Long-Term Building Air Measurements
for Volatile Organic Compounds (VOCs)
including Aldehydes
at a
California Department of Health Services
This study was conducted by the California Department
of Health Services (CDHS) Indoor Air Quality Section beginning in 2003 and
ending in June 2004. Its goal was to
expand scientific investigation data of office buildings constructed with
“low-emitting” interior finishing materials that were tested by their
manufacturers prior to their selection and installation to meet certain
chemical emission criteria. In addition,
the temporal changes of target chemicals were studied to determine the effect
of building materials, office furniture, occupant activities, and
cleaning/maintenance products on indoor air quality.
This study (Volume 1) and accompanying data (Volume
2) outline the role of indoor air quality and its relationship to the
sustainable construction practices implemented at the five-building Capitol
Area East End Complex (CAEEC). The final
report was issued
Download: Executive
Summary (HTML)
Volume 1 of
the report (PDF)
Volume 2
(study dataset) (PDF)
1.
The volatile organic compound concentration targets
established for this project were not exceeded in the majority of the
locations. However, acetaldehyde and formaldehyde targets were exceeded in
numerous locations of more than one building.
2.
Concentrations of chemicals measured at the
newly-constructed CAEEC were compared to those reported in the USEPA’s Building Assessment Survey and Evaluation (BASE)
study in which older office buildings were monitored. The concentrations of common chemicals to
both studies were comparable and only the concentrations of a few chemicals at
the CAEEC were higher than those reported in the BASE study.
3.
Very few
chemicals could be traced to a unique source.
Only one building-related compound (caprolactam)
and one occupant-related compound [(decamethylcyclopentasiloxane,
(d-5)] studied were clearly identifiable from unique sources. In the case of caprolactam,
there was a clear decrease over time in its emissions and in the case of d-5, there was a clearly identifiable increase over time in
its emissions. Emission factors of some
of the other target chemicals fluctuated throughout the study.
1.
Local emission factors of some of the target chemicals
during the post-occupancy period were fairly uniform within each building, whereas,
others differed substantially from building median values.
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