Vapor Intrusion Assessment
Protect Indoor Air Quality.
Comprehensive vapor intrusion screening, sub-slab sampling, and mitigation design to protect building occupants and satisfy regulatory requirements in New York and New Jersey.
How an assessment runs
Four tracked stages from authorization to a lender-ready report.
- 01
Scope & kickoff
Same-business-day scope, fee range and delivery date.
Request a scope - 02
Findings & report
ASTM-conformant deliverable your lender and counsel can rely on.
Read the FAQs - 03
Common next step
The work most clients authorize once this closes out.
Asbestos & Lead Survey - 04
Start the engagement
Send the site details — we scope it and price it.
Start the engagement
Why Vapor Intrusion Matters
Health Risk
Volatile organic compounds (VOCs) migrating from contaminated soil or groundwater into buildings pose serious health risks including cancer. NJDEP and EPA mandate assessment when contamination is nearby.
Transaction Requirements
Lenders and environmental attorneys increasingly require vapor intrusion assessments as part of Phase II ESAs. Missing this step can delay closings or create post-transaction liability.
Regulatory Compliance
NJDEP Vapor Intrusion Guidance (2021) and NYC OER requirements mandate assessment and mitigation for properties near contaminated sites. Non-compliance can result in enforcement actions.
Vapor Intrusion Services
From initial screening through full mitigation system design, one team, one project manager, complete regulatory compliance.
Vapor Intrusion Screening
Property buyers and lenders who need a quick risk assessment before committing to full investigation during real estate transactions.
Initial vapor encroachment screening per ASTM E2600 to determine if a vapor intrusion pathway exists. Includes review of historical records, groundwater data, and subsurface conditions to assess risk before committing to full investigation.
What's Included
- ASTM E2600 vapor encroachment screening
- Historical land use & regulatory database review
- Groundwater & soil contamination pathway analysis
- Risk determination report with recommendations
- Vapor intrusion likelihood ranking (Tier 1)
- Go/no-go recommendation for sub-slab sampling
Sub-Slab & Indoor Air Sampling
Properties with known or suspected subsurface contamination where volatile organic compounds may be migrating into occupied buildings.
Full vapor intrusion investigation including sub-slab soil vapor probes, indoor/outdoor ambient air sampling, and laboratory analysis for VOCs, TCE, PCE, and other target compounds. Results compared against NJDEP Vapor Intrusion Screening Levels (VISLs) and EPA guidelines.
What's Included
- Sub-slab vapor probe installation (3–6 points typical)
- Indoor & outdoor ambient air sampling
- TO-15 laboratory analysis for VOCs
- Comparison to NJDEP VISLs & EPA screening levels
- Vapor intrusion investigation report
- Regulatory agency correspondence & filing
Vapor Mitigation System Design
Building owners and developers requiring active vapor mitigation systems to meet regulatory compliance and protect occupant health.
Complete vapor mitigation design including sub-slab depressurization systems (SSDS), vapor barriers, and engineering controls. Includes system design, installation oversight, post-installation verification testing, and long-term monitoring plans required by NJDEP and NYSDEC.
What's Included
- Sub-slab depressurization system (SSDS) design
- Vapor barrier specification & installation oversight
- Engineering control design per NJDEP/NYSDEC standards
- Post-installation verification sampling
- Long-term monitoring plan development
- Operation & maintenance manual
LSRP-Managed Investigations
Every vapor intrusion assessment is overseen by a Licensed Site Remediation Professional (LSRP) and follows NJDEP Vapor Intrusion Technical Guidance. We handle all agency correspondence, sampling protocols, and regulatory filings.
NY/NJ Compliance Permit Matrix
Vapor Intrusion & Indoor Air Reference
Quick-reference guide to vapor intrusion screening levels, sub-slab sampling protocols, and NJDEP/NYSDEC mitigation requirements.
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Transparent pricing for Vapor Intrusion Assessment — get your site-specific estimate
Answer a few questions about your property and get a real price range in under 2 minutes. No sales call required.
- Site-specific range
- Under 2 minutes
- No obligation
- Emailed to you
Preliminary estimate only. Not an engineering quote.
Service inquiry form
Request a Free Project Consultation
Tell us about your property and we'll respond with a tailored scope and pricing within 2 business hours.
Vapor Intrusion Assessment Questions
Get answers to common questions about our vapor intrusion assessment services, turnaround times, and deliverables.
Tell us about your site
A licensed engineer will get back to you the same business day.
Related Environmental Assessment Services
Projects rarely need one service in isolation. These are the scopes most often paired with this one.
Asbestos & Lead Paint Survey
Certified pre-demolition and pre-renovation asbestos and lead paint surveys for NYC and NJ properties.
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UST Closure & Tank Removal
Underground storage tank removal, closure-in-place, and post-closure remediation for NYC and NJ.
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PFAS Assessment & Advisory
PFAS due diligence, sampling, and regulatory advisory for NJ and NY properties.
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Groundwater Investigation & Monitoring
Monitoring well installation, aquifer testing, and long-term groundwater sampling programs.
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Ground Penetrating Radar (GPR) Survey
Non-destructive subsurface utility, tank, and structural GPR investigations.
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Phase I Environmental Site Assessment
ASTM E1527-21 Phase I Environmental Site Assessments satisfying All Appropriate Inquiries for NY/NJ property transactions.
Learn moreServices That Work Alongside Vapor Intrusion Assessment
Scopes our clients most often add to keep one schedule, one regulator conversation, and one point of accountability.
Vapor Intrusion Mitigation System Design
Sub-slab depressurization and vapor barrier system design, installation oversight, and post-mitigation verification per NJDEP and NYSDEC vapor intrusion guidance.
Learn more
Site Management Plans
Post-remedy Site Management Plans, engineering and institutional control monitoring, and Periodic Review Reports.
Learn more
NYC E-Designation & OER Program Management
NYC OER E-Designation testing, hazmat, noise, and air quality compliance for development sites.
Learn moreIndustries That Rely on Vapor Intrusion Assessment
See how teams across these sectors integrate vapor intrusion assessment into their projects, with regulator-ready deliverables and predictable timelines.
Developers
We understand your timeline pressures. Get Phase I ESAs that pass lender scrutiny the first time, with 1-week turnaround when you need it.
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Industrial
Whether you're acquiring, developing, or operating industrial facilities, we provide the environmental expertise to protect your investment.
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Pharma/Chemical
From RCRA compliance to legacy contamination, we help pharmaceutical and chemical companies manage environmental risk and regulatory obligations.
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Institutional
Hospitals, universities, and nonprofits face unique environmental challenges. We help you protect your community while managing complex property portfolios.
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Law Firms
We provide environmental law firms with the technical analysis, expert opinions, and litigation support needed to build winning arguments.
Explore industryVapor Intrusion Assessment Across the NY/NJ Metro Area
Licensed teams working locally — pick your market for regional regulators, turnaround times, and recent project work.
