40 CFR §63.1158 — Emission standards for new or reconstructed sources.

1. (a)Pickling lines
   1. (1)Continuous pickling lines. No owner or operator of a new or reconstructed affected continuous pickling line at a steel pickling facility shall cause or allow to be discharged into the atmosphere from the affected pickling line:
      1. (i)Any gases that contain HCl in a concentration in excess of 6 ppmv; or
      2. (ii)HCl at a mass emission rate that corresponds to a collection efficiency of less than 99 percent.
   2. (2)Batch pickling lines. No owner or operator of a new or reconstructed affected batch pickling line at a steel pickling facility shall cause or allow to be discharged into the atmosphere from the affected pickling line:
      1. (i)Any gases that contain HCl in a concentration in excess of 18 ppmv; or
      2. (ii)HCl at a mass emission rate that corresponds to a collection efficiency of less than 97 percent.
2. (b)Hydrochloric acid regeneration plants.
   1. (1)No owner or operator of a new or reconstructed affected plant shall cause or allow to be discharged into the atmosphere from the affected plant any gases that contain HCl in a concentration greater than 12 ppmv.
   2. (2)In addition to the requirement of paragraph (b)(1) of this section, no owner or operator of a new or reconstructed affected plant shall cause or allow to be discharged into the atmosphere from the affected plant any gases that contain Cl2 in a concentration in excess of 6 ppmv.