164. A secondary lead smelter or plant that processes, uses or remelts lead or lead compounds must not emit particles into the atmosphere in excess of the following limits:(1) 46 mg/Rm3 of dry gas in the case of smelting furnaces; and
(2) 23 mg/Rm3 of dry gas in the case of holding furnaces or kettle furnaces, lead oxide production, lead material handling or refuse units, or lead crushing, slagging, tapping, furnace cleaning or casting units.
In addition, a secondary lead smelter or plant that processes or uses lead or lead compounds must not emit lead into the atmosphere in excess of(1) 30 mg/Rm3 of dry gas in the case of the emission sources referred to in subparagraph 1 of the first paragraph; and
(2) 15 mg/Rm3 of dry gas in the case of the emission sources referred to in subparagraph 2 of the first paragraph.