Which standard relates to ozone levels in ambient air for indoor air quality assessment?

The standard that relates to ozone levels in ambient air for indoor air quality assessment is the EPA Compendium of Air Pollutants. This standard provides guidelines concerning various air pollutants, including ozone, and is critical for ensuring that indoor air quality is monitored and maintained to protect occupant health.

While ISO 13964 pertains to the determination of air quality in general and may offer useful methodologies for assessing airborne contaminants, it does not specifically target ozone levels in the context of indoor air quality.

The California Department of Public Health Standards focuses on specific guidelines and methodologies pertinent to public health in California, including some aspects of indoor air quality but doesn't specifically address ozone as the primary focus.

ISO 7730, on the other hand, deals mostly with thermal comfort criteria in indoor environments, not specifically air quality assessments involving ozone levels.

Therefore, the Environmental Protection Agency's guidelines are key for understanding the implications of ozone in indoor environments, validating the integrity of the answer concerning ozone levels in ambient air for indoor air quality assessment.