BSB Diversified Co Inc

Last updated: May, 2024

We are overseeing cleanup of contamination on the BSB Diversified (BSB) property located at 8202 S 200th St., Kent, WA 98032. We are continuing to monitor the impacted groundwater and cleanup treatments at the facility.

To clean up the facility, BSB must have a special permit, called a Corrective Action Permit. They’ve had a Corrective Action Permit since November 2005.

The BSB cleanup site encompasses three properties:

• BSB Diversified Company, Inc. (BSB)
• Hexcel Corporation (Hexcel)
• J.H. Carr & Sons, Inc. (JH Carr)

At this site, BSB is the main source of the contamination. Hexcel and J.H. Carr & Sons, Inc. are neighboring properties. Contamination from BSB polluted the groundwater.

Other nearby properties are also affected by contamination caused by chemical releases from these companies. All of these properties, including Hexcel, are collectively known as the BSB site.

From 1956 to 1987:

· Activities like manufacturing, plating and metal finishing, caused chemical releases on the BSB site.

· The site’s metal finishing facilities used significant quantities of chlorinated solvents.

· The site used surface impoundments, settling lagoons and container storage to manage, store, and dispose of dangerous waste.

Past operations used a chlorinated solvent, trichloroethylene (TCE), to clean metal parts. TCE spills and leaks contaminated soils and groundwater. Over time, TCE breaks down into cis 1,2-dichloroethylene and vinyl chloride (VC). VC has a very strict cleanup level because it may cause cancer.

Contaminated groundwater is now contained behind an underground clay-soil barrier wall around the entire perimeter of the BSB property. This barrier keeps the contaminated groundwater from leaving the BSB site.

Groundwater and soils are contaminated with chlorinated solvents, degreasing agents:

• trichloroethylene (also known as trichlorethene or TCE)
• vinyl chloride
•  cis-1,2-DCE

Past cleanup actions included:

• excavation and stabilization of metal plating sludges and soils
• excavation of soils contaminated with chlorinated solvents
• groundwater hydraulic barrier designed to prevent migration
• groundwater monitoring slurry wall for groundwater containment

There are six phases in the cleanup process:

1. Remedial investigation
2. Feasibility study
3. Cleanup action plan
4. Cleanup design
5. Cleanup implementation
6. Monitoring and site use controls

We are currently in the monitoring and site use controls phase. Interim actions can occur at any time. There are many opportunities for public comment throughout the cleanup process.

Permit Lite

Periodic Review

Public Participation Plan