• Due Diligence/Regulatory Compliance
• Insurance Claim Evaluation
• Mediation and Litigation Support
• Site Characterization
• Engineering and Remediation Services
• Remedial System Design and Operation
• Marina and Yacht Facility
• Cleanup at Fertilizer Manufacturer
• Steel Slag Fill Site Cleanup
• Former Dry Cleaning Facility
• Skykomish School
• Groundwater Treatment
• Soil Vapor Extraction/Air Sparge
• Construction Support
• Landfill Services
• UST/AST Investigation and Remediation
• Stormwater Management and Spill Prevention Planning
• Vapor Intrusion Investigation and Mitigation

Historic Skykomish School

Skykomish School
BNSF Railway Company, Skykomish, Washington

Angle drilling through a window of the school to assess contamination below the school's foundation

Farallon is working on behalf of BNSF Railway Company to identify the most appropriate technologies to clean up heavy oil contaminants beneath the historic Skykomish School in Skykomish, Washington, located within a petroleum hydrocarbon cleanup site.  The effort is being conducted under a Consent Decree with the Washington State Department of Ecology and requires that the pilot testing and cleanup action be conducted without disrupting School operations.

Farallon evaluated various alternatives to identify cleanup actions that will reduce the quantity of petroleum hydrocarbons beneath and adjacent to the School and the mobility of nonaqueous-phase liquid (NAPL) and soluble components to the extent technically possible.  Evaluation of cleanup alternatives; pilot testing; selection of a cleanup alternative; and cleanup of soil, groundwater, and/or NAPL are required by the Cleanup Action Plan, a component of the Consent Decree.  Mitigating impacts on School operations and the School structure are of primary concern in selecting and implementing a cleanup technology.  Evaluation of cleanup alternatives included researching technical literature; soliciting technical expert, vendor, and stakeholder input; and evaluating the relative performance of each cleanup alternative against School-specific criteria to support the selection of cleanup alternatives that warrant comparative physical testing.

Following the evaluation of cleanup alternatives, two thermal treatment alternatives were selected for pilot testing: hot water/steam flushing and resistive thermal heating.  Farallon prepared a detailed Work Plan for the installation, operation, and monitoring of the pilot testing of both of these alternatives, which began in October 2008.  The pilot tests will develop sufficient information to determine which of the two alternatives will reduce the volume of petroleum hydrocarbons in soil beneath the School to the extent technically possible and remove dissolved-phase petroleum hydrocarbons in groundwater and/or as NAPL, while minimizing and mitigating impacts on the learning environment at the School and on the community as a whole.  The pilot tests will provide sufficient information to enable selection and design of a cleanup action applicable to remediation of soil, groundwater, and NAPL at the School.

The pilot testing will take approximately 3 to 4 months to complete. Cleanup at the School is scheduled to occur in 2011.

Copyright 2011 Farallon Consulting, L.L.C.