Council.
The neighbourhood was surveyed for environmental effects.
1.4.4 Chemical sampling
Sampling of the Sidewinder Production Station discharge and the Piakau Stream upstream and downstream
of the discharge was scheduled to be carried out on two occasions, however these samples were unable to
be collected during 2021-2022 (this was due to a combination of factors such as COVID measures, the
skimmer pits requiring a large amount of rainfall to discharge, and the site being manned only during
advised that
these should be collected before the next rainfall event to prevent them entering waterways. There was a
low-flow discharge from the southern stormwater pond but not enough to collect a sample from. Water in
the stormwater drains was flowing. Water samples were collected from the remaining monitoring locations.
There was no foam or odour at any stream location.
2.1.2 Water quality sampling
Results of the two sampling surveys carried out in the 2022-20223 monitoring year are
Ordinary Council Agenda February 2024 Part 1
Mangati catchment consent monitoring report - Taranaki Regional Council.
and this water was very clean. No flaring was being undertaken
at time of inspection and the bunds were all effective. It was discussed with the site
manager that some realignment or installation of skimmer pits at northern end of the
ring drain may be necessary to improve site drainage.
23 August 2012
The site inspection was carried out after a period of prolonged rainfall although at
the time of inspection it was fine. The site was neat, tidy and well managed. The
skimmer pits were full
Project
Hotspot and Dotterel Defenders. I have had the
pleasure of working with Emily on a number of
occasions, both in schools and out in the field
and I have always been impressed with how
easily she relates to people. Emily starts on 16
October and we will be working together
throughout this term before she takes over
completely in January.
If you thought last winter was wet you were
right on the money. In August, all our
monitoring sites recorded rainfall
to South Taranaki
District Council as a local road
culvert update at Lake Mangamahoe – repairs to SH3 and new culvert to be installed by
NZ Transport Agency following recent heavy rainfall event.
4.3 Mr B Dowsett, NZ Transport Agency, provided a presentation to the Committee on State
Highway Investment Proposal and Corridor Management Plan.
Recommended
THAT the Taranaki Regional Council
1. receives and notes the Regional Report from the NZ Transport Agency dated 6
November 2022 and 1 March 2023) are presented
in Table 3, along with a summary of the historical data. Ammoniacal nitrogen results can fluctuate due to
factors like recent grazing, topography of the surrounding area and/or leachate generation from additional
stormwater infiltration. Since 2017 ammoniacal nitrogen has been consistently below 10 g/m3-N. Figure 3
shows ammoniacal nitrogen results since 2005. Some of the higher results (e.g. 2015), can be attributed to
heavy rainfall preceding
is 10 L/s. However as a result of stormwater inputs to the pond, the discharge
rate from the pond to the Mangorei Stream will be highly variable as it is dependent on weather conditions.
The size of the pond will allow storage for a 10% annual exceedance event (AEP) event. The maximum
discharge rate from the pond during large rainfall events is 1,060 L/s as this is dictated by the size of the
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5
outfall pipe (750 mm). However there is also provision for the pond
inspection.
Photo 1 Sand trap, 11 April 2019
3 July 2019
The inspection was undertaken during a rainfall event and found that the IBC's were well bunded and the
drain shut off valve was switched to the off position. There were no visible spills or sheens were found on
the site. The sand trap was full of sediment laden water (Photo 2). No dust or odour was observed to be
generated on site. Samples were taken of the site discharges and receiving waters above and below the site.
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