Laboratory phase behavior and soil column experiments were conducted using branched alcohol propoxy sulfate surfactants to evaluate their effectiveness in removing gasoline and diesel range hydrocarbons from contaminated groundwater. Very low residual oil saturations were achieved with a much smaller amount of surfactant than typically required in surfactant enhanced aquifer remediation (SEAR). This type of surfactant has been shown to be both robust and efficient even when used at low temperatures and without co-solvent.

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