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"A-STREET DITCH" SEDIMENT REMEDIATION PILOT STUDY - WILMINGTON
Delaware Department of Natural Resources and Environmental Control, 5 pp, 2019
Filed Under: Demonstrations
Filed Under: Demonstrations
The A-Street Ditch drains to the South Wilmington Wetland to the Christina River and serves as a pathway/source of PCBs. In conjunction with remedial activities within the wetland, a full-scale pilot project was initiated to minimize recontamination of the wetland by surface water and sediments moving tidally through the system. The pilot is utilizing SediMite™ with the addition of PCB-destroying inoculant to sequester and degrade PCBs in the sediment. The pilot will determine the rate at which PCB degradation/destruction can occur in this system with the added inoculant and whether the technology could be applied at a larger scale. Results of the initial 5-month post-remediation monitoring indicated that total PCB concentrations in surficial sediments, surface water, and porewater dropped by an average of ~25%, ~35%, and~67%, respectively. Additional post-remediation monitoring is scheduled for one year (June 2020) and three years (June 2022) post-application. http://www.dnrec.delaware.gov/dwhs/SIRB/Documents/A%20Street%20Ditch%20Pilot%20Study%20Fact%20Sheet_Final.pdf
See YouTube video for a summary of the project: https://www.youtube.com/watch?v=3tcV6vmJJ8Y
Filed Under: Demonstrations
Filed Under: Demonstrations
The A-Street Ditch drains to the South Wilmington Wetland to the Christina River and serves as a pathway/source of PCBs. In conjunction with remedial activities within the wetland, a full-scale pilot project was initiated to minimize recontamination of the wetland by surface water and sediments moving tidally through the system. The pilot is utilizing SediMite™ with the addition of PCB-destroying inoculant to sequester and degrade PCBs in the sediment. The pilot will determine the rate at which PCB degradation/destruction can occur in this system with the added inoculant and whether the technology could be applied at a larger scale. Results of the initial 5-month post-remediation monitoring indicated that total PCB concentrations in surficial sediments, surface water, and porewater dropped by an average of ~25%, ~35%, and~67%, respectively. Additional post-remediation monitoring is scheduled for one year (June 2020) and three years (June 2022) post-application. http://www.dnrec.delaware.gov/dwhs/SIRB/Documents/A%20Street%20Ditch%20P
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