Avista Corp Spokane Service Center
Cleanup Complete
Site History
Cleanup began in 1994 with the removal of hydraulic lifts within the garage building and partial removal of soil impacted with diesel- and oil-range petroleum hydrocarbons and polycyclic aromatic hydrocarbons (PAHs).
About 3,792 tons of additional soil was removed when the garage building was demolished in 2018, but full removal was not possible without impacting the structural integrity of nearby buildings and utilities. A geosynthetic liner was installed to cap the residual contaminated soil, and a drainage pipe trench was constructed to divert stormwater to an onsite infiltration basin. You can learn more in the Remedial Action Report.
Five groundwater monitoring wells were installed and sampled quarterly from December 2019 through February 2021, which showed that remaining soil contamination was not affecting groundwater quality. An environmental covenant was recorded with Spokane County in April 2022 to document the cleanup and restrict site use to avoid exposing remaining soil contamination.
Ecology then decided that no further action is required to clean up contamination at the property.
Voluntary Cleanup Program
This site was cleaned up under our Voluntary Cleanup Program, which provides technical help to owners of contaminated sites.
Voluntary Cleanup Program customers pay fees to cover our costs for technical help and reviewing cleanup reports. Sites in this program must meet the same cleanup standards as the sites Ecology manages under legal orders.
Site use restrictions called institutional controls are in effect
Institutional controls can be fences, signs, or restrictions on how the property is used. For instance, an institutional control may prohibit installing drinking water wells or disturbing a protective cap that isolates contamination. These restrictions keep the contamination contained and keep people from being exposed to the contamination. The controls are usually listed in environmental covenants recorded with the county.
Periodic reviews are required when institutional controls are required at a site. Ecology conducts reviews to make sure the controls remain effective and the cleanup still protects human health and the environment. We conduct periodic reviews about every five years.
Institutional Controls 1
Environmental Covenant
Restrictions/Requirements
- Control Stormwater
- Prevent the Reuse or Relocation of Site Soil
- Prohibit New Building Construction
- Prohibit Soil Disturbance
- Restrict Land Use
Restricted Media
- Soil
Documents 14
Legal 1
Document Title | Document Date | Document Type |
Avista Corp Spokane Service Center- Environmental Covenant #7201723 | 4/26/2022 | Environmental Covenant; Alternative Mechanism |
Technical Reports 10
Voluntary Cleanup Program 3
Document Title | Document Date | Document Type |
Avista Corp Spokane Service Center- VCP Opinion on Site Cleanup- No Further Action | 12/20/2022 | VCP Opinion on Site Cleanup – NFA |
Avista Corp Spokane Service Center- VCP Opinion on Site Cleanup- Further Action Required | 3/31/2021 | VCP Opinion on Site Cleanup – Other |
Avista Service Center- VCP Opinion on Site Cleanup- Further Action Required | 5/9/2019 | Voluntary Cleanup Program Opinion – Other |
Places to see print documents
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Eastern Regional OfficeN 4601 Monroe StSpokane, 99205-1265Please schedule an appointment to view print documents at this location.
Contaminants 7
Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
---|---|---|---|---|---|---|
Metals - Metals - Other | RB | |||||
Non-Halogenated Organics - Polycyclic Aromatic Hydrocarbons | RA | RB | ||||
Metals - Arsenic | RB | |||||
Metals - Lead | RB | |||||
Non-Halogenated Organics - Petroleum-Diesel | RA | RB | ||||
Non-Halogenated Organics - Petroleum-Gasoline | RB | |||||
Non-Halogenated Organics - Petroleum-Other | RA | RB |
- S
- Suspected
- C
- Confirmed Above Cleanup Levels
- B
- Below Cleanup Levels
- RA
- Remediated-Above
- RB
- Remediated-Below
- R
- Remediated