Evaluation of environmental and consent performance
Besides discussing the various details of the performance and extent of compliance
by the consent holder/s during the period under review, this report also assigns a
rating as to each Company’s environmental and administrative performance.
Environmental performance is concerned with actual or likely effects on the
receiving environment from the activities during the monitoring year.
Administrative performance is concerned with the
day running of the site was generally of a
good standard. There were processes in place to minimise the contamination of stormwater and to
minimise the generation of wastewater, but this could be further improved. The discharge of wastewater
into the Kahouri Stream did not cause any recorded impact on the macroinvertebrate communities of this
stream, and the impact on water quality was minimal. However, discharge rates to the Kahouri Stream need
to be reduced to ensure a 1:100 dilution. The
the TRC to take up to 60,480
m3 per day at a maximum rate of 740 l/s of water from Lake Mangamahoe in the
Waiwhakaiho Catchment for municipal water supply purposes.
An aerial overview of the Mangorei HEPS is provided in Figure 1 below.
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Trustpower Limited – Mangorei Hydro-Electric Power Scheme 14
Figure 1: Schematic of the Mangorei Hydro-Electric Power Scheme
Mangamahoe
Stream
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Trustpower Limited – Mangorei Hydro-Electric
achieving sustainable development of the
region’s resources.
1.1.4 Evaluation of environmental and administrative performance
Besides discussing the various details of the performance and extent of compliance by the Company, this
report also assigns them a rating for their environmental and administrative performance during the period
under review.
Environmental performance is concerned with actual or likely effects on the receiving environment from the
activities during the monitoring
achieving sustainable development of the
region’s resources.
1.1.4 Evaluation of environmental and administrative performance
Besides discussing the various details of the performance and extent of compliance by the Company, this
report also assigns them a rating for their environmental and administrative performance during the period
under review.
Environmental performance is concerned with actual or likely effects on the receiving environment from the
activities during the monitoring …
discussing the various details of the performance and extent of compliance by the consent holder/s
during the period under review, this report also assigns a rating as to each Company’s environmental and
administrative performance.
Environmental performance is concerned with actual or likely effects on the receiving environment from the
activities during the monitoring year. Administrative compliance is concerned with the Company’s approach
to demonstrating consent compliance in site operations
mornings the two week rain forecast is received from ‘WeatherWatch’, a
professional weather forecasting business.
9.3 The irrigation model is updated using this information and emailed to Uruti.
9.4 The Uruti Site operator records the level in the irrigation pond Monday morning.
9.5 The Site Manager plans the weeks irrigation based on the irrigation pond level, the rain
forecast, and the application rate (rates are attached see Irrigation Areas/Rates). This
information is posted on the
1 Daily water abstraction by Ballance Agri-Nutrients, July
2013 – June 2014, m³ 16
Figure 2 Daily water abstraction by Ballance Agri-Nutrients, July
2014-June 2015, m³ 17
Figure 3 Irrigation areas 28
Figure 4 Nitrogen application rates on spray irrigation areas, January
1992 to June 2015 30
Figure 5 Locations of groundwater monitoring bores 34
Figure 6 Total nitrogen concentrations in groundwater beneath spray
irrigation areas (bores 10-2 and W1, and bore 10/5) 36
Figure 7
held.
The monitoring indicated the following:
The discharge of cooling water recorded an increasing ammonia concentration throughout the monitoring
period, though the impact to the Inaha stream was minimal. The thermal effect of the plant discharges were
within the thermal limits for the duration of the monitoring year. The abstraction of surface water and
groundwater was undertaken within compliance standards for the duration of the year. The dilution rate for
the surface water
sensitive macroinvertebrate taxa, and
higher respiration and decay rates.
> 0.006 and ≤ 0.010 > 0.021 and ≤ 0.030
C
Ecological communities are impacted by moderate DRP
elevation above natural reference conditions. If other
conditions also favour eutrophication, DRP enrichment
may cause increased algal and plant growth, loss of
sensitive macro-invertebrate and fish taxa, and high rates
of respiration and decay.
> 0.010 and ≤ 0.018 > 0.030 and ≤ 0.054
D