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
Colson Rd landfill leachate 22
Table 4 Results of analysis of under liner drainage 23
Table 5 Chemical analysis of the Manganaha Stream 24
Table 6 Chemical analysis of the Puremu Stream, sampled on 11
December 2013 25
Table 7 Chemical analysis of the Puremu Stream, sampled on 14
March 2014 26
Table 8 Results of metal analysis undertaken on 13 December 2013 27
Table 9 Results of rain event monitoring samples taken on 1 October
2013 28
Table 10 Results of rain event monitoring
sites are monitored for ammonia. Three
out of four sites fall within band A and one
site in band B. At these sites, ammonia is
likely to have little to no effect on all but the
most sensitive species. Modelled estimates
support the monitored results, with
approximately 68% in band A and 32% in
band B (Figure 4).
Four sites are monitored for nitrate, all of
which fall in band A. At these sites, nitrate is
likely to have little to no effect on aquatic
life. Modelled estimates largely
relation to composting and waste water irrigation areas.
page
Photo 1 A fyke net, set at site 2, Haehanga Stream.
Results and Discussion
On the day that the nets were set, a localised rain event caused flows to increase in the Haehanga Stream.
This also resulted in the discharge of sediment-contaminated stormwater into the Haehanga Stream,
resulting in discolouration. Although discolouration is frequently noted in this catchment, the degree of
discolouration at sites 2 and 3 was
Waitaha catchment consent monitoring report - Taranaki Regional Council.
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
stormwater catchments were
clean. The Herekawe Stream was in low flow, with slight turbidity resulting from the discharge that
dissipated within 25 m. There were no visible emissions to air. An odour survey was conducted around the
site at and no odours were noted.
22 February 2019
There was light rain falling during the inspection, however only 3 mm of rainfall had been recorded over the
previous week at the Brooklands Zoo monitoring station. Stormwater pond SV8000 contained 800 m3 of
improve
the area and reduce ponding. The culvert over the waterway looked good and
appeared to be coping with flood events. The area where muds were originally spread
had pasture establishing. The area where muds were most recently being applied had
good contouring and bunding across three sides. Some muds had migrated to the soil
surface through natural processes; these muds were found to be weathering and broke
apart easily when handled. Ponded water around the spreading area from recent rain
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
and buildings which is recorded at valuation. Donated assets are recognised
upon receipt of the asset if the asset has a useful life of 12 months or more, and the current value of the
asset is readily obtainable and significant. Significant donated assets for which current values are not readily
obtainable are not recognised. For an asset to be sold, the asset is impaired if the market price for an
equivalent asset falls below its carrying amount. For an asset to be used by the Trust, the