40 CFR § 426.130
Applicability; description of the hand pressed and blown glass manufacturing subcategory
June 9, 2020
The provisions of this subpart are applicable to discharges resulting from the process by which raw materials are melted in a furnace and processed by hand into pressed or blown glassware. This includes those plants which:
(a) Produce leaded glass and employ hydrofluoric acid finishing techniques,
(b) Produce non-leaded glass and employ hydrofluoric acid finishing techniques, or
(c) Produce leaded or non-leaded glass and do not employ hydrofluoric acid finishing techniques.