SECTION 112.9. Allowable Emission Rates--Combustion of Liquid Fuel

(a) No person may cause, suffer, allow, or permit emissions of sulfur dioxide (SO₂) from any liquid fuel-fired steam generator, furnace, or heater to exceed 440 parts per million by volume (ppmv) at actual stack conditions and averaged over a three-hour period.

(b) If a source has an effective stack height less than the standard effective stack height as determined from the equation:

Attached Graphic

then, the allowable emission concentration must be reduced by multiplying it by the short-stack reduction factor.

(c) No later than July 31, 1993, no person in Harris or Jefferson County may cause, suffer, allow, or permit the use of liquid fuel for combustion from any stationary liquid fuel-fired steam generator, furnace, or heater with a sulfur content greater than 0.3% by weight or emissions of SO₂ from any liquid fuel-fired steam generator, furnace, or heater to exceed 150 ppmv, as calculated based on 20% excess air and as averaged over a three-hour period. The requirements of this subsection are not intended to apply to sulfuric acid plants.

(d) Except as provided in subsection (e) of this section, beginning September 30, 1994, liquid fossil fuel-fired steam generators of greater than 250 MMBtu heat input per hour which are equipped with SO₂ control equipment shall be equipped with a continuous emissions monitoring system (CEMS) for SO₂. The CEMS shall be installed, calibrated, and operated as specified in 40 Code of Federal Regulations Part 51, Appendix P, hereby incorporated by reference.

(e) In lieu of the requirements of subsection (d) of this section, beginning September 30, 1994, sources subject to the Federal Clean Air Act, §412(c), as amended in 1990 shall meet the requirements of §412(c) and the regulations promulgated thereunder.

Source Note: The provisions of this §112.9 adopted to be effective October 23, 1992, 17 TexReg 7085