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You are here: Home / Portfolio / Time-to-Cleanup Modeling – MTBE Plume Remediation, Northern Indiana

Time-to-Cleanup Modeling – MTBE Plume Remediation, Northern Indiana

portfolio typeCase Historiespdf iconDownload this as PDFPosted on December 1, 2009

Challenge

In the spring of 2002 a strong gasoline odor was reported in the drinking water at a small bulk petroleum facility in northern Indiana. Subsequent testing of the water revealed the water on the site contained high levels of gasoline constituents, including benzene and MTBE. Further investigation showed that an elementary school (located 1,700 feet downgradient of the site) serving 450 students had MTBE in its water supply at a level ten times greater than the State drinking water advisory level. The site owner directed Mundell to prepare a Corrective Action Plan to rapidly remediate the petroleum constituents in the site groundwater and in the downgradient plume.

Action

As part of its evaluation, Mundell performed groundwater flow modeling using the software GFLOW to determine the resulting groundwater capture zones from both three- and four-well recovery systems placed along the centerline of the MTBE plume. Contaminant transport modeling using modified 3-dimensional analytical solutions assuming ‘source removals’ at each recovery well location provided estimates of the likely time to achieve drinking water standards.

Results

The groundwater modeling indicated that the time-to-cleanup for the optimal four-well recovery well scenario with discharge of clean water into an infiltration trench would require about 2 to 3 years from the start of active pumping. Actual remedial results since system startup have confirmed the accuracy of these predictions as site groundwater conditions are nearing the achievement of cleanup goals during this time period.

time-to-cleanup-modeling-remediation-scenario

more information Learn about our related services (Modeling) and industry solutions (Petroleum)

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Our Affiliations

- Midwestern States Environmental Consultants Association
- Environmental & Engineering Geophysical Society
- Professional Geologists of Indiana, Inc.
- National Ground Water Association
- American Societies of Chemical / Civil Engineers Engineers without Borders
- Association of Environmental and Engineering Geologists
- Indiana Association for Environmental Professionals
- Geological Society of American
- Indiana Circular Economy Initiative
- Economy of Communion
- Indiana Recycling Coalition

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Consider Worm Composting for Small Spaces

Getting that garden ready? Set up a home for some small, red tiger worms, which you can buy. Be sure to use a wooden box with holes and a lid for a worm compost bin. Add a layer of moist, shredded newspaper and soil for their bedding, and then feed them once a week with vegetable peelings wrapped in newspaper or paper towels. Every two or three months, the rich, fine compost will be ready to use.

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