Attachment 4 - Stormwater Managment Plan

SQIDEP Evaluation                                                SPEL Basin, Sippy Downs


Performance         Performance Requirement                                                Monitoring action or result            Compliance or
Criteria                                                                                                                          non
                                                                                                                                  compliance

Performance         The target pollutants and testing rationale must be described in the   QAPP was not submitted as part         Compliance.
Indicators          QAPP and Detailed Performance Report.                                  of the application.

                                                                                           Claiming TSS, TP and TN and
                                                                                           Gross Pollutant reductions. TSS,
                                                                                           TP and TN were measured. The
                                                                                           initial claim included
                                                                                           hydrocarbons by inference
                                                                                           however these were not tested
                                                                                           and it was agreed to remove
                                                                                           these from the claim.

                                                                                           Gross pollutants were not
                                                                                           specifically measured however it
                                                                                           is considered that gross pollutants
                                                                                           are solids with a particle size
                                                                                           greater than 3mm and which
                                                                                           could not physically flow through
                                                                                           the device. It is noted that a
                                                                                           floatable gross pollutant may
                                                                                           become buoyant and flow out of
                                                                                           the system during extreme high
                                                                                           flow bypass events. However the
                                                                                           gross pollutant claim is
                                                                                           considered justifiable on the basis
                                                                                           of the nature of the device which
                                                                                           includes a littler basket and filter

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