Illinois Administrative Code

Section 371.267 Chapter VII − Emergency Operating and Response Program a) Analyze the pumping station's and collection system's vulnerability to emergency situations including: 1) Equipment failures 2) Natural disasters 3) Strikes 4) Civil disorders b) Discuss methods to reduce v…

Section 371.268 Chapter VIII − Safety a) Discuss management's safety responsibilities including legal ramifications upon failure to provide a safe work environment. b) Discuss any unusual safety considerations including any hazards which are due to unique conditions at the projec…

Section 371.269 Chapter IX − Utilities a) Give the name, address and telephone number of the electrical power company. If possible, identify contact persons and telephone numbers for routine and emergency contact. b) For additional information on the electrical system, cross refe…

Section 371.270 Chapter X − Electrical System a) Discuss the characteristics of the primary electrical distribution line. b) Discuss the system's protective devices such as: 1) Fuses 2) Circuit breakers 3) Ground fault interruption c) Describe all motor control centers and panels…

Section 371.271 Appendices a) Schematics b) Valve Indexes c) Copies of all forms needed to operate the pumping stations and collection system efficiently d) Chemicals used in the system and the names and addresses of the suppliers e) Design criteria for the project in tabular for…

Section 371.280 Other Items Available at Municipal Wastewater Pumping Stations and Collection Systems In addition to the O&M Manual, the following items must be available at the facility: a) Warranties for all equipment b) Construction photos, if applicable c) Approved shop drawi…

Section 371.300 Submission of Operation and Maintenance Manuals a) A draft O&M Manual must be submitted to the Agency for review. The draft should be as complete as possible considering available information. Outlines of O&M Manuals will not be approved as draft manuals. b) Draft…

Section 371.APPENDIX A Old Section Numbers Referenced The following table is provided to aid in referencing old Agency section numbers to new section numbers pursuant to codification. Old Section Numbers 35 Ill. Adm. Code Part 371 101 371.101 102 371.102 103 371.103 201 371.120 2…

Section 372.100 Purpose The purpose of this Part is to establish design standards and permit application requirements for wastewater treatment systems involving the non-discharging low-rate application of wastewater to land.

Section 372.110 Scope and Applicability a) These design standards apply to non-discharging low-rate land application of secondary and tertiary treated domestic wastewater to land upon which crops, turf or trees are grown. These design standards are to be used in the preparation o…

Section 372.200 General The preliminary engineering report required under subsection 372.110(b) shall address all of the elements contained in this Subpart B, as well as any of the planning elements of Subparts C through E that are applicable to the feasibility of the project for…

Section 372.210 Site Location a) General The following factors shall be considered in the selection of the site: 1) Present and proposed land use regarding residences, buildings, developments, public access areas, for the site and adjoining properties; 2) Present and proposed wat…

Section 372.220 Hydrogeology and Soils a) General The engineering documents shall contain information on location, geology, groundwater, soil characteristics, ground slopes, area for expansion, and any other factors that will affect the feasibility and acceptability of the propos…

Section 372.230 Buffer Zone a) Non-Spray Surface Application For non-spray surface application of treated wastewater using gated pipes, subsurface irrigation, or equivalent methods, the area wetted by the treated wastewater shall not encroach on any wetlands, streams, waterways, …

Section 372.240 Loading Factors on Application Fields a) General The size of the application area shall be based on the limiting characteristic of the treated wastewater and the site. Balances shall be calculated and submitted for water, nitrogen, phosphorus, and 5 Day Biochemica…

Section 372.250 Project Layout A single topographic map of the proposed project and the area within 2,500 ft. of the project shall be submitted as a part of the engineering design. Segmented maps may be provided for large projects. The topographic map shall show the following inf…

Section 372.300 Equipment Design a) General Requirements 1) The design of all application systems shall provide facilities to assure uniform distribution of the treated wastewater over the disposal area. 2) Sufficient spare equipment and parts shall be available to assure continu…

Section 372.310 Runoff Control The design shall provide for control of the application intensity to prevent runoff in response to treated wastewater application on all parts of the application field. In order to minimize runoff during precipitation events, the exclusion of runon …

Section 372.320 Application Area Access Control The entire application area and buffer area shall be posted at 100 yard intervals around the perimeter identifying the area as a "Treated Wastewater Application Area". The application area shall be fenced to prevent access by childr…

Section 372.400 Degree of Treatment Required Relative to Application Area a) Agricultural Areas Agricultural or forested areas that do not have public access shall provide at a minimum a two cell lagoon system or a mechanical secondary treatment facility. b) Urban Areas Urban par…

Section 372.410 Preapplication Treatment Plant Design a) Design and Construction Requirements All preapplication treatment systems shall be designed and constructed in accordance with 35 Ill. Adm. Code 370, Illinois Recommended Standards for Sewage Works. b) Screening All treatme…

Section 372.420 Storage a) Storage Volume All land application systems must provide adequate storage, with adequacy being determined using either of the following methods, except that those facilities that do not generate wastewater year round must use Method I: 1) Method I Adequ…

Section 372.430 Treatment and Storage Area Access Control The entire treatment and storage lagoon area shall be enclosed with fencing to preclude livestock and prevent access by the general public. Warning signs shall be posted at 100-yard intervals on exterior fences designating…

Section 372.500 Groundwater Monitoring a) General 1) Saturated zone groundwater monitoring shall be provided for all land application systems. A minimum of three groundwater monitoring wells must be provided, one upgradient for determining background concentrations and two downgr…

Section 372.510 System Flow and Stored Volume Measurement a) System Flows Plant influent and effluent irrigation flow measurement shall be provided. Flow measurement shall not be less than elapsed time meters used in conjunction with pumping rate tests or calibrated weirs. All fl…

Section 373.101 Purpose This Part describes information required in an application for lagoon exemption effluent limitations allowed by 35 Ill. Adm. Code 304.120(a) and (c). An approved lagoon exemption is required before the appropriate limitations can be specified in a National…

Section 373.102 Definition of a Third Stage Treatment Lagoon Facility A third-stage treatment lagoon is defined as a waste treatment facility employing an aerated or nonaerated waste stabilization lagoon alone or in conjunction with one or more additional treatment units in which…

Section 373.103 Eligibility In accordance with the requirements of 35 Ill. Adm. Code 304.120(a) and (c), third stage treatment lagoon facilities must, in order to be eligible for consideration for a lagoon exemption, be properly constructed pursuant to 35 Ill. Adm. Code 370, and …

Section 373.201 Application Requirement In order to have the effluent limits stated in 35 Ill. Adm. Code 304.120(a) and (c) included in an NPDES permit, the discharger shall submit a written application to the Agency containing the information required by this Part. The applicati…

Section 373.202 Facility Description The application shall describe the facility including, at a minimum: a) location, b) design and operating data, c) untreated waste load and effluent quality, d) construction permit and NPDES permit information, and e) useful life of the facili…

Section 373.203 Population Equivalent Requirements a) If applying per Section 373.103(a), the applicant shall show that the facility is presently receiving an untreated organic waste load of less than 2,500 P.E. b) If applying per Section 373.103(b) or (c), the applicant shall sh…

Section 373.204 Sufficient Isolation Requirements The applicant shall show that the facility is sufficiently isolated so that combining with other sources to aggregate 2,500 P.E. or more if applying per Section 373.103(a), or more than 5,000 P.E. if applying per Section 373.103(b…

Section 373.205 Useful Life Applicants wishing to qualify for an exemption under Section 373.103(c) must complete a Useful Life evaluation. This evaluation must demonstrate that the existing facility has exceeded its useful life. Useful life is considered to be the time span over…

Section 373.301 Critical Length The applicant shall provide information about the stream to which the facility discharges. This information shall describe the stream for its critical length as determined by the procedure outlined in Appendix A.

Section 373.302 Stream Description The applicant shall provide the following information at a minimum: a) The name of the receiving stream and the progression of higher order streams it flows into, up to and including the major river basin; b) The location of the point of dischar…

Section 373.303 Smaller Facilities a) Facilities which meet the following conditions need not perform the analysis required by Section 373.304: 1) The facility must be designed for a waste load less than 750 P.E., and 2) The critical length of stream below the discharge is not su…

Section 373.304 Stream Assimilative Capacity a) Unless conditions as described in Appendix D indicate otherwise, the applicant shall use the Modified Streeter-Phelps Equation contained in Appendix B to predict the influence of the treated wastewater discharge on the dissolved oxy…

Section 373.305 Model Limitations If the limiting factors described in Appendix D are present in the stream, the exemption shall be denied.

Section 373.APPENDIX B Modified Streeter-Phelps Equation The Modified Streeter-Phelps Equation mathematically defines the relationship between carbonaceous oxygen demand, nitrogenous oxygen demand, natural stream reaeration and the dissolved oxygen deficit as a function of time: …

Section 374.101 Introduction These design criteria are to be used by the Illinois Environmental Protection Agency in reviewing 35 Ill. Adm. Code 309, Subpart B permit applications for pressure sewer systems including grinder pump systems and septic tank effluent pumping (STEP) sy…

Section 374.102 Conventional System Preference If possible, the development proposed shall be served by a conventional sewer system. A conventional sewer system is defined as gravity sewers or a conventionally designed pumping station. (Source: Amended at 21 Ill. Reg. 12439, effe…

Section 374.103 System Pressure Maintenance The owner or operator of a pressure sewer system shall provide a method of inspection or authorization to assure that users of the system maintain the original design operating pressures of the system when repairing, modifying or replac…

Section 374.104 Sludge Disposal Permits for STEP systems shall not be issued unless the applicant provides satisfactory evidence that adequate facilities are available for the pumping and disposal of septic tank sludge. (Source: Section 374.104 repealed and new Section 374.104 re…

Section 374.105 Sludge Disposal (Renumbered) (Source: Section 374.105 renumbered to Section 374.104 at 21 Ill. Reg. 12439, effective August 28, 1997)

Section 374.106 Pressure System Failure (Repealed) (Source: Repealed at 21 Ill. Reg. 12439, effective August 28, 1997) SUBPART B: DESIGN CRITERIA

Section 374.201 Duplex Pumps If grinder pumps are serving more than one building, duplex pumping units shall be required. If the pumps are to be installed for individual buildings, a single pumping unit may be used. (Source: Amended at 21 Ill. Reg. 12439, effective August 28, 199…

Section 374.202 Minimum Size The grinder pump "wet well" should have a minimum size of 150 gallons.