N.H. Code Admin. R. Env-A 606.02

Current through Register No. 25, June 20, 2024

Section Env-A 606.02 - Applicability

(a) Except as provided in (c), below, an air pollution dispersion modeling impact analysis shall be performed in accordance with this part as part of the application for a permit for any of the following sources or devices:

(1) A new stationary source with any source or device that, after construction or installation, will meet or exceed any applicable threshold in Env-A 607.01;

(2) An existing stationary source that constructs or installs a new process or device that, after construction or installation, will meet or exceed any applicable threshold in Env-A 607.01;

(3) An existing stationary source that modifies an existing source or device that meets or exceeds any applicable threshold in Env-A 607.01, resulting in an increase in allowable emissions as follows:

a.Annual or hourly emissions of nitrogen oxides, sulfur dioxide, or PM₁₀; or

b.Emissions equal to or greater than 5 pounds per hour of carbon monoxide; or

(4) Any stationary source with emissions of regulated toxic air pollutants using the compliance demonstration method specified in Env-A 1405.02.

(b) An existing stationary source shall update its air pollution dispersion modeling impact analysis performed pursuant to this part prior to making a modification that will result in any of the following:

(1) Reduction in stack height;

(2) Increase in effective stack diameter;

(3) Obstruction of the stack exit;

(4) Change in stack exit orientation;

(5) Reduction in stack exit temperature by the lesser of 10% or 40 degrees F;

(6) Reduction in stack flow by the lesser of 10% or 1,000 actual cubic feet per minute; or

(7) Change in stack location.

(c) An air pollutant emission dispersion modeling analysis for regulated air pollutants shall not be required for any of the following devices:

(1) An emergency generator or other engines used for mechanical power in emergencies, such as fire pump engines, where the hours of operation are limited to 500 hours per year or less by an enforceable permit condition;

(2) A non-metallic mineral processing plant equipped with dust suppression controls operated to prevent, abate, and control the emission of fugitive dust as specified in Env-A 2800;

(3) Any source or device that meets or exceeds only VOC or HAP thresholds in Env-A 607.01;

(4) Any source or device being modeled solely to determine compliance with Env-A 1400 in accordance with Env-A 606.02(a)(4); or

(5) Any device equipped with a vertical and unobstructed emission stack located at a stationary source with facility-wide allowable emission rates less than all of the following:

a.100 tons per calendar year of carbon monoxide;

b.40 tons per calendar year of nitrogen oxides;

c.40 tons per calendar year of sulfur dioxide; and

d.15 tons per calendar year of PM₁₀.

N.H. Code Admin. R. Env-A 606.02

#6342-B, eff 9-28-96; ss by #7879, eff 4-26-03; amd by #9791, eff 10-1-10; amd by #9906, INTERIM, eff 4-26-11, EXPIRES: 10-24-11; ss by #10000, eff 10-1-11; ss by #10175, eff 9-1-12