Avista Corp Spokane Service Center

1411 E Mission Ave Machine Shop Spokane, Spokane County
Facility Site ID: 31739484 Cleanup Site ID: 3512

More about cleanup

Cleanup Complete

Ecology decided cleanup is complete at this cleanup site after as much contaminated soil as possible was removed and groundwater samples met water quality standards. Remaining contaminated soil that couldn’t be removed without damaging buildings or utilities was capped with a protective liner and a drainage system was installed to direct rain and snow melt away. An environmental covenant was filed to document the remaining soil contamination.

Site History

The Avista Corporation used the property as a garage facility for their vehicles.

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.

Environmental Covenant

County Recording #: 7201723
County Recording Date: 4/26/2022

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
Places to see print documents
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
Document Title Document Date Document Type
Avista Corp Spokane Service Center- Operation and Maintenance Plan 10/20/2022 Operation and Maintenance Plan
Avista Service Center Garage- Quarterly Groundwater Monitoring Report- February 2021 2/22/2021 Groundwater Monitoring Report
Quarterly Groundwater Monitoring Report- July 2020 8/12/2020 Groundwater Monitoring Report
Avista Service Center Garage Liner Repair and Groundwater Monitoring Report 2/14/2020 Interim Action Documents
Monitoring Well Installation and July 31, 2019 Groundwater Monitoring Report 9/13/2019 Groundwater Monitoring Report
Avista Corp Spokane Service Center- VCP Application Packet 4/15/2019 Site Specific Administrative Document - other (Administrative correspondence)
Avista Corp Spokane Service Center- Terrestrial Ecological Evaluation 3/22/2019 Terrestrial Ecological Evaluation
Avista Corp Spokane Service Center- Remedial Action Report Appendices 3/22/2019 Site Specific Technical Document - other
Avista Corp Spokane Service Center- Remedial Action Report 3/22/2019 Remedial Action Report
Avista Corp Spokane Service Center Site Hazard Assessment 8/1/1998 Site Hazard Assessment Report
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
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

  • Eastern Regional Office
    N 4601 Monroe St
    Spokane, 99205-1265
    Please 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
This contaminant list was based on our best information at the time it was entered. It may not reflect current conditions at the site.