VOC / Indoor Air Quality / Forensic Engineering Resources

Philadelphia Region

The Vertex Companies ⭐⭐⭐⭐⭐

Website: https://www.vertexeng.com Phone: +1 (610) 558-8902

Office: 2501 Seaport Dr., Suite BH110 Chester, PA 19013

Best for:

• VOC investigations
• Building failures
• HVAC forensic engineering
• Indoor air quality
• Construction defects
• Expert witness testimony
• Litigation support

One of the strongest forensic engineering firms for complex building investigations.

ECS Mid-Atlantic (ECS Limited)

Website: https://www.ecslimited.com Phone: +1 (609) 832-3910

Office: 2 Executive Dr. Suite 11 Moorestown, NJ 08057

Best for:

• Industrial hygiene
• VOC sampling
• Indoor air quality
• Environmental engineering
• Building science
• Vapor intrusion
• Geotechnical investigations

Large national engineering firm with extensive environmental capabilities.

TRC Companies

Website: https://www.trccompanies.com Phone: +1 (856) 273-1224

Office: 16000 Commerce Parkway, Suite B Mount Laurel, NJ 08054

Best for:

• Chemical exposure investigations
• Indoor air quality
• Industrial hygiene
• Vapor intrusion
• Environmental remediation
• Building environmental assessments

Very experienced with environmental contamination and exposure investigations.

Hillmann Consulting

Website: https://www.hillmannconsulting.com Phone: +1 (856) 581-9055

Office: 304 Harper Drive, Suite 207 Moorestown, NJ 08057

Best for:

• Indoor Air Quality (IAQ)
• Industrial hygiene
• HVAC assessments
• Mold
• Moisture intrusion
• Water damage
• Building science
• Property condition assessments

Strong choice when investigating whether a building environment is unhealthy.

Robson Forensic

Website: https://www.robsonforensic.com Phone: +1 (800) 813-6736

Office: Cira Centre 2929 Arch Street, Suite 1700 Philadelphia, PA 19104

Best for:

• HVAC forensic engineering
• Mechanical engineering
• Indoor environmental quality
• Building systems
• Failure analysis
• Expert witness testimony

Often retained for litigation involving complex engineering questions.

Envista Forensics

Website: https://www.envistaforensics.com Phone: +1 (888) 782-3473

Office: 300 Turner Industrial Way, Suite 368 Aston, PA 19014

Best for:

• Industrial hygiene
• Occupational exposure
• HVAC systems
• Chemical exposure
• Building failures
• Forensic engineering
• Litigation support

National forensic consulting firm with extensive expert witness experience.

Why these six?

Together they cover nearly every discipline involved in investigating VOC exposure:

✓ VOC air sampling

✓ Formaldehyde testing

✓ Industrial hygiene

✓ HVAC investigations

✓ Building pressure relationships

✓ Stack effect analysis

✓ Source identification

✓ Ventilation (ASHRAE)

✓ Indoor Air Quality (IAQ)

✓ Health-based exposure interpretation

✓ Building science

✓ Forensic engineering

✓ Expert witness testimony

These are among the strongest firms in the Philadelphia region for investigating whether a building’s HVAC system, materials, ventilation, or environmental conditions contributed to occupant VOC exposure.