Mt Adams Ranger District
Facility Site ID:
8475279
Cleanup Site ID:
7793
The Mt Adams Ranger Station site is used as a visitor center, barracks, and maintenance yard.
In October 1988, three underground storage tanks (USTs) were removed from the site. The 1,000-gallon diesel, 1,000-gallon leaded gasoline, and 3,000-gallon unleaded gasoline tank had been installed shortly after a gas house/storage shed was built in 1962. The UST excavation did not include the area under asphalt in front of the gas house or near the pump islands at this time due to budgetary restrictions. The UST excavation could not exceed 8 feet deep due to the presence of basalt. In fact, it appeared as though the basalt was blasted to allow for the USTs to be installed.
Six soil samples were collected from the base and sidewalls of the UST excavation. Gasoline and diesel was detected in most of the samples. Approximately, 30 cubic yards of contaminated soil were removed and placed on plastic with plastic cover about 1,000 feet away. No further excavating in this area was possible due to the bedrock layer and no groundwater was encountered.
In 1995, further investigation of soil contamination was initiated because a gas smell was discovered during water pipe repairs in 1980. Since no containment methods were used in the gas house, which stored containers of lubricants, diesels, gasoline, and mixed fuels, the Forest Service assumed that the historic use of this building was likely the source of some contamination.
In 1995, the Forest Service removed piping associated with the UST system and 50 cubic yards of petroleum contaminated soil. The depth of the excavation was limited to 4 feet below ground surface due to underlying bedrock. Nine soil samples were collected and analyzed for gas-range total petroleum hydrocarbons and BTEX. Samples results were below Model Toxics Control Act (MTCA) cleanup levels.
Based on the information presented in the reports, the geological conditions, and depth to groundwater, any residual petroleum contaminated soil at the site is not expected to pose a threat to human health or the environment through direct contact, ingestion or groundwater. Ecology made a no further action determination in August 2011.
In October 1988, three underground storage tanks (USTs) were removed from the site. The 1,000-gallon diesel, 1,000-gallon leaded gasoline, and 3,000-gallon unleaded gasoline tank had been installed shortly after a gas house/storage shed was built in 1962. The UST excavation did not include the area under asphalt in front of the gas house or near the pump islands at this time due to budgetary restrictions. The UST excavation could not exceed 8 feet deep due to the presence of basalt. In fact, it appeared as though the basalt was blasted to allow for the USTs to be installed.
Six soil samples were collected from the base and sidewalls of the UST excavation. Gasoline and diesel was detected in most of the samples. Approximately, 30 cubic yards of contaminated soil were removed and placed on plastic with plastic cover about 1,000 feet away. No further excavating in this area was possible due to the bedrock layer and no groundwater was encountered.
In 1995, further investigation of soil contamination was initiated because a gas smell was discovered during water pipe repairs in 1980. Since no containment methods were used in the gas house, which stored containers of lubricants, diesels, gasoline, and mixed fuels, the Forest Service assumed that the historic use of this building was likely the source of some contamination.
In 1995, the Forest Service removed piping associated with the UST system and 50 cubic yards of petroleum contaminated soil. The depth of the excavation was limited to 4 feet below ground surface due to underlying bedrock. Nine soil samples were collected and analyzed for gas-range total petroleum hydrocarbons and BTEX. Samples results were below Model Toxics Control Act (MTCA) cleanup levels.
Based on the information presented in the reports, the geological conditions, and depth to groundwater, any residual petroleum contaminated soil at the site is not expected to pose a threat to human health or the environment through direct contact, ingestion or groundwater. Ecology made a no further action determination in August 2011.
Documents 1
Technical Reports 1
| Document Title | Document Date | Document Type |
| Mt Adams Ranger District NFA recommendation | 8/26/2011 | Site Specific Administrative Document - Other (Administrative Correspondence) |
There may be more documents related to this site. To obtain documents not available electronically, you will need to make a public records request.
Places to see print documents
-
Central Regional Office1250 W Alder StUnion Gap, 98903-0009Please schedule an appointment to view print documents at this location.
Contaminants 2
| Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
|---|---|---|---|---|---|---|
| Non-Halogenated Organics - Petroleum-Diesel | RB | |||||
| Non-Halogenated Organics - Petroleum-Gasoline | RB |
- S
- Suspected
- C
- Confirmed Above Cleanup Levels
- B
- Below Cleanup Levels
- RA
- Remediated-Above
- RB
- Remediated-Below
- R
- Remediated
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.