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
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Term four is here already!
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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
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
Regional Air Quality Plan for Taranaki 2011
conditions setting out the
requirements that the Company must satisfy.
12. Our monitoring included 33 inspections, one wet weather sampling run and one discharge only
sampling run for physicochemical analysis; along with a review of consent holder air quality monitoring
data, odour surveys, ambient air quality analyses, ambient PM10 monitoring, and deposition gauging.
13. During the year under review, the sites were generally well managed, with mostly only transient non-
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.
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
Waste Remediation Services Ltd Waikaikai Landfarm Annual Report 2022-2023
joins the stream at the main highway.
During the period under review there were several instances of biochemical oxygen demand (BOD)
concentrations in excess of consented limits, with an associated elevation in levels of BOD found in the
receiving waters during one of the wet weather surveys.
In the period under review the instream dissolved zinc and copper concentrations met the appropriate
USEPA acute or chronic exposure guidelines in all 18 samples. None of the 18 instream samples