Soil and Groundwater Remediation, ATI Transport, Inc., Peshastin, Washington

JBR was contracted to direct the investigation and cleanup of a gasoline tanker spill in Peshastin, Washington. An early morning accident involving a gasoline tanker resulted in the release of gasoline along a 600-foot section of Washington State Highway 97N. Emergency response actions removed approximately 1,000 cubic yards of soil. JBR staff directed soil removal actions, field screened soils, and collected samples for laboratory analyses. At the northern end of the spill area, gasoline contaminants were discovered in contact with groundwater. JBR immediately implemented a program to provide drinking water to users of a domestic water well located 100-feet west of the groundwater contamination, and directed the installation of a carbon treatment system for the water well.

A remedial investigation was initiated and three groundwater monitoring wells were installed. A remediation system consisting of soil vapor extraction and air sparging was permitted and installed within 30-days of the release. Groundwater monitoring results indicated the cleanup goals had been achieved within 90 days of remediation start-up. Following four consecutive quarters of compliance monitoring a NFA letter was requested from the Ecology. Nineteen months following the tanker spill a NFA letter was issued by Ecology.

• Rebekah Brooks, LG, LHG - Division Manager -