Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 373 - THIRD STAGE TREATMENT LAGOON EXEMPTIONS
Subpart C - STREAM INFORMATION
Appendix A - Maximum Critical Length
Universal Citation: 35 IL Admin Code ยง A
Current through Register Vol. 48, No. 38, September 20, 2024
The maximum critical length of a receiving stream is the distance (downstream from the wastewater source) required at 7-day 10-year low flow to reestablish an instream BOD5 of 5 mg/l. The amount of time required to reestablish the 5 mg/l BOD5 is termed the critical time of travel. The maximum critical length can be estimated by computing the maximum critical time of travel, which can be approximated using the following equation:
This relationship assumes that BOD5 decays according to ordinary first order reaction kinetics.
Disclaimer: These regulations may not be the most recent version. Illinois may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
This site is protected by reCAPTCHA and the Google
Privacy Policy and
Terms of Service apply.
