Attachment 1 - Stormwater Management Plan

                                                         Ocean Protect | OceanGuard Technical Design Guide

Features
The OceanGuard technology has the following features:

    -   Flow Diverter
        Directs flow into the unit for filtration of stormwater flows and includes an in-built rigid bypass to
        divert stormwater overflows in high-intensity and peak storm flows.
    -   Filtration Bag
        Removable coarse (gross pollutant removal) and fine grade (200micron) filtration bags.
    -   Filtration Cage
        The supporting cage that allows for the use of larger filtration bags.
The OceanGuard can also be fitted with an oil/hydrocarbon adsorbent material (optional) to capture and
retain oil and grease. The adsorbent material is contained in socks that are designed to ensure maximum
contact with stormwater as it enters the gully pit.

The OceanGuard is designed to be easily retrofitted into new and existing stormwater pits, requiring no
construction or land take. The OceanGuard is often the most practical solution and reduces the pollutant
load and maintenance burden on downstream infrastructure.

Configurations
The OceanGuard can fit a range of pits typically found in Australia including, kerb entry, rear entry with grated
drain entry as well as field gully pits. There are multiple sizes to suit pits ranging in plan dimensions of 450 x
450mm – 1200 x 1200mm. Additional custom sizes are available to suit circular and non-standard pits.

The standard OceanGuard configuration treats surface flow only, see figure 2. In some instances, it may be
necessary to treat pipe flow, see figure 3. Remember to limit the upstream catchment to the basket to no
more than 1000m2 (or DN300mm pipe) otherwise the peak flows may cause structural damage to the
OceanGuard. Furthermore, to assist design checks by a suitable qualified engineer need to be undertaken to
ensure the upstream catchment is not excessively large. Please note that the OceanGuard technology is not
a replacement for an in-line gross pollutant trap.




    Figure 2: Standard configuration – surface flow          Figure 3: Example configuration – pipe flow
Another typical configuration required, is where the runoff collected by grated strip or trench drains needs
to be treated, see figure 4.




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