El Segundo, California: C3 Treatment of Solvents and Refrigerants

GEO's El Segundo case study describes vapor treatment at a former chemical manufacturing site redeveloped as a shopping and retail center. The contaminants included chloroform, carbon tetrachloride, and CFC and HCFC refrigerants.

Vapor treatment equipment at the El Segundo, California project.

Soil vapor extraction wells were installed beneath building foundations and parking areas during redevelopment. A 2,000-scfm extraction and C3 treatment system collected contaminants from shallow and deep vadose-zone intervals. The case study lists initial off-gas concentrations of 14,000 ppm by volume.

Over 24 months, the system recovered approximately 25,000 pounds of contaminant mass as non-aqueous phase liquid. The source also estimates lower emissions and a shorter treatment duration relative to the alternative vapor-treatment options evaluated for that site. Those comparisons are project-specific estimates.

The documented result is vapor-phase contaminant recovery at this commercial property. It should not be replaced by unrelated groundwater-concentration examples or represented as a citywide cleanup.