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Performance Monitoring of a Permeable Reactive Barrier at the Somersworth, New Hampshire Landfill Superfund Site

2002; American Chemical Society; Linguagem: Inglês

10.1021/bk-2002-0837.ch017

1947-5918

Timothy M. Sivavec, Thomas A. Krug, Karen Berry-Spark, Robert Focht,

Landfill Environmental Impact Studies

Over a six-month period, the performance of a pilot-scale, zero-valent iron permeable reactive barrier (PRB) at the Somersworth, NH Sanitary Landfill Superfund Site was evaluated. The 21-ft long x 34-ft deep x 28-inch wide PRB was installed in November 1999 to test a construction technique that used a biodegradable polymer slurry to support an open excavation while a granular iron/sand mixture was placed into the subsurface. Criteria used to assess the PRB's performance included (1) hydraulic testing to evaluate potential fluid viscosity effects related to the use of the biopolymer, (2) monitoring of VOCs, groundwater parameters (TOC, TDS, pH, DO, ORP, specific conductance, viscosity) and inorganic parameters (including metals, major ions and nutrients), (3) microbial characterization of groundwater, (4) reactivity testing of cored iron material, and (5) advanced surface analysis of cored iron material.