20230025_RECOR_MCU Engineers Letter_20.12.24

                                                                            Verification Certificate – SQIDEP VC
                                                                           Reference Number: SA-2021/006/VC

  Technology Information

   Applicant’s            Total Suspended Solids (TSS) 88 %
   Verified               Total Phosphorus (TP)        69 %
   Performance            Total Nitrogen (TN)          67 %
   Claims                 Total Petroleum Hydrocarbons  0%


   Maintenance            Maintenance procedures undertaken during the monitoring period included
   performed              cleaning of the sedimentation chamber once every 12 months. The filter bag
   during                 was also checked once every 12 months but was not replaced.
   monitoring


   Verified               •   The submitted, calibrated MUSIC model provides a method of modelling the
   method to                  technology with 1 Generic node as per the image below, with a bypass
   model in                   flowrate equivalent to 0.5L/s/lin.m of Hydrochannel;
   MUSIC




                          • The input criteria for the node is;
                                  o Generic node
                             High Flow Bypass                                 0.5 L/s/lin.m
                          Total Suspended Solids             Input = 1000 mg/L           Output = 120 mg/L
                            Total Phosphorus                   Input = 5 mg/L            Output = 1.55 mg/L
                              Total Nitrogen                  Input = 50 mg/L            Output = 16.5 mg/L


   Conditions            The limitations of the acceptance of these claims include:
                         • The results are for a road based catchment. The results lie within acceptable
                           inflow limits for this type of catchment and based on the analysis are found to
                           be acceptable. This does not necessarily relate to other catchment types,
                           though it is noted that hard stand catchments will behave similarly. Cleaner,
                           roof catchments may not achieve the same pollutant reduction targets.
                         • The results are for a hydraulic loading rate up to 0.5 L/s per metre module.
                           Should the hydraulic load rate exceed this, the results would be expected to
                           decline in line with excessive loading on the device.
                         • The results are reliant on the maintenance of the device being consistent with
                           the manufacturers guidelines and those that are contained in the report.


© Stormwater Australia 2021                                                                                   2