| Action Date |
Action |
Description |
DEC Staff |
| 10/13/1989 |
Site Characterization Report Approved |
On this date, Shannon and Wilson submitted an monitoring wells and oil collection gallery Ship Creek Railroad Yard report dated August 1989. The 15 new wells didn't identify any new areas where ground was badly contaminated other that already identified.Groundwater Contamination up to 18.9 mg/L benzene, 40.9 mg/L ethylbenzene, and 9.79 mg/L toluene. Boring B-9 has consistently had a floating product layer. Additionally, a collection gallery was installed with a total length of 86 feet and orientated in an east to west direction. The gallery is composed of 36 inch diameter CMP with a vertical manhole recovery point in the center. Reportedly, absorbent boom is kept in the pipe as a passive recovery measure. The collection gallery is located just south of the railroad tracks and east of the A Street Bridge. (see file: 2100.38.033 ARRC Ship Creek Rail Yard Seep) |
Grant Lidren |
| 8/25/1992 |
Document, Report, or Work plan Review - other |
On this date, ADEC received Level I & II Environmental Site Assessment & Geotechnical Recommendations Princess Tours / Westours Leasehold Properties ARRC, submitted by AGRA and dated July 1992. The site investigation was conducted on the Princess and West tours lease areas immediately south of the ARRC rail car building. Furthermore, according to the report, the area is used for out-of-service rail car storage and steam-cleaning track for rail cars. Ten soil borings were advanced Four of which were completed as MWs. In general, contaminated soil was encountered from 5 to 18 ft. bgs and contained up to 13,000 mg/kg TPH which was located at the GW interface. Groundwater samples collected from the four MWs contained TPH up to 1,200 mg/L. |
Grant Lidren |
| 9/9/1992 |
Update or Other Action |
(Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). Site is being leased to Tour Alaska, Inc. for relocation of their Princess Tours rail car washing facility from another ARR site to this location. |
Former Staff |
| 9/9/1992 |
Update or Other Action |
(Old R:Base Action Code = NOR - Notice of Release Letter (LUST)). |
Former Staff |
| 4/12/1994 |
Update or Other Action |
On this date, ADEC received the Sampling Report for ARRC/Princess Tours & Westours construction project, submitted by ARRC, dated April 12, 1994. Reportedly 1,700 cubic yards of contaminated soil was removed and remediated. The soil sampling for the project was divided into three areas: 12 samples were collected from the Princess Tours rail car storage and steam-cleaning area; six samples were collected from the Westours rail car storage and steam-cleaning area; and two samples were collected for the Princess Tours Building Foundation. Soil samples collected from the Westours area contained DRO up to 3,170 mg/kg. Soil samples collected from the Princess Tours area and Princess Tours Building Foundation did not contain contaminants above ADEC cleanup levels. |
Grant Lidren |
| 6/3/1994 |
Update or Other Action |
Letter from ARR with final sampling results informing ADEC that excavated contaminated soil will be thermally treated. |
Eileen Olson |
| 12/13/1994 |
Update or Other Action |
ADEC received test results for thermally treated soil from the site. |
Eileen Olson |
| 3/15/2001 |
Site Characterization Report Approved |
ADEC received the Environmental Baseline Assessment RCT Railyard Facility submitted by Shannon & Wilson, dated March 2001. This baseline was conducted in preparation of a new Royal Crown Tours facility and parking lease area (aka the Wilderness Express Shop). This area is located directly south of the Westours lease area. Ten soil borings were advanced with six completed as temporary monitoring wells. Borings were advanced to a depth between 12.7 to 35 feet bgs. Soil samples collected from six of the ten soil borings, at a depth of 2.5 feet to 14.5 feet bgs, did not contain contaminant concentrations above ADEC cleanup levels. However, at three of these borings, a hydrocarbon odor was noted at the groundwater interface and two of the borings contained a sheen on the groundwater. Groundwater was encountered 12.7 to 14.4 feet bgs. Groundwater samples collected contained TCE at 3.3 ug/L (collected from location of former railroad-car paint building), DRO up to 79.9 mg/L( collected from the location of a proposed fuel tank), RRO up to 1.19 mg/L, mercury up to 43.3 ug/L, lead up to 1270 ug/L, chromium up to 2740 ug/L, barium up to 1580 ug/L, cadmium up to 3730 ug/L, selenium up to 57.2 ug/L, and arsenic up to 1390 ug/L |
Grant Lidren |
| 3/27/2007 |
Exposure Tracking Model Ranking |
Initial ranking |
Bill O'Connell |
| 5/21/2015 |
Update or Other Action |
On this date, ADEC received the Environmental Investigation, Modeling and Pipe Recommendations for the ARRC Anchorage Terminal Reserve Waterline Rehabilitation Project, submitted by RSE and dated December 2014. As part of this investigation, borehole TB-8 completed as a temporary MW was advanced adjacent and east of Princess Tours lease. Soil samples collected at 10 feet bgs contained DRO at 261 mg/kg and benzene at 0.036 mg/kg. Soil samples collected at the GW interface at 13.5 feet bgs contained TCE at 0.0799 mg/kg and DRO at 3,370 mg/kg. Groundwater samples collected contained DRO at 5.42 mg/L and RRO at 3.27 mg/L. |
Grant Lidren |
| 6/27/2018 |
Update or Other Action |
On this date, historic contamination was encountered during a PPR response to a diesel spill from a Delta Western Truck at the ARRC yard (spill # 18239919201). The initial spill point was located just behind the Wilderness Express shop (f.k.a Royal Crown Tours facility and parking lease area - see 2001 action comments) adjacent to an above ground HOT. During this spill response, the apparent historic contamination was encountered 1 to 1.5 feet bgs evident by olfactory and visual evidence. Once the assumed Delta Western contamination was cleaned up, the excavation was backfilled due to the fact that it was a high traffic area and a small enough area for it not to be a problem to re excavate the site. |
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 |
