Vapor Intrusion Assessment Services

Indoor air quality issues may arise when vapors containing volatile organic compounds (VOCs) migrate into buildings from nearby areas containing contaminated soils and groundwater. This phenomenon, commonly referred to as "Vapor Intrusion" (VI), has become a significant issue for the assessment/closure of contaminated sites and a potential liability to property owners.

If potential VI issues are identified during the assessment process, Skelly and Loy can provide turnkey services for evaluating the environmental conditions at the site. We have successfully performed VI assessments involving the following services.

  • Development of VI Assessment Models - To address potential VI conditions, models are used to estimate indoor air concentrations in existing and planned buildings at a site
  • Soil Gas Surveys - Soil gas samples provide site-specific data regarding the concentrations of VOCs within the soils at a site
  • Sub-Slab Sampling - To assess the concentrations of VOCs in the subsurface, soil gas samples can be collected directly beneath the floor of a building
  • Indoor Air Sampling - Skelly and Loy's industrial hygiene professionals routinely assess indoor air quality conditions in buildings using the most up-to-date testing and analytical methods
  • Indoor Air Quality Assessments - Skelly and Loy's industrial hygiene professionals provide residential and industrial assessments of indoor air quality
  • VI Mitigation Experience - Skelly and Loy has performed numerous feasibility studies for designing vapor barriers and small- and large-scale sub-slab depressurization systems


Allow our trained and experienced Environmental Professionals to assist you with your VI issues.


Brownfields Remediation
Clean Fill Determinations
Environmental Compliance Audits
Environmental Equipment Rentals
Facility Decontamination And Decommissioning
Fate And Transport Analyses
Groundwater Investigation And Characterization
Human And Ecological Risk Assessments
Karst Geology Assessments
Landfill Support Services
Pennsylvania Act 2
Phase I and II Environmental Site Assessments
Rapid Response Oversight Services
Remediation Services
Site Investigation/Act 2 Closure
Solid Waste Management Services
Vapor Intrusion Assessment Services
Waste Minimization Planning


    Tel: 717.232.0593
    Address: 449 Eisenhower Boulevard, Suite 300
    Harrisburg, PA 17111


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