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Mobile Air Testing near
shale gas production

 

There have been various types of air testing done around Marcellus Shale gas production activities and here we take a look at mobile air testing being conducted in Washington County, Pennsylvania.

Testing is done through ambient air sampling as well as direct measurement and characterization of emissions from Marcellus Shale gas well sites, Centralized impoundment dams, Compressor stations, Gas processing facilities and trucking operations.

Some of the pollutants in test results might include Particulate Matter, Ozone, Nitrogen Oxides, Sulfur Dioxide, Carbon Dioxide, Carbon Monoxide, Methane, Large hydrocarbons and Volatile organic compounds.
 

 


Mobile air testing laboratory

Mobile air testing laboratory stopped next to Marcellus shale wells
 
 
Benzene and toluene sensing machine
Equipment on right side of van measures benzene and toluene
 
 
Air quality testing equipment
Monitors, electronics, tubes and wiring on left side of van
 
 
Device used to detect various types of gas
Device used to detect various types of gases
 
 
Monitor showing results of air testing in progress
Monitor showing various computer readouts
 
 

METHODOLOGY

Gas production and processing sites are measured using a suite of high resolution instrumentation in the mobile laboratory truck (1-second sampling). The mobile lab also samples ambient air continuously while driving to establish background concentrations. Emissions specific to a certain site can be characterized by fenceline sampling, or using tracer methods. When using the tracer method, easily identifiable inert gases are released from a stationary vehicle to help validate the assumed emission source.

 
 
Equipment used to release an air tracer
Truck used to release inert gas that helps identify test area
 
 
Inert gas equipment for tracer plume releases
Tanks and gauges on the stationary tracer release vehicle
 
 
Wheeling West Virginia air pollution
 
 

OZONE

Pennsylvania has made progress in reducing contributions to ground-level ozone concentrations. For the 37 counties designated as nonattainment for the previous (1997) 8-hour ozone NAAQS of 0.08 parts per million (ppm), EPA re-designated 25 counties to attainment after DEP demonstrated not only that the areas attain the standard but would be able to maintain that standard through 2018. Between 2007 and 2009, EPA redesignated the following counties as attainment for the 1997 ozone standard: Adams, Berks, Blair, Cambria, Carbon, Centre, Clearfield, Cumberland, Dauphin, Erie, Franklin, Greene, Indiana, Lackawanna, Lancaster, Lebanon, Lehigh, Luzerne, Mercer, Monroe, Northampton, Perry, Tioga, Wyoming, and York. While the seven county Pittsburgh area (Allegheny, Armstrong, Beaver, Butler, Fayette, Washington, and Westmoreland counties) has not been re-designated to attainment, air quality monitoring data from 2007-2009 indicates that the 1997 ozone standard has been attained.

In 2008, EPA lowered the 8-hour ozone standard to 0.075 (75 parts per billion). Most of the counties that previously met the 1997 standard did not meet this standard. Furthermore, the EPA agreed to reconsider the 8-hour ozone standard and in January 2010, proposed to lower the health-based standard and set a new secondary standard to protect the environment; the proposed standard ranged from 70 to 60 parts per billion.

EPA will issue final revised 8-hour ozone standards by July 29, 2011. The revised ozone NAAQS will pose significant attainment and maintenance challenges requiring additional reductions of NOx and VOC emissions across Pennsylvania. The use of natural gas, particularly as an alternative transportation fuel, contains significant advantages to achieving and maintain federal ozone NAAQS.

FINE PARTICULATE MATTER (PM2.5)

EPA has found that the following counties met the 1997 annual (PM2.5) standard of 15ug/m3 for fine particulate matter based on 2007-2009 data: Berks, Cambria, Cumberland, Dauphin, Indiana, Lebanon, Lancaster, and York. State Implementation Plan (SIP) revisions projecting attainment in 2010 have been submitted to EPA for the remaining areas: the Pittsburgh-Beaver Valley area (Allegheny, Armstrong, Beaver, Butler, Fayette, Washington, Westmoreland and portions of Indiana, Cambria, Lawrence and Greene counties) and the Philadelphia area (Bucks, Chester, Delaware, Montgomery and Philadelphia counties). The Liberty/Clairton SIP revision submitted to EPA will be revised to project attainment by December 2013.

In 2006, EPA established a more stringent 24-hour particulate standard and in December 2009 designated the following counties or portions thereof as nonattainment. Allegheny (and the Liberty/Clairton area separately), Armstrong, Beaver, Bucks, Butler, Cambria, Chester, Cumberland, Dauphin, Delaware, Fayette, Greene, Indiana, Lebanon, Lancaster, Lawrence Lehigh, Montgomery, Northampton, Philadelphia, Washington, Westmoreland, and York. SIP revisions are due to EPA in December 2012.

In order to achieve and maintain the PM 2.5 NAAQS across Pennsylvania, additional reductions of fine particulates and precursors of PM 2.5 including NOx and SO2 may be needed.

Source:
Governorís Marcellus Shale Advisory Commission
Commonwealth of Pennsylvania
7-22-2011

 

2011 Unconventional Natural Gas Emission Inventory in Pennsylvania

 

Marcellus Air
 
 

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