20230025_RECOR_MCU Engineers Letter_20.12.24

                                Figure 3 - Atlan Basin – Treatment Train Effectiveness

            Atlan Hydrochannel

            The Hydrochannel is an insert that can be placed inside a channel grated drain of 300mm
            wide, and at least 450mm deep. It is designed for areas that would benefit from at source
            stormwater treatment, which would otherwise be bypassed. This allows stormwater from
            high traffic areas (car parks and roads), industrial areas and metal roofs to be cleaned at site
            level, and then discharged locally.

            The Atlan Hydrochannel is a SQIDEP certified device having treatment efficiency as shown
            in Table 2.

                                           Table 2- Tested Treatment Efficiencies

              Pollutant                                            Efficiency (%)

              Total Suspended Solids (kg/yr)                       88

              Total Phosphorus (kg/yr)                             69

              Total Nitrogen (kg/yr)                               67

              Gross Pollutants (kg/yr)                             100



            The hydrochannel is proposed to capture and treat runoff from the driveway area. A surface
            solution is required in this location due to limited cover and depth to invert of existing
            downstream drainage pipes.




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