W. Va. Code R. § 45-14-4

Current through Register Vol. XLI, No. 50, December 13, 2024

Section 45-14-4 - Ambient Air Quality Increments and Ceilings

4.1. No increases in pollutant concentrations over the baseline concentrations are allowed in excess of those listed below:

Maximum Allowable Pollutant Concentration Increase over Baseline Concentration (µg/m3)

Class I Areas

Particulate matter: PM2.5, Annual arithmetic mean1 PM2.5, 24-hour maximum2 PM10, Annual arithmetic mean4 PM10, 24-hour maximum8

Sulfur dioxide: Annual arithmetic mean2 24-hour maximum5 3-hour maximum 25

Nitrogen dioxide: Annual arithmetic mean2.5

Class II Areas

Particulate matter: PM2.5, Annual arithmetic mean4 PM2.5, 24-hour maximum9 PM10, Annual arithmetic mean17 PM10, 24-hour maximum30

Sulfur dioxide: Annual arithmetic mean20 24-hour maximum 91 3-hour maximum 512

Nitrogen dioxide: Annual arithmetic mean25

Class III

Particulate matter: PM2.5, Annual arithmetic mean8 PM2.5, 24-hour maximum18 PM10, Annual arithmetic mean 34 PM10, 24-hour maximum 60

Sulfur dioxide: Annual arithmetic mean40 24-hour maximum 182 3-hour maximum 700

Nitrogen dioxide: Annual arithmetic mean50

4.2. For any period other than an annual period, the applicable maximum allowable increase may be exceeded during one (1) such period per year at any one location.

4.3. No pollutant concentration shall exceed any primary or secondary air quality standard promulgated:

4.3.a. by the Secretary; or

4.3.b. by the US EPA.

W. Va. Code R. § 45-14-4