Woodlands at Redondo Creek
Facility Site ID:
51842
Cleanup Site ID:
15345
Property Background
Location
Woodlands at Redondo Creek development is located on one King County parcel in Federal Way, Washington.
History
The 21.12-acre property was undeveloped and forested prior to cleanup and development. Edgewood Terrace Estates LLC (Edgewood) plans to develop this property into multi-family residential housing with associated parking, landscaping, and utilities.
Why did the Property need cleanup?
In April 2019, soil testing found the surface soil was contaminated with Arsenic. This contamination is likely a result of air pollution from the former Asarco smelter in Tacoma. Air pollution from the smelter settled on the surface soil over more than 1,000 square miles of the Puget Sound basin. The contaminated area is known as the Tacoma Smelter Plume and is managed under the Asarco Tacoma Smelter Site. Arsenic and lead in soil can cause adverse health effects with long-term exposure. Developers within the Tacoma Smelter Plume are encouraged to cleanup properties within the plume during development. Ecology provides free Technical Assistance to developers.
Woodlands at Redondo Creek development is located on one King County parcel in Federal Way, Washington.
History
The 21.12-acre property was undeveloped and forested prior to cleanup and development. Edgewood Terrace Estates LLC (Edgewood) plans to develop this property into multi-family residential housing with associated parking, landscaping, and utilities.
Why did the Property need cleanup?
In April 2019, soil testing found the surface soil was contaminated with Arsenic. This contamination is likely a result of air pollution from the former Asarco smelter in Tacoma. Air pollution from the smelter settled on the surface soil over more than 1,000 square miles of the Puget Sound basin. The contaminated area is known as the Tacoma Smelter Plume and is managed under the Asarco Tacoma Smelter Site. Arsenic and lead in soil can cause adverse health effects with long-term exposure. Developers within the Tacoma Smelter Plume are encouraged to cleanup properties within the plume during development. Ecology provides free Technical Assistance to developers.
Property Cleanup
How was the Property cleaned up?
In January 2021, ECI Environmental Consulting developed a cleanup action plan for the Property on behalf of Edgewood. The cleanup action plan selected soil excavation and disposal as a way to remediate the Tacoma Smelter Plume contamination. Ecology agreed with the cleanup approach and issued and opinion on the proposed cleanup in March 2021.
In June 2021, Edgewood remediated the Property during its development. They excavated the contaminated surface soil from one location where arsenic exceeded the state cleanup level and transported it to an approved landfill.
How do we know if the cleanup was satisfactory?
In 2021 Edgewood joined the Voluntary Cleanup Program with Ecology, requesting an opinion on the cleanup of this Property. They provided Ecology with a cleanup report containing the results of the soil sampling after the cleanup. They sampled the soil under the excavated areas. The lead and arsenic levels met the cleanup standards for unrestricted land use. Ecology determined that the Property was cleaned to satisfy state requirements and issued a No Further Action determination in February 2022.
In January 2021, ECI Environmental Consulting developed a cleanup action plan for the Property on behalf of Edgewood. The cleanup action plan selected soil excavation and disposal as a way to remediate the Tacoma Smelter Plume contamination. Ecology agreed with the cleanup approach and issued and opinion on the proposed cleanup in March 2021.
In June 2021, Edgewood remediated the Property during its development. They excavated the contaminated surface soil from one location where arsenic exceeded the state cleanup level and transported it to an approved landfill.
How do we know if the cleanup was satisfactory?
In 2021 Edgewood joined the Voluntary Cleanup Program with Ecology, requesting an opinion on the cleanup of this Property. They provided Ecology with a cleanup report containing the results of the soil sampling after the cleanup. They sampled the soil under the excavated areas. The lead and arsenic levels met the cleanup standards for unrestricted land use. Ecology determined that the Property was cleaned to satisfy state requirements and issued a No Further Action determination in February 2022.
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.
Documents 13
Technical Reports 7
| Document Title | Document Date | Document Type |
| Cleanup Action Report, Woodlands at Redondo Creek | 12/6/2021 | Remedial Action Report |
| Edgewood Terrace Estates - Amendment to Arsenic Cleanup Action Plan | 1/27/2021 | Cleanup Action Plan |
| Amendment to Cleanup Action Pla | 1/27/2021 | Cleanup Action Plan |
| Edgewood Terrace Estates - Cleanup Action Plan, Arsenic & Lead Mitigation Project, King County Parcel: 0421049012 | 1/14/2021 | Cleanup Action Plan |
| Edgewood Terrace Estates - Focused Arsenic & Lead Soil Assessment, King County Parcel 0421049012 | 1/11/2020 | Site Specific Technical Document - Other |
| Edgewood Terrace Estates - Arsenic & Lead Soil Assessment, King County Parcel 0421049012 | 7/17/2019 | State Initial Investigation Report |
| Edgewood Terrace Estates - Arsenic & Lead Soil Screening, King County Parcel 0421049012 | 5/1/2019 | State Initial Investigation Report |
Voluntary Cleanup Program 6
| Document Title | Document Date | Document Type |
| Woodlands at Redondo Creek - NW3302 - Property NFA - FA at SiteLikely | 2/9/2022 | VCP Opinion on Property Cleanup – NFA |
| Woodlands at Redondo Creek - NW3302 - Property NFA Likely | 3/19/2021 | VCP Opinion on Property Cleanup – Other |
| Woodlands at Redondo Creek - NW3302 - VCP Acceptance (CORRECTED) | 2/23/2021 | VCP Administrative Document |
| Edgewood Terrace Estates - NW3302 - VCP Acceptance | 2/22/2021 | VCP Administrative Document |
| Woodlands at Redondo Creek - NW3302 - VCP Agreement | 1/28/2021 | VCP Administrative Document |
| Woodlands at Redondo Creek - NW3302 - VCP Application | 1/14/2021 | VCP Administrative Document |
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
-
Southwest Regional Office300 Desmond Dr SELacey, 98503-1274Please schedule an appointment to view print documents at this location.
Contaminants 2
| Contaminant Type | Soil |
Groundwater |
Surface Water |
Air |
Sediment |
Bedrock |
|---|---|---|---|---|---|---|
| Metals - Arsenic | RB | |||||
| Metals - Lead | B |
- 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.