(a) The owner or operator of any kraft pulp mill subject to §112.51 of this title (relating to Emissions Limits for TRS Compounds from Kraft Pulp Mills) or §112.53 of this title (relating to Alternate Emissions Limitations) shall conduct continuous monitoring beginning July 31, 1991, in accordance with the Monitoring of Emissions and Operations promulgated by the Environmental Protection Agency at 40 Code of Federal Regulations 60.284, hereby incorporated by reference, except:
  (1) omit 40 Code of Federal Regulations 60.284(a)(1), relating to opacity monitoring;
  (2) omit 40 Code of Federal Regulations 60.284(d)(1), relating to reporting of recovery furnace excess TRS emissions and opacities;
  (3) omit 40 Code of Federal Regulations 60.284(d)(2), relating to reporting of lime kiln emissions;
  (4) omit 40 Code of Federal Regulations 60.284(e)(1)(ii), relating to opacity violations;
  (5) omit all references to the black liquor oxidation system and brown stock washing system;
  (6) substitute emission standards in 40 Code of Federal Regulations 60.284(d) with those stated in §112.51 of this title (relating to emissions Limits for TRS Compounds from Kraft Pulp Mills) or approved under §112.53 of this title (relating to Alternate Emissions Limitations); and
  (7) substitute the term "administrator" with "executive director."
(b) Emissions data from continuous monitors required by subsection (a) of this section shall be processed in the following manner.
  (1) Data shall be calculated on a 12-hour average basis for the two consecutive periods of each operating day. Each 12-hour average shall be determined as the arithmetic mean of the appropriate 12 consecutive one-hour average TRS concentrations provided by each continuous monitoring system required under subsection (a) of this section.
  (2) Data indicating exceedances of emissions standards specified in §112.51(b) of this title (relating to Emissions Limits for TRS Compounds from Kraft Pulp Mills) shall not be considered excessive if the executive director determines that the facility is maintained and operated in a manner consistent with good air pollution control practices and the following conditions are met:
    (A) excess emissions are associated with startup, shutdown, or malfunction;
    (B) no more than 1.0% of the 12-hour averages in each calendar quarter exceed applicable limits for recovery furnaces; or
    (C) no more than 2.0% of the 12-hour average in each calendar quarter exceed 20 ppm for lime kilns.
(c) The owner or operator of any kraft pulp mill affected by subsection (a) of this section shall maintain the following records for two years and shall make such records available to authorized representatives of the Texas Air Control Board and/or local air pollution control agencies upon request:
  (1) daily records of the continuous emissions monitoring data consisting of 12-hour averaged TRS emissions;
  (2) results of any stack tests conducted in accordance with §112.51(c) of this title (relating to Emissions Limits for TRS Compounds from Kraft Pulp Mills; and
  (3) results of quarterly inspections as required by §112.55 of this title (relating to Inspection Requirements).

Source Note: The provisions of this §112.57 adopted to be effective July 14, 1989, 14 TexReg 3203.