Site-Specific References
|
|
|
| Title: | Bio-Polymer Construction and Testing of a Zero-Valent Iron PRB at the Somersworth Landfill Superfund Site |
| Author(s): | Krug, T.A., Berry-Spark, K., Monteleone, M, Bird, C., Elder, C., and Focht, R. |
| Citation: | Proceedings of the 2001 International Containment & Remediation Technology Conference and Exhibition, June 2001. |
| Abstract: | This paper describes the construction and subsequent quality assurance testing of a 915 foot long zero-valent iron (ZVI) permeable reactive barrier (PRB) at the Somersworth, NH Sanitary Landfill Superfund Site. The PRB was installed along the downgradient perimeter of the landfill to degrade chlorinated organic compounds in overburden groundwater as part of the Preferred Remedial Action Plan for the Site. The application of a ZVI PRB at this Site is unique because: (1) the PRB was installed immediately downgradient of a landfill; (2) the PRB extends over 40 feet into highly permeable sand with cobbles; and (3) the installation was conducted using an open trench supported by a bio-polymer or BP slurry. The ZVI PRB was installed in 30 to 50 foot long sections separated by metal I-beams, which allowed individual sections to be excavated and backfilled without impacting activities in adjacent sections. The placement of the ZVI was complicated by: (1) the large quantity of ZVI used (over 3,500 tons); (2) the use of different ZVI/sand mixtures along the length of the PRB; and (3) the placement of ZVI/sand mixtures through a BP slurry. Following construction, core samples were obtained from the PRB using a modified Shelby tube method to verify lateral and vertical consistency of the ZVI throughout the PRB. |
|
|
|