RFI - C - Site Based Stormwater Management Plan

The dimensions of the proposed infiltration system would use Atlantis Flo-Tank (Matrix Triple Modules) or an
approved equivalent. The dimension of each Atlantis cell used is 408mm wide x 685mm long x 1310mm high
(0.366m3 per cell). Based on a system comprising of 25 modules connected in 5 rows of 5 modules formation,
the results for infiltration are shown in Table 2.



Table 2 – Required Infiltration Tank Size

           Required Volume                  Proposed Tank Properties (25 modules)
                                                                                        Acceptable Capacity
 (Hydrological Effectiveness Method)         Surface Area            Volume

                 5.82m3                        6.987m2               9.15m3                      Yes




It is noted that the proposed tank size well exceeds the required volume. However, based on the suitable space
for installation, this configuration has been adopted. This conservative volume as well as the unknown capacity
of the existing infiltration system that is historically being used, surpasses the requirements for non-worsening
from the site.




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