Circle Street Site
Site Operator: Missouri Department of Natural Resources' Environmental Services Program
Pollutants Monitored: Lead (Pb)
Updated: Historical data only sampling was discontinued September 2009
Lead is sampled on a 24-hour basis, one sample every sixth day. The rolling three-month average must not exceed 0.15 µg/m3. (Final rule signed Oct. 15, 2008)
The quarterly average must not exceed 1.5 µg/m3.
Previous standard was a three-month average of 1.5 ug/m3 (micrograms per cubic meter).
For more information please see the following link http://epa.gov/air/lead/actions.html
Exceedances allowed without a violation being recorded: None
Disclaimer: The following table is a summary of Lead data (through 2008) calculated using the previous Lead National Ambient Air Quality Standards regulations, which compares a quarterly average to1.5 μg/m3. Data was calculated using EPA standard conditions of ambient temperature and barometric pressure. Data in this table, from Jan. 1, 2009 to the present, is calculated at local conditions using daily average temperature and barometric pressure. All data in this table is historical and will not be updated.
|2009 (Site discontinued September 2009)|