CORE Environmental Consultants provides full-service support to guide sites through the final stages of environmental remediation—ensuring that all regulatory requirements are satisfied, documentation is complete, and official closure is achieved. Our Regulatory Closure & Coordination services span communication with NYSDEC and other agencies, preparation of closure documents, and coordination of long-term compliance obligations like Environmental Easements and Institutional Controls.

From Brownfield Cleanup Program (BCP) projects to State Superfund and voluntary cleanups, CORE ensures your site exits remediation with confidence and in full compliance.


What Is Regulatory Closure?

Regulatory closure refers to the formal conclusion of environmental remediation at a site, typically involving:

  • Submission of a Final Engineering Report (FER)
  • Verification of all remedial work completion
  • Documentation of engineering/institutional controls
  • Coordination of long-term stewardship plans
  • Issuance of a regulatory milestone, such as:
    • Certificate of Completion (COC) under the BCP
    • No Further Action (NFA) letter from NYSDEC
    • Release from liability or site delisting
    • Notice of Site Reclassification (Superfund)

CORE manages every step of this process—minimizing risk and expediting approvals.


 CORE’s Regulatory Closure Services

We help clients achieve closure by:

  • Preparing and submitting Final Engineering Reports (FERs)
  • Verifying remedy completion and collecting final site data
  • Mapping and documenting engineering and institutional controls
  • Coordinating with NYSDEC project managers and legal teams
  • Developing or updating Site Management Plans (SMPs)
  • Facilitating Environmental Easement filing and execution
  • Responding to agency comments and revising submittals
  • Supporting community notification or public outreach, when required

Our Process

  1. Remedial Completion Verification
    CORE coordinates with site contractors to verify that all remediation actions—including soil excavation, treatment, system shutdown, and restoration—have been performed per the approved Remedial Action Work Plan (RAWP) or equivalent.
  2. Documentation and Reporting
    We prepare and certify the Final Engineering Report (FER), confirming remedy implementation, contaminant removal or containment, and ongoing control measures. Site plans, photos, manifests, and as-built drawings are included.
  3. Agency Coordination
    CORE works directly with NYSDEC case managers, BCP contacts, and legal counsel to address regulatory feedback, coordinate timing, and ensure all closure prerequisites (e.g., institutional control recording) are satisfied.
  4. Issuance of Closure Milestones
    Once approved, we support the issuance of:
  5. Certificate of Completion (COC)
  6. Environmental Easement recording and tracking
  7. NFA letters or reclassification notices
  8. Long-term compliance planning
  9. Post-Closure Compliance Support
    CORE can remain engaged post-closure to manage required monitoring, inspections, or Periodic Review Reports (PRRs) through the Site Management Plan.

✅ Why CORE?

✔ Proven Track Record
We’ve closed dozens of BCP, Superfund, and voluntary cleanup sites across New York State, working closely with NYSDEC and OER.

✔ FERs That Withstand Review
Our engineering documentation is thorough, well-organized, and backed by field data—ensuring smooth reviews and minimal resubmittals.

✔ Start-to-Finish Support
From final remediation verification through certificate issuance, CORE stays hands-on throughout the entire closure process.

✔ Alignment with Redevelopment Goals
We ensure closure doesn’t just check regulatory boxes—but clears the path for safe occupancy, financing, and reuse.

Our Environmental Remediation Consulting Services

Remedial Investigations & Feasibility Studies (DER-10)

CORE conducts Remedial Investigations (RIs) and Feasibility Studies (FSs) in accordance with NYSDEC DER-10 to characterize contamination and evaluate cleanup alternatives. Our services include sampling plans, conceptual site models, risk assessments, and cost-benefit analyses to support the selection of effective, regulatory-approved remedial strategies.

Brownfield Cleanup Program (BCP) Support

CORE offers comprehensive support for Brownfield Cleanup Program (BCP) sites, guiding property owners and developers through investigation, remedial action planning, community outreach, and documentation. We coordinate closely with NYSDEC to secure Certificates of Completion (COCs), tax credit eligibility, and regulatory closure for redevelopment projects on environmentally impacted land.

In-Situ & Ex-Situ Remediation

CORE designs and implements both in-situ and ex-situ remediation technologies to treat contaminated soil, groundwater, and vapor at active and legacy sites. Our capabilities include excavation, chemical oxidation, bioremediation, soil vapor extraction (SVE), and stabilization techniques, selected based on cost, site access, contaminant type, and regulatory targets.

Vapor Intrusion Mitigation Systems

CORE designs vapor intrusion mitigation systems that protect indoor air quality in buildings located above contaminated subsurface environments. Our services include sub-slab depressurization system (SSDS) design, passive venting, vapor barriers, and post-installation verification sampling, all compliant with NYSDOH and NYSDEC guidance.

Groundwater Monitoring & Reporting

CORE conducts routine and long-term groundwater monitoring programs to track contaminant migration, demonstrate remedy effectiveness, and support regulatory closure. We install and sample monitoring wells, analyze results against groundwater standards, and prepare detailed reports for submission under DER-10, BCP, and Superfund oversight.

Site Management Plans (SMPs) & Periodic Review Reports (PRRs)

CORE prepares and maintains Site Management Plans (SMPs) and Periodic Review Reports (PRRs) to ensure the long-term protectiveness of institutional and engineering controls. Our reports include inspection protocols, maintenance records, and regulatory certifications that align with NYSDEC DER-10 and site-specific environmental easements.

Regulatory Closure & Coordination

CORE manages the regulatory closure process by compiling investigation and remediation data, preparing closure reports, and coordinating with NYSDEC, NYC OER, and other agencies. Our goal is to achieve No Further Action (NFA) determinations or Certificates of Completion (COCs), ensuring sites are compliant, documented, and redevelopment-ready.

Ready to Close Your Remediation Site?

Let CORE handle the coordination, documentation, and communication necessary to secure formal closure and regulatory approval.

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