highly variable as it would dependent on
the weather conditions. Monitoring over the past two years has shown that the primary means of
stormwater/wastewater discharge is via evaporation and soakage to land, as the Council has yet to observe
the stormwater retention pond discharging directly to the Mangorei Stream.
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Photo 1 Stormwater sediment/retention ponds system
1.2.1.1 Stormwater
All stormwater flows from within the site are directed to the retention pond
away from waterways
Use of grass strips within paddock to trap sediment
Where appropriate leave some vegetated cover to help protect soils
Having a plan B for adverse weather events, for example avoiding using
higher-risk areas during these times.
Ensuring there are appropriately sized vegetated buffers, ideally grassed.
As a rule of thumb, the steeper the slope the wider the buffer should be.
Avoiding grazing Critical Source Areas (see Critical Source Area
boundaries of the WWTP site appears to be governed largely by weather
conditions. Odour is strongest under calm condition, when aerial emissions from the pond accumulate. This
effect is accentuated when it is overcast, as vertical mixing with ambient air is reduced, and under warm
temperatures, when odour-generating bacteria in the pond are most active. Effects may be exacerbated by
reduction in aeration capacity (mechanical) in the pond and deterioration in the microfloral population of
this pond.
assessed for compliance with microbiological water quality
guidelines prepared by the Ministry for the Environment (MfE) and the Ministry of Health (MfE, 2003).
Eleven samples were collected at every monitored beach under dry weather conditions for State of the
Environment Monitoring (SEM) purposes, except when it was unsafe to do so. This was two less than normal
due to the COVID pandemic and associated lockdown restrictions. At eight of the ten coastal sites
monitored every year, an extra …
references 26
Appendix I Resource consents held by McKechnie Aluminium Solutions Ltd
List of tables
Table 1 Summary of resource consents held by MASL 6
Table 2 Results of comprehensive discharge and receiving environment monitoring 11
Table 3 Results of combined discharge (STW001027) and receiving water (MGO000031) monitoring 13
Table 4 Dry weather Sanger’s Intake (MGO000031) monitoring results 14
Table 5 Biomonitoring sites in the tributary of the Mangaone Stream 15
STDC Closed Landfills Annual Report 2022-2023
Waste Remediation Services Ltd Waikaikai Landfarm Annual Report 2022-2023
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Term four is here already!
S c h o o l s i n t h e e n v i r o n m e n t n e w s l e t t e r
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I hope you all managed to get some rest over the
last fortnight after what seemed to be a very wet
term three. I am sure there were many times
when you wondered if the wet weather was ever
going to end. You had good reason to think that
way, as according to Council records all of our
in Auckland and
Northland, major weather events are likely to occur
more regularly because of climate change and that’s
something we have to mitigate against and consider
when putting in place plans and long-term
strategies to protect our region. We will be
including more information and seeking feedback
on how we might address these issues in our 2024
Long Term Plan.
These changes and challenges represent
opportunities for the Council to ensure we have the
right systems and