Papers by Javier Maldonado Santillan
Remediation Journal, 2009
Integrating worker and climate risks into remediation efforts may confer significant benefits, bu... more Integrating worker and climate risks into remediation efforts may confer significant benefits, but challenges exist to identifying, assessing, and accounting for them in the remedial process. For sites where future risk posed by contamination far exceeds the risk posed to workers who may be exposed to the contaminants during the remedial process, limiting the range of decision inputs to those presented by the site conditions made sense and provided a net benefit to human health and the environment. There are other sites, however, where future risk posed by the in situ contamination are at levels comparable to the real risks posed to workers, ecology, and even emerging concerns about climate change. For these sites, a net risk reduction cannot be assumed to be a result of remedial action, challenging the remedial community to develop new approaches to ensure positive results. O
Performing contaminant mass balances for remedy assessments
Remediation Journal, 2009
ABSTRACT Contaminant mass-balance assessments are useful tools to help quantify various mass tran... more ABSTRACT Contaminant mass-balance assessments are useful tools to help quantify various mass transport and removal mechanisms that may be active in a remedial system setting. This article presents the basics of performing a mass balance and illustrates the utility of using the information derived to support project management decisions. It is important to understand the partitioning of contaminant mass into various environmental media and physical forms, as well as the relationships among the partitions. Contaminant partitioning tends toward an equilibrium state, so natural or engineered mass transfer into or out of one partition will affect the others. Mass balances are exercises that quantify, to the extent possible, the contaminant mass in the various environmental partitions and the transfer and transformation processes that affect contaminant distribution. Understanding mass partitioning and transfer mechanisms helps remediation practitioners to engineer and optimize those mechanisms that contribute to risk reduction at a contaminated site. Such knowledge can inform risk managers when natural mechanisms may dominate engineered approaches and help identify uncertainties in contaminant fate and transport. © 2009 Wiley Periodicals, Inc.
Best management practices for environmental restoration programs
Remediation Journal, 2010
... of soil and groundwater was driven primarily by the Resource Conservation and Recovery Act (R... more ... of soil and groundwater was driven primarily by the Resource Conservation and Recovery Act (RCRA) and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA, or Superfund) and the Superfund Amendments and Reauthorization Act (SARA ...
The critical importance of using current conceptual site models in environmental restoration decision making: a discussion and case study
Land Contamination & Reclamation, 2010
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Papers by Javier Maldonado Santillan