In-Situ & Ex-Situ Remediation
CORE Environmental Consultants delivers full-service support for the design, implementation, and oversight of both in-situ & ex-situ remediation strategies. Working within the framework of DER-10, NYSDEC-approved RAWPs, and site-specific cleanup objectives, we help our clients mitigate risks and achieve regulatory closure through proven, cost-effective technologies.
Our team evaluates contaminant behavior, site constraints, and redevelopment goals to recommend the most effective approach—whether contaminants are treated in place or excavated and managed offsite.
What’s the Difference?
- In-Situ Remediation: Contaminants are treated directly in the subsurface without excavation (e.g., injection, oxidation, bioremediation)
- Ex-Situ Remediation: Contaminated materials are excavated or removed and treated above ground or offsite (e.g., soil excavation, pump-and-treat, offsite disposal)
Many sites benefit from a hybrid approach, especially when dealing with multiple contaminants or complex geologic conditions.
CORE’s Remediation Capabilities
Our field and engineering teams design and manage:
In-Situ Technologies
- In-situ chemical oxidation (ISCO)
- In-situ chemical reduction (ISCR)
- Enhanced in-situ bioremediation (EISB)
- Soil vapor extraction (SVE)
- Air sparging
- Permeable reactive barriers (PRBs)
- Injection well and direct-push delivery systems
Ex-Situ Technologies
- Soil excavation and offsite disposal
- Onsite stockpiling, stabilization, or segregation
- Groundwater extraction and treatment (pump and treat)
- Soil washing or thermal desorption (as required)
- Water treatment system design and O&M
Our Process
- Remedy Selection & Alternatives Analysis
CORE evaluates contaminant type, source area, hydrogeology, and cost-benefit considerations to select appropriate remedial technologies, documented in a DER-10-compliant RAWP. - Remedial Design & Permitting
We design treatment systems, injection layouts, excavation plans, and O&M procedures. We assist with local permitting, waste profiling, and contractor bidding. - Field Implementation & Oversight
Our field teams provide daily oversight during remedy construction and implementation—ensuring adherence to specifications, health & safety, and data collection protocols. - Performance Monitoring & Optimization
We track remedial progress using confirmation sampling, field screening, and performance metrics—adjusting strategies where needed to meet RAOs. - Documentation & Closure
CORE prepares all post-remediation documentation, including closure reports, Final Engineering Reports (FERs), and Site Management Plans (SMPs).
✅ Why CORE?
✔ Technology-Neutral Planning
We recommend the right tool for the job—balancing cost, efficacy, access, and long-term outcomes.
✔ Remedial Contractor Management
CORE acts as your technical lead during implementation, coordinating contractors and ensuring remedy performance.
✔ Strong Regulatory Alignment
We structure all work in compliance with NYSDEC DER-10 and align with site-specific cleanup criteria.
✔ Redevelopment Support
Our strategies are built with future site use in mind—minimizing disruption and integrating with construction plans.
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.
Plan Your Remediation with CORE
Let us help you evaluate, design, and implement an in-situ, ex-situ, or hybrid remedy that delivers results—and satisfies regulators.
