Yakima Railroad Area groundwater performance monitoring

Twice a year, we collect groundwater samples in a 6-square-mile industrial area that parallels the railroad corridor in the cities of Yakima and Union Gap where concentrations of tetrachloroethene (PCE) continue to exceed the state Model Toxics Control Act (MTCA) cleanup level.

Monitoring groundwater cleanup activities

Map of Yakima Railroad Area covers approximately six square miles of predominantly industrial and commercial property adjacent to the railroad corridor in the cities of Yakima and Union Gap.

Yakima Railroad Area study extent

In the 1980s, tetrachloroethene (PCE)-contaminated soil and groundwater was discovered at multiple facilities along the predominantly industrial and commercial corridor known as the Yakima Railroad Area. Cleanup activities at several of these source areas have been implemented over the years.

The primary purpose of this monitoring is to evaluate the effectiveness of these cleanup actions at reducing the contaminant concentrations in the groundwater. The data may also be used to identify areas of contamination that require further action. Groundwater samples will continue to be collected semi-annually to monitor PCE concentrations in the project area.

Use this database to learn more about this project, using the following site facility information.

  • Facility/Site ID number: 500
  • Cleanup Site ID number: 3632
  • Environmental Information Management database Study ID: YRRA

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