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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 PM 2 . 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).

4-1

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. " ,. , . • 0**~ '~CJ** **~~ ,.~~.o,,~~~~n.'~«~~~~~I~~**  ••**~.** l**t-.·~·** 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 th an once a year



## AUG 13 

# wesTi tl e 1 29 Ch ap ter 4 00 5 Ozone

00 6 Lead Primary and secondary standard 235 micrograms per cubic meter (0.12 ppm)

as a maxi mum I-hour concentr ation not to b e exceeded more th an 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 microgram s per cubic meter

cal e ndar quarter ari thmetic mean 00 7 To tal redu ced sul fur 10
. 0 parts p e r million (10
. 0 ppm) maximum 1 minute av erag e concentration 0.1 0 parts per million (0.1 0 ppm)

maximum 30

-minute rollil1g av e rage 007.01 Ex cept as provided in 007
. 01Aand 007
. 01B these standards apply only where human exposure occurs.



### AUG 13 2008 4

- 3.1
... 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 con ditions; 007..02D Precision of 0.5 percent ofthe reading; and 00 7. 02E Linearity of 1 percent of fu ll scale
.

" , . , 

## AUG 1 S 2 0

08

' . - . '.i' ,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 les s 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 Z 0

08

# ~» I 

## APPROVED JON BRUNING

# ~~~ CAV E H EIN E MAN

GOVE RNO R

By

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

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

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