Vapor intrusion is one of the most misunderstood exposure pathways in New Jersey environmental work, and it is also one of the fastest to become a compliance issue. Property owners, developers, and facility managers reach Anco Environmental Services when VOC-impacted soil or groundwater sits under an occupied building, or when a redevelopment plan puts new construction over a known release. Our LSRPs and engineers scope, sample, and mitigate the pathway so that buildings stay compliant with current NJDEP guidance and safe for the people inside them.
Why Vapor Intrusion Matters
Volatile organic compounds such as trichloroethylene, perchloroethylene, benzene, and vinyl chloride can migrate from subsurface sources through soil pores and utility penetrations into the indoor air of commercial, industrial, and residential buildings. The pathway is invisible, often odorless at the concentrations of concern, and can persist long after the original release has been addressed in soil or groundwater. For that reason, NJDEP treats vapor intrusion as a distinct investigative track under the Vapor Intrusion Technical Guidance, with its own screening levels, sampling methods, and mitigation expectations.
Our workflow starts with a pathway evaluation that weighs site history, chemistry, and building construction against NJDEP criteria. When sampling is warranted we install sub-slab soil gas ports, collect time-integrated indoor air samples using Summa canisters, and pair the results with outdoor ambient data to isolate the subsurface contribution. Where concentrations exceed screening levels, our engineers design and install a mitigation system that is sized for the building envelope and verified through post-installation sampling.
Clients receive a single, auditable record that moves a site from initial screening to a defensible Response Action Outcome. That includes evaluation plans, lab data, engineering drawings, commissioning reports, and the post-mitigation monitoring program that NJDEP expects after system startup.
- Vapor intrusion receptor evaluations aligned to current NJDEP Technical Guidance
- Sub-slab soil gas surveys, soil gas probes, and indoor air sampling using approved methods
- Corrective-measure engineering, blower sizing, and sealed construction documents
- Active sub-slab depressurization and vapor barrier system installation
- Commissioning, post-mitigation verification, and long-term performance monitoring
If you have a site with known VOC impacts, a pending Phase II finding, or a redevelopment plan that crosses a legacy industrial footprint, our team can walk you through what NJDEP will require and what it will actually cost to close. Call (908) 201-4722 or contact us for a scoped consultation with a licensed LSRP.