Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 905 - PRIVATE SEWAGE DISPOSAL CODE
Section 905.100 - Aerobic Treatment Plants and NSF International/ANSI Standard 40 Wastewater Treatment Systems
Current through Register Vol. 48, No. 12, March 22, 2024
a) General. Aerobic treatment plants and NSF International/ANSI Standard 40 wastewater treatment systems shall be tested and listed by NSF International or a laboratory approved by ANSI and certified compliant with the International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC) Guide 65 to determine compliance with the requirements of NSF International/ANSI Standard 40, Residential Wastewater Treatment Systems. To assure compliance with certification requirements and the Act and this Part, the Department will obtain and retain from NSF International a complete list of approved systems, approved components and approved component parts for each NSF International/ANSI Standard 40 wastewater treatment system installed or currently existing within the State. Until the Department receives the NSF approval information, the system shall not be considered approved in accordance with the Act and this Part. Standard 40 is a standard that covers an organized and coordinated system of components that functions to treat wastewater generated by individual residences. This Part shall allow approved aerobic treatment plants and NSF International/ANSI Standard 40 wastewater treatment systems to serve residential property that is occupied on a year-round or full-time basis. Aerobic treatment plants shall not be used to serve residential property that is used as a seasonal, weekend or part-time residence.
b) Class II Effluent. Aerobic treatment systems listed by NSF International or a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 for Class II effluent shall discharge to one of the following:
c) Class I Effluent. NSF International/ANSI Standard 40 wastewater treatment systems listed by NSF International or a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 for Class I effluent shall discharge to one of the following:
d) Sizing. Aerobic treatment plants that are listed by NSF International or a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 as Class I and rated at 500 gallons per day will be allowed for the treatment of sewage from residential property having up to and including 4 bedrooms. Other aerobic treatment plants that are listed by NSF International or a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 as Class I shall be sized as follows:
Minimum Rated Treatment |
|
Bedrooms |
Capacity-Gallons |
1 |
400 |
2 |
400 |
3 |
500 |
4 |
500 |
5 |
750 |
6 |
900 |
7 |
1000 |
8 |
1200 |
9 |
1350 |
10 |
1500 |
e) Installation. All components of aerobic treatment plants shall be installed at the time of the original installation. If this is not possible, a solid end cap shall be securely placed over the end of the discharge line until the system can be completed. This will prevent the discharge of raw sewage to the ground surface.
f) Accessibility for Inspection and Maintenance. The aerobic treatment plants or NSF International/ANSI Standard 40 wastewater treatment systems shall be equipped with one or more grade-level access manholes having a minimum inside dimension of 18 inches that extend to 3 inches or more above the ground surface. The manhole shall be equipped with a lid that is secured in compliance with Section 5.7.2 of NSF International/ANSI Standard 40. These manholes shall be located to permit periodic physical inspection and maintenance of all compartments and component parts. Component parts include submerged bearings, moving parts, tubes, intakes, slots, filters, and other devices.
g) Service. Devices falling within the scope of NSF International/ANSI Standard 40 require periodic maintenance to achieve performance consistent with demonstrated capabilities. Implicit in NSF International/ANSI Standard 40 is the recognition that assured professional service is imperative. NSF International/ANSI Standard 40 and this Part require a 2-year service policy to be provided as part of the initial service agreement. (Note: The following initial service policy includes items not included in the NSF International/ANSI Standard 40 service policy.)
h) Operation. Aerobic treatment plants and NSF International/ANSI Standard 40 wastewater treatment systems shall produce an effluent meeting the physical, chemical and biological requirements of Section 905.110. Under normal operation and, if an electrical or mechanical failure or other performance failure or malfunction occurs, the design and construction of the aerobic treatment plant or NSF International/ANSI Standard 40 wastewater treatment systems shall prevent the discharge of wastewater from any opening that is not part of the designed flow path of the entire treatment process and shall prevent the discharge of wastewater that is not in compliance with Section 905.110.
i) Maintenance. If a routine service call indicates an electrical, mechanical or performance failure or malfunction or if routine laboratory test results indicate improper treatment, the property owner shall immediately take action to bring the aerobic treatment plant or NSF International/ANSI Standard 40 wastewater treatment systems into compliance with this Part.
j) Non-residential Use. Aerobic treatment plants and NSF International/ANSI Standard 40 wastewater treatment systems that are listed by NSF International or a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 as Class I will be considered for use to serve a non-residential property, provided that all of the following are met:
k) Splitting of Flows. Splitting of flows from a wastewater source or the use of multiple aerobic treatment plants or NSF International/ANSI Standard 40 wastewater treatment systems shall be prohibited unless subsurface disposal of the effluent is used. Where allowed, splitting of flows shall be done by pumps.
l) Private sewage disposal installation contractors or homeowners who maintain or service aerobic treatment plants and NSF International/ANSI Standard 40 wastewater treatment systems shall be required to maintain the integrity of the NSF International seal or the seal of a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40. Only component parts approved for use in an individual plant may be used. No design changes or component part changes may be made that will void the NSF International seal or the seal of a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40. Any person who voids the NSF International seal or the seal of a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 shall be responsible for repairing the plant so it can bear the NSF International seal or the seal of a laboratory approved by ANSI to determine compliance with NSF International/ANSI Standard 40 or shall replace the plant with an approved private sewage disposal system.