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


                     e. Service Station and Car Wash Treatment
The treatment of the water runoff from the service station and car wash areas has been
excluded from the MUSIC model as these areas will be treated separately.

     Service Station and Car Wash Assessment
While the site is not within Brisbane City Council, the acceptable solutions from the BCC
Guidelines for Stormwater from Service Stations & Fuel Dispensing Areas (FDA) will be used as
a reference for stormwater treatment for the service station and car wash areas under the
building canopy and areas outside of the canopy.
Under Canopy Areas:
    • All ground surfaces within the FDA shall be constructed of concrete with all gaps
        and/or cracks filled so that the impervious barrier and integrity is maintained.
    • The FDA shall be delineated by painted line-work on the ground. Other methods of
        delineating the FDA may be used e.g. Roll-over bunds, different colour concretes, etc.
    • Signs indicating fate of flow such as “flows to containment vessel” shall be provided in
        locations around the under-canopy area
    • The area shall be graded to a suitable underground containment vessel (i.e.
        sump/tank) compatible with petroleum products and other likely chemicals. The tank
        shall have no connections to sewer. The containment vessel shall be constructed of
        precast concrete with a minimum certified design life of 50 years and be designed in
        accordance with AS 3600 - “Concrete Structures”. All internal concrete surfaces that
        may be exposed to contact with petroleum hydrocarbons shall be coated with an
        epoxy resin, to a minimum dry film thickness of 200 microns, applied in accordance
        with the supplier’s recommendations. Joints shall be made with epoxy or rubber ring
        seals. Epoxy joints shall be Megapoxy P1 or approved equivalent and used in
        accordance with supplier’s recommendations. For joints using a rubber ring seal, the
        rubber type shall be NBR (nitrile) complying with AS 1646.3 (Elastomeric seals for
        waterworks purposes – Material requirements for pipe joints seals used in water and
        wastewater applications with the exception of natural rubber and polyisoprene
        compounds). The ring shall be water tight to 90kPa internal pressure and comply with
        the general requirements of AS 1646.1 (Elastomeric seals for waterworks purposes –
        General requirements).
    • The underground containment vessel shall maintain adequate capacity to contain
        both a volume equivalent to at least the volume of the largest tanker compartment
        likely to be delivering fuel to the site plus a nominal allowance for windblown rain.
    • The roof or canopy shall overhang by a horizontal distance of ¼ of the roof height out
        from the vertical above the boundary of the demarcated FDA.
    • Preference is for stormwater from roofed areas to be collected in tanks for non-
        potable use (e.g. toilet flushing or garden watering). Alternatively, it may be diverted
        directly to on-site stormwater infrastructure.
    • Bulk fuel transfers may be carried out under the canopy area within a defined Tanker
        Delivery Standing Area graded and drained to the underground containment
          vessel.
Areas Outside of Canopy:
   • All ground surfaces not under canopy shall be constructed of concrete or equivalent
       with all gaps and/or cracks filled so that the impervious barrier and integrity is
       maintained.

A PO Box 26, Carina Q 4152                                                                 18 | P a g e
E [email protected]
W www.vtce.com.au