cell of the secondary pond (using chlorophyll-a measurements)
indicated that the system had a low algal content, particularly following heavy rainfall events. Microfloral
populations have not indicated poor performance of the treatment system to date and generally indicate an
improvement in conditions in the tertiary cell since the last WWTP upgrade.
Screening of the outlet from the secondary oxidation pond was well maintained. The inlet system functioned
as designed during the monitoring
Quarterly Operational Report September 2019
Quarterly Operational Report September 2018
Zinc- acid
soluble
Zinc- dissolved
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16
In the previous May 2016 survey, suspended solids were very high (310 g/m3). The exact cause of this result
could not be identified but was likely due to rainfall and/or activities in the headwaters of the stream. The
results of the January 2017 and June 2017 surveys show very low suspended solids in comparison (Table 4).
There was a slight decrease of zinc by 0.071 g/m3 between site upstream 2 and the downstream site (0.255
The unnamed tributaries on this site are generally small,
clear running low energy brooks with silty beds, however with increased rainfall the
suspended solids level can rise quite quickly as silt is stirred up from the beds and
edges of the streams and is entrained in the flow. Overall the level of suspended
solids indicates good water quality in the stream system.
Apart from a slight comparative spike in conductivity levels in the results for June
2008 in the downstream sites, the
any stormwater treated in accordance with a finalised
Soil Erosion and Sediment Control Plan that has been approved by the Chief Executive,
Taranaki Regional Council, acting in a certification capacity. This finalised plan shall
conform to the Waikato Regional Council’s Guidelines for Soil Disturbing Activities and
shall detail methodology/ design of stormwater drainage from the cleanfill, and
maintenance of sediment control practices, with a specific focus on rainfall events.
14. This
3;
(c) the weight of each type material; and
(d) the origin of the material.
The information required by this condition shallmust be provided to the Chief
page
3
Executive, Taranaki Regional Council, within 24 hours of the material arriving on
site.
Site operations
7. The site shallmust be constructed and maintained to ensure that, at all times up to a 10 year
annual recurrence interval rainfall event:
(a) stormwater runoff is prevented from
Trustpower Motukawa hydro consent monitoring Annual report 2016-2017
Taranaki District Council, which operates the Eltham municipal wastewater
treatment system located to the east of Eltham in the Mangawhero catchment, holds a
resource consent to allow it to discharge treated wastewater to the Mangawhero Stream
under high rainfall conditions only. The consent for the discharge of emissions into the air
expired in mid 2011 and is no longer considered necessary. This report for the period July
2012 to June 2013 describes the monitoring programme implemented by the