Project Highlights

Soil Vapor Extraction (SVE) System Design, Operation, and Management



EIS designed, installed, and is currently operating a soil vapor extraction (SVE) system to remediate contamination associated with a historical dry-cleaning facility in Santa Clara County, California. The site is currently developed with a hotel and thus contaminated site soils could not be remediated by conventional excavation.


EIS designed an SVE system to extract the solvent-laden soil vapor for treatment. The system consists of a series of eight soil vapor extraction wells for contaminant extraction and two granular activated carbon (GAC) vessels for contaminant treatment. The SVE system was installed with minimal disruption to site usage.


EIS managed the system installation from initial permit applications at Regional Water Quality Control Board, Air District, and County Building, Planning, Health and Fire Departments, through contractor selection, construction observation and project coordination, to system completion. In 2017, EIS commenced the system start-up and continued with the implementation of an operation and maintenance (O&M) plan.


Verification sampling results indicate significant reduction of chlorinated solvent contaminant concentrations since the system began operation. EIS currently manages O&M on a weekly basis and conducts mandatory monthly sampling of the SVE system. EIS continues to work closely with regulatory oversight agencies with an eye on achieving site closure in the near future.