Illinois Administrative Code

Section 374.206 Pump Vaults All pump vaults shall be equipped with locking covers.

Section 374.207 Marked Sewer Lines Where polyvinyl chloride (PVC) pressure mains are to be installed in the vicinity of similar water supply lines, the sewer line should be clearly marked to prevent possible future cross-connections. (Source: Amended at 21 Ill. Reg. 12439, effect…

Section 374.208 Alarm Systems An alarm system shall be provided in the home where grinder units are installed in the basement to alert the home owner in case of pump malfunction. A visual alarm system shall be provided for those pumping units installed in a separate pumping vault…

Section 375.101 Policy This policy provides guidelines for: a) Determination of water quality impacts attributable to combined sewer overflows and treatment plant bypasses; b) Estimation of potential water quality improvements; c) Selection of a combined sewer overflow (CSO) cont…

Section 375.102 Definitions All definitions in 35 Ill. Adm. Code 301 shall apply here. No incorporation by reference in this Part contains any later amendment or addition. "Combined Sewer" means a sewer designed and constructed to receive both wastewater and land runoff. "Dry Wea…

Section 375.103 Prohibitions a) Dry weather overflows are expressly prohibited under existing regulations and are not eligible for consideration under the provisions of this rule. Combined sewer overflow programs that will result in continued or future dry weather overflows or tr…

Section 375.201 Policy It is the intent of this policy that water quality investigations be no more extensive than is necessary: a) to identify the degree of CSO control appropriate for a specific community as mutually agreed to by discharger and Agency, and b) to substantiate th…

Section 375.202 Phase I – Background Information a) A community seeking to pursue alternate CSO control requirements under provisions of 35 Ill. Adm. Code 306: Subpart D and this Part shall review existing documents including facility planning reports, sewer maintenance records, …

Section 375.203 Phase II – Preliminary Stream Inspection This phase requires a physical inspection of the receiving water body and near stream property. Additionally, any necessary elements missing from the Phase I background report shall be addressed in this step. Factors to be …

Section 375.204 Phase III – Detailed Water Quality Evaluation Areas to be addressed in a detailed water quality survey shall include, consistent with 35 Ill. Adm. Code 306.361(d): a) water column chemistry – 1) upstream/downstream and overflow sampling; 2) wet weather/dry weather…

Section 375.205 Special Analysis for Congested Areas In small drainage basins receiving combined sewer overflows from collection systems belonging to several separate governing bodies the significance of the aggregate CSO load may well dictate a basin wide evaluation of alternate…

Section 375.206 Time Schedule a) Once a water quality investigation is initiated, every effort shall be made to expedite each step of the activity, completing the investigation in the shortest possible time without compromising the validity of the findings. Effective field activi…

Section 375.301 Water Quality Evaluation It is intended that water quality evaluation performed under Subpart C of this Part will be undertaken in conjunction with or subsequent to first flush analysis and CSO studies consistent with Subpart D. Control options being evaluated sha…

Section 375.302 Control Alternatives Alternatives resulting in noncompliance with existing water quality standards and requiring regulatory relaxation of water quality standards may also be considered by the discharger. Water quality revisions being considered shall be consistent…

Section 375.303 Benefits Assessment Benefits shall not be assessed solely on a pound pollutant removed basis but also on instream improvement of a documented pollutional impact or reduction in a public health risk. Acceptable techniques for estimating water quality improvements w…

Section 375.401 Variables in First Flush Determination The intensity and duration of first flush are a function of certain variables including: a) Physical and hydraulic features of the sewer system and tributary watershed. b) Amount of sediment accumulated in the sewer system an…

Section 375.402 Conditions for Determination For any given sewer system, or portion of a sewer system, first flush volume subject to full treatment requirements of 35 Ill. Adm. Code 306.305(a) and associated flow rate shall be determined for the following condition(s): a) A storm…

Section 375.403 Field Studies a) First flush volumes may be determined through direct field measurement at a point of overflow, modeling of the collection system or equally accurate techniques. Either approach is dependent on a field monitoring program as described in (c) below. …

Section 375.404 Modeling a) If all of the overflow locations to be studied cannot be sampled and monitored, or field conditions were not available through direct field measurement as described in Section 375.403, then other methods, including modeling of section(s) of the study a…

Section 375.APPENDIX A First Flush Graph (Source: Added at 8 Ill. Reg. 19436, effective September 26, 1984)

Section 378.101 Purpose, Scope and Applicability a) The purpose of this Part is to establish requirements for determining which National Pollutant Discharge Elimination System (NPDES) permit dischargers may cease effluent disinfection on a seasonal or year-round basis pursuant to…

Section 378.102 Definitions All terms shall have the meanings set forth in the Environmental Protection Act except, for purposes of this Part, the following definitions apply: "Act" means the Environmental Protection Act (Ill. Rev. Stat. 1987, ch. 111½, pars. 1001 et seq., as ame…

Section 378.103 Application Requirements The Agency will consider an exemption from the fecal coliform effluent limitations of 35 Ill. Adm. Code 304.121(a) only when the holder of an NPDES permit submits to the Agency a Disinfection Exemption Request. The request, at a minimum, s…

Section 378.201 Year-Round Protected Waters Waters utilized for public and food processing water supply must comply with the 2000 per 100 ml fecal coliform standard of 35 Ill. Adm. Code 302.306 at any intake point on a year-round basis.

Section 378.202 Seasonally Protected Waters Waters within the following categories must comply with the 200 per 100 ml fecal coliform standard of 35 Ill. Adm. Code 302.209(a) during the months of May through October: a) All large streams and rivers which support primary contact a…

Section 378.203 Unprotected Waters Unprotected waters are not required to comply with the fecal coliform standards of 35 Ill. Adm. Code 302.209 and 302.306. Characteristics of unprotected waters include but are not limited to the following, and waters must possess one or more of …

Section 378.204 Assessment of Waters for Protected Status a) The permittee shall conduct surveys necessary to determine whether affected waters currently support or have the potential to support primary contact activities. The permittee shall determine and document the following:…

Section 378.301 Die-off Equation a) The permittee shall model the die-off of fecal coliform from its discharge using the first-order die-off equation provided in Appendix A of this Part. Appendix B of this Part provides step-by-step guidance for the application of this equation. …

Section 378.302 Cumulative Effects of Multiple Sources a) When modeling fecal coliform die-off, the permittee must account for contributions of additional downstream sources. Requests for exemption will be denied when die-off modeling indicates that the combined effect of multipl…

Section 378.APPENDIX B Application of the Die-off Equation a) Sketch the receiving stream and the progression of higher order streams it flows into, up to and including the major river basin. Major river basins are listed in Appendix C. Also identify on your sketch: 1) Smaller st…

Section 380.100 Purpose a) These rules set forth requirements and procedures applicable to wastewater treatment works to ensure the treatment works is supervised by a wastewater operator certified under this Part. b) These rules contain the procedures and classifications necessar…

Section 380.1000 General a) When the owner of a wastewater treatment or pretreatment works satisfies the Chief Wastewater Operator requirements of Subpart B by contracting the services of the certified operator, the owner of a wastewater treatment works or pretreatment works shal…

Section 380.1005 Contract Provisions When the owner of a wastewater treatment or pretreatment works satisfies the Chief Wastewater Operator requirements of Subpart B by contracting the services of a certified operator, the contract between the owner and the contract operator must…

Section 380.1010 Non-party Operators (Repealed) (Source: Repealed at 43 Ill. Reg. 5203, effective July 1, 2019)

Section 380.1015 Documentation of Contract Provisions The contract operator must maintain records to document that all contract provisions are being met and continue to maintain the records for 5 years following generation of the data. The contract operator's records must be made…

Section 380.1020 Contract Approval a) The Agency will approve a contractual agreement when the contractual operator is certified pursuant to this Part, and the provisions of Sections 380.1000, 380.1005 and 380.1015 are satisfied. b) The Agency will withdraw an approval when it is…

Section 380.1025 Contract Modifications and Extensions Modifications or extensions to contractual agreements must be submitted to the Agency as a new contract. (Source: Section 380.906 renumbered from Section 380.904 at 9 Ill. Reg. 2663, effective February 15, 1985; recodified fr…

Section 380.105 Definitions "Activated Sludge" means sludge floc produced in raw or settled wastewater by the growth of zoogleal bacteria and other organisms in the presence of dissolved oxygen and accumulated in sufficient concentration by returning floc previously formed; "Act"…

Section 380.110 Definitions from Other Parts Unless otherwise specified in Section 380.105, all definitions found in the Act and 35 Ill. Adm. Code: Subtitle C, Chapter I shall apply to this Part. (Source: Amended at 43 Ill. Reg. 5203, effective July 1, 2019)

Section 380.115 Facility Groups a) Domestic and industrial wastewater treatment works and pretreatment works shall be grouped as follows: 1) All publicly owned treatment works and domestic wastewater treatment works not owned by an industry shall be grouped as follows: A) Group 1…

Section 380.120 Certification Classification a) The Agency may issue a Certificate of Technical Competency for each facility group identified in Section 380.115. 1) A Class 1 Certificate of Technical Competency corresponds to a Group 1 facility. 2) A Class 2 Certificate of Techni…

Section 380.125 Prior Certifications A Class 7 Industrial Certificate issued prior to February 15, 1985, shall be the equivalent to a Class K Certificate and shall expire on July 1, 2022. (Source: Added at 43 Ill. Reg. 5203, effective July 1, 2019) SUBPART B: CHIEF WASTEWATER OPE…

Section 380.200 Required Supervision All portions of a wastewater treatment or pretreatment works for which a permit is required by 35 Ill. Adm. Code 309 shall be under the direct supervision of a Chief Wastewater Operator. The Chief Wastewater Operator shall hold a Certificate o…

Section 380.205 Chief Wastewater Operator Requirement a) Except as provided in Section 380.210, every wastewater treatment or pretreatment works for which a permit is required by 35 Ill. Adm. Code 309 shall have on its operational staff and shall designate to the Agency in writin…

Section 380.210 Exceptions a) A wastewater treatment works is not required to have a Chief Wastewater Operator on its operational staff if the wastewater treatment works is operated as part of a public water supply, treats waste generated only by that supply, and has designated a…

Section 380.215 Agency Notification a) The owner and the Chief Wastewater Operator must file a signed statement identifying the Chief Wastewater Operator on forms provided by the Agency. b) Whenever a Chief Wastewater Operator begins or ceases employment with a wastewater treatme…

Section 380.300 Purpose A Board of Certification will advise the Agency on certification actions. (Recodified from Section 380.301 to Section 380.300 at 31 Ill. Reg. 10532)