Search results with tag "Combined sewer"
Design Criteria for Sewers and Watermains
www.toronto.casewer design requirements, maintenance holes, service connections, connecting to sanitary sewers, and inverted syphons. Chapter 3 – Storm Sewers – covers choosing a hydraulic model, evaluating the receiving system capacity, levels of protection in storm and combined sewer areas, design storms, requirements for the minor
G2238 Stormwater Management: What Stormwater …
extensionpublications.unl.eduoverflow. Bioretention gardens ... flow (sewage and stormwater) in a combined sewer is treated at a wastewater treatment plant. When it rains, a combined sewer system is often overwhelmed by large volumes of stormwater, and the combined sewage and stormwater overflows into a
Criteria for Detention Facility Design - New York City
www1.nyc.gova sewer, Q DRR, will depend on whether the connection is to a combined sewer or to a separate storm sewer, the number of connections proposed, if any stormwater flow will be discharged unrestricted, if any constant and continuous stormwater recycling and reuse is proposed, or if any infiltration credit is proposed.
Site Connection Proposal Application ... - City of New York
www1.nyc.govgreater than 0.25 cfs, the release rate to the combined sewer must be restricted to 10% of the allowable flow or 0.25 cfs, whichever is greater. 3. Show the number, type (sanitary, storm, combined), and diameter of each connection requested and the total Q for sanitary, storm, and combined flow separately. In those situations where
Glossary of Wastewater Terms
www.mgsdistrict.orgCombined Sewer Overflow (CSO) When a combined sewer system is overpowered by storm drainage and overflows. Constructed Wetland . An artificially created wetland usually with a waterproof lining for wastewater purification. Detention, flow rates, types of plants and other parameters are controlled to improve BOD, SS ...
Guidelines for the Design and Construction of Stormwater ...
www1.nyc.gov§ 31-03 Stormwater performance standard for connections to combined sewer system: For a New Development: – Stormwater Release Rate will be the greater of 0.25 cfs or 10% of the Allowable Flow – If Allowable Flow is less than 0.25 cfs, the Stormwater Release Rate shall be the Allowable Flow
Combined Sewer Overflow Management Fact Sheet: Sewer ...
www3.epa.govCombined Sewer Overflow Management Fact Sheet Sewer Separation DESCRIPTION Sewer systems that convey both sanitary sewage and storm water through a single pipe are referred to as combined sewer systems (CSSs). In dry weather and during light to moderate rainfall, the CSS is able to convey all flows to the wastewater treatment facility.