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Prosser Airport Aircraft Applicators

SITE DESCRIPTION

The Prosser Airport Aircraft Applicators site is currently an aircraft hangar and surrounding property has been the location of an aerial pesticide applicator operation since prior to 1966.  Investigation revealed areas of stained soil.  Soil sampling confirmed contamination from pesticides (e.g., dinoseb, DDT, dieldrin, and others) and petroleum.  The site is currently owned by the Port of Benton.
 
Some cleanup activities have already occurred.  More extensive sampling has been completed to determine the extent of the contamination.  Excavation of contaminated soils has taken place.  Groundwater monitoring wells have been installed.  Ecology is entering into Agreed Order is an agreement between Ecology and the Port of Benton to agree to complete certain tasks to investigate the site and implement cleanup activities.  Specifically, Ecology is requiring the Port of Benton to complete the cleanup activities currently underway, implement groundwater monitoring, and submit a report documenting the results.  Ecology will oversee the project to ensure that all terms of the Agreed Order are satisfied.

SITE DOCUMENTS

• Fact Sheet
• Agreed Order
• State Environmental Policy Act (SEPA) Checklist
• Determination of Non-Significance (DNS)

Related Information

• Watershed Information for WRIA 31

Additional Resources

• Acronyms used by the Toxic Cleanup Program
• Cleanup Process: Major Steps & Definitions
• Data Submittal Requirements for All Cleanup Sites
• Facility/Site Atlas
• Toxics Cleanup publications