surveys with the exception
of one manganese result.
The results of biological monitoring indicated that the discharge of treated stormwater and leachate
discharges from the Colson Road landfill site had not had any detrimental effect on the macroinvertebrate
communities of the Manganaha Stream. However, the results in the Puremu Stream and tributary indicate
there may be impacts in this stream. This may be a result of habitat differences between sites, or may result
from landfill discharges.
the yard stormwater to a soak hole or waterway
between milking. Stormwater must be directed to the farm dairy effluent treatment
system during milking and washdown of the yard. This will ensure that contaminated
stormwater cannot discharge to local waterways.
Clean water from plate coolers should be reused as washdown water.
1.2 Reducing manure
Manage the herd to reduce effluent. Consider the following:
Reduce noise and herd stress - treat the stock gently before
heavy applications of nitrogen (effluent)
early in the life of the plant. Current effluent application is considerably lower than previous
application rates. However nitrate concentrations in the soil profile underneath the
irrigation areas and in the tributaries flowing through or adjacent to the site remain
elevated.
A narrow but concentrated plume of ammonia is present in the groundwater and extends
from a previous leak in an effluent storage basin. This basin has since been repaired. A
discusses the results, their interpretation, and their significance for the environment.
Section 4 presents recommendations to be implemented in the 2017-2018 monitoring year.
A glossary of common abbreviations and scientific terms, and a bibliography, are presented at the end of
the report.
1.1.2 The Resource Management Act 1991 and monitoring
The RMA primarily addresses environmental ’effects‘, which are defined as positive or adverse, temporary or
permanent, past, present or future, or
surveys, all indicated that the water supply schemes did not appear to be causing any
significant adverse environmental effects.
page
A review of abstraction records showed that there were some minor non-compliances at Cold
Creek, Patea, and Waimate West plants in regards to daily volumes or abstraction rates.
However all of these plants were compliant for over 98% of the monitoring period.
During the monitoring period, STDC demonstrated an overall high level of
with any injection well
currently in use, or the ability of the receiving formation to accept injected fluids. The results of
groundwater quality monitoring undertaken show no adverse effects of the activity. Inspections undertaken
during the monitoring year found sites being operated in a professional manner and there were no
Unauthorised Incidents in relation to any of the Company’s DWI consents.
During the year, the Company demonstrated a high level of environmental and administrative
include a total of 186 conditions
setting out the requirements that the Company must satisfy. The Company holds five consents
to allow it to take and use water, five consents to discharge water or sediment into the Makara,
Mangaotea, and Mako streams, one consent to discharge wastes to land around Lake Ratapiko
and four land use permits for bed disturbance and structures in the Manganui River,
Mangaotea Stream and Lake Ratapiko. Seven additional consents allow Trustpower to abstract
water, and
the 2018-2019 monitoring year, with most
commencing irrigation in November or December and concluding for most in March. Rainfall recorded at
the Council’s monitoring locations over the summer irrigation period ranged between 58% and 111% of
historical mean values. A particularly dry October, along with warm coastal winds, caused soils to dry out
faster than normal which resulted in high irrigation water demand. Total usage during the 2018-2019
irrigation season, with a total water use across
DISCLAIMER
This report has been prepared by the Institute of Geological and
Nuclear Sciences Limited (GNS Science) exclusively for and under
contract to Taranaki Regional Council. Unless otherwise agreed in
writing by GNS Science, GNS Science accepts no responsibility for
any use of, or reliance on any contents of this Report by any person
other than Taranaki Regional Council and shall not be liable to any
person other than Taranaki Regional Council, on any ground, for any
loss, damage or
bibliography, are
presented at the end of the report.
1.1.3 The Resource Management Act 1991 and monitoring
The RMA primarily addresses environmental ‘effects’ which are defined as positive or
adverse, temporary or permanent, past, present or future, or cumulative. Effects may
arise in relation to:
page
2
(a) the neighbourhood or the wider community around a discharger, and may
include cultural and social-economic effects;
(b) physical effects on the locality, including