Indoor Air Quality (IAQ) Investigations

People are complaining of headaches, odors, or irritation, and nobody can find a cause. IAQ complaints are frustrating precisely because the answer is usually invisible — and often isn’t what everyone assumes it is.

We investigate methodically: building walkthrough, HVAC evaluation, occupancy and complaint patterns, and targeted sampling for the agents that actually explain the symptoms. The goal is a real root cause, not a report full of numbers that don’t answer the question.

What's included

mold

Mold & moisture

Source identification, sampling, and whether remediation is genuinely warranted.

voc

VOCs & chemical agents

Solvents, cleaning agents, off-gassing, and process contaminant migration.

chemical

CO, CO₂, particulates

The routine measurements that explain most complaints — and rule out the exotic ones.

audit

HVAC & ventilation review

Air exchange, filtration, outdoor air fraction, and pressure relationships.

When you need this

Employees report headaches, irritation, fatigue, or odors
There is visible mold or a history of water intrusion
A building renovation or new furnishings preceded the complaints
Process contaminants may be migrating into office areas
You need an objective third party because the issue has become contentious

Regulatory context: OSHA has no comprehensive IAQ standard, which is precisely why these cases get mishandled. Investigations are evaluated against ASHRAE ventilation standards, ACGIH TLVs, EPA guidance, and recognized IAQ investigation methodology. Where mold is involved, there are no federal exposure limits — interpretation requires professional judgment, not a number.

Why Vantage

IAQ is the easiest area to get wrong, in both directions. Some consultants find nothing because they sampled for the wrong thing. Others find alarming numbers with no context and trigger an expensive remediation that wasn’t needed. A methodical investigation gets you the actual answer — including, sometimes, that the building is fine.

Questions, answered

Often it isn’t. Mold gets blamed for a lot of IAQ complaints that turn out to be ventilation, chemical off-gassing, or CO₂ buildup from inadequate outdoor air. We test for what the symptoms actually point to.

No — there are no federal exposure limits for mold, which is why mold results require careful interpretation rather than a pass/fail number. Anyone who tells you a mold count means you’re out of compliance is overselling.

Then that’s the finding, and it’s a legitimate and useful one. A documented, competent investigation showing the building is within normal parameters has real value — for your employees and if the issue ever becomes a claim.