
The Environmental Restoration Technical Support Branch, or CZTE, focuses significant technical expertise and resources on complex sites where hydrogeological conditions or recalcitrant and persistent contaminants pose long-term and high-cost remediation challenges.
Remediation strategies, such as risk-based cleanup, long-term monitoring and natural attenuation, have been promoted to reduce Air Force environmental liability at many sites. The branch continues to provide support for innovative remedial actions based on risk management, alternative endpoints and, when appropriate, technical impracticability waivers.
Recently, the branch implemented a Complex Site Initiative, or CSI, to provide in-depth assessment of remediation strategies. A CSI evaluation determines feasibility of reaching remedial objectives based on existing technology and materially advancing toward site completion within 30 years.
Evaluations are tailored to the remedial status of a site and may include: identifying data gaps and needed characterization activities, evaluating success and failure of deployed remedial technologies, evaluating applicability of innovative technologies, and recommending remedial strategies, conceptual remediation designs and performance models.
A CSI evaluation can support contract acquisitions by developing sound technical rationales for performance objectives. Completed as part of Performance-Based Remediation surveillance, a CSI evaluation provides independent validation of a contractor's remedial strategy.