Tag Archives: VOCs

Dual Phase Extraction System, Permitting Design, and Construction | Berkeley CA

A former industrial building located in Berkeley, California was impacted with Chlorinated Volatile Organic Compounds (CVOCs), including trichloroethene (TCE) and cis-1,2-dichloroethylene (cis-1,2-DCE); total petroleum hydrocarbons as gasoline (TPH-g), Dense Non-Aqueous Phase Liquid, and (DNAPL) and Light Non-Aqueous Phase Liquid (NAPL). A dual phase extraction system was permitted for site remediation.

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Air Sparge | Technology Description

Air Sparge
Air sparge is an in situ groundwater remediation technology were air is injected into the groundwater to increase dissolved oxygen. Air sparge is used to remediate impacted groundwater with volatile organic compounds (VOCs), most commonly gasoline range organics.

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Soil Vapor Extraction | Technology Description

Soil Vapor Extraction
Soil Vapor Extraction (SVE) is an in situ remediation technology designed to remediate soils impacted with volatile organic compounds (VOCs) including gasoline, and chlorinated hydrocarbons. This technology works by extracting soil vapor at a high vacuum using subsurface wells, then treating the soil vapor prior to discharge.

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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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Advanced Oxidation using Ultraviolet Light and Hydrogen Peroxide

Advanced oxidation systems using hydrogen peroxide (peroxide) and ultraviolet (UV) light are designed to inject hydrogen peroxide in controlled ratios to the water, then mixing the peroxide, and exposing the water and peroxide solution to UV radiation to form hydroxyl radicals (•OH). Peroxide and hydroxyl radicals are strong oxidizing agents capable of oxidizing 1,4-dioxane and several volatile organic compounds (VOCs). The advanced oxidation process is suitable for groundwater remediation with pump-and-treat, water treatment, and industrial wastewater treatment. Treatment with UV/Peroxide may offer technical advantages over ozone based treatment systems.

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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 … Continue reading

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Treatment of Groundwater Impacted with 1,4-Dioxane, Westlake Village, California

Advanced Oxidation of 14 Dioxane
The development plan for a former media manufacturing site impacted with volatile organic compounds (VOCs) and 1,4-Dioxane in groundwater included the construction of a large development in Westlake Village California. A feasibility study concluded that a pump-and treat system consisting of an advanced oxidation process combined with liquid phase activated carbon (LPGAC) was required. The follow-up work included preparing a detailed design, preparing NPDES permits for storm water discharge, process flow diagrams, layout diagrams, and process and instrumentation diagrams. Continue reading

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