RFI Eng response notice items 4-19 MCU150111

Glenn Browning

From:                                  Andrew O'Neill <[email protected]>
Sent:                                  Wednesday, 20 January 2016 8:13 PM
To:                                    Glenn Browning
Subject:                               Re: Receiving Waterbody Definition



Hi Glenn

I would agree mostly with what you’ve written, probably more accurate to say that a small
pond won’t necessarily represent the ‘ultimate’ receiving environment. I know that councils
typically don’t want to consider ponds as part of a treatment train for 2 reasons:

    1. For those that will come into their ownership because of ongoing maintenance issues
       that are commonly associated with these assets.
    2. It could be agreed that at times ponds will perform a treatment function (primarily
       through sedimentation), at other times they can easily worsen water quality leaving the
       site.


Sorry, it’s hard to be definitive on this one, but ponds and lakes are generally only desirable if
they’re going to have a really good maintenance regime. In that case, it can be a benefit to
the ultimate receiving waters, but at significant cost.

A


Dr Andrew O'Neill
Principal Scientist – Manager, Water by Design




T (07) 3177 9107 | F: (07) 3177 9190


E [email protected]




                                                            1