401 KAR 53:010. Ambient air quality standards.

 

      RELATES TO: KRS 224.20-100, 224.20-110, 224.20-120

      STATUTORY AUTHORITY: KRS 224.10-100

      NECESSITY, FUNCTION, AND CONFORMITY: KRS 224.10-100 requires the Environmental and Public Protection Cabinet to prescribe administrative regulations for the prevention, abatement, and control of air pollution. This administrative regulation is to fix ambient air quality standards necessary for the protection of the public health, the general welfare, and the property and people in this Commonwealth.

 

      Section 1. Ambient Air Quality Standards. The primary and secondary ambient air quality standards for sulfur oxides, particulate matter, carbon monoxide, ozone, nitrogen dioxide, lead, hydrogen sulfide, gaseous fluorides, total fluorides, and odors are specified in Appendix A of this administrative regulation. Measurements will be by methods specified in Section 2 of this administrative regulation.

 

      Section 2. Methods of Measurement. For those air contaminants for which there are state ambient air quality standards that are the same as the national ambient air quality standards, measurements shall be made according to reference methods, or their equivalent methods. For other air contaminants for which there are state ambient air quality standards, measurements shall be made according to methods as prescribed by the cabinet. The frequency of measurements for all air contaminants shall be prescribed by the cabinet.

 

      Section 3. Within sixty (60) days of promulgation or revision of any ambient air quality standard by the U.S. EPA, the cabinet shall initiate proceedings to promulgate or review this administrative regulation in conformance with the federal ambient air quality standards. (5 Ky.R. 376; Am. 997; eff. 6-6-79; 10 Ky.R. 432; eff. 3-1-84; 14 Ky.R. 1621; eff. 4-14-88; TAm eff. 8-9-2007.)

 


APPENDIX A TO 401 KAR 53:010

AMBIENT AIR QUALITY STANDARDS

The following air contaminant concentrations shall apply at any single point location:

CONTAMINANT

PRIMARY STANDARD

SECONDARY STANDARD

Sulfur Oxides (Sulfur Dioxide) mg/m3

Annual Arithmetic Mean, not to exceed

Maximum Twenty-Four-Hour Average

Maximum Three-Hour Average

 

80 (0.03 ppm)

365 (0.14 ppm)1

--

 

--

--

1300 (0.50 ppm)1

Particulate Matter, measured as PM10 - mg/m3

Annual Arithmetic Mean, not to exceed

Maximum Twenty-Four-Hour Average

 

502

1503

 

502

1503

Carbon Monoxide - mg/m3

Maximum Eight-Hour Average

Maximum One-Hour Average

 

10 (9 ppm)1

40 (35 ppm)1

 

Same as primary

Same as primary

Ozone - mg/m3

Maximum Average

 

235 (0.12 ppm)4

 

Same as primary

Nitrogen Dioxide - mg/m3

Annual Arithmetic Mean, not to exceed

 

100 (0.05 ppm)

 

Same as primary

Lead - mg/m3

Maximum Arithmetic Mean averaged over a calendar quarter

 

1.5

 

Same as primary

Hydrogen Sulfide - mg/m3

Maximum One-Hour Average

 

--

 

14 (0.01 ppm)1

Gaseous Fluorides - (expressed as HF) - mg/m3

Annual Arithmetic Mean, not to exceed

Maximum One-Month Average

Maximum One-Week Average

Maximum Twenty-Four-Hour Average

Maximum Twelve-Hour Average

 

400 (0.5 ppm)

--

--

800 (1.0 ppm)1

--

 

--

0.82 (1.00 ppb)1

1.64 (2.00 ppb)1

2.86 (3.50 ppb)1

3.68 (4.50 ppb)1

Total Fluorides - ppm

Dry weight basis (as fluoride ion) in and on forage for consumption by grazing ruminants

The following concentrations are not to be exceeded:

Average concentration of monthly samples over growing season (not to exceed 6 consecutive months)

Two-Month Average

One-Month Average

 

 

 

 

 

--

--

--

 

 

 

 

 

40 ppm (w/w)

60 ppm (w/w)

80 ppm (w/w)

Odors

 

At any time when 1 volume unit of ambient air is mixed with 7 volume units of odorless air, the mixture must have no detectable odor.

 


Footnotes:

1This average is not to be exceeded more than once per year.

2The standard is attained when the expected annual arithmetic mean concentration, as determined in accordance with Appendix K to 40 CFR 50, is less than or equal to fifty (50) mg/m3.

3The standard is attained when the expected number of days per calendar year with a twenty-four (24) hour average concentration above 150 mg/m3, as determined in accordance with Appendix K of 40 CFR 50, is equal to or less than one (1).

4The standard is attained when the expected number of days per calendar year with maximum hourly average concentrations above 0.12 ppm (235 mg/m3) is equal to or less than one (1), as determined by Appendix H of 40 CFR 50.