process chemicals that are discharged
when the factory is operating. These absolute quantities vary from week-to-week
depending on the level of production. The concentration in the effluent also varies
depending on the current level of rainfall runoff. There are also minute quantities of
other chemicals that are used from time-to-time for research purposes.
Table 1 Pacific Natural Gut wastewater composition (approximate) when in operation
Component
Quantity
used per
month
the green waste.
However all the unacceptable materials were removed from the site before the green
waste was compacted and levelled and therefore would have had no long term
effect.
There was no leachate observed discharging from the sand dune area during the
period under review. The sandy substrate combined with low rainfall at the beach
would be restricting the production of leachate from the green waste..
3.3 Evaluation of performance
A tabular summary of STDC’s compliance
Inspections
During the 2014-2015 monitoring period four scheduled inspections of the Company’s
site were conducted by an officer of the Council. The following were found during the
inspections.
12 August 2014
The site was inspected in heavy rainfall conditions. It was observed that there was a
resulting high flow rate discharge of stormwater and it was noted that there was also a
high flow in the receiving water. It was reported that the manhole sumps had been
cleaned out recently and it was
monitored. 36
Figure 13 Manganui River water temperature differences between sites upstream
and downstream of the Motukawa HEP weir compared with the flow in
the Manganui River at State Highway 3 from 15 January to 15 February
2015. 37
Figure 14 Cumulative weight of elvers transferred from the Motukawa Power
Station during the 2014-2015 period 41
Figure 15 Elver transfer data for the monitoring years to date 41
Figure 16 Rainfall recorded at the Mangaotea Rd culvert on 19 & 20 June
first newsletter
of 2022.
We hope everyone has been able to relax
and enjoy the wonderful summer
weather we have been having although
the rain that is falling this weekend is
very welcome from a gardening point
of view. Here in New Plymouth, albeit
the sunniest city in New Zealand, rain
fell on 4 days in January giving a total of
12.5ml. Yesterday alone we had 180ml,
twice the normal rainfall for February.
Most of you will have received the 2022
Calendar of Events with the January
Zealand, where high rainfall and poor drainage provide
ideal conditions for it to establish. Due to land clearance and drainage, it is
now quite scarce or absent over much of its former range.
Swamp maire is an early to mid-succession canopy species that is frost
tender and shade intolerant. It requires high light levels, caused by some
disturbance event such as tree fall, for new seedlings to establish.
SWAMP MAIRE IN TARANAKI
Historically, swamp maire was plentiful
land
as a general rule.
Allowing discharges of treated dairy effluent to water
in exceptional circumstances – for example, on farms
on high-risk soils and on the upper ring plain where
there is high rainfall and drainage density, limiting the
ability to irrigate to land. High levels of treatment
would be required.
Requiring land treatment systems to have adequately
sized and lined holding ponds to meet storage
requirements.
Requiring feed pad
including
odour surveys and four water samples collected for physicochemical analysis.
27. The water samples from the unnamed tributary of the Waiongana Stream indicated that the Company
was in compliance with consent defined conditions on the four occasions they were collected. It is
noted that the stormwater facility discharge to surface water, only occurs during significant rainfall
events.
28. The facility is allowed noticeable, but not objectionable or offensive odour
in April
2023 indicate that the scheme had had little to no effect on the communities prior to this latest sampling
event. This could be attributed to the frequent rainfall during summer, as these flow conditions reduce the
influence of the HEP scheme activities. This is evident in the significant improvements in the
macroinvertebrate community health at the impact sites, while the control site was in average to above
average health. Consequently, based on the current (and previous) survey
Trustpower Pātea hydro power scheme resource consent monitoring report 2019-2020