3 Tips on How to Simplify VOC Monitoring and Set Up a Successful Network.
What will you learn from the Webinar?
1. Mistakes when setting up a calibration system.
2. Using communications with the GC monitors.
3. GC pre-concentrator management maintenance and functions.
Whether your monitoring requirements to meet VOC emissions standards from the EPA are simply for BTEX, a C6 - C12 range, or even a full range, discover how American Ecotech can provide a complete solution that will give you consistent, precise, and reliable results to meet any specific VOC requirements.
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American Ecotech VOC PAMS Webinar
1. Tips on How to Simplify VOC
Monitoring and Set Up a
Successful Network
2. Since 2002 American Ecotech has been serving industrial and
government customers throughout the USA
• Systems integration & deployment
• Onsite operational training
• Remote maintenance support
Specializing in :
Rack-mountable VOC analyzers designed for PAMS Fenceline monitoring systems
All other types of ambient air monitoring instruments Shelters, trailers, and all
support infrastructure associated with ambient air monitoring turn-key systems
4. What will you learn from this Webinar
1. What is PAMS?
2. GC pre-concentrator management, maintenance and
functions
3. Common mistakes when setting up a calibration
system
4. Getting Data from the GC Monitors
5. Polling Question
What application of VOC monitoring do you most have a need for ?
BTEX
PAMS
C6 – C12
Methane Non-Methane
Total VOC’s
Other
6. An Overview and Brief History
of PAMS
Photochemical Assessment
Monitoring Stations
7. VOC Measurement Technologies
Canisters vs Auto-GCs
• Data averaged over sampling period
• Low Capital Cost
• Reoccuring lab costs
• Need for manual labor
• Hourly data
• Higher Capital costs
• Higher skill level required to run the system
8. About PAMS
new auto-GCs have been developed that
provide near real-time data, designed for
use in ambient air monitoring stations
9. About PAMS
Photochemical Assessment Monitoring Stations
US Environmental Protection Agency (EPA)
• Revised Ambient AQ Surveillance Regulations
• Effective February 12, 1993
In 1998 the EPA commissioned a study using PAMS to determined if there was a change in
ambient VOCs as a result of the introduction of Reformulated Gas in 1995. The result were
positive showing a reduction in Benzene related the reduction in the fuel.
The revisions required states and local monitoring agencies to establish Photochemical
Assessment Monitoring Stations (PAMS) in ozone nonattainment areas classified as
serious, severe, or extreme
Monitoring agencies are given options to measure VOCs using either an automated Gas
Chromatograph (auto-GC) or collect samples in the field and analyze them in a laboratory.
When the PAMS program was originally implemented, field rugged auto-GCs were not
available, so many monitoring agencies had to rely upon canister sampling and/or very
complex laboratory GCs equipped with automatic samplers.
10. • April 1998 - EPA's Office of Mobile Sources commissioned a contractor to look at
PAMS data to investigate if changes in ambient VOC levels were related to the
introduction of reformulated gas in 1995.
• The report concluded that there is a strong case that a reduction in ambient
benzene was related to the reduction of benzene in fuel and that other species,
such as aromatics, may also have been significantly reduced.
• These findings are consistent with observations in EPA's "National Air Quality and
Emissions Trends Reports" for both 1995 and 1996.
Current design calls for up to 5 sites in
each PAMS area
Type 1 Upwind
Type 2 Max emissions
Type 3 Max ozone
Type 4 Extreme Downwind
•PAMS Season June-August
11. SIP Control Strategy Evaluation: Evaluation of the effectiveness of State
implemented plans control strategies.
Emissions Tracking:
• Corroboration of NOx and VOC inventories Trends of VOC species source profiles
• Analysis of air toxics.
Ambient Trend Appraisals:
• O3
• NOx
• Total and speculated VOC
• Adjustments in meteorological conditions.
Exposure Assessment: Estimation of risk levels and the size of effected populations.
The principal objectives of the PAMS program can be summarized as follows:
NAAQS Attainment and Control Strategy Development:
• Attainment / Nonattainment determinations
• Assessment of the relative contributions of local and upwind sources
• boundary conditions for photochemical modeling
20. The purpose of the pre concentrator is to sample the ambient and get the most even
and consistent sample. It helps to evens out the air when spikes or other air related
event might arise. An example is that there is a spike of Methane when the more
consistent air is mixing with it and averaging the air for that hour.
The Pre Concentrator works on a three hour sampling cycle
The main purpose of the Pre Concentrator is to:
• Heat the air
• Creating a sample that is an average of the hour of sampling
21. At the end of hour 1 of sampling tube #1 opens and releases the cumulative sample
To the GC
The ambient air collected in hour 2 begins to flow into tube #2 for heating
22. Pre Concentrator Operation and Maintenance
The same process that took place in tube#1 in Hour 2 happens in Tube #2
29. Calibration
Take the time warm up the system ( 30 mins / 1 hour )
Match up the proper gases
Most calibrations can be done with a single point
Pay attention to Column efficiency
