overabundance of algae and aquatic weeds,
impact on the growth of sensitive species, or
even become toxic to freshwater organisms.
Five sites are monitored for ammonia, all of
which fall within band A. At these sites, ammonia
is not likely to have any toxic effect, even on the
most sensitive species. Modelling estimates
(Figure 4) however, suggest that around 66% of
rivers or streams are in band A, while 34% are in
band B.
Five sites are monitored for nitrate. One
undertaken on 20 February 2015 38
Table 10 Results of rain event monitoring – discharge and Puremu
Stream samples, 13 August 2014 39
Table 11 Results of rain event monitoring - Manganaha Stream, 13
August 2014 40
Table 12 Biomonitoring sites in the Puremu and Manganaha Streams
related to the Colson Road Landfill. 41
Table 13 Chemical analysis of Colson Road Landfill groundwater
sampled 9 June 2015 44
Table 14 Air deposition monitoring results for 13 January- 4 February
2015 45
River water quality
Nutrients
Ammonia, nitrate, and phosphorus are important for plant growth, but in excess amounts can cause
problems in freshwater. They can lead to an overabundance of algae and aquatic weeds, impact on the
growth of sensitive species, or even become toxic to freshwater organisms.
One site is monitored for ammonia, and falls in band A. At this site, ammonia is likely to have little to no
observed effect on ecosystem health. Modelled estimates supports the
bunded to contain any stormwater and organic leachate, and exclusion drains, bunds,
and diversions are situated around the ponds to divert clean stormwater away from
operational areas.
74. Stormwater runoff typically occurs immediately following rain events. The stormwater
volume depends on a number of factors, including the moisture content of the soil and
the intensity of the rain. The majority of contaminants contained within the stormwater
will be in the ‘first flush’ of water leaving
ponds before land
application. The pond is stirred as effluent is sprayed onto pastures via a travelling rain gun.
There are two storage ponds on the property, pond 1 has a storage capacity of 24,500 m3, and pond 2 has a
storage capacity of 19,320 m3.
The existing piggery, ponds, and irrigation areas in relation to the property are shown in Figure 1, and Figure 2
Figure 1 Location of Stanley Bros Trust Piggeries current buildings and effluent ponds
page
2 …
In terms of E. coli, bacteriological water quality in the latest survey period was similar in comparison with
historical surveys. The total number of samples falling within the “Alert” or “Action” categories (31% of
samples, or 35% if the samples of the Waimoku are included) across the 16 recognised bathing sites was
slightly higher than the recorded long-term average. However, it should be noted that the “Action” category
is the only category for which swimming is not recommended. In the
Waitaha catchment consent monitoring report - Taranaki Regional Council.
B K Raine
N W Walker
C S Williamson
Apologies
Notification of Late Items
Item Page Subject
Item 1 3 Confirmation of Minutes - 10 April 2018
Item 2 9 Confirmation of Minutes - 7 May 2018
Item 3 25 Consents and Regulatory Committee Minutes
Item 4 31 Policy and Planning Committee Minutes
Item 5 37 Executive, Audit and Risk Committee Minutes
Item 6 42 Joint Committee Minutes
Item 7 47 Adoption of the 2018/2028 Long-Term Plan
Item 8 50 Meeting Dates
Single sample >140 Two consecutive single
samples >280
Freshwater E. coli
(cfu/100 ml)
No single
sample >260
Single sample >260 Single sample >550
page
9
Photo 4 Taken at the coastal Site 4 at Wai-iti Beach, looking towards Site 5, with the Wai-iti Stream
entering from center-left
page
10
2 Results
2.1 Inspections
15 December 2016
Conditions were overcast with recent rain and a moderate north-westerly wind, although the camp