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APPROVED FILED 

APPROVED 

JON BRUNING 

AUG 1 3 2008 ~]) AUG I 3 2008 ~V.%.~.:~ Assistant A~,oQ1ey, General 

~ ~HEINEMAN GOVERNOR ~ By (J)~ fi,.,.~ .. ,sJC]ETARY OF STATE DATE·······0f?·Y.ifl ........ . tI 

NEBRASKA ADMINISTRATIVE CODE 

Title 129 - Department of Environmental Quality 

Chapter 4 - AMBIENT AIR QUALITY STANDARDS 

The ambient air quality standards for the State of Nebraska are: 

001 Particulate Matter 

001.01 PMIO 

Prim my and secondary standards 

150 micrograms per cubic meter 

001.02 PM2.5 

24 hour average with not more than one exceedance per year 

(Attaimnent of these standards are detennined in accordance 

with Appendix K of 40 CFR Part 50 which is adopted and 

incorporated herein). 

Primary and secondary standards 

15.0 micrograms per cubic meter 

annual arithmetic mean 

35 micrograms per cubic meter 

24 hour average 

(Attainment of these standards is detennined in accordance 

with Appendix N of 40 CFR Part 50 which is adopted and 

incorporated herein). 

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Title 129 

Chapter 4 

002 Sulfur dioxide 

002.01 Primary standards 

80 micrograms per cubic metereO.03 ppm) 

annual arithmetic mean 

365 micrograms per cubic meter (0.14 ppm) 

maximum 24-hour concentration not to be exceeded 

more than once a year 

002.02 Secondary standard 

1300 micrograms per cubic meter (0.5 ppm) 

as a 3-hour concentration not to be exceeded 

more than once a year 

003 Nitrogen dioxide 

Primary and secondary standard 

100 micrograms per cubic meter (0.05 ppm) 

annual arithmetic mean 

004 Carbon monoxide 

4-2 

Primary and secondary standards 

10 milligrams per cubic meter (9 ppm) 

as a maximum 8-hour concentration not to be exceeded 

more than once a year 

40 milligrams per cubic meter (35 ppm) 

as a maximum I-hour concentration not to be exceeded 

more than once a year 

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Title 129 

Chapter 4 

005 Ozone 

006 Lead 

Primary and secondary standard 

235 micrograms per cubic meter (0.12 ppm) 

as a maximum I-hour concentration not to be exceeded 

more than one day a year 

(Attainment of this standard is determined in accordance 

with Appendix H of 40 CFR Part 50; which is adopted and 

incorporated herein). 

Primary and secondary standard 

0.08 parts per million (0.08 ppm) 

as a daily maximum 8-hour average concentration 

(Attainment of this standard is determined in accordance 

with Appendix I of 40 CFR Part 50; which is adopted and 

incorporated herein). 

Primary and secondary standard 

1.5 micrograms per cubic meter 

calendar quarter arithmetic mean 

007 Total reduced sulfur 

10.0 parts per million (10.0 ppm) 

maximum 1 minute average concentration 

0.1 0 parts per million (0.1 0 ppm) 

maximum 30-minute rollil1g average 

007.01 Except as provided in 007.01Aand 007.01B these standards apply 

only where human exposure occurs. 

AUG 13 2008 

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Title 129 

Chapter 4 

4-4 

007.01A Ambient concentrations of total reduced sulfur (TRS) 

emissions occurring as a result of natural activities that have no 

associated economic benefits, such as seasonal stratification or 

turnover of lakes and lagoons, and the release of water 

uncontaminated by process or industrial activity from lakes, 

reservoirs, lagoons and water impoundment systems shall not 

constitute violation ofthe standards contained in section 007. 

007.01B The Department shall provide reasonable opportunity for 

any owner or operator of any source causing or contributing to a 

violation of the standards in 007 to develop and implement a 

program to eliminate such violations prior to taking enforcement 

action. 

007.02 Unless otherwise approved by the Director, the levels ofTRS in 

the ambient air shall be measured using a TRS thermal converter in 

conjunction with an S02 monitor. The S02 monitor shall be 

designated as an EPA reference method or equivalent method in 

accordance with 40 CFR Part 53. In combination, the monitor must 

meet or exceed the following minimum specifications: 

007.02A Lower detection limit o[OA ppb (parts per billion); 

007.02B Zero Drift less than 0.5 ppb in 24 hours and less than 

1 ppb in 7 days at constant conditions; 

007.02C Span Drift of less than 0.5 percent of the reading in 

. 24 hours and less than 1 percent of the reading in 7 days at 

constant conditions; 

007..02D Precision of 0.5 percent ofthe reading; and 

007.02E Linearity of 1 percent of full scale. 

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Title 129 

Chapter 4 

007.03 A rolling average shall be considered valid if there is data for 

at least 75 percent of the period in question. In the event that less 

than 100 percent of the data are available, the rolling average shall be 

computed on the basis of the data available using the number of data 

available as the divisor. 

007.04 The standards are attained when all of the following conditions 

are met: 

007.04A The one-minute concentration is less than or equal to 

10.0 ppm, rounded to one decimal place (fractional parts equal to 

or greater than 0.05 ppm must be rounded up); 

007.04B The 30-minute rolling arithmetic mean concentration is less 

than or equal to 0.10 ppm, rounded to two decimal places (fractional 

patis equal to or greater than 0.005 ppm must be rounded up); 

Enabling Legislation: Neb. Rev. Stat. §§81-1504(1)(2), 81-1505(1)(12) 

Legal Citation: Title 129, Ch. 4, Nebraska Department of Environmental Quality 

APPROVED , 

AUG 1 3 Z008 ~» I 

APPROVED 

JON BRUNING 

~~~ CAVE HEINEMAN 

GOVERNOR 

By 

~v.~:'2.:~2!' Assistant A..tt9!ney General 

DATE ...... 0'-~t/?t. ...... ..... . 

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