Dunklin High School

Environmental Services Program

Dunklin High School

Site Operator: Missouri Department of Natural Resources' Environmental Services Program.

Pollutants Monitored: Sulfur Dioxide (SO2), Lead (Pb)

Lead (Pb)

National Ambient Air Monitoring Standard:

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.

The units for all averages in this chart are micrograms per cubic meter.
Year	Month	Monthly Average	3-Month Rolling Average	Month	Monthly Average	3-Month Rolling Average
2011	January	0.08173	0.17	July	0.18783	0.35
	February	0.177066	0.15	August	0.137109	0.22
	March	0.310527	0.19	September	0.10095	0.14
	April	0.34024	0.28	October	0.20676	0.15
	May	0.49791	0.38	November	0.19188	0.17
	June	0.34942	0.4	December	0.07991	0.16

2013	January	0.053936	0.2	July
	February	0.11644	0.1	August
	March	0.090411	0.09	September
	April			October
	May			November
	June			December

2012	January	0.111836	0.13	July	0.19934	0.29
	February	0.11413	0.1	August	0.31345	0.26
	March	0.10319	0.11	September	0.22875	0.25
	April	0.10458	0.11	October	0.15836	0.23
	May	0.41937	0.21	November	0.46528	0.28
	June	0.2572	0.26	December	0.12598	0.25

2010	January	0.123711	0.2	July	0.1304	0.2
	February	0.08246	0.12	August	0.25137	0.24
	March	0.38587	0.2	September	0.27667	0.22
	April	0.47098	0.31	October	0.16185	0.23
	May	0.1405222	0.33	November	0.23466	0.22
	June	0.327177	0.31	December	0.18358	0.19

2009	January	0.13	0.24	July	0.218	0.230
	February	0.536	0.349	August	0.173	0.201
	March	0.498	0.386	September	0.02	0.137
	April	0.124	0.386	October	0.259	0.151
	May	0.262	0.295	November	0.319	0.199
	June	0.211	0.199	December	0.148	0.242

Photograph of Dunklin High School lead sampler.

Updated: Data shown is historical and will not be updated. More present data is updated in the tables above.

National Ambient Air Monitoring Standard:

Quarterly Average

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.

The units for all averages in this chart are micrograms per cubic meter.
Year	Number of Exceedances	Maximum 3-Month Average	Maximum 24-Hour Average
1993	1	1.79	8.54
1994	2	2.09	13.15
1995	1	1.85	8.04
1996	3	2.27	10.60
1997	0	1.53	9.23
1998	0	1.45	9.25
1999	0	1.20	7.38
2000	1	1.99	11.50
2001	3	4.50	39.80
2002	0	.73	3.18
2003	0	.390	4.14
2004	0	.47	3.06
2005	0	.37	2.35
2006	0	.37	3.69
2007	0	.52	4.71
2008	0	.42	5.4050

Sulfur Dioxide (SO2)

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.

The units for all averages in this chart are parts per million.
Year	Number of Exceedances	Annual Average	Maximum 24-Hour Average	Maximum 3-Hour Average	Maximum 1-Hour Average
Old High School Site
1993	0	.010	.100	.298	.488
1994	0	.010	.057	.280	.580
1995	0	.010	.081	.298	.452
1996	0	.010	.097	.327	.612
1997	0	.007	.074	.260	.464
1998	0	.004	.029	.143	.259
1999	0	.004	.030	.132	.192
2000	0	.004	.032	.98	.131
2001 (Second Quarter Instrument moved to: J-CREEK)
2001	0	.004	.025	.109	.224
2002	0	.0043	.045	.210	.317
2003	0	.0044	.054	.181	.493
2004 (First Quarter Instrument moved to: Main Street)