Using Solar-Powered Groundwater Recirculation to Enhance ...

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Kennedy Space CenterCenter Operations DirectorateERD Groundwater IMMedical & Environmental Management Division♦ Purpose: Remediate groundwater downgradient ofthe former source area with elevated VOCconcentrations:‣ Approximately 3,000 ft 2 area‣ VOCs focused in 10-21 ft below land surface (bls) depthinterval‣ Screening considered USEPA Green remediation BMPs‣ Bench-scale treatability testing performed‣ ERD with biostimulation, bioaugmentation and integration ofsolar-powered groundwater recirculation selected♦ Corrective Action Objective (CAO): Reduce VOCconcentrations in the IM treatment zone to less than300 µg/L TCE, 700 µg/L cDCE, and 100 µg/L vinylchloride6
Kennedy Space CenterCenter Operations DirectorateERD IM Compared to GreenRemediation Core ElementsMedical & Environmental Management Division♦ Energy:‣ Limited construction energy use‣ Solar system for groundwater recirculation‣ Minimal O&M♦ Air Emissions:‣ In Situ treatment technology‣ Lower CO 2 operational emissions than air sparge and P&T alternativesconsidered♦ Materials Management/Waste Reduction:‣ No ongoing water use‣ Reusable solar pumps/panels‣ Majority of drilling work via DPT (limited IDW generation)‣ Minimal waste stream associated with cleanup efforts‣ Approval to place sampling water in closed-loop recirculation system (no IDW)‣ Limited impacts to land and ecosystem associated with system/construction7
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