Section 326IAC20-13.1-6. Total enclosure requirements

   (a) The owner or operator of a secondary lead smelter shall operate the following process fugitive emissions sources and fugitive dust sources in a total enclosure that meets the requirements in subsection (c) that is maintained at negative pressure at all times and vented to a control device designed to capture lead particulate:

(1) Smelting furnaces.

(2) Smelting furnace charging areas.

(3) Lead taps, slag taps, and molds during tapping.

(4) Battery breakers.

(5) Refining kettles, casting areas.

(6) Dryers.

(7) Agglomerating furnaces and agglomerating furnace product taps.

(8) Material handling areas for any lead-bearing materials except those listed in subsection (b).

(9) Areas where dust from fabric filters, sweepings, or used fabric filters are processed.

  (b) The owner or operator of a secondary lead smelter is not required to maintain a total enclosure in the following areas unless the area is in a total enclosure described in subsection (a):

(1) Lead ingot product handling areas.

(2) Stormwater and wastewater treatment areas.

(3) Intact battery storage areas.

(4) Areas where lead-bearing material is stored in closed containers or enclosed mechanical conveyors.

(5) Areas where clean battery casing material is handled.

  (c) The owner or operator of a secondary lead smelter shall do the following:

(1) Construct and operate a total enclosure for the process fugitive emissions sources and fugitive dust sources listed in subsection (a) that is free of cracks, gaps, corrosion, or other deterioration that could allow lead-bearing material to be released from the primary barrier.

(2) Put measures in place to prevent the tracking of lead-bearing material out of the plant by personnel or by equipment used in handling the material.

(3) Designate an area to decontaminate equipment and collect and properly manage any rinsate.

(4) Ventilate the total enclosure for the process fugitive emissions sources and fugitive dust sources listed in subsection (a) continuously to ensure negative pressure values of at least thirteen-thousandths (0.013) millimeters of mercury (seven-thousandths (0.007) inches of water).

(5) Maintain an inward flow of air through all natural draft openings of the total enclosure.

(6) Inspect total enclosures and structures that contain any lead-bearing material at least once per month.

(7) Repair any gaps, breaks, separations, leak points, or other possible routes for emissions of lead to the atmosphere within one (1) week of identification unless the owner or operator of a secondary lead smelter receives approval for an extension from the department and U.S. EPA before the repair period is exceeded.

(Air Pollution Control Division; 326 IAC 20-13.1-6; filed Jan 30, 2013, 12:34 p.m.: 20130227-IR-326110774FRA; errata filed Jan 14, 2014, 8:39 a.m.: 20140129-IR-326140018ACA)