Remediation System Design Petroleum Retail Stations




Project Details

With the goal of reducing the volume or toxicity level of contaminants and hazardous materials by using tested in-situ remedial technologies, ETIC’s engineering department evaluates site data and then proposes site-specific solutions to achieve regulatory approval.

Our Approach

ETIC’s engineering department works closely with our remedial investigation/feasibility study department select and design customized remediation solutions from proven technologies. We are experienced with a wide range of contaminants, including petroleum hydrocarbons, fuel oxygenates (including MTBE), volatile organic compounds, and metals.

ETIC has designed, tested, installed, and operated over 30 remediation systems at operating petroleum retail stations.  Our engineers have worked around numerous access, permit, regulatory, and stakeholder constraints and to design proven and emerging remediation technologies, including:

  • Soil vapor extraction and treatment
  • Groundwater extraction and treatment
  • Dual-phase (simultaneous soil and groundwater) extraction
  • Air sparging
  • Bioventing, bioslurping, and ex-situ bioremediation

Selected Project Experience

Petroleum Hydrocarbon-Impacted Site, West Sacramento, CA

A high vacuum multi-phase extraction pilot test was conducted to evaluate feasibility of this technology for remediation.  The onsite groundwater extraction system was subsequently upgraded to include a high-vacuum extraction system to extract soil vapor and groundwater.  A catalytic oxidizer was used for vapor treatment and carbon was used for groundwater treatment.  The site groundwater concentrations decreased significantly in two years of system operation and the site is being considered for closure.

Petroleum Hydrocarbon-Impacted Site, LaHabra, CA

Three in-situ chemical oxidation (ISCO) events were performed using sodium persulfate activated with either chelated iron or hydrogen peroxide.  ISCO was chosen based on site concentrations, site access constraints, and time constraints due to site development activities.  Groundwater monitoring results 1 week after the third injection event indicated reduction of up to 97 percent average concentration of hydrocarbons in the wells.

Client: ExxonMobil Oil Corporation
Location: Various locations throughout California
Duration of Project: 1999 – present

  • Pilot and Treatability Studies
  • Remediation System Design and Permitting
  • Treatment System Upgrades and Retrofits
  • Permit Compliance