326 IAC 14-9-3 Light-oil sumps

Sec. 3. (a) The provisions of this section apply to the owner or operator of light-oil sumps. (1) Each owner or operator of a light-oil sump shall enclose and seal the liquid surface in the sump to form a closed system to contain the emissions. (2) Subdivision (1) shall not apply if, the owner or operator elects to install, operate, and maintain a vent on the light-oil sump cover. Each vent pipe must be equipped with a water leg seal, a pressure relief device, or vacuum relief device. (3) Subdivision (1) shall not apply if, the owner or operator elects to install, operate, and maintain an access hatch on each light-oil sump cover. Each access hatch must be equipped with a gasket and a cover, seal or lid that must be kept in a closed position at all times, unless in actual use. (4) The light-oil sump cover may be removed for periodic maintenance but must be replaced with a seal at completion of the maintenance operation. (b) The venting of steam or other gases from the by-product process to the light-oil sump is not permitted. (c) Following the installation of any control equipment used to meet the requirements of subsection (a), the owner or operator shall monitor semiannually the connections and seals on each control system to determine if it is operating with no detectable emissions, using 40 CFR Part 60, Appendix A, Method 21, and the procedures specified in 326 IAC 14-8-3(b) and 40 CFR Part 61, Subpart V, Section 61.245(c). The owner or operator also shall conduct on a semiannual basis a visual inspection of each source including sealing materials for evidence of visible defects such as gaps or tears. (1) If an instrument reading indicates an organic chemical concentration of more than 500 ppm above a background concentration, as measured by 40 CFR Part 60, Appendix A, Method 21, a leak is detected. (2) If visible defects such as gaps in sealing materials are observed during visual inspection, a leak is detected. (3) A first attempt at repair of any leak or visible defect shall be made no later than five (5) calendar days after each leak is detected. (4) When a leak is detected, it shall be repaired as soon as practicable, but not later than fifteen (15) calendar days after it is detected.