La. Admin. Code tit. 33 § III-711

Current through Register Vol. 50, No. 6, June 20, 2024

Section III-711 - Tables 1, 1a, 2- Air Quality

A. Table 1. Primary Ambient Air Quality Standards

Table 1. Primary Ambient Air Quality Standards
Air Contaminant	Maximum Permissible Concentration
PM10	150 [MICRO]g/m3	(Maximum 24-hour concentration not to be exceeded more than once per year averaged over a three-year period)
PM2.5	12 [MICRO]g/m3	(Annual arithmetic mean, averaged over 3 years) The standard is met when the annual arithmetic mean concentration, as determined in accordance with appendix N of 40 CFR Part 50 is less than or equal to 12 [MICRO]g/m3.
	35 [MICRO]g/m3	(24 -hour, averaged over 3 years) The standard is met when the 98th percentile 24-hour concentration, as determined in accordance with Appendix N of 40 CFR Part 50 is less than or equal to 35 ug/m3.
Sulfur Dioxide (SO2)	75 ppb daily maximum 1-hour concentration	The standard is met at an ambient air monitoring site when the 3-year average of the annual 99th percentile of the daily maximum 1-hour average concentration is less than or equal to 75 ppb, as determined in accordance with 40 CFR Part 50 appendix T.
Carbon Monoxide (CO)	10,000 [MICRO]g/m3	or 9 ppm (Maximum 8-hour concentration not to be exceeded more than once per year)
	40,000 [MICRO]g/m3	or 35 ppm (Maximum 1-hour concentration not to be exceeded more than once per year)
Ozone	0.075 ppm daily maximum 8-hour average	The standard is met at an ambient air monitoring site when the 3-year average of the annual fourth highest daily maximum 8 -hour average ozone concentrations is less than or equal to 0.075 ppm, as determined in accordance with 40 CFR Part 50, appendix P.
Nitrogen Dioxide (NO2)	53 ppb	(Annual arithmetic mean) The Standard is met when the annual arithmetic mean is less than or equal to 53 ppb, as determined in accordance with 40 CFR Part 50, appendix S.
	100 ppb	(1-hour average concentration) The standard is met when the 3-year average of the annual 98th percentile of the daily maximum 1-hour average concentration is less than or equal to 100 ppb, as determined in accordance with 40 CFR Part 50, appendix S.
Lead	0.15 [MICRO]g/m3	(3-month rolling average) (The standard is met when the maximum arithmetic 3-month mean concentration for a 3-year period, as determined in accordance with appendix R of 40 CFR Part 50 is less than or equal to 0.15 [MICRO]g/m3.

1. The contribution of any contaminant by a single source property shall be measured as the difference between the upwind level and the downwind level for the property, using methods approved by the administrative authority, or by the use of suitable engineering techniques such as source dispersion calculations.

2. National primary ambient air quality standards define levels of air quality that the A dministrator of the Environmental Protection Agency judges to be necessary, with an adequate margin of safety, to protect the public health.

B. Table 1a. Secondary Ambient Air Quality Standards

Table 1a. Secondary Ambient Air Quality Standards
Air Contaminant	Maximum Permissible Concentration
PM10	150 [MICRO]g/m3	(Maximum 24-hour concentration not to be exceeded more than once per year averaged over a three-year period)
Sulfur Dioxide (SO2)	0.5 ppm	(3-hour average concentration not to be exceeded more than once per year)
PM2.5	15.0 [MICRO]g/m3	(Annual arithmetic mean, averaged over 3 years) The standard is met when the annual arithmetic mean concentration, as determined in accordance with appendix N of 40 CFR Part 50 is less than or equal to 15 [MICRO]g/m3.
	35 [MICRO]g/m3	(24-hour, averaged over 3 years) The standard is met when the 98th percentile 24-hour concentration, as determined in accordance with appendix N of 40 CFR Part 50 is less than or equal to 35 [MICRO]g/m3.
Carbon Monoxide (CO)	10,000 [MICRO]g/m3	or 9 ppm (Maximum 8-hour concentration not to be exceeded more than once per year)
	40,000 [MICRO]g/m3	or 35 ppm (Maximum 1-hour concentration not to be exceeded more than once per year)
Ozone	0.075 ppm daily maximum 8-hour average	The standard is met at an ambient air monitoring site when the 3-year average of the annual fourth highest daily maximum 8-hour average ozone concentrations is less than or equal to 0.075 ppm, as determined in accordance with 40 CFR Part 50, appendix P.
Nitrogen Dioxide (NO2)	100 [MICRO]g/m3	(0.053 ppm) (Annual arithmetic mean) The Standard is met when the annual arithmetic mean concentration in a calendar year is less than or equal to 0.053 ppm.
Lead	0.15 [MICRO]g/m3	(3-month rolling average) (The standard is met when the maximum arithmetic 3-month mean concentration for a 3-year period, as determined in accordance with appendix R of 40 CFR Part 50 is less than 0.15 [MICRO]g/m 3.

1. The contribution of any contaminant by a single source property shall be measured as the difference between the upwind level and the downwind level for the property, using methods approved by the administrative authority, or by the use of suitable engineering techniques such as source-dispersion calculations.

2. National secondary ambient air quality standards define levels of air quality that the A dministrator of the Environmental Protection Agency judges to be necessary to protect the public welfare from any known or anticipated adverse effects of a pollutant.

C. Table 2. Ambient Air3/4Methods of Contaminant Measurement

Table 2. Ambient Air-Methods of Contaminant Measurement
Air Contaminant	Sampling Interval	Analytical Method
PM10	24 hours	Reference method based on appendix J to 40 CFR 50 and designated in accordance with 40 CFR 53, or an equivalent method designated in accordance with 40 CFR 53.
PM2.5	24 hours	Reference method based on appendix L to 40 CFR Part 50 and designated in accordance with 40 CFR Part 53 or an equivalent method designated in accordance with 40 CFR Part 53.
Sulfur Dioxide	24 hours	Reference method based on appendix A-1 or A-2 to 40 CFR Part 50 or an equivalent method designated in accordance with 40 CFR Part 53.
	Continuous	Reference method based on appendix A-1 or A-2 to 40 CFR Part 50 or an equivalent method designated in accordance with 40 CFR Part 53.
Total Oxidants	Continuous	Reference method based on appendix D to 40 CFR Part 50 and designated in accordance with 40 CFR Part 53 or an equivalent method designated in accordance with 40 CFR Part 53.
Carbon Monoxide	Continuous	Any method complying with reference or equivalent methods in Title 40, Code of Federal Regulations, Part 50, appendix C, and Part 53, Subpart B.
Nitrogen Dioxide	24 hours	Reference method based on appendix F to 40 CFR Part 50 or an equivalent method designated in accordance with 40 CFR Part 53.
Lead	24 hours	Reference method based on appendix G to 40 CFR Part 50 or an equivalent method designated in accordance with 40 CFR Part 53.

La. Admin. Code tit. 33, § III-711

Promulgated by the Department of Environmental Quality, Office of Air Quality and Nuclear Energy, Air Quality Division, LR 13:741 (December 1987), amended LR 14:348 (June 1988), amended by the Office of the Secretary, Legal Affairs Division, LR 32:1602 (September 2006), LR 34:433 (March 2008), amended by the Office of the Secretary, Legal Division, LR 40:1690 (September 2014), LR 41:669 (April 2015).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2054.