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Microbes for sustainable remediation of pollution |
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Abandoned Storage Tanks located in Boston, MassachusettsSite SummaryUnderground storage tank (UST) leaks from a former gas station contaminated shallow ground water under a parking lot for a commercial building. The UST contamination was found during trenching for utilities. As the presence of contamination prevented further property development, fast remediation was important to the stakeholders. GeologyThe setting of the site is a complex glacial region where tills and channel deposits are often interbedded. The surface material at the site was mostly interbedded silt and sand lenses. The uppermost ground water was perched over a peat layer. HydrogeologyThe affected aquifer was an unconfined silty sand zone approximately 8 feet thick. Ground Water ContaminationThe size of the groundwater plume as a result of leaching soil contaminants was estimated to be 5,000 square feet. The contamination was mainly diesel-range petroleum constituents, with the highest concentrations in the C9 to C18 range, but there were also scattered detections of xylene, toluene, and ethylbenzene.
ResultsPetrox aerobic bioremediation was implemented in the groundwater. Three units of Petrox (165 gallons) were injected into the contaminated groundwater through vertical injection wells. After a single inoculation of Petrox, the contaminant concentrations were reduced to acceptable levels across the property. The following table shows the overall reduction in both the volatile and semi-volatile range hydrocarbons.
CostThe total cost for Petrox treatment was less than $2,300. |
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Toll Free: 877-257-6588 | Phone: 513-475-6625 | Email: mts@cl-solutions.com
