35 Ill. Adm. Code 370.730
Protection and Service Facilities
Section 370
Section 370.730 Protection
and Service Facilities
a) Operator Protection
All settling tanks shall be equipped to enhance safety for
operators. Such features shall appropriately include machinery covers, life
lines, stairways, walkways, handrails and slip-resistant surfaces. If
sidewalls are extended more than three feet above the liquid level or four feet
above ground level, convenient walkways must be provided to facilitate
housekeeping and maintenance.
b) Mechanical Maintenance Access
The design shall provide for convenient and safe access to
routine maintenance items such as gear boxes, scum removal mechanisms, baffles,
weirs, inlet stilling baffle area, and effluent channels.
c) Electrical Fixtures and Controls
Electrical fixtures and controls in enclosed settling basins
shall meet the requirements of the National Electric Code for Class I, Group D,
Division 1 locations. The fixtures and controls shall be located so as to
provide convenient and safe access for operation and maintenance. Adequate
area lighting shall be provided.