A5.504.2.1 IAQ Testing
Allowable levels of contaminant concentrations measured by testing shall not exceed the following:
- Carbon Monoxide (CO): 9 parts per million, not to exceed outdoor levels by 2 parts per million;
- Formaldehyde: 27 parts per billion;
- Particulates (PM10): 50 micrograms per cubic meter;
- 4-Phenylcyclohexene (4-PCH), if fabrics and carpets with styrene butadiene rubber (SBR) latex backing, are installed: 6.5 micrograms per cubic meter; and
- Total Volatile Organic Compounds (TVOC): 300 micrograms per cubic meter.
Testing of indoor air quality should include the following elements:
- The contaminant sampling and averaging times and the measurement methods should be sufficient to achieve a Limit of Detection that is below the maximum allowable concentrations.
- Testing should be conducted with the HVAC system operated at the minimum design outdoor air ventilation rate.
- Air samplers and monitors should be located near likely sources of formaldehyde and other volatile organic compounds, at a height of 3 to 6 feet from the floor and well away from walls and air diffusers.
- The test protocols should be justified with documentation to show that appropriate sampling methods and times were used.
For each sampling area of the building exceeding the maximum concentrations specified in Section A5.504.2.1.1, flush out with outside air and retest samples taken from the same area. Repeat the procedures until testing demonstrates compliance.
Note: U.S. EPA-recognized testing protocols may be found on the Air Resources Board web site.
- See Title 17, Section 93120.3(c) and (d), respectively.
- Documentation must be provided verifying that materials are certified to meet the pollutant emission limits. A list of manufacturers and their NAF and ULEF certified materials is provided at: http://www.arb.ca.gov/toxics/compwood/naf_ulef/listofnaf_ulef.htm.