Geoenvironment Impact Mitigation and Management - Sustainable Practices in Geoenvironmental Engineering - page 392

10.9 Evidence of Success
Evidence of success (EOS) is a requirement speciied by Yong and Mulligan (2004) as testi-
mony to the success of utilization of NA as a tool for remediation of contaminated sites.
Although monitoring is a necessity in application of MNA, there is a need for one to have
knowledge of whether the “signs and signals” (i.e., indicators) registered in the monitoring
program testify to a successful MNA treatment program. In essence, EOS takes the role of
indicators of success or steps toward success by MNA in remediation of contaminated sites.
With the same rationale, EOS can be used in impact mitigation and management pro-
grams. Figure 10.18 takes the MNA protocol shown in Figure 10.13 as the basis for deter-
mination whether NA can be successfully used as an impact mitigation and management
tool. The irst two levels of protocol are similar to the MNA steps. At the third step or level,
a clear knowledge of the kinds of impact, and mitigation and management requirements
needs to be articulated. These are combined with information from laboratory tests that
are designed to provide the kinds of information necessary to determine material param-
eters and interaction processes. Supporting predictions on fate and transport are neces-
sary pieces of information. All of these combine to provide one with the tools to determine
whether NA can be successfully used to meet the requirements for impact mitigation and
management. Negative responses will require that NA be rejected as a tool or used in
conjunction with other technological tools to provide the necessary impact mitigation and
management solution.

Determine if
all necessary parameters
are present

Site
conditions

No

Determine type of
mitigation and
management
procedures required—
consistent with
geoenvironment
sustainability
requirements and
economic feasibility

Patterns of
natural
attenuation

Yes

Determine
if patterns of natural
attenuation are sucient
evidence

No

Impacts to be
mitigated and
managed

Yes

Required
laboratory
tests

Determine if NA can be
used in support of
other technological
impact and
management schemes

Determine if NA can
mitigate and manage
impacts

No

Predictions
from transport
and fate models

Yes

Structure
NA implementation to satisfy
sustainability and regulatory
requirements

Prescribe
intermediate stage
and success
indicators

Develop
required
monitoring
scheme

FIGURE 10.18
General protocol to determine feasibility and application of NA as a tool for impact mitigation and management.