Former Home Depot property, Thousand Oaks
QES provided oversight of ongoing characterization and remediation, including an ozone sparging system for reduction of petroleum-related compounds in groundwater.
For Kinder Morgan Energy Partners, QES managed up to 15 petroleum release remediation projects simultaneously, impacted by gasoline, diesel, jet fuel and fuel oxygenates including MTBE and TBA in soil and groundwater. Sites included remote pipeline release locations across the Central Valley, booster stations, terminals and Port facilities at Carson, Los Angeles Harbor and Stockton.
QES also managed operation and maintenance of the vapour treatment and liquids and groundwater treatment systems at those sites.
Technologies applied
- Excavation
- Soil vapour extraction
- Chemical oxidant injection, including peroxide
- Multi-phase extraction wells and trenches
- Total fluids extraction
- Air sparging and ozone sparging
- Pump-and-treat containment
- Monitored natural attenuation
Representative projects
South El Monte and Whittier Narrows operable units
QES refined the basin-wide San Gabriel numerical CFEST model to design an extraction well network for the Whittier Narrows area, intercepting groundwater contamination migrating toward the Central Basin. Extraction wells have been installed that meet the location, production capacity and construction specifications developed from the modelling effort.
North Hollywood operable unit, San Fernando Valley
At a National Priorities List site, QES critiqued the production performance of a 2,000 gallon per minute extraction well remediation system and evaluated its effectiveness in arresting local trichloroethylene and tetrachloroethylene groundwater contamination.
El Toro Marine Corps Air Station
QES used MODFLOW to evaluate remedial alternatives for groundwater contamination in the Irvine Sub-basin, interpreting lithologic, geophysical, piezometric pressure and groundwater chemistry data from hundreds of production, single point and multiport monitoring wells. The calibrated model was used to develop shallow extraction scenarios balanced with deep groundwater production to contain regional trichloroethylene contamination.
Tell us about the site and the deadline
Call or write and you will speak with the people who will do the work. We will tell you plainly what a defensible path forward looks like.