Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 370 - ILLINOIS RECOMMENDED STANDARDS FOR SEWAGE WORKS › Subpart D - SEWAGE PUMPING STATIONS › Section 370.450 - Emergency Operation

Current through Register Vol. 48, No. 28, July 12, 2024
a)
				Objective
The objective of emergency operation is to prevent the
				  discharge of raw or partially treated sewage to any waters and to protect
				  public health by preventing back-up of sewage and subsequent discharge to
				  basements, streets, and other public and private property.
b) Emergency Pumping Capability
Provision of emergency pumping capability is mandatory and
				  may be accomplished by connection of the station to at least two independent
				  utility substations, or by provision of portable or in-place internal
				  combustion engine equipment which will generate electrical or mechanical
				  energy, or by the provision of portable pumping equipment. Emergency standby
				  systems shall have sufficient capacity to start up and maintain the total rated
				  running capacity of the station. Regardless of the type of emergency standby
				  system provided, a riser from the force main with rapid connection capabilities
				  and appropriate valving shall be provided for all lift stations to hook up
				  portable pumps.
c)
				Emergency High Level Overflows
For use during possible periods of extensive power outages,
				  mandatory power reductions, or uncontrollable emergency conditions,
				  consideration should be given to providing a controlled, high-level wet well
				  overflow to supplement alarm systems and emergency power generation in order to
				  prevent backup of sewage into basements, or other discharges which may cause
				  severe adverse impacts on public interests, including public health and
				  property damage. Where a high level overflow is utilized, consideration shall
				  also be given to the installation of storage/detention tanks, or basins, which
				  shall be made to drain to the station wet well. Where such overflows affect
				  public water supplies or waters used for culinary or food processing purposes,
				  a storage detention basin, or tank, shall be provided having 2-hour detention
				  capacity at the anticipated overflow rate.
d) Equipment Requirements
1) General
The following general requirements shall apply to all
				  internal combustion engines used to drive auxiliary pumps, service pumps
				  through special drives, or electrical generating equipment:
A) Engine Protection
The engine must be protected from operating conditions that
				  would result in damage to equipment. Unless continuous manual supervision is
				  planned, protective equipment shall be capable of shutting down the engine and
				  activating an alarm on site and as provided in Section 370.135. Protective
				  equipment shall monitor for conditions of low oil pressure and overheating,
				  except that oil pressure monitoring will not be required for engines with
				  splash lubrication.
B) Size
The engine shall have adequate rated power to start and
				  continuously operate all connected loads.
C) Fuel Type
Reliability and ease of starting, especially during cold
				  weather conditions, should be considered in the selection of the type of
				  fuel.
D) Engine Ventilation
The engine shall be located above grade with adequate
				  ventilation of fuel vapors and exhaust gases.
E) Routine Start-up
All emergency equipment shall be provided with instructions
				  indicating the need for regular starting and running of such units at full
				  loads.
F) Protection of
				Equipment
Emergency equipment shall be protected from damage at the
				  restoration of regular electrical power.