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Ambient Monitoring
ERG provides fully turnkey ambient monitoring services from network design
and installation through sample analysis and data management.
Applications
- State/regional/national air-quality monitoring networks
- Hazardous waste site monitoring
- Indoor air quality/workplace monitoring
- Remote sensing
- Mobile source monitoring
- Fence-line monitoring
- Leak detection and repair
Pollutants
- Non-methane organic compounds (NMOC)
- Air toxics (including all 59 compounds on EPA's TO-15A list)
- Speciated hydrocarbons (including all 77 compounds on EPA's SNMOC/PAMS list)
- Dioxins/furans
- Hexavalent chromium and other trace metals
- Reactive compounds, including carbonyls
- Particulate matter, including PM 2.5 and PM 10
Technologies
- VOC samplers (TO-14/15)
- SUMMA®-passivated stainless-steel canisters
- Silco®-treated stainless-steel canisters
- FTIR/UV-DOAS optical spectroscopy
- GMW/GSP-1 Semivolatile organic samplers (TO-13A)
- Hi-Vol particulate samplers
- Portable meteorological stations
Sample Projects
EPA National Air Monitoring Support: ERG is currently
EPA's prime contractor for several national air monitoring programs, including
the Urban Air Toxics Measurement Program (UATMP), the Non-Methane Organic Compound
(NMOC) monitoring program, and the Photochemical Assessment and Monitoring Stations
(PAMS). Under these programs, ERG is responsible for designing and operating
monitoring stations; training; sample collection and analysis; and data management.
Greenhouse Gas Emissions Monitoring: ERG continuously
measured emission rates of greenhouse gases (methane and ammonia) from wastewater
treatment lagoons using open-path FTIR spectroscopy. As part of this study,
audits were performed to determine the accuracy of the FTIR system. The open-path
FTIR system used by ERG was found to be accurate to within 2 percent of actual
lagoon emission rates as determined by tracer release rates.
Air Permitting Support: ERG provided ambient monitoring network support
to a large engineering firm to confirm ISCST3 model predictions of hazardous
waste incinerator emissions exposure. Support provided by ERG included the network
design, siting, sampling plan development, QAPP development, site setup, onsite
training, meteorological monitoring support, operation and sampler maintenance,
and chemical analysis of samples collected from 10 sites during a 1-year period.
Landfill Gas Risk Assessment: ERG performed continuous
monitoring of ambient air around a large municipal landfill to estimate the
human health risks associated
with exposure to ozone, hydrogen sulfide (H2S), and fine particulate matter
(both PM 2.5 and PM 10). ERG installed and operated
monitoring systems at 21 sites around the perimeter of the landfill, and performed
meteorological monitoring.
Indoor Air/Exposure Monitoring: ERG developed a
sampling and analytical method for determining indoor air concentrations
of respirable pharmaceutical compounds. As part of this effort,
ERG developed specialized sampling and analytical procedures. The
accuracy, precision, and detection limits of the procedures were
demonstrated to ensure data quality. Standard operating procedures
were written and are used by the client on an ongoing basis to monitor
worker exposure to airborne materials.
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