Industrial Hygiene

Vapor intrusion (VI) occurs when chemicals from contaminated soil or groundwater migrate into the indoor air of buildings above a polluted site. Common sources of contamination include dry cleaners, gas stations, automotive repair shops, and various manufacturing or industrial facilities. Mid-Atlantic has been a leader in this field, collaborating regularly with regulators and industry experts to stay ahead of the latest developments in VI assessment and mitigation.

Mid-Atlantic’s vapor intrusion experience includes:

• Field screening assessments and surveys
• Soil gas, sub-slab, crawlspace and indoor air sampling
• Calculation of slab attenuation factors
• Risk assessment and modeling
• Sub-slab spray applications and floor coatings

Design, installation, and operation of active and passive sub-slab venting systems.

We conduct pre- and post-occupancy environmental assessments to verify that indoor spaces meet health and safety expectations before occupancy and following construction or remediation. Services include indoor air quality testing, ventilation evaluations, VOC monitoring, mold assessments, and other industrial hygiene investigations.

• Direct measurement of carbon dioxide (CO2), carbon monoxide (CO), temperature, and relative humidity
• Inspection of the heating, ventilation, and air conditioning (HVAC) systems and operational procedures
• Collection of wipe samples and indoor/outdoor mold spore air samples
• Interviews and questionnaires with employees

• Asbestos inspections
• Asbestos Operations and Maintenance (O&M) plans
• Asbestos Management Plans
• Abatement oversight and monitoring

• Lead-based paint surveys
• Lead-based paint abatement oversight and monitoring

• Certified radon measurements
• Radon mitigation system designs
• Radon testing

Mid-Atlantic Associates provides drinking water testing to evaluate water quality and identify regulated and emerging contaminants, including PFAS, while helping clients meet evolving regulatory requirements. Our team supports municipalities, industries, developers, and property owners through reliable sampling, laboratory coordination, data interpretation, and clear reporting to inform regulatory compliance, environmental due diligence, risk assessment, and public health decision-making.

Mid-Atlantic Associates provides hazardous materials surveys and mitigation support to identify and manage environmental hazards prior to renovation, demolition, property transactions, or redevelopment. Our team conducts inspections for asbestos, lead-based paint, mold, PCBs, and other regulated materials, delivering clear recommendations and oversight to support regulatory compliance, protect worker and occupant health, and facilitate safe project execution.