alaska Real Estate Parking Lot ADEC SPAR Term Contract #18-8036-13 dated March 6, 2017. Work to be completed includes, among other things, monitoring area-wide groundwater from the Alaska Real Estate site (2100.38.434) and monitoring this GW 2/3 & 4 site. |
Grant Lidren |
| 11/6/2017 |
Site Characterization Report Approved |
ADEC received the Groundwater Evaluation Interim Report Alaska Real Estate Parking Lot, Anchorage, Alaska Notice-to-Proceed Number 17000735 dated October 23, 2017 submitted by Ahtna. Twenty-five MWs were scheduled for sampling but only 13 MWs were sampled. The other monitoring wells were not located and may no longer be present. Two of the monitoring wells sampled within the GW 2/3 area (MWB08 and AKRRMW-24S) contained detectable levels of contaminants, but below cleanup levels. see file 2100.38.434 Alaska Real Estate Parking lot for further information. |
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 |
| 4/23/2019 |
Site Characterization Report Approved |
On this date, ADEC received the Letter Report for Groundwater Sampling within the ARRC Anchorage Terminal Reserve submitted by RSE and dated April 23, 2019.The eight groundwater Monitoring wells sampled include: MWB08, MWD01, DPD04, MWE04, MWC02, MWE20, MWC01, and MWE11. Monitoring wells MWE04, MWC02, MWE20, MWC01 (all located within ARRC fueling rack and Princess/West tours contaminated sites in the railyard) contained DRO above table C between 1.57 mg/L to 9.09 mg/L. Monitoring wells MWE04 and MWE20 (both located within and downgradient of the ARRC fueling rack) contained RRO above table C between 1.64 mg/L and 3.45 mg/L. Monitoring well MWB08 (located within GW 2/3&4) and MWE04 (ARRC fueling rack) contained VC above TABLE C cleanup levels at 0.510 ug/L and 0.300 ug/L respectively.MWE04 (ARRC fueling rack) contained benzo(a)anthracene and fluorene above table C cleanup levels at 0.330 ug/L and 8.39 ug/L respectively. MWC01 (ARRC Knik Arm Power plant) contained eight PAHs above table C cleanup levels including: benzo (a)anthracene at 1.15 ug/L; benzo[a]pyrene at 1.79 ug/L; benzo[b]flouranthene at 2.54 ug/L; benzo[g,h,i]perylene at 1.59 ug/L; benzo[k]fluoranthene at 0.880 ug/L; chrysene at 2.22 ug/L; dibenzo[a,h]anthracene at 0.403 ug/L; and Indeno[1,2,3-c,d]pyrene at 1.26 ug/L.MWE11 (located east of GW-5/Arctic Cooperage) contained Arsenic above table C cleanup levels at 13.2 ug/L. MWE20 (located downgradient of the fueling rack) contained four metals above table C cleanup levels including: arsenic at 139 ug/L, cadmium 29.4 ug/L, lead at 231 ug/L, and mercury at 2.7g ug/L. Only monitoring wells MWD01 and DPD04, located upgradient adjacent to bluff, did not contain any contaminant concentrations above Table C cleanup levels. |
Grant Lidren |
