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Fenceline Monitoring Instruments
Airflow/Wind Measurements

Local wind conditions will be measured using meteorological systems that will measure wind speed, wind direction, temperature, and relative humidity. The wind speed and direction measurements can be used to identify the source of gas detections, as well as predict what direction the plume is travelling. The temperature and relative humidity measurements are used to predict when environmental factors such as fog will be present. Each monitoring location will have a MetOne metrological system.
Hydrogen Sulfide

Hydrogen Sulfide (H2S) will be measured by open path Tunable Diode Lasers (TDLs). Open-path H2S TDLs are currently deployed at other facilities in the Bay Area. The units were part of the original fence line installation in the late 1990s.
Organic Compounds & Sulfur Dioxide
Organic compounds and sulfur dioxide will be measured by open path ultraviolet spectral absorbance analysis. The systems are manufactured by Argos Scientific, and are currently deployed at other facilities in the Bay Area.

Community Monitoring Instruments
Ammonia

Ammonia gas will be measured using a Teledyne model T201 NH3 analyzer. The system is used to measure ammonia at levels commonly found in the ambient air. The system has a detection range of 0-50 ppb for ammonia.
Particulate Matter of Size 2.5 Microns (PM 2.5)

Particulate Matter of size 2.5 microns (PM 2.5) will be analyzed using a MetOne BAM 1020 PM 2.5 particulate monitor. The Bay Area Air Quality Management District uses these systems as part of their ambient air monitoring network.
Black Carbon

The black carbon air monitoring system detects particles in the air associated with vehicle emissions, soot from wood burning, and particles associated with forest fires. The system that will be used for this study is a Teledyne API Model 633 Black Carbon Monitor.
Hydrogen Sulfide

Hydrogen Sulfide gas will be measured using a Teledyne model T101 H2S analyzer. The system is used to measure hydrogen sulfide at levels commonly found in the ambient air. The system has a detection range of 0-500 ppb for Hydrogen Sulfide.
Aromatic Gases and Ozone Precursors

Aromatic gases and ozone precursors will be measured using a real-time gas chromatograph manufactured by Synspec, Inc. The system is capable of detecting multiple gases on a continuous basis. A similar system that measures mercaptans is currently being used at other facilities in the Bay Area.
Airflow/Wind Measurements

Local wind conditions will be measured using meteorological systems that will measure wind speed, wind direction, temperature, and relative humidity. The wind speed and direction measurements can be used to identify the source of gas detections, as well as predict what direction the plume is travelling. The temperature and relative humidity measurements are used to predict when environmental factors such as fog will be present. Each monitoring location will have a MetOne metrological system.
Metals Sampling

Metals sampling will entail using a PM10 air sampler that draws ambient air through a sample filter that captures particulate matter containing metals.  Once the sample has drawn ambient air through the filter for a set sample period, the filter is then removed from the sampling system and analyzed at an EPA accredited laboratory.

Event Monitoring Instruments
Poly-aromatic hydrocarbons (PAHs)

PAH sampling will entail using a polyurethane foam sampler (PUF) that draws ambient air through a sample filter that captures polycyclic aromatic hydrocarbons (PAHs). Once the sample has drawn ambient air through the filter for a set sample period, the filter is then removed from the sampling system and analyzed at an EPA accredited laboratory. 

Enhanced VOC Sampling

Enhanced VOC sampling will entail using an air sampler that draws ambient air through into a tedlar bag that captures a sample of the ambient air. Once the sample has been drawn into the tedlar bag, the bag is then removed from the sampling system and analyzed at an EPA accredited laboratory.

   
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