Thursday, March 30, 2023 at 2:00 p.m.

Session #6: What’s in your Lagoon? Find out with a Sludge Survey


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or Send an email to to schedule access.
FREE to members.
Fee for non-members $30+HST.


Think you have a sludge problem? You’re not alone. Environment and Climate Change Canada reported that in 2017, 26% of treated effluent discharged in Canada failed to meet effluent quality limits (an estimated 1.5 billion m3). Many municipalities are struggling to meet their effluent quality limits and turn to dredging/desludging and bioaugmentation to restore their lagoon system. They begin these capital-intensive projects with very little data to help them plan, budget and develop a quality management strategy to execute a successful desludging or bioaugmentation project. A single comprehensive sludge survey can reduce dredging costs by up to 75%.


At the completion of this one-hour OJT session, participants will be able to demonstrate the following:

                    • A general overview of comprehensive sludge survey methodology and importance of 3rd party sludge surveys.
                    • How to use the data obtained in a comprehensive sludge survey to plan and budget for a lagoon or pond dredging project.
                    • How a sludge survey can significantly reduce dredging costs.
                    • The importance of dry tonnes as a measure of dredge contractor performance.
                    • How to use the data obtained from a sludge survey to monitor sludge accumulation or dredging progress and verify dredge project completion.
                    • How to use the data obtained in a comprehensive sludge survey to assess bioaugmentation product performance.
                    • Additional sludge survey use cases.


    Andrew Ambrocichuk

    Our facilitator is Andrew Ambrocichuk, the founder and CEO of Hydrasurvey Ltd., Canada’s leader in lagoon and pond sludge surveys and dredge project quality management. Andrew has been conducting sludge surveys on wastewater lagoons and ponds in Canada for almost a decade and during this time he learned that collecting accurate sludge blanket data is critical to successfully managing a wastewater lagoon or pond. Andrew founded Hydrasurvey in 2017 based on an industry-wide need for professional, 3rd party lagoon and pond sludge surveys to provide municipalities, wastewater engineering consultants and dredge contractors with the proper data to plan, budget and execute lagoon dredging and treatment infrastructure upgrade projects.  



    These 1-hour virtual sessions are offered every alternate Thursday starting at 2:00 pm.  Sessions are complimentary to all OMWA members and the fee for non-members is $30.00 CAD plus HST per person per session.  

    If you have any specific questions regarding this OJT session, please feel free to submit them when you register and we will provide them to the workshop facilitator.   

    The OMWA will provide a certificate recognizing participation in these On the Job Training sessions.
    Attendance may also qualify as a Continuing Knowledge Activity for the PEO PEAK program

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