RFI - Attachment 3 - Stormwater Management Plan

6.2 Laboratory Testing Collection Efficiency Sigmoidal
Regression Lines

In 1996, the University of South Australia tested the Ecosol™ Litter Basket. These
tests measured the capture efficiencies of the unit in both on-grade and sag situations
for a range of flows containing full-size, real-life solid pollutants. In 2012 the
University of Adelaide (Engtest Civil, Environmental and Mining) completed further
measurements of the products capture efficiency at varying flow rates and compiled
comprehensive product performance report (Performance Review of the Ecosol™
Litter Basket) reviewing both past and present field and laboratory testing data.
The below graphs summarise this data.


                                                        100%


                                                        80%
                            Collection efficiency (%)




                                                        60%


                                                        40%


                                                        20%


                                                        0%
                                                               2      4       8       16      32       64       128      256     512     1024   2048   4096

                                                                                                   Particle size (microns)



                                                                   Figure 1 - Sigmoidal regression line for the Ecosol™ Litter Basket, with a 200 micron
                                                                   filtration bag indicating high capture efficiencies for a range of particle sizes.




                                                                                                                                 URBAN            ®

                                                                                                                               ASSET SOLUTIONS
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