Tag Archives: PCE

Dual-Phase Extraction System: Permitting, Design, Construction, and Operation | Industrial Redevelopment Berkeley, CA

Remediation of a former industrial site, Berkeley, CA

The soil and groundwater at a former industrial building located in Berkeley, California were affected with trichloroethene and gasoline. A dual-phase extraction system was permitted, designed, and constructed for site remediation. The site underwent remediation while the developer remodeled and repurposed nearly 500,000 square feet for commercial, retail, office, and light industrial uses.

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Technical Assistance for CERCLA Sites

runwayTechnical support was provided to two groundwater operating units. The operating units are designed to remediate the groundwater impacted with VOCs at two CERCLA sites.

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Environmental Services for the Aerospace Industry


legacy sites

Our project experience includes environmental engineering services for the aerospace industry which includes remediation of former aerospace sites that pre-date World War II (also called legacy sites), and several CERCLA sites located in Southern California. Continue reading

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Groundwater Remediation with Advanced Oxidation

The advanced oxidation process is a technology for the remediation groundwater affected with Benzene-toluene-ethylbenzene-xylenes (BTEX), methyl tert-butyl ether (MtBE), TPH-g, tert-butyl formate (TBF), tert-butyl alcohol (TBA), tert-amyl methyl ether (TAME), diisopropyl ether (DIPE), polyaromatic hydrocarbons (PAHs), trimethylbenzene, 1,4-dioxane, trichloroethylene (TCE), perchloroethylene (PCE), 1,2-dichloroethene (1,2-DCE), 1,1-dichloroethene (1,1-DCE), vinyl chloride, and tetrahydrofuran.
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Closure Plans for Contaminated Sites and Regulatory Closure Negotiations

Closure plans are prepared to supplement work plans for contaminated sites when a property owner is interested in obtaining No Further Action letters from the lead regulatory agency.  Closure plans provide a description of administrative and technical requirements and factors supporting closure, including cleanup goals based on indoor vapor intrusion pathways and groundwater intrusion pathways.  Communicating closure strategy is effective for early regulatory approval.
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Site Closure Plan and Closure Strategy and Regulatory Support, Former Aerospace Site, Southern California

A soil vapor extraction system located at former aerospace site in Southern California had operated for a number of years. The client requested a strategy to obtain regulatory site closure. In response, a site closure plan was prepared outlining a schedule and a list of technical and administrative requirements to support site closure. The closure plan also listed methods and procedures to demonstrate that site-specific cleanup concentrations were protective of human health and groundwater.

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