manhole test Articles

  • Whittier in Frederick, Maryland - Storm Water Treatment Underground Systems Meet Regulatory Requirements

    The Assisted Living Project at Whittier in Frederick, M.D. is a 6.3 acre retirement community situated next to Whittier Lake. Planned by Fox & Associates, it included special design considerations for a cost-effective and attractive means of treating stormwater. To detail the Whittier site, it is comprised of a retirement assisted living facility which is 19,151 sq. ft., a retirement medical ...


    By BaySaver Technologies, Inc.

  • Performance of sanitary sewer collection system odour control devices operating in diverse conditions

    Controlling odours from sanitary sewer systems is challenging as a result of the expansive nature of these systems. Addition of oxidizing chemicals is often practiced as a mitigation strategy. One alternative is to remove odorous compounds in the gases vented from manholes using adsorptive media. In this study, odour control devices located at manholes were observed to determine the ability of ...


    By IWA Publishing

  • A no-brainer for drains

    Pre-fabricated drainage products have saved time and boosted safety on a Welsh road scheme Surface water drainage is not the most visible element of a new road scheme – after all, it’s almost entirely underground. But it is vitally important to any road and it’s one of the first priorities before work starts on the carriageway. At Costain’s £59 ...


    By Kijlstra LTD.

  • Modeling overland flows in InfoWorks CS

    A new tool within InfoWorks CS v7.5 enables the presentation of flood depths within the bounds of a polygon, otherwise known as a flood compartment. The flood level can be extended throughout the boundaries of the compartment, allowing it to be matched against a ground model to calculate flood depth. The new tool does not alter the way in which flood calculations are undertaken, it is instead a ...


    By Innovyze

  • Hydrogen sulfide gas emission under turbulent conditions – an experimental approach for free-fall drops

    Odor nuisance and sulfide corrosion in sewers carrying septic wastewater are accelerated at points of turbulence such as drops in manholes, but accurate methods or empirical expressions to evaluate the gas stripping rate at those particular sites are still missing. With the aim of improving the current knowledge on the influence of free-fall drops on the release of hydrogen sulfide gas, an ...


    By IWA Publishing

  • Klargester Cesspools provide a reliable, economic and efficient solution to your sewage disposal needs

    Klargester Cesspool provides a reliable solution for locations without mains drainage, where the discharge of treated effluent is not permissible due to unsuitable ground conditions, or where infrequent or seasonal use, such as a holiday home, would prevent the successful functioning of a BioDisc/AirFlow packaged treatment plant, for example. Quality and reliability at a competitive ...


    By Kingspan Environmental Ltd

  • Rapid detection of sewer defects and blockages using acoustic-based instrumentation

    Sewer flooding incidents in the UK are being increasingly associated with the presence of blockages. Blockages are difficult to deal with as although there are locations where they are more likely to occur, they do occur intermittently. In order to manage sewer blockage pro-actively sewer managers need to be able to identify the location of blockages promptly. Traditional closed-circuit ...


    By IWA Publishing

  • Perma-Shield PL: Advanced Protection for Ductile Iron and Steel Pipe

    Tnemec Company’s innovative Perma-Shield ceramic epoxy lining technology is now available for steel and ductile iron pipe and fittings.  Specifically formulated and tested to withstand severe wastewater environments, Perma-Shield has protected millions of square feet in wastewater collection and treatment plants including manholes, lift stations, ...


  • LIT25 level indicating transmitter controls swimming pool level

    The Town of Okotoks, Alberta I never gave it much thought, but what happens to the displaced water when a hundred people jump into a large public swimming pool? It goes into a surge tank - of course. This Greyline LIT25 Level Indicating Transmitter with ultrasonic sensor is installed in the basement of the Okotoks Recreation Centre in Alberta, Canada. The LIT's 4-20mA output is connected to a ...


    By Greyline Instruments Inc.

  • SMF4 case study 2

    Sewer Misconnection Survey Date: March 2010 Location: Edgebaston Birmingham UK Purpose: To test the application of the SMF4 portable fluorimeter in the detection and quantification of organic pollution from faecal matter in Surface water Sewers. Background STS was invited independently by the Environment Agency and Severn ...


    By Safe Training Systems Ltd

  • Assessment and improvement planning for the Rochdale South sewerage system

    Rochdale South is a predominantly residential suburb south of the Queensland capital city of Brisbane. It has a total population of 10,680 and a sewerage system catchment area of 580ha. The sewerage system includes five pumping stations which forward sewage flows to a downstream treatment plant. Rochdale South comes under the jurisdiction of Logan City Council, and Logan Water is the body that ...


    By Innovyze

  • Using InfoNet to build InfoWorks CS hydraulic models

    Water utilities are now using MWH Soft’s InfoNet database and network management solution to monitor data, which has in turn enabled digital models of these networks to be created in a more efficient way. Many countries are still developing modeling standards, and management tools are either basic or non-existent, so these challenges have to be faced when building models to ensure they are ...


    By Innovyze

  • Installing gravity sewer in tough Georgia rock

    It took a contractor who was receptive to an innovative new installation approach, a good deal of patience and a whole lot of determination — after two previous attempts by other contractors using drills and air hammers were unsuccessful — to finally conquer a pesky 800-foot (243.8 m) stretch of tough Georgia blue granite. Hence, project owner Coweta County Water and Sewer Authority ...


    By Vermeer

  • Quantifying Sub-Surface Discharges from Individual Sewer Defects

    ABSTRACTThe California Regional Water Quality Control Board, Santa Ana Region (RWQCB) required wastewater collection agencies in Orange County to report discharges from “pipe breaks, leaking sewer pipes and joints, and other subsurface discharges of wastewater.” The Orange County Sanitation District (OCSD), in conjunction with a research team from University of California, Irvine (UCI), developed ...

  • Gully and overland modeling during extreme events

    Consultants JBA have been involved in modeling gully and overland flows during extreme events as part of the Interreg IIIB NWE (North West Europe) ’urban water’ project, which is being undertaken by Renfrewshire Council in Scotland. Research for this project was commissioned following flooding in 1994 and 1999. The project takes a strategic look at urban flood risk management on a large scale, ...


    By Innovyze

  • Misconnections – Birmingham UK case study

    Background STS was invited independently by the Environment Agency and Severn Trent water to carry out a series of monitoring operations in an area which had a history of issues arising from the misconnection of waste water into a “clean” surface water sewer system. Traditionally surveys of this type are carried out using contractors who are tasked to lift manhole covers ...


    By Safe Training Systems Ltd

  • Good bugs and bad bugs

    Ugh, what IS that smell? is usually a question for which no one really wants an answer! The real reason is to make sure the person asking this rhetorical question is not the originator. Anyone walking by some City sewer manholes has had this experience.Beneath the streets of San Diego are literally hundreds of miles of pipes carrying human waste (sewage) from homes and businesses to sewage ...


    By Hydrologix Systems LLC

  • Pittsburgh builds its CSO planning program around InfoNet

    When the Pittsburgh Water and Sewer Authority (PWSA) in Pittsburgh, PA commissioned Metcalf and Eddy and the Michael Baker Corporation to develop a long-term plan for ...


    By Innovyze

  • BaSYS 8.0.2 – The Swiss pocket knife for handling sewer or fresh water networks

    An efficient and sustained management of sewer or fresh water systems is a significant task. Any problems with these systems can mean tremendous financial risk for owners and operators of these systems. Such problems can also present large environmental risks. To mitigate such risks a comprehensive application software is needed that can maintain such sewer and fresh water networks. Barthauer ...


    By Barthauer Software GmbH

  • Emergency response and clean-up of a diesel leak: manufacturing facility

    Project: Emergency response and clean-up of a diesel leak Client: Confidential manufacturing company Services: Emergency response planning, environmental assessment, regulator liaison, remediation design Summary: Through rapid site characterisation and expert decision making ESI minimised the environmental damage ...

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