Section 327IAC3-6-22. Ventilation

   (a) Ventilation shall be provided for all pump stations.

  (b) No interconnection of ventilation systems shall exist between wet wells and dry wells.

  (c) All intermittently operated ventilation equipment shall be electrically interconnected with the respective lift station lighting systems.

  (d) All manual ventilation and lighting switches shall override any automatic controls.

  (e) All fan wheels shall be fabricated from nonsparking material.

  (f) Dry wells that are located underground shall be provided with mechanical ventilation in accordance with the following:

(1) Continuous ventilation that provides at least six (6) complete air changes per hour.

(2) Intermittent ventilation that provides at least thirty (30) complete air changes per hour.

(3) A combined ventilation consisting of ten (10) minutes of ventilation at a rate of thirty (30) complete air changes per hour followed by an automatic switch to six (6) complete air changes per hour may be used to conserve heat.

  (g) Wet wells with screens or mechanical equipment shall be equipped with permanently installed mechanical ventilation in accordance with the following:

(1) Continuous ventilation that provides at least twelve (12) complete air changes per hour.

(2) Intermittent ventilation that provides at least thirty (30) complete air changes per hour.

  (h) All pulleys and belts shall be of a static electricity dissipating type. (Water Pollution Control Division; 327 IAC 3-6-22; filed May 17, 1999, 12:11 p.m.: 22 IR 3096; readopted filed Apr 11, 2005, 2:45 p.m.: 28 IR 2470; readopted filed Jun 15, 2011, 11:15 a.m.: 20110713-IR-327110193BFA)