responsible resource utilisation, to move closer to 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 STDC, this report also
assigns a rating as to STDC’s environmental and administrative performance during the period under review.
Environmental performance is concerned with actual or likely effects on the receiving environment from
and that of consent holders to resource management and, ultimately, through the refinement of methods
and considered responsible resource utilisation, to move closer to 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 …
Intake fish entrainment trial 18
2.1.3 Discharge monitoring 20
2.1.3.1 Stormwater and raw water treatment discharges 20
2.1.3.2 Contingency discharges 24
2.1.3.3 Domestic sewage 24
2.1.4 Receiving environment monitoring 24
2.1.4.1 Tributary monitoring for total nitrogen 26
2.2 Land 27
2.2.1 Inspections 28
2.2.2 Discharge monitoring 29
2.2.2.1 Effluent volume 29
2.2.2.2 Nitrogen application rates 29
2.2.2.2.1 Cut-and-carry areas 29
2.2.2.2.2 Grazed
Inspections 27
Discharge monitoring 28
Effluent volume 28
Effluent nitrogen 29
Nitrogen application rates 29
2.2.2.3.1 Cut and carry areas 29
2.2.2.3.2 Grazed areas 30
Soil and herbage monitoring 31
Spring 2016 soil and herbage survey 31
Autumn 2017 deep soil leaching profiles 32
Groundwater and related tributary monitoring 32
Electromagnetic induction survey 34
Groundwater monitoring in relation to effluent irrigation 34
Groundwater
be determined if the results originated from the activities at the consent holder’s site or from the
neighbouring properties. The guideline reflects a deposition rate that may cause complaints in a residential
area.
In the 2016-2017 year there were no unauthorised incidents related to discharges from any consent holders
in the Lower Waiwhakaiho area.
During the year, Downer EDI Works Ltd demonstrated a high level of environmental and administrative
performance with their resource
exceeded six of the 12 samples
collected, while Downer EDI exceeded one sample from 10. The highest result during the year
under review was obtained by one of the Fitzroy Engineering Group Ltd gauges, which was
more than twice the guideline rate. The guideline reflects a deposition rate that may cause
complaints in a residential area.
In the 2015-2016 year there were no unauthorised incidents related to discharges from any
consent holders in the Lower Waiwhakaiho area.
During the year,
utilisation, to move closer to 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 consent holder during the period under review, this report also assigns a rating as
to the Company’s environmental and administrative performance.
Environmental performance is concerned with actual or likely effects on the receiving
environment
discussing the various details of the performance and extent of compliance by the consent holders,
this report also assigns a rating as to each Company’s environmental and administrative performance during
the period under review. The rating categories are high, good, improvement required and poor for both
environmental and administrative performance. The interpretations for these ratings are found in
Appendix II.
For reference, in the 2021-2022 year, consent holders were found to achieve a high
periphyton for all sites and by
testing the significance of any trend using the Mann-Kendall test at the 5% level, followed by
Benjamini-Hochberg False Discovery Rate (FDR) analysis. Of the trends, ten were significant
at the 5% level. Two remained significant after FDR application.
page
Most upstream sites, except for those in the Waiwhakaiho and Waiongana Streams,
generally contained a low periphyton biomass throughout the year. Almost all downstream
sites, except the Stony River and
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