MCU14/0056 Response to SARA - Consulting Report

                                                                                                              ENG
                                                  Engineering Report & Stormwater Management Plan
                                          Date:          27/01/2015     Document No.:     14012-ENG-04.Docx

                                           By:              AvT          Revision No.:              F


     •    Drainage separation options may include grading, bunding, kerbing and/or
          channelling.
     •    Bulk fuel transfers shall be carried out in a defined Tanker Delivery Standing Area. This
          area shall normally be drained to the uncovered area stormwater treatment system.
          However, during fuel delivery operations, automatic diversion valves shall be used to
          divert such drainage to the under-canopy containment vessel. The Tanker Delivery
          Standing Area in uncovered locations shall be sized so that the drainage area has a
          radius of at least 3 meters and a storage volume equivalent to that of the largest
          tanker storage compartment that is expected on site at any given time
     •    Signs indicating fate of flow such as “flows to creek” shall be provided in locations
          around the uncovered area.

     Service Station Treatment
The fuel dispensing areas shall be graded to a suitable underground containment and
treatment vessel (i.e. sump/tank) compatible with petroleum products and other likely
chemicals. It is proposed that a SPEL Puraceptor containment system be installed to capture
and retain flows from the fuel dispensing areas.

The SPEL Puraceptor (model P.040.C1.2C) is a 6 minute full retention tank that will hold and
treat all the stormwater runoff from the associated forecourt area catchment area of 538m2.
Based on a rainfall duration of 5 minutes and a rainfall intensity of 245 mm/hr for 20 ARI the
associated runoff is approximately 37l/s. The proposed SPEL Puraceptor P.040.C1.2C can treat
up to 40l/s, therefore it is considered to be suitable for this application.

The SPEL Puraceptor P.040.C1.2C has a spill containment capacity of 9000l which is sufficient
to hold the contents of a fuel tanker in case of an emergency spill.

Refer to Appendix F for the “SPEL Risk Assessment Report for Proposed Service Station
Located at Corner Myall Street & Ferrells Road, Cooroy, QLD” which provides details on the
proposed system and also the stormwater quality treatment provided by the system.

Refer to Appendix F for the “SPEL Puraceptor Operations and Maintenance Manual”.

     Alternative Service Station Treatment
Should the SPEL Puraceptor with the accompanying report in Appendix F not be acceptable to
council, then the runoff from the refuelling areas will be directed to a blind sump holding tank
that is not connected to the stormwater system or the sewer system.

       Car Wash Treatment
It is anticipated that the water supply for the proposed car wash will be obtained from a
combination of council water, captured roofwater and water reuse. The car wash treatment
and water reuse for this proposed development will be by others during the detailed design
phase of the project and will be subject to plumbing approval.




A PO Box 26, Carina Q 4152                                                                   19 | P a g e
E [email protected]
W www.vtce.com.au