Most people here seem concerned about vocs. Plastics, carpets, sofas, paints, air fresheners and a ton of other typical household items produce them.

I feel like the author is really jumping the gun here in identifying the source of pollutants by not seeking to consider the fact that new apartments are loaded with freshly off-gassing materials.

The other thing that should have been mentioned is more about their vitals prior to moving in. How confident was she in her baseline because it could be a preexisting condition that became very exacerbated.

Edit: But that said, my opinion of the Irvine company is extremely low. I’d not be the least bit surprised if they willfully cut every corner they could. Either with remediation or materials in the apartment. And pollutants do pool overnight but near freeways they are typically the worst in the dawn hours. There would be less air exchange in the apartment, leading to a buildup from an external or internal source.