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Outdated Standard Exemptions 1-6, September 23, 1982

Outdated Title 30 TAC 116 Standard Exemptions organized by exemption number and date.

Standard Exemption List

Clicking on a highlighted number below links you to the standard exemption.

1 | 2 | 3 | 4 | 5 | 6

1. Equipment, machines, devices, contrivances built or installed to be used at a domestic residence for domestic use.

2. Dual-chambered incinerators with a burner in the secondary chamber that maintains a temperature of 1200 degrees F or higher and with a burning capacity of less than 1000 pounds per hour for type 0, type I and type II waste only and which meet the following conditions. Types of waste are defined by the U.S. Environmental Protection Agency in Field Operations and Enforcement Manual for Air Pollution Control, Volume II, APTD-1101.

  1. Operating instructions must be posted at the incinerator.
  2. Fuel shall be sweet natural gas or No. 2 fuel oil with less than 0.5% sulfur by weight.

3. Combustion units designed for comfort heating purposes employing only natural gas as a fuel.

4. Comfort air conditioning systems or comfort ventilating systems which are not used to remove air contaminants generated by or released from specific units of equipment.

5. Integral IC engine driven air compressor, integral IC engine driven electric generator sets and integral IC engine driven water pumps, used only for portable, emergency and/or standby services; and all electric motors, provided that maximum annual operating hours shall not exceed 10% of the normal annual operating schedule of the primary equipment without prior written approval of the Executive Director.

For purposes of this exemption "standby" means to be used as a "substitute for", and not "in addition to" other equipment.

6. Gas or liquid fuel fired stationary internal combustion engines or gas turbines, provided that all proposed engines and turbines meet the following conditions:

1. Within no later than 10 days after construction of the facility begins, the facility shall be registered with Form PI-7, including applicable information concerning BACT and the air quality in the area of the proposed facility. [See (2) and (3) below].
2. The emissions of NOx (NO plus NO2) are no more than 5.0 grams per horsepower-hour for all such engines and turbines purchased new after the effective date of this Standard Exemption and rated at 825 horsepower or more. Documentation is required.

3. There will be no existing or projected violations of any NAAQS in the area of the proposed facility. Compliance with this condition shall be demonstrated by one of the following three methods:

(a) Ambient sampling or dispersion modeling accepted or performed by the Executive Director. (For these purposes TACB models TEM-8 and TCM-2 and EPA Model ISC are acceptable, and all existing stationary sources within 1/4 mile of the proposed facilities and the proposed facilities must be considered.)

Unless otherwise documented by actual test data, the following NO2/NOx ratios shall be used for modeling NO2 NAAQS:

Device NOx Emis. Rate (Q) gm/hp-hr NO2/NOx Ratio
IC Engine Less than 2.0 0.4
IC Engine 2.0 thru 10.0 0.15 + (0.5/Q)
IC Engine Greater than 10.0 0.2
Turbines 0.25
IC Engine with catalytic converter 0.85

(b) All existing and proposed engine and turbine exhaust is released to the atmosphere at a height at least twice the height of surrounding obstructions to wind flow. Buildings, open sided roof structures and covers are considered as obstructions.
(c) The total emissions of NOx (NO plus NO2) from all existing and proposed facilities on the property do not exceed 250 tons per year and the value (0.3125 D), where D equals the shortest distance in feet from any existing or proposed stack to the nearest property line.

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