Environmental Engineering Reference
In-Depth Information
12
Case Study of PRB Application for the
Remediatio
n of Groundwater
James Stening
CONTENTS
12.1 Introduction .............................................................................................. 249
12.2 Background ............................................................................................... 250
12.3 Selected Site ............................................................................................... 254
12.4 Laboratory Column Trials ....................................................................... 256
12.5 Pilot-Scale Barrier Design ....................................................................... 257
12.6 Groundwater Sampling and Analysis................................................... 263
12.7 Groundwater Monitoring Results .......................................................... 264
12.7.1 Hydraulic Analyses ...................................................................... 264
12.7.2 Organic Analyses ......................................................................... 264
12.7.3 Inorganic Analyses ...................................................................... 267
12.8 Analysis of Iron Cores ............................................................................. 267
12.9 Full-Scale Reactive Iron Barrier Assessment ........................................ 268
12.10 Additional Sampling and Analysis ....................................................... 270
12.11 Conclusions ............................................................................................... 273
References ............................................................................................................. 273
12.1 Introduction
In February 1999, Orica Australia Pty Ltd (Orica) constructed the first reac-
tive iron barrier in Australia, and indeed in the Southern Hemisphere.
Although at that time it was the 36th such barrier that the technology licen-
sors, EnviroMetal Technologies, Inc. (ETI), had designed, it was the first time
they had designed one for such high volatile chlorinated hydrocarbon (CHC)
concentrations in a high-sulfate low-pH aquifer.
It was also one of the first times Orica had undertaken a groundwater reme-
diation project. In October 1996, Orica's predecessor, ICI Australia Pty Ltd
*
*
When the parent company ICI plc in the United Kingdom divested its major shareholding
in ICI Australia in 1997, a new independent Australian company was formed, which became
known as Orica in February 1998.
249
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