SCH Number 2004061131

Project Info

Title

Injection of Ozone at Venice McLaughlin Center

Description

Under the oversight of the Regional Board, Stratus Environmental, Inc. on behalf of the facility and landowners, Mr. Larry Canchola and Mr. Mojdeh Daneshrad respectively, proposes to use C-Sparge™ to remediate the dissolved-phase petroleum hydrocarbon plume beneath the site. The C-Sparge™ technology combines low-flow (3 to 5 cubic feet per minute) air sparging with ozonation to oxidize petroleum hydrocarbons into benign byproducts, carbon dioxide and water. Ozone is generated onsite using a control panel with built-in compressor and ozone generator. Using perforated sparge points, microbubbles (10 to 50 micrometers in diameter) of encapsulated ozone are introduced below the water table, where the oxidation reactions take place. Four injection points, integral to the C-Sparge™ system, will be used onsite within and around the dissolved-phase plume. During the injection, no groundwater will be pumped. Sparging will be performed on a cycled basis with the well cycled on for 5 to 10 minutes. Cycle times (on and off times) will be adjusted, as necessary, to optimize system efficiency. During C-Sparge™ system operations, microbubbles of encapsulated ozone will be discharged into the subsurface beneath the site. No other known constituents will be discharged to the subsurface during system operations. The C-Sparge™ system will inject approximately five grams per hour of ozone at a flow rate of 3 to 5 cfm. Therefore, the total concentration of ozone injected into the subsurface during the system operations will be approximately 0.59 milligrams per liter.

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