Site Report: ADOT&PF AMHS Ferry Terminal Ketchikan
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
On 10/13/2010, while removing the existing 550-gallon diesel underground storage tank (UST) that provides fuel for the standby generator at the Ketchikan Ferry terminal, it was discovered that fuel had been leaking from the tank sump and was running down the side of the tank that had contaminated the underlying material. The property consists of imported angular rock fill placed over tideland sediments with an asphalt surface. Any subsurface water is contaminated by salt water intrusion and is not a drinking water resource. Initial excavation efforts removed approximately 27 cubic yards of contaminated soil, which was placed in supersacks and removed from the site pending receipt of laboratory results.
In accordance with 18 AAC 78.090(c)(2)(B), Nortech collected Release Investigation soil confirmation samples from the excavation in locations below and around the former tank and from the excavated contaminated soil. All four confirmation soil samples and the field duplicate collected from the excavation were below the laboratory reporting limit or below the Table B2 migration to groundwater soil cleanup levels for gasoline range (GRO), diesel range (DRO), and residual range (RRO) hydrocarbons and Table B1 benzene, toluene, ethylbenzene, and xylenes (BTEX) volatile compounds. The polycyclic aromatic hydrocarbon (PAH) compound concentrations in the one confirmed sample analyzed were each below the Table B1 migration to groundwater soil cleanup levels. The maximum concentration of DRO in the excavated soil was 7,130 milligrams per kilogram (mg/kg). The excavated soil was not analyzed for PAH compounds. No groundwater was encountered in the excavation.
Action Information
Contaminant Information
| Name |
Level Description |
Media |
Comments |
| DRO |
< Method 2 Most Stringent |
Soil |
In accordance with 18 AAC 78.090(c)(2)(B), Nortech collected Release Investigation soil confirmation samples from the excavation in locations below and around the former tank and from the excavated contaminated soil. All four confirmation soil samples and the field duplicate collected from the excavation were below the laboratory reporting limit or below the Table B2 migration to groundwater soil cleanup levels for GRO, DRO and RRO hydrocarbons and Table B1 BTEX volatile compounds. The PAH hydrocarbon compound concentrations in the one confirmed sample analyzed were each below the Table B1 migration to groundwater soil cleanup levels. The maximum concentration of DRO in the excavated soil was 7,130 milligrams per kilogram (mg/kg). The excavated soil was not analyzed for PAH compounds. No groundwater was encountered in the excavation. |
Control Type
| Type |
Details |
| No ICs Required |
|
Requirements
| Description |
Details |
| Advance approval required to transport soil or groundwater off-site. |
|
No associated sites were found.
