Environmental Services Program
Dunklin High School
Site Operator: Missouri Department of Natural Resources' Environmental Services Program.
Primary: 0.15 µg/m3
Secondary: Same as the primary standard
On Nov. 12, 2008, EPA substantially strengthened the National Ambient Air Quality Standards for lead (see 73 FR 66964). EPA lowered the level of the primary (health-based) standard from 1.5 micrograms per cubic meter (µg/m3) to 0.15 µg/m3, measured as total suspended particles. EPA also revised the secondary (welfare-based) standard to be identical to the primary standard.
The standard is based on the highest rolling three-month average over a period of three years and two months. The standard is met at a monitoring site when the three-month average is less than or equal to 0.15 μg/m3. For specific rules and technical information, consult 40 CFR Pt. 50, Appendix R.
The units for all averages in this table are micrograms per cubic meter. Data in this table, is calculated at local conditions using daily average temperature and barometric pressure. Lead is sampled on a set schedule. Results in this table are a combination of samples for this site taken on an every third day run schedule.
Disclaimer: The following data is calculated using the lead National Ambient Air Quality Standards regulations. Yearly and quarterly data shown below has been subject to data review and validation procedures by the department. Monthly data has been reviewed and verified by the monitoring agency.
Updated: Data shown is historical and will not be updated. More present data is updated in the tables above.
The quarterly average must not exceed 1.5 µg/m3.
For more information visit EPA's Lead in Air webpage.
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. All data in this table is historical and will not be updated.
Updated: Data is historical. Instrument has been discontinued.
National Ambient Air Monitoring Standard: A three-hour average of 0.50 parts per million (ppm) and/or a 24-hour average of 0.14 ppm and/or an annual average of 0.03 ppm. Data reported in three decimal places must be rounded to two decimal places.
Exceedances allowed without a violation being recorded: One per year.
Disclaimer: Yearly and quarterly data shown below has been subject to data review and validation procedures by the reporting agency. Monthly data and data shown graphically is raw, unreviewed and unvalidated data.
|Old High School Site|
|2001 (Second Quarter Instrument moved to: J-CREEK)|
|2004 (First Quarter Instrument moved to: Main Street)|