Liquid Carbonic Carbon Dioxide Sea
Facility Site ID:
8667316
Cleanup Site ID:
5465
Site Discription
The former Liquid Carbonic Carbon Dioxide facility is located at 5021 Colorado Avenue South, Seattle, Washington. The facility was constructed in 1910, and Liquid Carbonic began installing equipment in 1930 for the manufacture of solid and liquid carbon dioxide. The building is currently leased to multiple light industrial and commercial tenants. The property is located in an industrial area of south Seattle.
Soil and groundwater impacted with total petroleum hydrocarbons (TPH) and metals were discovered in 1993 in the vicinity of three underground storage tanks (USTs).
Soil and groundwater impacted with total petroleum hydrocarbons (TPH) and metals were discovered in 1993 in the vicinity of three underground storage tanks (USTs).
Cleanup Activities
A remedial action was conducted in 1996. Approximately 300 cubic yards of petroleum contaminated soil (PCS) was excavated and removed from the Site. Excavation areas included two in the shop area and four in the engine room of the Liquid Carbonic facility.
Samples collected from the limits of the excavations indicated that TPH concentrations remain which exceed the site-specific cleanup levels. Excavation of impacted soil was limited in some areas by the proximity of large compressor foundations and roof support footings.
Protective capping was considered the remedial action for the remaining soil contamination. Asphalt covers the majority of the Site that does not fall under the building footprint.
Samples collected from the limits of the excavations indicated that TPH concentrations remain which exceed the site-specific cleanup levels. Excavation of impacted soil was limited in some areas by the proximity of large compressor foundations and roof support footings.
Protective capping was considered the remedial action for the remaining soil contamination. Asphalt covers the majority of the Site that does not fall under the building footprint.
Regulatory Status
Groundwater monitoring was started in 1995, and continued quarterly as part of the ‘No Further Action’ (NFA) determination and Restrictive Covenant (also known as an Environmental Covenant) filed in 1997. Ecology issued a second NFA determination in August 2000, stating that groundwater monitoring was no longer required at the Site. The Restrictive Covenant was placed to ensure remedy performance and to restrict activities that might result in exposure to contaminants.
This Site was cleaned up through the Independent Remedial Action Program (IRAP), Ecology’s original Voluntary Cleanup Program. This program enabled owners of contaminated sites to meet state cleanup standards independently and to receive technical guidance from Ecology during the process.
This Site was cleaned up through the Independent Remedial Action Program (IRAP), Ecology’s original Voluntary Cleanup Program. This program enabled owners of contaminated sites to meet state cleanup standards independently and to receive technical guidance from Ecology during the process.
2019 Periodic Review
A periodic review is conducted every five years following a cleanup action when institutional controls are used as part of the remedy, as required by the Model Toxics Control Act (MTCA). The purpose of the periodic review is to evaluate current site conditions and to ensure continued protection of human health and the environment.
Periodic Review Results
The remedial actions completed at the Site appear to be protective of human health and the environment.
Soil and groundwater cleanup levels have not been met at the Site; however, the cleanup action was determined to comply with cleanup standards under WAC 173-340-740(6)(f), since the long-term integrity of the containment system is ensured, and the requirements for containment technologies are being met.
The Environmental Covenant for the property is in place and continues to be effective in protecting public health and the environment from exposure to hazardous substances, as well as protecting the integrity of the remedial action.
Based on this periodic review, Ecology has determined that the requirements of the Environmental Covenant continue to be met. No additional cleanup actions are required by the property owner at this time. It is the property owner’s responsibility to continue to inspect the property to assure that the integrity of the remedy is maintained.
Soil and groundwater cleanup levels have not been met at the Site; however, the cleanup action was determined to comply with cleanup standards under WAC 173-340-740(6)(f), since the long-term integrity of the containment system is ensured, and the requirements for containment technologies are being met.
The Environmental Covenant for the property is in place and continues to be effective in protecting public health and the environment from exposure to hazardous substances, as well as protecting the integrity of the remedial action.
Based on this periodic review, Ecology has determined that the requirements of the Environmental Covenant continue to be met. No additional cleanup actions are required by the property owner at this time. It is the property owner’s responsibility to continue to inspect the property to assure that the integrity of the remedy is maintained.
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
Amended Environmental Covenant
County Recording #:
20001023000241
County Recording Date:
10/23/2000
Restrictions/Requirements
- Ongoing Maintenance of Remedy
- Prohibit Removal or Alteration of Existing Buildings
- Prohibit Soil Disturbance
- Restrict Land Use
Restricted Media
- Soil
Documents 5
Legal 2
Document Title | Document Date | Document Type |
Liquid Carbonic - Amendment to Restrictive Covenant | 10/23/2000 | Environmental Covenant; Alternative Mechanism - Amendment |
Liquid Carbonic Restrictive Covenant | 5/23/1997 | Environmental Covenant; Alternative Mechanism |
Technical Reports 3
Document Title | Document Date | Document Type |
Liquid Carbonic Periodic Review Notification | 10/30/2019 | Periodic Review (5 Year) |
Liquid Carbonic Periodic Review | 7/31/2019 | Periodic Review (5 Year) |
Liquid Carbonic Periodic Review | 11/1/2008 | Periodic Review (5 Year) |
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
-
Northwest Regional Office15700 Dayton Ave NShoreline, 98133Please 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 Products-Unspecified | R | |||||
Non-Halogenated Organics - Petroleum-Other | C |
- 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.