Volatile Organic Compounds (VOCs) are gases emitted from certain solids or liquids. Some of these gases may have short or long term health effects. Examples of VOCs include benzene, toluene, xylene, and Freon 113. There are no National Ambient Air Quality Standards for VOCs.
The samples will be collected every 12 days for a 24 hour period beginning at midnight. Air samples will be collected using SUMMA canisters and analyzed for 72 compounds. Samples are analyzed using a modified US EPA TO-14A. The method detection limit for the 72 compounds ranges from 0.10 to 0.50 parts per billion (ppb).
A wind rose for the same 24 hour sampling period is generated for each sampling period from the meteorological equipment at the monitoring site. The wind direction is in degrees and represents the direction the wind is blowing from. For example, 90 degrees means the wind is coming from the east and blowing towards the west.
Definition of Data Qualifying Flags
For historical data, please contact us.