Environmental Engineering Reference
In-Depth Information
impact. The process thus does not prohibit the proposed action from causing any harm to
the environment; it merely requires disclosure and understanding of the potential impacts
prior to taking any action (Glasson et al. 2005).
4.2.10 Remedial Action Plan
A RAP describes the actions implemented to lower the risk posed by the presence of
contamination at a specific site to an acceptable level. RAPs include (USEPA 1988; New
Hampshire Department of Environmental Services 2008)
• A summary of each investigation completed
• A list of the contaminants of concern (COC)
• Cleanup objectives and goals for each COC
• The technology selected to reduce concentrations of each COC
• Methodology and justification for technology selection
• A time frame to complete each activity
• A plan outlining methods to confirm the remedial action has achieved the desired
result and has met the cleanup standard
• Contingency plan in case the selected remedial action or actions do not achieve
the desired result
A RAP includes detailed engineering and planning drawings to precisely depict the meth-
ods and systems proposed for lowering the contaminant concentrations at a particular site
to an acceptable level.
4.2.11 Completion Evaluation Study
A Completion Evaluation Study is conducted after the site is remediated. The purpose
of the Completion Evaluation Study is to evaluate the effectiveness of the remediation
and to confirm the desired result of permanently reducing contaminant concentrations to
acceptable levels has been achieved. Samples of previously affected media, including soil,
groundwater, sediment, surface water, and air are collected to help confirm the remedia-
tion was successful. To avoid bias, requirements for the Completion Evaluation Study are
usually outlined in the RAP. In addition, many individual states have general guidelines
for determining when remediation has been completed. A Completion Evaluation Study
may require several years to finish, especially if groundwater is a media of concern and
has undergone an active remedial action. The requirements for a Completion Evaluation
Study include
• Confirmatory sample locations
• Number of samples
• Media to be sampled
• Frequency of sampling
• Quality control and quality assurance requirements
• Analysis and analytical procedures
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