Remedial Investigations & Feasibility Studies (DER-10)
CORE Environmental Consultants provides comprehensive site investigation and remediation consulting services for contaminated properties across New York City and Western New York. From due diligence through cleanup, we support developers, municipalities, and property owners in managing environmental liabilities and achieving regulatory closure.
Whether your site involves petroleum impacts, chlorinated solvents, heavy metals, or unknown fill, our team delivers defensible strategies tailored to your project’s goals and constraints.
When Is Site Investigation and Remediation Required?
A Remedial Investigation and Feasibility Study is typically required when:
- A site has confirmed or suspected releases of hazardous substances or petroleum
- The site is being addressed under the BCP, Superfund, or VCP programs
- The nature and extent of contamination is not yet fully understood
- Multiple cleanup alternatives must be evaluated
- NYSDEC requires a DER-10-compliant remedy selection
Failure to perform an adequate RI/FS may delay remedial approval and regulatory closure, increase long-term liability, or hinder site reuse and redevelopment.
Our Site Investigation and Remediation Consulting Services
CORE offers full lifecycle RI/FS support:
- Work Plan development and agency coordination
- Subsurface investigations: soil borings, monitoring wells, soil vapor points
- Groundwater sampling (low-flow, purge, and grab methods)
- Soil vapor intrusion evaluations (sub-slab and indoor air)
- Data evaluation and fate/transport modeling
- Risk assessments (qualitative and quantitative exposure analysis)
- Remedial action objective (RAO) development
- Alternatives analysis and feasibility ranking
- DER-10 documentation including RI Reports, FS Reports, and remedy selection memos
Our Process
- Remedial Investigation Work Plan (RIWP)
CORE develops an NYSDEC-compliant RIWP outlining objectives, sampling locations, QA/QC protocols, and health & safety procedures. - Field Data Collection
Our team mobilizes for subsurface borings, groundwater and vapor sampling, geologic logging, and collection of site-wide contaminant data. - Data Interpretation & Risk Evaluation
We evaluate vertical and horizontal contaminant distribution, migration potential, and exposure pathways, followed by a risk-based assessment. - Remedial Alternatives Analysis
Using DER-10 criteria, CORE develops and screens multiple cleanup strategies based on effectiveness, implementability, and cost. - Final Reporting & Remedy Selection
We prepare the complete RI and FS reports with graphics, figures, data tables, and a recommended remedial approach for agency review.
✅ Why CORE?
✔ NYSDEC DER-10 Experts
We understand the regulatory expectations and technical depth needed to move projects toward remedy selection and closure.
✔ Field-to-Report Integration
Our in-house team performs the investigation and develops the report—ensuring continuity, data integrity, and regulatory defensibility.
✔ Cost-Effective & Scalable Solutions
We tailor investigations and cleanup planning to the project scale, budget, and redevelopment goals.
✔ Strong Agency Relationships
CORE works directly with NYSDEC project managers, legal counsel, and municipal stakeholders to ensure alignment and momentum.
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.
Start Your RI/FS with CORE
From initial scoping to remedy selection, CORE delivers RI/FS packages that satisfy regulators and set your project on a path to closure.
