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Inflow and Infiltration Reduction Program

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Inflow and Infiltration Reduction Program Grafton Sewer System Update Town of Grafton | Board of Sewer Commissioners | April 2016 | Maintaining Your Sewer System Infiltration and Inflow Reduction The Grafton Sewer System Program Sewage from homes and The Town of Grafton Sewer Department has businesses enters the begun conducting an Inflow and Infiltration sewer system from building Sewers & Pumping inspection program as ordered by the Massa- connections. Sewers and Stations Acadia Blackstone chusetts Department of Environmental Protec- Street Grafton pumping stations transport River tion and the United States EPA. The purpose Pumping Wastewater the wastewater to the Acadia Grafton Homes Station Treatment of this inspection program is to identify those Street pumping station where and Businesses Facility properties in town that have or potentially it is pumped to the Grafton have illegal discharges to the town’s sanitary wastewater treatment facility. The treated wastewater is then discharged into the sewer system. These illegal discharges allow Blackstone River. excessive Infiltration and Inflow (I/I), which is extraneous flow (groundwater and rainwater) that enter the sewer system potentially causing The Importance of I/I Control sanitary sewer overflows (SSOs). Excessive I/I can cause many problems in the sewer system. Although most sewers are designed to carry some I/I, excessive quanti- ties can overwhelm pipes and cause overflow of untreated sewage into the environment and backups onto streets and into private homes. Communities and residents must also pay to pump and treat this clean water once it enters the sewer system. Therefore, any I/I removed from the sewer system will help reduce flows and costs a well as prevent these adverse consequences. Private Inflow Sources Inflow from private sources such as sump A cleaner and safer Blackstone River will benefit recre- pumps and floor/foundation drains have the ation and fishing. greatest impact on the sewer system. During a rain event these sources discharge large from your building lessens the likelihood of volumes of clean water to the sewer and can- water reentering your structure or causing wet quickly overwhelm the capacity of the system, foundation conditions. resulting in overflows to the environment or backups onto the streeta and into homes. It 2. To a dry well or other in ground drainage only takes a few sump pumps to cause major system on your property. sewer infiltration (top left), roof gutter connection (top right), problems into the sewer system. sump pump (bottom left), sewer overflow (bottom right) 3. Nearby storm drainage system. This provides I/I Reduction Actions Needed you with the most reliable discharge location which avoids nuisance conditions on your Sources of Infiltration and InflowInflow WorkSources to be Done to Eliminate/Reduce u Roof Drain Connection property or those adjacent to you. However v SumpInflow Pump w Uncapped Cleanout your site may not allow this option. x FaultyThe Manhole Cover excess inflow entering the sewer system or Frame This work should be completed by a licensed y Root Intrusionthrough Into Lateral improper (illegal/illicit) connections Inflow Sources z Stormcan Cross-Connection only be addressed with your help. If you contractor of your choice. If you have any questions or need assistance with regard to a u u Roof Drain Connection Infiltrationhave Sources an ILLEGAL SUMP PUMP CONNEC- { w v Sump Pump { ConnectedTION Foundation TODrain THE SEWER SYSTEM . Please sump pump or its removal from the sanitary v y | Broken House Lateral sewer system please contact the Grafton Sewer | w Uncapped Cleanout } Faultycontact Lateral Connection the Town of Grafton Sewer Depart- z ~ Cracked or Broken Pipe Department at 508-839-8526. x x Faulty Manhole Cover ment to discuss option to modify the plumbing } Deteriorated Manhole or Frame on your property to permanently redirect your ~ Storm Sewer Sanitary Sewer y Root Intrusion Into Lateral sump pump discharge to an appropriate loca- z Storm Cross-Connection tion outside your house. Please note: your new chosen drainage location should not create a u Inflow Sources Infiltration Sources nuisance condition for your neighbors or FOR MORE INFORMATION { w u Roof Drain Connection { Connected Foundation Drain be in the public right of way. Please contact: v Sump Pump v | Broken House Lateral Options for exterior discharge include: The Town of Grafton, y w Uncapped Cleanout } | Faulty Lateral Connection Board of Sewer Commissioners z x Faulty Manhole Cover ~ Cracked or Broken Pipe 1. To your property, at least 5 feet from x Grafton, MA 01519 } or Frame Deteriorated Manhole the building. Placing the drainage 5 feet y Root Intrusion Into Lateral Phone: 508-839-8526 z Storm Cross-ConnectionStorm Sewer [email protected] Sanitary Sewer ~ u Infiltration Sources { w { Connected Foundation Drain v y | Broken House Lateral | } Faulty Lateral Connection z x ~ Cracked or Broken Pipe } Deteriorated Manhole Storm Sewer Sanitary Sewer ~.
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